Home

EN 1495:1997+A2

1. S 235 yield strength f 235 N mm A 0 1 2 3 4 5 6 7 8 9 20 1 05 1 05 1 05 1 06 1 06 1 06 1 07 1 07 1 07 1 08 30 1 08 1 08 1 09 1 09 1 10 1 10 1 10 1 11 1 11 1 11 40 1 12 1 12 1 12 1 13 1 14 1 14 1 14 1 15 1 16 1 16 50 1 17 1 17 1 18 1 18 1 19 1 19 1 20 1 21 1 21 1 22 60 1 23 1 23 1 24 1 25 1 26 1 26 1 27 1 28 1 29 1 30 70 1 31 1 31 1 32 1 33 1 34 1 35 1 36 1 37 1 39 1 40 80 1 41 1 42 1 43 1 45 1 46 1 47 1 49 1 50 1 52 1 53 90 1 55 1 56 1 58 1 60 1 61 1 63 1 65 1 67 1 69 1 71 100 1 74 1 76 1 78 1 81 1 83 1 86 1 89 1 92 1 95 1 98 110 2 01 2 05 2 08 2 12 2 16 2 20 2 24 2 27 2 31 2 35 120 2 39 2 43 2 47 2 51 2 55 2 60 2 64 2 68 2 72 2 76 130 2 81 2 85 2 89 2 94 2 98 3 03 3 07 3 12 3 16 3 21 140 3 26 3 30 3 35 3 40 3 44 3 49 3 54 3 59 3 64 3 69 150 3 74 3 79 3 84 3 89 3 94 3 99 4 04 4 09 4 15 4 20 160 4 25 4 31 4 36 4 41 4 47 4 52 4 58 4 63 4 69 4 74 170 4 80 4 86 4 91 4 97 5 03 5 09 5 15 5 20 5 26 5 32 180 5 38 5 44 5 50 5 56 5 62 5 69 5 75 5 81 5 87 5 93 190 6 00 6 06 6 12 6 19 6 25 6 32 6 38 6 45 6 51 6 58 200 6 64 6 71 6 78 6 85 6 91 6 98 7 05 7 12 7 19 7 26 210 7 33 7 40 7 47 7 54 7 61 7 68 7 75 7 82 7 89 7 97 220 8 04 8 11 8 19 8 26 8 33 8 41 8 48 8 56 8 63 8 71 230 8 79 8 86 8 94 9 02 9 10 9 17 9 25 9 33 9 41 9 49 240 9 57 9 65 9 73 9 81 9 89 9 97 10 05 10 13 10 22 10 30 Table A 6 values for S 275 S 275 yield strength f 275 N mm A 0 1 2 3 4 5 6
2. S 355 yield strength f 355 N mm A 0 1 2 3 4 5 6 7 8 9 20 1 06 1 06 1 07 1 07 1 08 1 08 1 09 1 09 1 09 1 10 30 1 10 1 11 1 11 1 12 1 13 1 13 1 14 1 14 1 15 1 15 40 1 16 1 17 1 17 1 19 1 19 1 20 1 20 1 21 1 22 1 23 50 1 24 1 25 1 26 1 26 1 27 1 28 1 30 1 31 1 32 1 33 60 1 34 1 35 1 37 1 38 1 39 1 39 1 41 1 42 1 44 1 47 70 1 49 1 50 1 52 1 54 1 56 1 58 1 60 1 63 1 65 1 67 80 1 70 1 73 1 75 1 78 1 81 1 85 1 88 1 92 1 95 1 99 90 2 03 2 08 2 12 2 17 2 22 2 26 2 31 2 36 2 41 2 46 100 2 51 2 56 2 61 2 66 2 71 2 77 2 82 2 87 2 93 2 98 110 3 04 3 09 3 15 3 20 3 26 3 32 3 38 3 43 3 49 3 55 120 3 61 3 67 3 73 3 80 3 86 3 92 3 98 4 05 4 11 4 18 130 4 24 4 31 4 37 4 44 4 51 4 57 4 64 4 71 4 78 4 85 140 4 92 4 99 5 06 5 13 5 20 5 28 5 35 5 42 5 50 5 57 150 5 65 5 72 5 80 5 87 5 95 6 03 6 11 6 19 6 26 6 34 160 6 42 6 50 6 59 6 67 6 75 6 83 6 91 7 00 7 08 7 17 170 7 25 7 34 7 42 7 51 7 60 7 68 7 77 7 86 7 95 8 04 180 8 13 8 22 8 31 8 40 8 50 8 59 8 68 8 77 8 87 8 96 190 9 06 9 15 9 25 9 35 9 44 9 54 9 64 9 74 9 84 9 94 200 10 05 10 14 10 24 10 34 10 44 10 5 10 65 10 75 10 86 10 96 210 11 07 11 17 11 28 111 38 11 49 111 60 11 71 11 82 11 93 12 03 220 12 14 1226 12 37 12 48 12 59 12 70 1282 12 93 13 04 13 16 230 13 27 13 39 13 51 1362 13 74 13 86 13 98 14 09 14 21 14 33 240 1445 14 57 14 70 1482 14 94 15 06 15 19 15 31 15 43 15 56 A 1 4 Analysis A 1 4 1 Ge
3. Masts vertical or inclined between 0 and 30 to the vertical Masts which are standing or hanging Movable or static base chassis or base frame Manually or power operated elevation Towed or self powered ground travel on site excluding road traffic regulation requirements Driven using electric pneumatic or hydraulic motors 1 4 This standard identifies the hazards arising during the various phases in the life of such equipment and describes methods for the elimination or reduction of these hazards and for the use of safe working practices BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 1 5 This standard does not specify the requirements for dealing with the hazards involved in the manoeuvring erection or dismantling fixing or removing of any materials or equipment which are not part of the Mast Climbing Work Platform MCWP Neither does it deal with the handling of specific hazardous materials 1 6 This standard does not specify the requirements for delivering persons and materials to fixed landing levels Such equipment is referred to as lifts or hoists and are dealt with by other standards 1 7 This standard does not include Mobile Elevating Work Platforms MEWPs according to EN 280 4d Suspended access equipment according to EN 1808 af or Lifting tables according to EN 1570 q 2 Normative references F The following referenced documents are indispensable for the application of this document
4. A relay contact or a contactor failing to open or close An auxiliary switch such as a limit switch hand operated switch etc failing to open or close Interruption or short circuit in a signal transmitter such as a potentiometer strain gauge bridge or transducer Interrupted connection of or short circuit in a semiconductor component such as transistor diode or optocoupler or a capacitator 69 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Short circuit or interruption in a resistor A defect causing the output of an integrated circuit to give a positive or negative potential if several similar circuits are mounted on a semiconductor printed circuit board allowance shall be made for the same defect occurring simultaneously in all circuits NOTE Requirements for microprocessor applications are under consideration C 2 3 2 The provisions of C 2 3 1 do not apply to the following defects Short circuit between the cores of a cable if the cable satisfies the requirements provided in the relevant national standard s and if the rated voltage of the auxiliary circuit does not exceed that of the cable A contact not opening if the relay satisfies the requirements in EN 60947 5 1 and proper protection against influences from the ambience is installed A contactor contact not opening if the contact load does not exceed 25 of its rated power and proper protection against influences from the ambience i
5. Instructions with regard to the use of slightly raised outriggers during transfer conditions in order to avoid instability from for instance failure of one tyre 7 1 2 7 Operation instructions These shall include the following Operating procedures including information on safe distances such as the clearance to power cables and other overhead structures and between the platform and the building Emergency procedures including the operation of safety devices resetting by a competent person and action to be taken in case of power loss including the safe use of the means for emergency lowering This must include clear instructions regarding the safe lowering distance increments and any rest periods needed in order to avoid the overheating of brake linings That travelling controls cannot be operated with any other movement unless the MCWP is in transfer condition The use of relevant personal protective equipment such as hard hats protective shoes eye protection 7 1 2 8 Operating personnel requirements The instruction handbook shall state to the user the minimum requirements for the abilities of operating personnel 7 1 2 9 Operating procedure requirements These shall include the following Each day before the MCWP is taken into use the user shall check the operating devices brakes and emergency stops The condition of all trailing cables travel limit switches guardrails structural connecting mast ties ca
6. Means shall be provided to ensure or at least give proper warning that the MCWP is in the proper transfer or transport condition If the platform must be locked at a position on the chassis during transport then transport interlocks shall be provided Means shall be provided to prevent instability of the MCWP due to failure of any tyre of the chassis for example by the provision of foam filled tyres or by giving instructions in the user manual regarding use of outriggers 5 2 2 4 Drive to wheels excluding road transport The chassis shall be capable of being stopped and held stationary with a braking device under all ground conditions and also the worst combination of horizontal speed and maximum gradient specified by the manufacturer The brakes shall only be released and kept released by an intended action Under all conditions the brake shall apply automatically After being applied the means of braking shall not depend on an exhaustible energy source Acceleration and retardation must be within the manufacturer s stability criteria It shall be possible to disengage the drive to the wheels before towing the MCWP For rail mounted chassis means shall be provided to stop the machine safely at the limits of travel If axles are detachable the chassis shall be equipped with fixings for safe and secure attachment of the axles when they are in use 5 2 2 5 Outriggers Outriggers shall be capable of carrying all loads permitted b
7. 5 1 2 3 1 Manual forces The minimum value for the manual force is assumed to be 200 N for each of the first two persons on the platform and 100 N for each additional person permitted to be on the work platform It is assumed that the force is applied at a height of 1 1 m above the floor of the work platform and acts in a horizontal direction 19 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 5 1 2 3 2 Forces from the use of power tools Where the manufacturer of the MCWP permits the use of power tools which impose horizontal reaction forces on the work platform which are in excess of those given in 5 1 2 3 1 then the manufacturer shall specify the maximum force permitted It is to be assumed that the force is applied at a minimum height of 1 1 m above the floor of the work platform Such forces may be caused by the use of for example Water jetting equipment Sand or grit blasting equipment Mechanically assisted drilling machine Hammer assisted drill Electrically driven hammer breaker 5 1 2 3 3 Forces from the use of weather protection screens on the Work Platform If the Work Platform is designed to permit the use of weather protection in the form of a roof over part of or the whole of a work platform then the resulting wind forces shall be considered to act on walls which reach the full height from the work platform floor to the top of the roof Wind forces shall be calculated according to 5 1 2 5 a
8. 200 11 8 12 0 12 3 12 5 12 8 10 6 10 8 11 0 12 2 11 4 64 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Table A 14 o values for aluminium alloys 8 9 and 10 Alloy 8 Alloy 9 10 yield strength fy 100 N mm yield strength f 80 N mm 0 2 4 6 8 0 2 4 6 8 20 1 00 1 00 1 01 1 03 1 05 1 00 1 00 1 00 1 02 1 04 30 1 07 1 09 1 11 1 14 1 16 1 06 1 09 1 11 1 14 1 16 40 1 19 1 21 1 24 1 26 1 29 1 18 1 21 1 23 1 26 1 28 50 1 31 1 34 1 37 1 40 1 48 1 31 1 34 1 37 1 40 1 48 60 1 46 1 50 1 53 1 57 1 60 1 46 1 49 1 52 1 56 1 59 70 1 63 1 67 1 71 1 75 1 79 1 62 1 66 1 69 1 73 1 77 80 1 83 1 87 1 91 1 95 2 00 1 80 1 84 1 87 1 91 1 95 90 2 05 2 10 2 15 2 20 2 25 1 99 2 03 2 08 2 12 2 17 100 2 31 2 37 2 42 2 48 2 54 2 21 2 26 2 30 2 35 2 40 110 2 60 2 67 2 75 2 85 2 95 2 45 2 50 2 56 2 61 2 66 120 3 05 3 15 3 25 3 36 3 47 2 12 2 78 2 83 2 89 2 95 130 3 58 3 69 3 80 3 91 4 03 3 01 3 08 3 15 3 21 3 28 140 4 15 4 27 4 39 4 51 4 64 3 35 3 42 3 51 3 61 3 71 150 4 76 4 89 5 02 5 15 5 28 3 81 3 91 4 20 4 12 4 23 160 5 42 5 55 5 69 5 83 5 97 4 33 4 44 4 55 4 67 4 78 170 6 12 6 26 6 44 6 56 6 74 4 93 5 01 5 13 5 24 5 36 180 6 86 7 01 7 16 7 32 7 48 5 49 5 61 5 73 5 86 5 98 190 7 64 7 80 7 96 8 13 8 30 6 11 6 24 6 37 6 50 6 64 200 8 47 8 64 8 81 8 98 9 16 6 77 6 91 7 05 7 18 7 32 65 BS EN 1495 1997 A2 2009 EN
9. 7 1 2 5 Safety equipment Type of safety equipment e g safety gear terminal stopping switches and final limit switches Additional safety equipment for erection and dismantling Emergency lowering equipment 7 1 2 6 Additional technical information This shall include the following 46 Outrigger arrangements Ground bearing pressure and the hazards associated with changing ground conditions Tie arrangement and forces imposed on the supporting structure for given wind zones Freestanding arrangements for given wind speeds Need for protection regarding hazardous areas around the MCWP Provision of adequate lighting for safe operation Precautions about platform extension between the building and the mast Information regarding any lifting points Consideration of the possible requirements for lightning protection Consideration of the effects of any item which significantly increases the wind area see 5 1 2 3 3 Consideration of any effects which significantly increase the wind speed e g adjacent tall buildings etc Where any non standard configurations are required these shall be agreed between the manufacturer the owner and the user and information shall be added as an addendum to the instruction handbook Transport procedure to and from site including the need for meeting the traffic regulations Transfer of the MCWP around the site including maximum gradient BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E
10. Band brakes shall not be used 5 4 3 2 Special requirements for electro mechanical brakes 5 4 3 2 1 In normal operation a continuous flow of current shall be required to hold off the brake The interruption of this current shall be effected by at least two independent electrical devices whether or not integral with those which cause interruption of the power supply of the drive motor If when the work platform is stationary one of the contactors has not opened the main contacts further movement shall be prevented at the latest at the next change in the direction of motion 5 4 3 2 2 When the motor of the work platform is likely to function as a generator it shall not be possible for the electric device operating the brake to be fed by the driving motor Braking shall become effective without delay after opening of the brake release circuit the use of a diode or capacitor connected directly to the terminals of the brake coils shall not be considered as a means of delay 5 4 3 3 Special requirements for hydro mechanical brakes 5 4 3 3 1 In normal operation a continuous oil pressure shall be required to hold off the brake 5 4 3 3 2 When the motion of the platform is initiated the brake shall not reach the hold off position before the normal operating torque for the drive is attained 5 4 4 Buffers 5 4 4 1 MCWP shall be provided with buffers at the bottom limit of the travel of the work platform 5 4 4 2 The total possible stroke of
11. Copyright subsists in all BSI publications BSI also holds the copyright in the UK of the publications of the international standardization bodies Except as permitted under the Copyright Designs and Patents Act 1988 no extract may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic photocopying recording or otherwise without prior written permission from BSI This does not preclude the free use in the course of implementing the standard of necessary details such as symbols and size type or grade designations If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained Details and advice can be obtained from the Copyright and Licensing Manager Tel 44 0 20 8996 7070 Email copyright bsigroup com
12. Fixed access between the two work platforms shall be provided within the platform guarded area Trapdoors shall comply with 5 3 1 2 For option B direct access between work platforms shall not be provided 5 3 4 8 For option A with multiple mast applications platform levelling shall be in accordance with 5 3 1 1 The design shall ensure that clearance remains between the subsidiary work platform and the mast over the full levelling range 5 3 4 9 Controls shall be in accordance with 5 12 5 3 4 10 Buffers shall be in accordance with 5 4 4 For option A where the subsidiary work platform is located below the primary work platform the height of the buffer shall be increased in order to act on the primary work platform 5 3 4 11 For option A travel limit switches shall be in accordance with 5 11 taking into account the position of the subsidiary work platform For option B separate travel limit switches shall be provided for each work platform all in accordance with 5 11 making allowance for the separation distance required in 5 3 4 6 30 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 5 4 Drive systems for elevation 5 4 1 General 5 4 1 1 The maximum rated speed when raising and lowering the platform shall be no more than 0 2 m s 5 4 1 2 Fixed guarding shall be provided to prevent the entry of any material that might cause damage to any part of the drive system and to protect persons from injury F When it is foreseen e g for mai
13. N mm7 E 70 000 modulus of elasticity N mm G 27 000 shear modulus N mm 35 elongation at failure on gauge length of 5 times the diameter of the original cross section S safety factor on yield strength V safety factor on tensile strength A 2 1 1 Standardised structural aluminium alloys Table A 8 Standardised aluminium alloys Alloy No Alloy Condition 1 AlZn4 5Mg11 F35 2 AlMgSi1 F32 3 AlMgSi1 F28 4 AIMgSi0 5 F22 5 AlMg4 5Mn G31 6 AIMg4 5Mn W28 7 AlMg4 5Mn F27 8 AIMg2Mn0 8 F20 9 AIMg2Mn0 8 F19 10 AIMg3 F18 60 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E A 2 1 1 1 Nominal values of material properties Table A 9 Properties of standardised aluminium alloys Alloy No Nominal thickness t of the element t lt 10 mm fy N mm fu N mm 1 275 350 2 255 315 3 200 275 4 160 215 5 205 310 6 125 275 7 125 275 8 100 200 9 80 180 10 80 180 A 2 1 1 2 Permissible stresses Oo fy S respectively f V Sa 1 7 Va 2 5 Sp 1 55 Vp 2 25 Sc 1 4 Vc 2 05 61 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Table A 10 Permissible stresses for standardised aluminium alloys in N mm Load Case A B C Basic Welds Basic Welds Basic Welds Material Material Material Alloy Ta Oa Ta Oa T Oa Ta Oa Ta Oa Ta 1 160 95 75 60 180 110
14. b Voltage pulses between mains and earth Amplitude 500 V Pulse duration 100 ns measured at 50 of the peak value of the voltage pulse Rise time 10 ns Pulse repetition rate 10 Hz c Voltage pulses between inputs or outputs and earth common mode Amplitude 500 V Pulse duration 100 ns measured at 50 of the peak value of the voltage pulse Pulse repetition rate 10 Hz Rise time 10 ns d Alternating magnetic fields Magnetic field strength 400 A m Frequency 50 Hz e Electromagnetic fields Strength 4 V m Frequency 100 kHz to 500 MHz 68 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E C 2 Reporting defects C 2 1 The occurrence in a detecting device of the defects given below in C 2 3 shall not cause inability to switch off the MCWP if the limit value is exceeded C 2 2 The detecting device shall be designed and connected to the electric installation of the MCWP in such a way that 1 After the occurrence of one of the defects or actions given under C 2 3 1 a the MCWP installation is automatically switched off and can no longer be started before the defect or interruption is eliminated and 2 After occurrence of one of the defects given under C 2 3 1 b and after the MCWP is switched off the MCWP can no longer be started before the defect is eliminated This requirement does not apply if continued safe operation of the MCWP is automatically ensured by the detecting device NOTE The provisions under C 2 2 can be me
15. 0 7 62 7 82 8 03 8 24 8 45 160 11 3 11 6 11 9 12 2 12 5 8 67 8 89 9 11 9 33 9 56 170 12 8 13 1 13 4 13 7 14 0 9 79 10 0 10 2 10 4 10 7 180 14 4 14 7 15 0 15 3 15 7 10 9 11 2 11 4 11 7 11 9 190 16 0 16 3 16 7 17 0 17 4 12 2 12 4 12 7 13 0 13 2 200 17 7 18 1 18 4 18 8 19 2 13 5 13 8 14 0 14 3 14 6 Table A 13 values for aluminium alloys 6 and 7 Alloy 7 profiles Alloy 6 7 profiles and box sections of yield strength f 140 N mm sheet metal yield strength fy 125 N mm A 0 2 4 6 8 0 2 4 6 8 20 1 00 1 00 1 01 1 03 1 05 1 00 1 00 1 01 1 03 1 05 30 1 07 1 09 1 11 1 14 1 16 1 07 1 09 1 11 1 14 1 16 40 1 19 1 21 1 24 1 27 1 30 1 19 1 21 1 24 1 26 1 29 50 1 33 1 35 1 38 1 42 1 45 1 32 1 35 1 38 1 41 1 44 60 1 49 1 53 1 57 1 61 1 65 1 47 1 51 1 55 1 58 1 62 70 1 70 1 75 1 80 1 85 1 90 1 66 1 70 1 75 1 79 1 84 80 1 96 2 01 2 09 2 19 2 29 1 88 1 93 1 98 2 03 2 08 90 2 40 2 51 2 62 2 73 2 85 2 14 2 24 2 34 2 44 2 55 100 2 96 3 08 3 20 3 33 3 46 2 65 2 75 2 87 2 98 3 09 110 3 59 3 72 3 85 3 99 4 13 3 21 3 32 3 44 3 57 3 69 120 4 27 4 41 4 56 4 70 4 85 3 82 3 94 4 07 4 21 4 34 130 5 01 5 18 5 32 5 48 5 64 4 48 4 62 4 76 4 90 5 05 140 5 81 5 97 6 14 6 32 6 49 5 19 5 34 5 50 5 65 5 82 150 6 67 6 85 7 03 7 21 7 40 5 96 6 12 6 28 6 45 6 62 160 7 58 7 78 7 97 8 16 8 36 6 78 6 95 13 7 30 7 48 170 8 56 8 77 8 97 9 18 9 39 7 66 7 84 8 02 8 21 8 40 180 9 60 9 81 10 0 10 2 10 4 8 59 8 78 8 97 9 17 9 37 190 10 7 10 9 11 1 11 3 11 6 9 57 9 77 9 97 10 1 10 3
16. 1 2 7 x loads Out of service wind loads 5 1 2 8 X Buffer forces 5 1 2 9 X Action of safety means 5 1 2 10 X Inaccuracies in setting up 5 1 2 11 X X X X X X Table 5 Safety factors for structural steels Load case Safety factor A1 A2 1 5 B1 B2 B3 B4 1 33 C1 C2 C3 1 25 23 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Table 6 Safety factors for structural aluminium alloys Load case Safety factor A1 A2 1 7 B1 B2 B3 B4 1 55 C1 C2 C3 1 4 5 1 4 Structural calculations See Annex A informative 5 1 5 Stability calculations 5 1 5 1 Calculation of forces 5 1 5 1 1 Forces causing overturning moments shall when created by structural masses be multiplied by a factor of 1 1 and when created by rated loads be multiplied by a factor of 1 2 It must be remembered here that an inclination of mast from the vertical will result in an increasing overturning moment as the work platform travels upwards All forces causing stabilizing moments shall be multiplied by a factor of 1 0 5 1 5 1 2 Wind forces shall be multiplied by a factor of 1 2 and assumed to be acting horizontally 5 1 5 1 3 Horizontal forces as detailed in clause 5 1 2 3 shall be multiplied by a factor of 1 2 and assumed to be acting in the direction creating the greatest overturning moment 5 1 5 1 4 Forces according to 5 1 2 6 shall be treated in the same
17. 12100 1 2003 Safety of machinery Basic concepts general principles for design Part 1 Basic terminology methodology ISO 12100 1 2003 EN ISO 12100 2 2003 Safety of machinery Basic concepts general principles for design Part 2 Technical principles ISO 12100 2 2003 ISO 4301 1 1986 Cranes and lifting appliances Classification Part 1 General ISO 4302 1989 Cranes Wind load assessment BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E ISO 6336 1 Calculation of load capacity of spur and helical gears Part 1 Basic principles introduction and general influence factors ISO 6336 2 Calculation of load capacity of spur and helical gears Part 2 Calculation of surface durability pitting ISO 6336 3 Calculation of load capacity of spur and helical gears Part 3 Calculation of tooth strength ISO 6336 5 Calculation of load capacity of spur and helical gears Part 5 Strength and quality of materials ISO 8686 1 1989 Cranes Design principles for loads and load combinations Part 1 General 3 Definitions For the purposes of this standard the following definitions apply NOTE The terms which are used in this standard with reference to the definitions below are indicated in figures 1 and 2 3 1 rated load the loads for which the MCWP has been designed for in normal operation as stated in the load diagram 3 2 load diagram a notice displayed on the work platform showing the permit
18. 1495 1997 A2 2009 E Annex B normative Special requirements for multilevel work platforms Table B 1 OPTION A Mounted on and or below the primary Work Platform Requirements Single Mast Multiple Masts Allow for the effect on calculations Allow for mass of multilevel work platform Rated load Allow for additional forces on mast Yes Yes and mast ties Allow for additional in amp out of Yes Yes service wind forces Allow for the effect on stability Yes Yes Guard rails and toeboards Yes Yes Ladder Yes Yes Trap door Yes Yes Fixings and stability of subsidiary work platform in relation to the primary work platform YES by adequate fixings to primary work platform Supported on primary work platform or on platform extensions or both Yes any combination Platform levelling according to 5 3 1 1 according to 5 3 1 1 with assurance that clearance remains between subsidiary work platform and mast for full levelling range Controls Visibility must remain at control point Protection from falling objects NA Emergency lowering Standard arrangements Buffers according to 5 3 4 10 and Instruction handbook Upper travel limit switch Standard arrangements Lower travel limit switch Special adjustment when subsidiary work platform is below primary work platform Separation distance between work platforms Fixed separation lt 3 m Sa
19. 2 2 moving parts exhaust gases etc 14 2 Inadequate visibility from operators position 5 12 2 5 12 5 14 3 Inadequate seat seating NA 14 4 Inadequate non ergonomic design positioning of controls 5 12 14 5 Starting moving of self propelled machinery 5 12 14 6 Road traffic of self propelled machinery 7 1 2 6 7 1 2 12 14 7 Movement of pedestrian controlled machinery 7 1 2 6 7 1 2 12 15 Mechanical hazards 5 1 1 1 15 1 Hazards to exposed persons due to uncontrolled 5 2 2 1 5 2 4 5 3 1 5 5 4 1 7 1 2 7 movement 15 2 Hazards due to break up and or ejection of parts 5 2 1 4 5 2 1 5 5 2 2 3 15 3 Hazards due to rolling over ROPS 5 1 5 15 4 Hazards due to falling objects FOPS 7 1 2 7 15 5 Inadequate means of access 5 3 3 5 3 4 15 6 Hazards due to towing coupling connecting 5 2 2 6 transmission etc 15 7 Hazards due to batteries fire emissions etc NA 16 Hazards due to lifting operations 16 1 Lack of stability 5 1 5 5 1 1 2 5 2 2 4 5 2 2 5 5 2 5 1 16 2 Derailment of machinery 5 2 2 4 5 4 1 5 5 4 2 16 3 Loss of mechanical strength of machinery and lifting 5 1 5 2 1 7 5 2 1 8 5 2 2 2 5 2 2 3 5 2 3 2 accessories 5 2 3 3 5 2 5 2 5 2 5 3 5 3 1 4 5 4 2 5 4 3 16 4 Hazards caused by uncontrolled movement 5 2 2 5 5 2 4 5 4 1 5 11 17 Inadequate view of trajectories of the moving parts 5 12 18 Hazards caused by lightning 7 1 2 19 Hazards due to loading overloading 5 7 14 BS EN 1495 1997
20. 5 6 3 The emergency lowering means shall not prevent the operation of the devices according to 5 5 1 1 a and 5 5 3 j 5 6 4 Means for emergency raising of the work platform may be fitted in addition to the means for emergency lowering When fitted the emergency raising means shall comply with 5 6 1 as well as 5 6 3 with the word raising substituted for lowering in all cases 5 7 Overload moment device 5 7 1 The MCWP shall be provided with an overload and moment detecting and indicating device For exception see 5 7 16 5 7 2 This device shall detect the total load due to persons equipment and materials on the work platform It shall also detect those moments due to these loads that are likely to lead to overturning or failure of the MCWP This device shall at least detect Bending and torque moments on cantilevered main platforms Bending and torque moments on the central part of simply supported main platforms Bending moment on the mast 5 7 3 Overload moment detection device shall be carried out at least whilst the work platform is stationary 5 7 4 The overload noment detector shall be consistent with the rated loads and their location shown or described on the rated load chart s for the MCWP 5 7 5 The load and moment detection and indication shall function a Automatically for the different possible platform configurations or 36 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E b If automatic detectio
21. 6 Loading in the longitudinal direction Multiple mast machines BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 5 1 2 2 4 If the area of the main platform or part of it is increased by means of extensions usually to the longitudinal edge of the platform the mass of the number of persons allowed on the platform according to 5 1 2 2 1 shall be assumed to act on these longitudinal edges according to 5 1 2 2 2 5 1 2 2 5 In order to provide long cantilever extensions of restricted width to reach more distant work points an exception to 5 1 2 2 4 may be made but shall be clearly explained on a sign easily visible on that particular extension to the main platform In no such case shall the load on the extension be calculated for less than two persons mp carrying their personal equipment m In order to restrict the available platform extension area such extensions shall not be more than 0 6 m wide See Figure 7 Dimensions in metres E E pi Ta E E Key 1 main platform 2 platform extension Figure 7 Long cantilever extensions 5 1 2 2 6 Where the manufacturer includes in his design provision for the use of a handling crane then the mass of the crane and the crane s rated load shall together be treated as part of the rated load of the MCWP The location of the force resulting from the use of the crane shall be dictated by the manufacturer s chosen mounting positions for the crane supports 5 1 2 3 Horizontal forces
22. A2 2009 EN 1495 1997 A2 2009 E Table 1 3 List of hazards part 3 Hazards according to the second amendment to the Machinery Directive involving the lifting of persons by MCWP HAZARDS RELEVANT CLAUSES IN THIS STANDARD Overloading or overcrowding of the carrier 5 1 2 5 7 5 10 Annex C Unexpected movement of the carrier in response to external controls or other movements of the machine Excess speed 5 4 1 5 5 5 6 3 Persons falling from the carrier The carrier falling or overturning 5 2 2 3 5 4 1 5 5 5 10 5 11 Excess acceleration or braking of the carrier 5 2 2 4 5 4 3 1 2 5 4 4 26 Due to imprecise markings 5 2 2 7 7 2 5 Safety requirements and or measures 5 1 Structural and stability calculations 5 1 1 General 5 1 1 1 All loads and forces which can occur in any allowed configuration during erection operation out of service dismantling and transfer shall be considered This shall also include inclined or hanging masts 5 1 1 2 The manufacturer shall be responsible for Stability calculations in order to identify the various configurations of the MCWP and the combinations of loads and deflections which together create conditions of instability Structural calculations to evaluate the individual forces and to make allowance for deflections All combinations of forces shall be considered including those which produce the most unfavourable stresses in the components 5 1 2 Loads and forces Th
23. For dated references only the edition cited applies For undated references the latest edition of the referenced document including any amendments applies deleted text EN 294 1992 Safety of machinery Safety distances to prevent danger zones being reached by the upper limbs EN 349 1993 Safety of machinery Minimum gaps to avoid crushing of parts of the human body EN 418 1992 Safety of machinery Emergency stop equipment functional aspects Principles for design EN 614 1 1995 Safety of machinery Ergonomic design principles Part 1 Terminology and general principles EN 953 1997 Safety of Machinery General requirements for the design and construction of guards fixed movable EN 954 1 1996 Safety of Machinery Safety related parts of control systems Part 1 General principles for design EN 982 1996 Safety of machinery Safety requirements for fluid power systems and components Hydraulics EN 60065 1993 Safety requirements for mains operated electronic and related apparatus for household and similar general use EN 60204 1 1992 Safety of machinery Electrical equipment of machines Part 1 General requirements EN 60529 1992 Degrees of protection provided by enclosures IP code EN 60947 5 1 1991 Low voltage switchgear and controlgear Part 5 Control circuit devices and switching elements Section 1 Electromechanical control circuit devices and switching elements EN ISO
24. distance between work See 5 3 4 6 platforms Safety devices against falling Separate arrangements each work platform see 5 5 Instruction handbook Full information shall be given on how to create and dismantle and the use of the multilevel platform NA Not applicable 67 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Annex C normative Requirements for electrical and electronic aspects of overload detecting devices C 1 Reliability C 1 1 Electronic components shall be selected on the basis of the most unfavourable load temperature and tolerance parameters C 1 2 The power consumption of electronic components shall not exceed 66 of the power stated by the manufacturer at an ambient temperature outside the housing of 60 C C 1 3 Detecting devices shall be such that their sound operation is not affected by ambient temperatures between 20 C and 60 C outside the housings Within the range of these temperatures deviation from the set value shall not exceed 3 NOTE The design should take into account that under the circumstances described a higher temperature than 60 C can be reached inside the housing C 1 4 Electronic detecting devices or their components shall be such that their operation is not affected by a Voltage pulses superimposed on the mains voltage Amplitude 1000 V Pulse duration 50 us measured at 50 of the peak value of the voltage pulse Rise time 0 2 to 0 5 us
25. drive a supply disconnecting device able to separate the energy supply from the drive in all poles of phases 5 8 1 4 Safety and control circuits shall be in accordance with EN 60204 1 The safety and control circuits shall be electrically separated from all other circuits 5 8 1 5 Transformers shall be used for supplying control circuits Such transformers shall have separate winding and one side of the control circuit shall be connected to the protective bonding circuit PE see 8 4 and 9 1 1 of EN 60204 1 1992 5 8 1 6 All safety contacts shall be of positive opening operation type complying with the requirements of EN 60947 5 1 5 8 1 7 In the event of a failure of one phase of the supply to the directional control device the machine shall stop 5 8 1 8 Precautions shall be taken to ensure the free and safe movement of any trailing cable throughout the full range of travel of the work platform Where the mast is inclined or where multilevel work platforms to option B annex B are used additional precautions are necessary for example by making the cable follow the incline of the mast by the use of guides or the use of automatic cable reeling drums 38 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 5 8 2 Safety switches The operation of a safety switch shall be by positive separation of the contacts even if the contacts have been welded together Safety switches shall comply with 5 8 1 6 and the conditions set out in table 7
26. intermediate rail but with toeboard height of toeboard Explanatory note to Table 8 The height h and the distance d has been chosen so as to avoid the risk of falling down between the platform and the wall avoid ergonomic hazards and also to limit or reduce the crushing or shearing risk between the guard rail and wall obstacles when the platform is moving along the wall 7 1 2 13 Examinations and tests after major alteration or major repairs to a MCWP already in use Examination and test after major alterations or major repairs to MCWPs already in use shall consist of the following Design check see 6 1 1 Practical tests see 6 1 2 to an extent corresponding to the type of alteration of repair For the purpose of this European Standard major alterations are modifications of the whole or part of the MCWP which affect stability strength of performance 7 1 2 14 Check list A list shall be provided in the instruction handbook which contains all safety relevant parts of the MCWP to be checked after each erection The result of the checks after each erection and the name and address of person s making it shall be recorded in a signed report 7 2 Marking 7 2 1 General The manufacturer shall provide the following information on one or more durable signs or plates mounted in a prominent place on the MCWP in the official language of the country where the MCWP is to be used 7 2 2 Information non varying Th
27. the brake s on its own shall be capable of stopping the machine when travelling at the triggering speed of the overspeed governor with the rated load 5 4 3 1 3 In the case of only one brake all the mechanical components of the brake which take part in the application of the braking action on the drum or disc or drive pinion shall be constructed and installed in such a way that if a failure in one of them occurs sufficient braking shall remain to bring the work platform with rated load to a stop 5 4 3 1 4 The components on which the brake operates shall be positively coupled to a sprocket or drive pinion 5 4 3 1 5 Any machine fitted with an emergency lowering or raising device according to 5 6 shall be capable of having the brake released manually and require a constant effort to keep the brake open 5 4 3 1 6 The action of the brake shall be exerted by compression springs The springs shall be adequately supported and shall not be stressed in excess of 80 of the torsional elastic limit of the material 32 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 5 4 3 1 7 Brake blocks and linings shall be of incombustible material the use of asbestos is forbidden and shall be so secured that normal wear does not weaken their fixings Brakes shall be provided with means of adjustment Brake blocks and linings shall be protected against ingress of lubricants water dust or other contaminants to at least IP 23 see EN 60529 5 4 3 1 8
28. with the designed use of the MCWP 5 10 2 Devices shall be in accordance with EN 60204 1 Systems shall enable periodic functional checks to be carried out to verify that all functions are operating correctly 5 10 3 If interruption of the power occurs all data and calibration of the indicators shall be retained 5 10 4 Limiting and indicating device systems shall fail to a safe condition in which any fault results in a shutdown of the control circuits for normal operation 5 11 Travel limit switches 5 11 1 Terminal stopping switches with contacts according to chapter 3 of EN 60947 5 1 1991 shall be provided and positioned so that they automatically stop the work platform from rated speed at the highest and lowest levels At the lowest level initiation of stopping should occur before contact with the buffer and before contact with the final limit switch At the highest level initiation of stopping shall occur before contact with the final limit switch 5 11 2 An upper final limit switch shall be provided It shall be positioned such that the work platform will come to a complete stop before reaching the top of the mast After triggering the upper final limit switch downward movement of the work platform may be permitted but no further upward movements shall be possible until corrective action has been taken by a competent person A lower final limit switch shall be provided It shall interrupt the electric supply such that the work platfo
29. 009 EN 1495 1997 A2 2009 E The front of the steps or rungs shall be located to give at least 0 15 toe clearance 5 3 3 3 Handholds handrails or similar adequate devices shall be provided to facilitate climbing the access ladder to the work platform 5 3 4 Multilevel work platforms 5 3 4 1 For multilevel work platforms the special requirements as set down in Annex B for options A and B shall be taken into account In addition the following shall apply 5 3 4 2 All additional components that are used with multilevel MCWP shall be calculated according to 5 1 All additional forces imposed upon the main platform and the mast structure shall be calculated according to 5 1 5 3 4 3 Guarding shall be in accordance with 5 3 2 5 3 4 4 Roof protection shall be arranged for the lowest platform in option B to protect persons from falling objects The roof construction for the lowest platform shall Be designed to withstand a load of 100 kg distributed on any area 0 1 m x 0 1 m Be designed so as to prevent the passage of a sphere of 15 mm diameter 5 3 4 5 In option A the two work platforms shall not be separated by more than 3 m between platform floor levels 5 3 4 6 The separation distance between work platforms in option B shall be controlled by safety contact switches This distance shall not be less than 2 5 m in normal operation taking into account levelling inaccuracies 5 3 4 7 Ladders for option A shall comply with 5 3 3
30. 09 E 3 18 N I m C ft tS QO R V RE N 8 Voy fos EE ii Figure 1 Typical single mast MCWP 2T ov Qo as ta ra DA oO mh og er 58 a i Oz m wi TAN l as ZSA ESS ESA V PR FY PANA 5 LAY m LYNG ja SA VIG SE TRY EE LRE fr gt 3 20 3 22 3 29 3 28 3 l eger SS 3 18 Figure 2 Typical twin mast MCWP 10 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 4 List of hazards The list of hazards according to the following tables are based on FP EN ISO 12100 f and Directive 89 392 EEC as amended by 91 368 EEC and 93 44 EEC Tables 1 1 1 2 and 1 3 show the hazards which have been identified and where the corresponding requirements have been formulated in this standard in order to limit the risk or reduce these hazards in each situation A hazard which is not applicable or is not significant and for which therefore no requirements are formulated is shown in the relevant clauses column as NA not applicable 11 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Table 1 1 List of hazards part 1 HAZARDS RELEVANT CLAUSES IN THIS STANDARD 1 Mechanical hazards caused for example by 1 1 Crushing 5 2 1 3 5 3 2 5 4 1 1 2 Shearing 5 2 1 3 5 3 2 5 4 1 1 3 Cutting or severing 5 3 2 5 4 1 1 4 Entanglement 5 4 1 1 5 Drawing in or trapping 5 2 1 3 5 3 2 5 4 1 1 6 Impact 5
31. 09 E 6 1 2 Practical tests Practical tests shall be made to verify that The MCWP is stable The MCWP is structurally sound All functions work correctly and safely These tests shall be made a Inthe case of a freestanding MCWP with the mast erected to its maximum freestanding height b Inthe case of a tied in MCWP with at least two ties in position at their maximum permitted spacings with maximum permitted top overhang MCWPs which are capable of operating in both freestanding and tied in conditions shall be tested in both configurations 6 1 2 1 Stability tests 6 1 2 1 1 The MCWP shall be set up on the maximum allowable inclination of the chassis defined by the manufacturer plus 0 5 with outriggers if fitted used as specified by the manufacturer Test loads shall be applied to represent all the most unfavourable load and force combinations specified in 5 1 5 The test may be carried out on level ground if the test loads are recalculated to include the effects of the maximum allowable inclination of the chassis defined by the manufacturer plus 0 5 The test loads may be applied at any suitable strong point if necessary to avoid overstressing any part of the MCWP The test is to be repeated in all the most unfavourable extended and or retracted positions The untied MCWP is stable if it can come to a stationary condition without turning over while supporting the test load and force combination s 6 1
32. 09 EN 1495 1997 A2 2009 E 5 3 2 Guarding 5 3 2 1 All sides of the main platform and any platform extension shall be designed to be equipped with a guardrail and toeboards which can be securely fastened in position 5 3 2 2 With the exception of a side erected towards a wall see 5 3 2 3 and Table 8 all sides of the platform or any extension shall be equipped with guardrails at least 1 1 m high with an intermediate guardrail not more than 0 5 m from the top guardrail or from the toeboard and toeboards 0 15 m high 5 3 2 3 Guarding the side erected towards a wall depends on the horizontal distance gap between the platform and the wall The following options shall be provided for use in accordance with 7 1 2 12 Figure 9 and Table 8 1 1 1 m high guardrail in accordance with 5 3 2 2 2 0 7 m high guardrail without intermediate rail but with toeboard 3 0 15 m high toeboard 5 3 2 4 The guardrails shall be constructed to withstand concentrated forces of 300 N for each person permitted on the platform applied in the outwards horizontal direction at 0 5 m intervals The top of each guardrail shall also be constructed to withstand a single vertical load of 100 kg applied in the least favourable position but not simultaneously with the horizontal load 5 3 2 5 Chains or ropes shall not be used as guardrails 5 3 2 6 Those sides of the main platform and any extensions immediately adjacent to the mast shall be protected to a height of
33. 2 2 Braking test of the chassis All MCWPs fitted with wheeled chassis shall be subjected to a brake test with the unloaded platform in the worst transfer condition The brake must be able to stop and hold the MCWP in the worst transfer condition Application of the brake must not induce instability 6 1 23 Overload test All movements with the test loads shall be carried out at accelerations and decelerations appropriate with safe control of the load When due to the various combinations of loads or outreaches of a MCWP tests with different test loads are necessary all movements shall be carried out with all test loads except where the most unfavourable conditions can be sufficiently simulated by one performance test During the overload test the test load shall be put into each position which creates maximum stress in any load carrying part of the MCWP During the overload test the brakes shall be capable of stopping and sustaining the test load s After removing the test load s the MCWP shall show no permanent deformation 42 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E The overload moment device if provided shall be checked for compliance with 5 7 3 to 5 7 14 6 1 2 4 Functional tests 6 1 2 4 1 General Functional tests shall demonstrate that The MCWP can operate smoothly for all motions whilst carrying the rated load at the rated speeds All safety devices work correctly Maximum permitted speeds are not
34. 4 4 1 7 Stabbing or puncture NA 1 8 Friction or abrasion NA 1 9 High pressure fluid ejection 5 9 7 5 9 8 5 9 9 5 9 10 1 10 Ejection of parts 5 2 1 4 5 2 1 5 1 11 Loss of stability 5 1 5 5 2 2 4 5 2 2 5 1 12 Slip trip and fall 5 2 2 1 5 3 1 2 Electrical hazards 2 1 Electrical contact 5 8 7 1 2 7 2 2 Electrostatic phenomena NA 2 3 Thermal radiation NA 2 4 External influences 5 7 15 Annex C 3 Thermal hazards Relevant but not dealt with 4 Hazards generated by noise Relevant but not dealt with 5 Hazards generated by vibration 5 1 2 3 2 6 Hazards generated by radiation NA 7 Hazards generated by materials and substances processed used or exhausted by machinery 7 1 Contact with or inhalation of harmful fluids gases mists fumes and dusts 7 2 Fire or explosion Biological and microbiological Hazards generated by neglecting ergonomic principles in machine design continued 12 10 10 1 10 2 10 3 10 4 10 5 11 8 3 11 1 11 2 11 3 11 4 11 5 11 6 11 7 11 8 11 9 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Table 1 1 List of hazards part 1 concluded HAZARDS Unhealthy postures or excessive efforts Inadequate consideration of human hand arm or foot leg anatomy Inadequate area lighting Mental overload or underload stress Human error Hazard combinations Hazards caused by failure of energy supply breaking down of machinery parts and other functional disorders Failure of energy su
35. 5 1 2 5 5 The exposed area of one person standing on a work platform behind an imperforate section of fencing 1 1 m high is 0 35 m with the centre of area 1 45 m above the work platform floor 5 1 2 5 6 The number of persons directly exposed to the wind is calculated as a The length of the side of the work platform exposed to the wind rounded to the nearest 0 5 m and divided by 0 5 m or b The number of persons allowed on the work platform if less than the number calculated in a 5 1 2 5 7 If the number of persons permitted on the work platform is greater than in 5 1 2 5 6 a a reducing coefficient of 0 6 may be applied to the extra number of persons 5 1 2 5 8 The wind force on exposed equipment and material on the work platform is calculated as 3 of the mass T acting horizontally at a height of 1 0 m above the work platform floor 5 1 2 6 Loads and forces occurring during transfer conditions Inertia forces plus any load permitted by the manufacturer on the work platform shall be taken into account when the MCWP is subject to transfer conditions 5 1 2 7 Erection and dismantling loads The load for which the MCWP has been designed during erection and dismantling Erection load may be higher than rated load If the handling crane as carried in 5 1 2 2 6 is used during erection and dismantling of the MCWP then the crane s mass and the rated load shall together be treated as part of the erection load 5 1 2 8 Out of service
36. 7 8 9 20 1 05 1 06 1 06 1 06 1 07 1 07 1 07 1 08 1 08 1 08 30 1 09 1 09 1 10 1 10 1 10 1 11 1 11 1 12 1 12 1 13 40 1 13 1 14 1 14 1 15 1 16 1 16 1 16 1 17 1 18 1 18 50 1 19 1 20 1 20 1 21 1 22 1 22 1 23 1 24 1 25 1 25 60 1 26 1 27 1 28 1 29 1 30 1 31 1 32 1 33 1 34 1 35 70 1 36 1 37 1 38 1 40 1 41 1 42 1 44 1 45 1 46 1 48 80 1 49 1 51 1 53 1 54 1 56 1 58 1 60 1 62 1 64 1 66 90 1 68 1 70 1 73 1 75 1 78 1 80 1 83 1 86 1 89 1 92 100 1 95 1 99 2 02 2 06 2 10 2 14 2 18 2 23 2 27 2 31 110 2 35 2 39 2 44 2 48 2 53 2 57 2 62 2 66 2 71 2 75 120 2 80 2 85 2 89 2 94 2 99 3 04 3 09 3 14 3 18 3 23 130 3 29 3 34 3 39 3 44 3 49 3 54 3 60 3 65 3 70 3 76 140 3 81 3 86 3 92 3 97 4 03 4 09 4 14 4 20 4 26 4 32 150 4 37 4 43 4 49 4 55 4 61 4 67 4 73 4 79 4 85 4 91 160 4 98 5 04 5 10 5 16 5 23 5 29 5 36 5 42 5 49 5 55 170 5 62 5 68 5 75 5 82 5 89 5 95 6 02 6 09 6 16 6 23 180 6 30 6 37 6 44 6 51 6 58 6 65 6 72 6 80 6 87 6 94 190 7 02 7 09 7 17 7 24 7 32 7 39 7 47 7 55 7 62 7 70 200 7 78 7 85 7 93 8 01 8 09 8 17 8 25 8 33 8 41 8 49 210 8 57 8 65 8 74 8 82 8 90 8 99 9 07 9 15 9 24 9 32 220 9 41 9 49 9 58 9 67 9 75 9 84 9 93 10 02 10 10 10 19 230 10 28 10 37 10 46 10 55 10 64 1073 10 83 10 92 11 01 11 10 240 11 20 11 29 11 38 11 48 11 57 1167 11 76 11 86 11 96 12 05 58 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Table A 7 values for S 355
37. 71 13 05 13 39 13 74 160 15 17 15 55 15 94 16 33 16 72 14 09 14 44 14 80 15 16 15 53 170 17 12 17 53 17 94 18 35 18 77 15 90 16 28 16 66 17 04 17 43 180 19 20 19 63 20 06 20 50 20 94 17 83 18 22 18 63 19 03 19 45 190 21 39 21 84 22 30 22 76 23 23 19 86 20 28 20 71 21 14 21 57 200 23 70 24 18 24 66 25 14 25 63 22 01 22 45 22 90 23 35 23 80 63 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Table A 12 values for aluminium alloys 3 4 and 5 Alloy 3 and 5 Alloy 4 yield strength f 200 N mm yield strength fy 160 N mm 0 2 4 6 8 0 2 4 6 8 20 1 00 1 00 1 02 1 04 1 06 1 00 1 00 1 02 1 04 1 05 30 1 08 1 10 1 13 1 15 1 18 1 08 1 10 1 13 1 15 1 18 40 1 21 1 24 1 28 1 31 1 34 1 20 1 23 1 25 1 27 1 30 50 1 38 1 42 1 47 1 52 1 57 1 33 1 37 1 41 1 45 1 49 60 1 63 1 71 1 82 1 94 2 06 1 53 1 58 1 62 1 66 1 71 70 2 18 2 30 2 43 2 57 2 70 1 76 1 82 1 87 1 96 2 06 80 2 84 2 99 3 14 3 29 3 44 2 17 2 28 2 39 2 50 2 62 90 3 60 3 76 3 93 4 10 4 27 2 74 2 87 2 99 3 12 3 25 100 4 44 4 62 4 81 4 99 5 18 3 39 3 52 3 66 3 80 3 95 110 5 38 5 57 5 78 5 98 6 19 4 10 4 25 4 40 4 56 4 71 120 6 40 6 61 6 83 7 06 7 28 4 88 5 04 5 21 5 38 5 55 130 7 51 7 74 7 98 8 22 8 46 5 72 5 90 6 08 6 26 6 45 140 8 71 8 96 9 22 9 47 9 73 6 64 6 83 7 02 7 22 7 42 150 10 0 10 2 10 5 10 8 11
38. 85 70 200 120 90 80 2 145 90 55 40 165 100 60 45 180 110 65 50 3 115 70 55 40 130 80 60 45 110 90 65 40 4 95 55 35 25 105 60 40 30 115 65 45 30 5 120 70 55 45 135 80 65 40 150 90 70 55 6 70 45 55 45 80 50 65 50 90 55 70 55 7 70 45 55 45 80 50 65 50 90 55 70 55 8 55 35 35 30 65 40 40 35 70 45 45 40 9 45 30 35 30 50 35 40 35 55 40 45 40 10 45 30 35 30 50 35 40 35 55 40 45 40 When selecting the materials special requirements should be taken into account e g condition after heat treatment and ageing weldability use of the appliance in extreme climatic zones for other material characteristics consult national standards A 2 1 2 Combined stresses Load bearing parts and butt welds O 0 0 0 x0 3xT A 2 1 3 Elastic stability Aluminium has a very low modulus of elasticity and a low shear modulus 1 3 of the values of steel Therefore the problems with the elastic stability are much more obvious compared with steel structures Crippling buckling torsion buckling etc should be checked Very slender constructions should be checked according to the theory of the second order A 2 1 3 1 Crippling omega method Symbols slenderness crippling factor 62 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E factors already calculated for aluminium see table A 11 to A 14 A 2 1 3 2 Limit state method The deflection of a construction should be taken into co
39. EES ADEA S A DNA 50 Annex A informative Structural calculations rrnnnnvorrnnnnvonrnnnnvnnnnnnnvnnennnnvnnennnnvnnennnnvenennnnennennnnnnnnnnnennennnn 52 Annex B normative Special requirements for multilevel work platformS rrravrrnnnvnnnnvvnnnnvnnnnnvnnnnnnnnnnenn 66 Annex C normative Requirements for electrical and electronic aspects of overload detecting fo AT e C PEE AE EE E A PE E E AE E TE A E EEE EAT E T 68 Annex ZA informative Relationship between this European Standard and the Essential Requirements of EU Directive 98 37 EC MJ rnmnnnnnnvnnnnnnvnnnvnnvnnvnnnvnnvnnvnnnnnnnnnnennennnnnnennnnnnnnenvennnnenen 71 Annex ZB informative Relationship between this European Standard and the Essential Requirements of EU Directive 2006 42 EC Mf ernnnnnnnnnvnnnnnvnnnnnnnnnvvnnnnvnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnnnnnnnennn 72 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Foreword This document EN 1495 1997 A2 2009 has been prepared by Technical Committee CEN TC 98 Lifting platforms the secretariat of which is held by DIN This European Standard shall be given the status of a national standard either by publication of an identical text or by endorsement at the latest by January 2010 and conflicting national standards shall be withdrawn at the latest by January 2010 This European Standard was approved by CEN on 21 April 1997 and includes Corrigendum 1 issued by CEN on 11 December 1997 Ame
40. EUROPEAN STANDARD EN 1495 1997 A2 NORME EUROP ENNE EUROPAISCHE NORM Japans ICS 53 020 99 Supersedes EN 1495 1997 English Version Lifting platforms Mast climbing work platforms Mat riels de mise niveau Plates formes de travail se Hebeb hnen Mastgef hrte Klettero hnen d pla ant le long de m t s This European Standard was approved by CEN on 21 April 1997 and includes Corrigendum 1 issued by CEN on 11 December 1997 Amendment 1 approved by CEN on 1 September 2003 and Amendment 2 approved by CEN on 19 June 2009 CEN members are bound to comply with the CEN CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up to date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member This European Standard exists in three official versions English French German A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions CEN members are the national standards bodies of Austria Belgium Bulgaria Cyprus Czech Republic Denmark Estonia Finland France Germany Greece Hungary Iceland Ireland Italy Latvia Lithuania Luxembourg Malta Netherlands Norway Poland Portugal Romania Slovakia Slo
41. Safety of machinery Rules for the drafting and presentation of safety standards has been used as a guide in the preparation of this standard This standard has been prepared to be a harmonized standard to provide one means of conforming with the essential safety requirements of the Machinery Directive The extent to which hazards are covered is indicated in the scope of this standard In addition lifting equipment shall comply as appropriate with EN ISO 12100 for hazards which are not covered by this standard 1 Scope 1 1 This standard specifies the special safety requirements for Mast Climbing Work Platforms MCWP which are temporarily installed and are manually or power operated and which are designed to be used by one or more persons from which to carry out work The vertical moving components work platform are also used to move those same persons and their equipment and materials to and from a single boarding point These restrictions differentiate MCWPs from Builder s hoists The standard can also be used for permanently installed MCWP 1 2 This standard is applicable to work platforms elevated by rack and pinion and guided by and moving along their supporting masts where the masts may or may not require lateral restraint from separate supporting structures 1 3 This standard is applicable to any combination of the following alternatives One or more masts Mast tied or untied Mast of fixed or variable length
42. able components which have safety related functions Troubleshooting information Electrical Hydraulic Pneumatic schematic diagrams Parts lists diagrams List of maintenance work to be carried out only by specially trained persons together with a definition of that training The manufacturer shall stress that regular maintenance shall include visual inspection and necessary functional test and maintenance measures Special attention shall be given to the inspection of load bearing parts with attachments driving and stopping devices operating and safety devices racks and pinions etc 7 1 2 11 Periodic examinations and test on MCWP The instruction handbook shall state that the frequency and extent of periodic examinations and tests depends on national regulations manufacturer s requirements operating conditions and the frequency of use It is normally not necessary to dismantle parts at periodic examinations unless there are any doubts in relation to reliability and safety The removal of covers the exposure of observation apertures and bringing the MCWP to the transport position are not considered to be dismantling The instruction handbook shall state the maximum time between periodic examinations and tests Such examinations and tests shall at least consist of the following A visual examination of the structure with special attention to corrosion and other damage of load bearing parts and welds An examinati
43. all be fitted with means which permit the manually controlled emergency lowering of the work platform under certain circumstances Such circumstances shall include electrical failures but may exclude those mechanical failures which would prevent the safe movement of the work platform It is intended that such means shall offer the possibility of the emergency lowering of the work platform such that persons can leave it dependent upon suitable site conditions being available 35 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 5 6 2 The means shall a Be operated from a safe but easily accessible location on the work platform which also permits the best possible view of the travel area b Have controls which are adequately shrouded or otherwise arranged to prevent as far as possible accidental operation from any cause c Only be operable by a hold to run control which permits lowering of the work platform only as long as the control is manually held in a set position d The manual force required on the control shall be no more than 400 N e Require the temporary release of the braking system see 5 4 3 f Permit the immediate automatic re application of the braking system upon release of the emergency lowering controls g Permit lowering whilst the work platform is carrying 1 1 x rated load h Allow that no part of the work platform shall exceed 5 from the horizontal according to 5 3 1 1 during emergency lowering
44. anged in a way to provide the operator with the best possible view of the travel area and to ensure safe movement of the platform A warning sign shall be mounted on any movable station stating that vertical operation of the work platform from places other than the work platform itself is forbidden 5 12 6 Emergency stop controls shall be arranged on the platform in accordance with EN 60204 1 5 12 7 On starting or restoration of the power after failure of the power supply no further movement shall occur without the intervention of the operator 5 12 8 Controls shall conform to EN 614 1 whilst taking into account the possibility of the operator wearing gloves 6 Verification of the safety requirements and or measures 6 1 Examinations and tests for each new model of MCWP 6 1 1 Design check The design check shall verify that the MCWP is designed in accordance with this standard It will include inter alia the check of the following documents a Drawings containing the main dimensions of the MCWP b Description of the MCWP with necessary information about its capabilities c Information about the materials used d Diagrams of the electrical hydraulic and pneumatic circuits e Operating instructions The above documents shall give all necessary information to enable The stability calculations to be checked see 5 1 5 The structural calculations to be checked see 5 1 4 41 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 20
45. ans shall be designed to ensure that environmental conditions cannot affect their safe operation 5 5 2 Safety gear and overspeed governor 5 5 2 1 Safety gear The safety gear specified in 5 5 1 1 a shall a Be independent of the drive machinery other than the rack b Be always fully operational in normal use erecting maintenance and dismantling c Not be dependent on energizing or maintaining an electrical or other auxiliary circuit d Be accessible for inspection maintenance and testing without major dismantling e Be designed using a safety factor of 2 5 based on the ultimate strength of the material and the highest force which can occur in the device with rated load and max possible speed see 5 5 1 1 f Be able to be tested by a competent person remote from the work platform so that persons are not exposed to danger 9 Not use any part of the safety gear for guidance of the work platform h Positively actuate on the masts or racks and shall be tripped by an overspeed governor see 5 5 2 2 i Be designed so that all control circuits for normal operation will be automatically interrupted by a safety switch before or at the time the safety gear is applied j Be designed so that the method of release of the safety device will require the intervention of a competent person in order to return the MCWP to normal operation k Be designed such that the braking effect of the safety gear shall increase progressively from the po
46. at least 2 m to prevent access to the mast Apertures shall comply with EN 294 5 3 2 7 If extensions of the work platform are positioned between the mast and the building then means shall be provided to prevent travel of the work platform with the extension in place 5 3 2 8 Where the platform extension is not flush with the main platform the unprotected opening between the two levels shall be guarded at least with a toeboard of 0 15 m height located on the lower level 5 3 2 9 When it is foreseen e g maintenance that the fixed guard rails will be removed regularly then the fastenings shall remain attached to the guard rail segments or to the platform 5 3 3 Access 5 3 3 1 At least one access gate shall be provided and it shall not open outwards All access gates shall be so constructed as to either close automatically or be electrically interlocked to prevent operation of the work platform unless they are closed Inadvertent opening of the access gate shall not be possible Chains or ropes shall not be used as access gates 5 3 3 2 When the distance between the access level and the floor of the work platform in the access position exceeds 0 5 m the MCWP shall be equipped with an access ladder or stairs symmetrical with the access gate The steps or rungs shall be divided equally over the distance between the access level and the floor of the work platform and in no case shall the step rise be more than 0 3 m 29 BS EN 1495 1997 A2 2
47. below Table 7 Conditions for use of electric switches Clause Devices checked Switch EN 954 1 Category of control system 5 3 4 6 Separation distance switch sc 1 5 5 2 1 i Operation of overspeed safety sc 1 devices 5 11 1 Terminal stopping switch ssr B 5 11 2 Final limit switch sc 1 Abbreviations ssr safety switch self resetting sc safety switch in a safety circuit 5 8 3 Control system The control system shall comply with EN 954 1 category 1 unless otherwise stated in table 7 This includes any control system using electrical or hydraulic power In redundancy type circuits and diversity type circuits measures shall be taken to limit as far as possible the risk of defects occurring simultaneously in more than one circuit arising from a single cause 5 9 Hydraulic system 5 9 1 The hydraulic system shall be designed so that the safety requirements for fluid power systems and components in EN 982 are met 5 9 2 It shall be the responsibility of manufacturers to determine by calculations and test the working pressures which can occur in any part of the circuits 5 9 3 Each hydraulic circuit shall be provided with a connection for a pressure gauge 5 9 4 The design of the hydraulic system shall enable trapped air to be vented 5 9 5 Any hydraulic tank open to atmosphere shall be equipped with an air breathing filter 5 9 6 Each hydraulic tank shall be equipped with a device indicatin
48. bles and information plates shall also be checked Keep the work platform clean from waste building materials and of debris snow etc Before any work is commenced the operator shall visually check the outriggers and any timber or other packing on the ground shall be visually checked to ensure that it is in good order Ensure that tools and other objects do not project outside the perimeter of the MCWP During the work the operator shall carefully follow the operation instructions At the end of the work period the platform shall be brought into the out of service position and it shall be isolated to prevent unauthorised operation In the event of a fault with the MCWP which can jeopardise safety the operator shall immediately immobilise the MCWP and notify a responsible person Incase of emergency the operator must follow the relevant instruction in the user manual 7 1 2 10 Maintenance instructions These shall include the following Schedule of regular maintenance together with required adjustments and tolerances and the required intervals and personnel skill requirements 47 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Information on precautions to be taken against hazards during maintenance Regular replacement of specific parts including discard criteria Information on the replacement of safety critical parts by identical components Information into how to seal adjust
49. chassis and work platform shall be avoided by providing safe clearances or adequate guarding See EN 349 and EN 953 A When it is foreseen e g for maintenance that the fixed guard will be removed regularly then the fastenings shall remain attached to the guard or to the machinery If safe clearance or adequate guarding is not possible then an acoustic warning device shall be fitted to the work platform which at least gives a continuous warning when the work platform is moving within 2 5 m of the chassis Trapping crushing and shearing points need only be considered at those areas within reach of persons on the work platform or standing adjacent to the MCWP at ground level or at other points of access 5 2 1 4 Locking pins shall be designed to be mechanically secured against unintentional disengagement and loss e g split pin locking nut whilst in position In addition they shall be provided with means to secure against unintentional loss when out of use e g captive chain 5 2 1 5 Where compression springs are used for a safety function they shall be guided with secured ends Their design shall be such that if they break then the parts cannot coil into each other 5 2 1 6 The design of all components that have to be handled during erection e g mast sections platform components erection cranes shall have their mass assessed against manual handling Where the permissible mass for normal handling is exceeded the manufacturer shall giv
50. confers within the limits of the scope of this standard a presumption of conformity with the relevant Essential Requirements except ESR 1 5 8 and 1 7 4 2 u of that Directive and associated EFTA regulations WARNING Other requirements and other EU Directives may be applicable to the product s falling within the scope of this standard 72 This page deliberately set blank BS EN 1495 1997 A2 2009 BSI Group Headquarters 389 Chiswick High Road London W4 4AL UK Tel 44 0 20 8996 9001 Fax 44 0 20 8996 7001 www bsigroup com standards BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible the identity of which can be found on the inside front cover Tel 44 0 20 8996 9000 Fax 44 0 20 8996 7400 BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest ed
51. ction Low accuracy fixed connection High accuracy fixed connection 0 1 3x do oL 1 5x do oL 2 0x do Table A 4 Permissible bearing pressure N mm Load case A B C Steel grade 235 275 355 235 275 355 235 355 Loose connection 204 238 308 229 268 346 244 286 369 Low accuracy fixed connection 235 275 335 264 309 399 282 330 426 High accuracy fixed connection 313 367 473 352 412 532 376 440 568 A 1 1 4 Combined stresses Load carrying parts and butt welds o 0 02 0 X0 3X7 Bolts pin and fillet welds O 0 02 0 X0 2x7 A 1 1 5 Elastic stability A 1 1 5 1 Crippling Symbols slenderness specific slenderness crippling factor compressive force N area cm bending moment Ncm section modulus compressive edge cm section modulus tensile edge cm permissible stress N cm 55 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E The crippling factor is defined in the following way MEN IT E 1 For O lt A s1 195 w Fs 1 0 195x 0 185xA For A gt 1 195 1 465 A factor already calculated for non alloy structural steels see table A 5 to A 7 The highest permitted slenderness is 250 The following conditions should be fulfilled ax 09x lt o A W c F 300 2A M x x lt o A 1000 W t A 1 1 5 2 Buckling Symbols t thickness of pla
52. e business name and the full address of the manufacturer or his authorised representative Country of manufacture Model designation Serial or fabrication number the year of construction that is the year in which the manufacturing process is completed Vertical travel speed m s 50 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Transfer travel speed m s Out indoor installation Maximum allowable freestanding height m in and out of service Limiting windspeed during erection dismantling Maximum allowable windspeed in service out of service m s Hydraulic supply information if an external hydraulic power supply is used Pneumatic supply information if an external pneumatic power supply is used Electrical supply information if an external electric power supply is used All guardrails to be in place at all times except for loading and unloading at the access level 7 2 3 Information varying 7 2 3 1 Capacity A load diagram showing the rated loads for particular main platform and platform extension configurations and any limitation as to load distribution This shall be derived from the information presented by the manufacturer according to 7 1 2 2 The load diagram shall take the form of a durable sign or plate and shall be the responsibility of the user The manufacturer shall provide a means of mounting the load diagram 7 2 3 2 Additional technical
53. e following loads and forces shall be taken into account 5 1 2 1 Structural loads The masses of the components of the MCWP when they are not moving are considered to be static structural loads The masses of the components of the MCWP when they are moving are considered to be dynamic structural loads 15 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 5 1 2 2 Rated load 5 1 2 2 1 The rated load for design purposes is m n X Mp T 2 x Me where m rated load kg Mp 80 kg mass of each person Me 40 kg mass of personal equipment for the first two persons only T mass kg of material and equipment on the work platform excluding personal equipment n number of persons on the work platform The mass of persons and the mass of equipment and material shall act simultaneously The minimum number of persons shall be Two 2 for single mast platforms and four 4 for multiple mast platforms The mass of the personal equipment me shall be assumed to act on the point coincident with each of the two persons which give the highest stresses 5 1 2 2 2 The mass of each person is assumed to act as a point load on the MCWP at a horizontal distance 0 1 m from the upper inside edge of the top guard rail The distance between the point loads shall be 0 5 m see figure 3 as an example 5 1 2 2 3 The mass T shall be evenly distributed over the whole area of the main platform giving a specific load per length t The c
54. e recommendations in the instruction handbook concerning suitable lifting equipment 5 2 1 7 Attachment of lifting equipment Where components are erected by means of lifting equipment provision shall be made for adequate attachment of the lifting equipment This shall ensure that the component is securely attached and lifted in the correct attitude for assembly 5 2 1 8 Lifting equipment Any dedicated lifting equipment shall be designed in accordance with ISO 8686 1 and ISO 4301 1 and shall not impose loads on the MCWP structure for which the MCWP was not designed 5 2 2 Base frame and chassis 5 2 2 1 General If chains or belts are used in drive systems inadvertent movements of the chassis shall be automatically prevented if failure of a chain or belt occurs 25 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E If powered and manual drive systems are provided for the same movement interlocks shall prevent both systems from being engaged at the same time After failure of the power supply no inadvertent movement shall occur Walkways on the base frame or chassis shall be equipped with a slip resistant surface 5 2 2 2 Base frame The base frame shall be equipped with fixings for safe and secure attachment of other parts of the construction such as mast and outriggers 5 2 2 3 Chassis The chassis shall be equipped with fixings for safe and secure attachment of other parts of the construction such as mast and outriggers
55. entre of gravity of the mass T shall be assumed to act on a point 0 15 B where B is the width of the main platform away from the longitudinal centre line of the main platform on the side giving the highest stresses See figure 4 Calculations must allow for the possibility that a reduced load giving an unbalanced loadcase may result in higher stresses in some parts of the MCWP than a balanced rated load case would give For single mast machines the bending moment M on masts and platforms shall be calculated according to formula 1 where Lmax is the greater of the distances L and Lz in figure 5 For multiple mast machines the bending moment M on masts and platforms shall be calculated according to formulas 2 3 4 and figure 6 The factors 1 15 and 1 2 are used in the formulas 1 2 3 4 in order to cover the situations in use where instead of a uniformly distributed load a concentration of the same load is placed elsewhere within that individual length 16 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Dimensions in metres Figure 4 Eccentric loading normal to the centre line 17 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 3 T Specific load t L XL X115 Formula 1 Mmax gt Figure 5 Loading in the longitudinal direction Single mast machines T Specific load t L Formulas tx L x115 Ne _ tx 3 X1 2 38 _ tx 13x15 gt Figure
56. fety devices against falling see 5 5 Allow for any extra load Instruction handbook Full information shall be given on how to erect and dismantle and the use of the multilevel platform NA Not applicable 66 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Table B 2 OPTION B Two or more Work Platforms separately driven on common masi s Requirements Single Mast Multiple Masts Allow for the effect on calculations Independent calculation of each work platform Rated load Allow for additional forces on mast Yes Yes and mast ties Allow for additional in amp out of Yes Yes service wind forces Allow for the effect on stability Yes Yes Guard rails and toeboards Yes Yes Ladder No See 5 3 4 7 Trap door NA NA Fixings and stability of subsidiary NA NA work platform in relation to the primary work platform Supported on primary work NA NA platform or on platform extensions Platform levelling Separate arrangements for each platform Controls Separate controls for each platform Protection from falling objects Lower work platform s must be protected from upper work platform See 5 3 4 4 and Instruction Manual Emergency lowering Standard arrangements Buffers Standard buffers according to 5 4 4 Upper travel limit switch Separate switches for each platform Lower travel limit switch Separate switches for each platform Separation
57. g conditions see 5 6 Be always fully operational in normal use erection maintenance and dismantling Be able to be tested by a competent person such that each individual brake can be tested separately Be accessible for inspection maintenance and functional testing of the system without major dismantling When activated interrupt automatically the control circuit for normal use Have each drive unit designed using a safety factor of 2 5 based on the ultimate strength of the material and the highest force which can occur in the drive with rated load and max possible speed Be designed and manufactured in accordance with 5 10 where appropriate Detect malfunctions in each drive unit which endanger proper function These shall at least indicate a loss of mechanical integrity which results in a differential in the current demand between each drive unit exceeding 25 of the full load current Have each individual drive unit fitted with a mechanical device that automatically prevents the work platform exceeding 0 4 m s descent speed Each such speed limiting device when acting on its own shall be capable of carrying the work platform and its rated load in the most disadvantageous configuration Each device shall also be designed using a safety factor of at least 2 5 based on the basic ultimate strength of the material and the highest force which can occur 5 6 Means for emergency lowering and raising the work platform 5 6 1 The MCWP sh
58. g the fluid level and marked with the maximum and the minimum level 5 9 7 The hydraulic system shall be fitted with a pressure relief valve in order to provide protection against excess pressure It shall be adjustable sealed and designed so that the setting shall only be possible with the aid of special tools The valve shall be adjusted for a pressure which is no more than 20 above the pressure in operation with the rated load If different maximum pressures are used in the hydraulic system then a corresponding number of pressure relief valves shall be provided 39 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 5 9 8 Pressurised parts of the hydraulic system which may be subjected to the maximum pressure permitted by the pressure relief valve shall be designed to withstand at least twice that pressure without permanent deformation 5 9 9 The bursting pressure of hoses including fittings which may be subjected to the maximum pressure permitted by the pressure relief valve shall be not less than four times that pressure 5 9 10 All other parts of the hydraulic system shall be designed to withstand at least the maximum pressure to which they will be subjected 5 9 11 Pilot operated control valves shall be so designed and installed that they fail to safety in the event of power failure 5 10 Special requirements for safety devices depending on auxiliary circuits and for overload moment devices 5 10 1 The device shall be compatible
59. information Outrigger arrangements and required ground bearing pressure 51 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Annex A informative Structural calculations General The calculations should conform to the rules and principles of applied mechanics and strength of materials If special formulae are used the sources should be given if they are generally available Otherwise the formulae should be developed from first principles so that their validity can be checked A 1 In the absence of an EN standard for design calculation the following guidelines may be used for the design of steel structures A 1 1 Permissible stresses Symbols fy yield strength N mm Fu ultimate strength N mm E 210 000 modulus of elasticity N mm G E 2x 1 v shear modulus N mm v 0 3 Poissons ratio 5 elongation at failure on gauge length of 5 times the diameter of the original cross section S Safety factor on yield strength A 1 1 1 Non alloy structural steels according to EN 10025 Table A 1 Nominal values of material properties Type Yield 1 Ultimate 2 Strength f Strength fu N mm N mm 235 235 360 Fe360 275 275 430 Fe430 355 355 510 Fe510 1 Standard value for smaller thickness 2 Minimum 52 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E A 1 1 1 1 Permissible stresses for non alloy structural steels 00 fyS Tab
60. ings shall be positioned to be in full view of persons on the work platform 5 7 13 The overload moment detector and indicator shall be arranged so that their operation but not necessarily their accuracy can be checked without applying loads to the work platform 5 7 14 The overload moment detector and indicator shall comply with 5 10 5 7 15 The electrical and electronic requirements for overload detection devices are given in Annex C 5 7 16 Devices according to 5 7 1 to 5 7 15 are not required if the following demands are met All design calculations shall be based on the loads mp m and T that are related to the rated load m in 5 1 2 2 1 increased by a further factor f as a function of m according to figure 8 37 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 1 15 gt 500 1500 m Key f factor m rated load in kg Figure 8 Brakes and safety devices means shall be calculated with the same loads as mentioned in the first paragraph For stability calculations the increased loads shall be considered in case they give overturning moments 5 8 Electrical systems 5 8 1 General 5 8 1 1 Electrical and electronic installations and their appliances shall be in accordance with EN 60204 1 which applies in full 5 8 1 2 At the chassis or base there shall be mounted a main switch according to EN 60204 1 at an easily accessible position 5 8 1 3 Any drive system shall have within a distance of not more than 2 m from the
61. int of tripping of the overspeed governor to the point of bringing the platform to rest 5 5 2 2 Overspeed governor 5 5 2 2 1 The overspeed governor shall trip at a speed defined by the manufacturer but in no case shall the work platform exceed the speed stated in 5 5 1 1 5 5 2 2 2 Overspeed governors shall operate mechanically and shall either be driven by the safety gear pinion or by rope 34 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 5 5 2 2 3 f ropes and pulleys are used for overspeed governors The rope diameter shall not be less than 6 mm The ratio between the diameters of the ropes and the rope pulleys shall not be less than 20 The ratio between the highest pull force which could occur in the rope and the minimum breaking force of the rope shall not be less than 8 The minimum generated force shall not be less than 300 N and not less than twice the force necessary to engage the safety gear 5 5 3 System involving two or more drive units fitted to each mast The system specified in 5 5 1 1 b shall a Have at least 2 drive units fitted to each mast where each drive unit shall have its own brake with each brake unit being completely independent and each being positively but separately connected to the rack and pinion system Be such that each brake on its own shall be capable of stopping and sustaining the work platform when carrying 1 1 x rated load from the max possible speed even under emergency lowerin
62. itions of standards Buying standards Orders for all BSI international and foreign standards publications should be addressed to Customer Services Tel 44 0 20 8996 9001 Fax 44 0 20 8996 7001 Email orders bsigroup com You may also buy directly using a debit credit card from the BSI Shop on the Website http www bsigroup com shop In response to orders for international standards it is BSI policy to supply the BSI implementation of those that have been published as British Standards unless otherwise requested Information on standards BSI provides a wide range of information on national European and international standards through its Library and its Technical Help to Exporters Service Various BSI electronic information services are also available which give details on all its products and services Contact Information Centre Tel 44 0 20 8996 7111 Fax 44 0 20 8996 7048 Email info bsigroup com Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards For details of these and other benefits contact Membership Administration Tel 44 0 20 8996 7002 Fax 44 0 20 8996 7001 Email membership bsigroup com Information regarding online access to British Standards via British Standards Online can be found at http www bsigroup com BSOL Further information about BSI is available on the BSI website at http www bsigroup com Copyright
63. le A 2 Permissible stresses for non alloy structural steels N mm Load case A B G 2 N mm S 1 5 1 33 1 25 Steel grade 235 275 355 235 275 355 235 275 355 Basic material and butt weld Oa 09 157 183 237 176 206 266 188 220 284 Ta 00 N3 90 106 137 102 119 154 109 127 164 Fillet weld Oa 09 157 183 237 176 206 266 188 220 284 Ta 00 N2 111 130 167 125 146 188 133 156 201 The indicated permissible stresses are valid up to a thickness of 40 mm In the case of larger thicknesses the corresponding value of fy should be taken into consideration When selecting the materials special requirements should be taken into account e g Weldability Use of the appliance in extreme climatic zones A 1 1 2 Other steel grades Depending on the minimum strength f and the elongation at failure 5 5 the following condition exists 510 lt fy lt 590 55x fy 2 10800 510 lt fy 55x fu gt 9800 If these conditions are fulfilled the following applies fy 0 8 x fu If the conditions are not fulfilled a reduced yield strength fy should be defined with the factor r which is applied to the ultimate strength f 2600 f 6 65 9600 1 28 lt r lt 1 44 fy fa P Values of r to be used should be not less than 1 28 and not more than 1 44 53 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Based on the lower value of the yield strength fy o
64. ly with 5 6 1 and 5 6 2 and that the work platform speed with 1 1 x rated load can be controlled according to the user instruction Whilst lowering permit the speed to increase further to the point where the safety gear operates according to 5 6 3 b For work platforms equipped with means according to 5 5 1 1 b check that the controls comply with 5 6 1 and 5 6 2 and that the lowering and raising if applicable speed does not exceed 0 3 m s with 1 1 x rated load on the work platform 43 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 7 Information for use 7 1 Instruction handbook 7 1 1 Comprehensive information Manufacturers or suppliers of MCWP shall supply in one of the official languages of the country where the MCWP is to be used sufficient comprehensive information for the safe use of the MCWP Presentation of this information shall comply with Clause 6 of EN ISO 12100 2 2003 7 1 2 Content of the instruction handbook The manufacturer and or importer supplier shall make available to the user an instruction handbook containing at the least information about the following topics 7 1 2 1 General information Manufacturer s or supplier s name and address Country of manufacture Model designation Serial or fabrication number Year of manufacture Vertical travel speed m s Horizontal transfer speed m s _ Outdoor indoor installation Maximum allowable freestanding heigh
65. n and indication are not possible for different configurations then a work platform configuration selector shall be provided which allows a clear classification of the chosen setting in comparison with actual work platform configuration This can be done by either 1 A clear sign of the respective platform configuration or 2 A code at each setting In this case a clear reference shall be given to the explanation of the code on a separate code or configuration sign 5 7 6 The number of possible selections permitting use of the work platform shall not exceed the number of configurations for the work platform 5 7 7 The selector shall be so situated or protected so as to be inaccessible to unauthorised persons 5 7 8 The overload moment detector shall be triggered before reaching a load moment of 1 1 x rated load moment and once triggered shall continuously isolate the controls concerned until the overload moment has been removed 5 7 9 The design and installation of overload moment detectors and indicators shall take into account the need to test the MCWP with overloads without dismantling and without affecting the performance of the detector or indicator 5 7 10 The overload moment indicator shall continuously visually and audibly warn the operator and other persons in the vicinity of the work platform when the overload moment detector is activated 5 7 11 No provision shall be made for the user to cancel the warning 5 7 12 Visual warn
66. nal working edge They may form irregular shapes which conform to the work site They may also extend at a level just above or below the main platform level BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 3 23 multilevel work platforms multilevel work platforms consist of two or more work platforms travelling on the same mast or an additional working level attached to and totally supported by a work platform For illustration see annex B 3 24 counter roller a roller used to counter react the gear meshing separation forces between a rack and pinion 3 25 automatic brake a device to decelerate and stop moving parts in case of interruption of the power supply 3 26 buffer a resilient stop at the end of the travel comprising a means of arresting using fluids springs or similar means 3 27 overspeed any speed above rated speed 3 28 safety gear a mechanical device for stopping and maintaining the work platform stationary on the mast in the event of overspeed 3 29 overspeed governor a device which when the work platform attains a predetermined speed above rated speed causes the safety gear to be applied 3 30 competent person a person having such practical and theoretical knowledge and such experience of that MCWP as is necessary to carry out the function satisfactorily 3 31 user user organisation the person or organisation which has direct control over the MCWP use BS EN 1495 1997 A2 2009 EN 1495 1997 A2 20
67. nd 5 1 2 8 For platform regions protected by such weather screens the wind forces on persons equipment and material coming under the protection of these weatherscreens may be neglected The mass of the weather protection screens shall be treated as part of the rated load 5 1 2 4 Dynamic forces Dynamic forces shall be taken into account by multiplying all moving masses by a dynamic factor of 1 15 Moving includes the raising and lowering of the work platform and also transfer of the MCWP in its transfer condition 5 1 2 5 In service wind loads 5 1 2 5 1 All MCWP used out of doors or otherwise exposed to wind whilst in service shall be regarded as being affected by a minimum wind pressure in accordance with table 2 Table 2 Minimum design wind data in service Installation Wind velocity m s Wind pressure N m Freestanding or MCWP during 12 7 100 erection and dismantling Tied MCWP 15 5 150 20 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 5 1 2 5 2 Wind forces are assumed to act horizontally at the centre of the wind area of the exposed structural parts of the MCWP 5 1 2 5 3 The windforce coefficients applied to areas exposed to the wind shall be in accordance with ISO 4302 The windforce coefficient for persons exposed to the wind is 1 0 5 1 2 5 4 The full area of one person is 0 7 m 0 4 m average width x 1 75 m height with the centre of area 1 0 m above the work platform floor
68. nder a mandate given to CEN by the European Commission and the European Free Trade Association to provide a means of conforming to Essential Requirements of the New Approach Directive Machinery 98 37 EC amended by 98 79 EC Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one Member State compliance with the normative clauses of this standard confers within the limits of the scope of this standard a presumption of conformity with the relevant Essential Requirements except ESR 1 5 8 and 1 7 4 f of that Directive and associated EFTA regulations WARNING Other requirements and other EU Directives may be applicable to the product s falling within the scope of this standard 71 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Annex ZB informative Relationship between this European Standard and the Essential Requirements of EU Directive 2006 42 EC This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association to provide a means of conforming to Essential Requirements of the New Approach Directive Machinery 2006 42 EC Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one Member State compliance with the normative clauses of this standard
69. ndment 1 approved by CEN on 1 September 2003 and Amendment 2 approved by CEN on 19 June 2009 This document supersedes EN 1495 1997 The start and finish of text introduced or altered by amendment is indicated in the text by tags and ad The modifications of the related CEN Corrigendum have been implemented at the appropriate places in the text and are indicated by the tags ad This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association and supports essential requirements of EU Directive s For relationship with EU Directive s see informative Annexes ZA and ZB which are integral parts of this document It is a type C standard related to safety for Mast Climbing Work Platforms deleted text According to the CEN CENELEC Internal Regulations the national standards organizations of the following countries are bound to implement this European Standard Austria Belgium Bulgaria Cyprus Czech Republic Denmark Estonia Finland France Germany Greece Hungary Iceland Ireland Italy Latvia Lithuania Luxembourg Malta Netherlands Norway Poland Portugal Romania Slovakia Slovenia Spain Sweden Switzerland and United Kingdom BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Introduction This standard is one of a series of standards produced by CEN TC 98 as part of the CEN CENELEC programme of work to produce machinery safety standards EN 414
70. neral stress analysis The general stress analysis is the proof against failure by yield or fracture The analysis should be made for all load bearing components and joints A 1 4 2 Elastic stability analysis The elastic stability analysis is the proof against failure by elastic instability e g buckling crippling The analysis should be made for all load bearing components subjected to compressive loading A 1 4 3 Fatigue stress analysis Only load case A has to be considered The fatigue stress analysis is the proof against failure by fatigue due to stress fluctuations The analysis should be made for all load bearing components and joints which are critical to fatigue taking into account the constructional details the degree of stress fluctuation and the number of stress cycles The number of stress cycles may be a multiple of the number of load cycles The number of load cycles for a MCWP is normally 2 x 10 intermittent duty e g 10 years 40 weeks per year 25 hours per week 2 cycles per hour It is permissible for the rated load to be multiplied by a load spectrum factor 0 5 For further information refer to accepted fatigue stress analysis methods 59 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E A 2 In the absence of an EN standard for design calculations the following is applicable for the design of aluminium structures A 2 1 Permissible stresses Symbols fy yield strength N mm fy ultimate strength
71. nneennnnner 31 5 5 Means to prevent the work platform from falling with overspeed m erunnavvvnnnnnnvvvnnnnnvnnnnnnnnnnenn 33 5 6 Means for emergency lowering and raising the work platform s rrrnnnnvvnnnnnnnvennnnnnnvnnnnnnnvnnnnnnnner 35 5 7 Overload moment device i205 cn ace ha in nna ent ha eked 36 5 8 Electrical Systems oenas arae EAr eA A EAEAN AE chen ET EAEN EAE VAATA AENA ANEN EAE 38 5 9 Hydraule System assistanse EEEE E seneveesedcnuasstcuscasecacursteeceestuule 39 5 10 Special requirements for safety devices depending on auxiliary circuits and for overload moment devices rmmnnsnavnrvnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 40 5 11 Travel Mit SVO O S a a aa rae a eara rae aa ae r aea ara aeaa ansiueqetsanderngncdnemetserdehececeueteerstanes 40 512 GOMO ore are ea EAn E EnEn EE Seta vee coun tu aE A AE EEE E e A 41 6 Verification of the safety requirements and or measures rwrnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnnnr 41 6 1 Examinations and tests for each new model of MCWP rrrnnnnvnrvrnnnnvnvnnnnnnnnvennnnnnvnnnnnnnnvennnnnnnvennnnr 41 7 Information f t USE iaar en deaa a ea Uae ker seed cu seceaile Ea eade eaa aa daa E a Eana ao aen aei eaaa iadaaa 44 7 1 Instruction handbook 2smmeremerenrereesaaaviegebvandings Boewee ede Sede cnnceenenetedsueedenyoet becuse tueeeehcochdetestecvensusnsccsestuve 44 7 2 Mar kihne EE AES a a NEKA ES AAAA N NEA E a N
72. nsideration when calculating the stresses This is very important when calculating a slender design or using materials with a low modulus of elasticity e g aluminium and can be done by using the theory of the 2 order The safety factors against fy or fy should be at least the following Load case A 21 7 Load case B S 2 1 55 Load case C S2 1 4 A 2 2 values for aluminium alloys The figures are valid for profiles but may also be used for tubes Table A 11 values for aluminium alloys 1 and 2 Alloy 1 Alloy 2 yield strength fy 235 N mm yield strength f 260 N mm 0 2 4 6 8 0 2 4 6 8 20 1 00 1 01 1 03 1 05 1 07 1 00 1 00 1 02 1 04 1 06 30 1 10 1 12 1 15 1 18 1 21 1 08 1 11 1 14 1 17 1 20 40 1 25 1 29 1 33 1 38 1 43 1 23 1 27 1 31 1 36 1 40 50 1 43 1 60 1 73 1 86 1 99 1 45 1 50 1 60 1 73 1 85 60 2 13 2 28 2 43 2 58 2 74 1 98 2 12 2 25 2 40 2 54 70 2 90 3 07 3 25 3 42 3 61 2 70 2 85 3 01 3 18 3 35 80 3 79 3 98 4 18 4 38 4 59 3 52 3 70 3 88 4 07 4 26 90 4 80 5 02 5 24 5 46 5 69 4 46 4 66 4 86 5 07 5 28 100 5 93 6 17 6 41 6 66 6 91 5 50 5 72 5 95 6 18 6 42 110 7 17 7 43 7 70 7 97 8 25 6 66 6 90 7 15 7 40 7 66 120 8 53 8 82 9 11 9 41 9 71 7 92 8 19 8 46 8 74 9 01 130 10 01 10 32 10 64 10 96 11 28 9 30 9 59 9 88 10 18 10 48 140 11 61 11 95 12 29 12 63 12 98 10 78 11 09 11 41 11 73 12 05 150 13 33 13 69 14 05 14 42 14 79 12 38 12
73. nt with the rack by more than one third of the tooth height even in the event of failure of a counter roller or other mesh control feature or local bending or deflection of the mast 5 4 2 3 The rack and pinion tooth model shall not be less than Four 4 for drive systems where the counter roller or other mesh control feature reacts directly on the rack without the interposition of any other mast profiles Six 6 where the reaction of the counter roller or other mesh control feature is by means of another element of the mast which is then in immediate contact with the rack 5 4 2 4 Any safety gear pinion shall be situated lower than the drive pinions 5 4 2 5 The drive pinion shall be designed according to ISO 6336 regarding tooth strength for a minimum of 10 load cycles The pinion shall be so dimensioned that based on ISO 6336 5 there shall exist a minimum safety factor of 1 5 for tooth strength taking into account the actual stress induced in the teeth under the total suspended static load per pinion 31 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 5 4 2 6 The rack shall be made from material having properties matching those of the pinion in terms of wear and shall be designed according to ISO 6336 regarding tooth strength for a minimum of 10 load cycles representing static strength The rack shall be so dimensioned that based on ISO 6336 5 there shall exist a minimum safety factor of 1 5 for tooth strength for
74. ntenance that the fixed guard will be removed regularly then the fastenings shall remain attached to the guard or to the machinery 5 4 1 3 Chains or belts shall only be used in drive mechanisms in conjunction with an electrical safety device which stops the work platform and keeps it stopped as soon as failure of a chain or belt occurs 5 4 1 4 Manual drive systems shall be designed and constructed to prevent kick back of handles 5 4 1 5 Measures shall be taken to prevent the uppermost guide rollers or shoes running off the top of the guides during normal operation Further measures shall be taken to ensure that under no circumstances including erection and dismantling can any safety device pinion come out of mesh with the rack 5 4 1 6 Measures shall be taken to ensure the continued stability of the work platform in the case of failure of any guide roller 5 4 1 7 Any hydraulic drive shall conform to EN 982 In addition the applicable requirements in 5 9 shall apply 5 42 Rack and pinion system 5 4 2 1 Means shall be provided to maintain the rack and the driving or any safety gear pinion constantly in mesh under all conditions of load Such means shall not rely upon the platform guide rollers The devices used shall restrict movement of the pinion on its axis such that at least two thirds of the tooth is always in engagement with the rack 5 4 2 2 In addition it shall not be possible for the pinion to move out of its correct engageme
75. on of the mechanical hydraulic pneumatic and electrical systems with special attention to safety devices 7 1 2 12 Instructions for erection and dismantling These shall include the following Detailed explanation of erection and dismantling procedure with special attention to mast assembly mast tie system platform and extension assembly Special hazards which can arise during erection and dismantling with a description of any additional safety equipment and how this may be used to reduce these hazards The use of personal protective equipment shall be mentioned in this connection Preparation of the site with special regard to the bearing capacity of the foundation gantry asphalt etc Preparation of the site so that under no circumstances can instability occur during transfer of the equipment when using movable chassis If platform travel must be limited due to obstructions in the travel path and the platform therefore does not reach the normal limit switches additional travel limit devices shall be installed to protect persons and material on the platform or the platform itself from hazardous situations 48 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Procedures to be observed when preparing the MCWP for transport shall be specified If the MCWP can be loaded on a vehicle for transport or transfer suitable loading procedures must be given The clear gap between the ends of adjacent MCWP
76. plied to the supporting structure to be calculated 5 3 Work platform 5 3 1 General 5 3 1 1 The work platform shall remain in a horizontal position within 2 during normal movements of the platform and under the application of the rated load and other forces exerted during normal operation During operation of the means described in 5 5 and the emergency lowering raising device in 5 6 the max permitted variation from horizontal shall be 5 5 3 1 2 Trapdoors in the work platform shall be securely fastened and shall not open downwards 5 3 1 3 The floor material shall be slip resistant The floor shall be easy to clean and shall be self draining Any opening in the floor or between the floor and toeguards or access gates shall be dimensioned so as to prevent the passage of a sphere of 15 mm diameter The floor material shall be securely fixed to the work platform Any extensions shall be prepared for fixing of the floor material 5 3 1 4 The work platform floor shall be designed to withstand without permanent deformation a static load of at least 200 kg exerted on the least favourable square area of 0 1 x 0 1 m 5 3 1 5 Any telescopic extensions of the main platform shall be able to be secured to prevent their inadvertent movement There shall be a clear indication of the maximum permitted extended position 5 3 1 6 Platform extensions shall not be more than 0 5 m above or below the level of the main platform 28 BS EN 1495 1997 A2 20
77. pply Unexpected ejection of machine parts or fluids Failure or malfunction of control system Errors of fitting Overturn unexpected loss of machine stability Hazards caused by missing and or incorrectly positioned safety related measures means Neglected use of personal protection equipment Guards Safety related protection devices Starting and stopping devices Safety signs and signals Information or warning devices Energy supply disconnecting devices Emergency devices Feeding removal means of workpieces RELEVANT CLAUSES IN THIS STANDARD 5 2 1 6 5 2 5 2 5 6 2 5 12 5 12 8 NA 7 1 2 6 NA 5 2 2 1 5 12 5 1 1 1 5 1 1 2 5 1 3 5 1 5 2 2 1 5 6 5 8 1 4 5 12 7 5 9 7 5 9 8 5 9 9 5 9 10 5 2 1 5 5 1 5 1 5 5 1 1 2 5 1 5 5 7 5 12 8 7 1 2 7 7 1 2 12 5 7 5 1 1 5 3 4 9 5 12 5 2 2 7 7 1 2 9 7 1 2 9 5 2 1 2 5 8 1 2 5 5 5 6 NA Essential equipment and accessories for safe adjusting 5 2 3 1 5 4 2 10 and or maintaining 11 10 Equipment evacuating gases NA 13 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Table 1 2 List of hazards part 2 HAZARDS RELEVANT CLAUSES IN THIS STANDARD 12 Inadequate lighting of moving working area 7 1 2 6 continued 13 Hazards due to sudden movement instability etc 5 1 5 5 2 2 1 5 2 2 3 5 2 2 4 5 4 3 during handling 14 Inadequate non ergonomic design of operating position 14 1 Hazards due to dangerous environments contact with 5
78. r assembly which moves in a substantially horizontal plane and may be powered or operated manually 3 14 mast a structure that supports and guides the platform 3 15 mast fixed length a mast whose length is fixed and cannot be varied even by the attachment of further mast sections 3 16 mast variable length a mast whose length can be varied by the attachment of successive lengths of prepared sections 3 17 guides the parts of the mast which provide guiding for the work platform 3 18 mast tie the anchorage system used to provide lateral restraint to the mast from the building or other structure 3 19 work platform The vertical travelling part of the installation upon which the persons equipment and materials are carried and from which work is carried out This is as opposed to the MCWP which refers to the whole of the installation inter alia work platform mast mast ties base and chassis The work platform includes the main platform and any platform extension 3 20 available platform area the area of the work platform measured at the work platform floor level 3 21 main platform that part of the work platform which is built up using primary structural elements 3 22 platform extensions those additional parts of the work platform which are built up using secondary structural elements whose support and location is dependent upon the main platform They are used to extend the main work platform usually along its longitudi
79. r fy the permissible stresses should be calculated with the safety factors given for non alloy structural steels A 1 1 3 Bolts A 1 1 3 1 Black and fitted bolts The permissible stresses are derived from X which is the lower value of fy and 0 7 x fu 0a X S Ta Oa N2 Table A 3 Permissible stresses in bolts N mm Grade 4 6 5 6 6 6 6 8 8 8 10 9 Load S fy 240 300 360 480 640 900 Ease X 240 300 360 420 560 700 A 1 5 Ca 160 200 240 280 373 467 Ta 113 141 180 198 264 330 B 1 33 Oa 180 225 270 315 420 525 Ta 127 159 191 223 297 371 C 1 25 Oa 192 240 288 336 448 560 Ta 136 170 204 238 317 396 A 1 1 3 2 Preloaded bolts Grade 8 8 and 10 9 only Grade 12 9 may however be used if the conditions stated below are fulfilled See Eurocode 3 ENV 1993 1 1 1992 Symbols As tensile stress area of bolt mm Fy preload N d nominal bolt diameter mm M tightening torque kNm Bolts used once F 0 8 x fy x As Bolts used several times F 0 7 x 0 8 x fy x As Tightening torque znae 1000 The applied load F in relation to the preload F should be F Fv lt 0 67 for load case A F Fv lt 0 75 for load case B 54 F Fv lt 0 8 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E for load case C A 1 1 3 3 Bearing pressure The permissible bearing pressure depends on the basic material and is valid for bolted connections and also for pins Loose conne
80. relevant requirements of this clause 5 2 2 6 Towbar If towbars when not in use are left in a raised position an automatic device shall be provided to hold the towbar in this position Unintentional release shall not be possible Towbar and steering mechanisms shall be designed to prevent handling hazards to the user 5 2 2 7 Warning marks Outriggers outrigger beams and other parts of the base frame or chassis protruding from the main outline of the platform shall be marked with warning colours 5 2 3 Mast structure 5 2 3 1 General Detailed examination of the rack and its means of attachment shall be possible without dismantling 5 2 3 2 Racks The racks shall be securely attached to the mast Joints between adjacent sections of the rack shall be accurately aligned to avoid faulty meshing or damage to teeth 5 2 3 3 Tie attachment points If the MCWP is to be tied into a separate supporting structure the mast sections shall be designed to accommodate the attachment of ties at appropriate intervals Attachment points shall be designed in accordance with 5 1 5 2 3 4 Marking All mast sections shall be marked with an individual identification or serial number enabling the date of manufacture to be determined 5 2 4 Mast design with regard to erection Effective means shall be provided to ensure so far as practicable that only correctly interchangeable mast sections can be connected together The design of the mast shall ens
81. rm is not powered into the buffers After triggering the lower final limit switch all movements of the work platform shall be prevented until corrective action has been taken by a competent person 5 11 3 Separately mounted actuating and control devices shall be used for the terminal stopping travel limit switches and the final limit switches It is permitted to have one final limit switch to serve both the upper and lower limit switch functions 40 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 5 12 Controls 5 12 1 On self propelled MCWP it shall not be possible to operate the horizontal and vertical movement for the transfer controls simultaneously 5 12 2 The control device for normal vertical movement shall be situated on the work platform only The control device for horizontal movement of the MCWP chassis shall not be situated on the platform 5 12 3 If movement can be controlled from different control positions the controls shall be interlocked in such a way that control is only possible from one pre selected control position 5 12 4 Platforms shall be provided with hand operated controls such that all movements of the platforms can only take place whilst the control is being actuated When released the controls shall automatically return to the neutral position All controls shall be arranged to prevent inadvertent operation 5 12 5 Whilst moving the platform vertically the positioning of the control station has to be arr
82. rs The load combinations to be taken into consideration shall be as follows Load combination A1 MCWP in service without wind static Load combination A2 MCWP in service without wind dynamic Load combination B1 MCWP in service with wind static Load combination B2 MCWP in service with wind dynamic Load combination B3 MCWP during erection or dismantling Load combination B4 MCWP during transfer condition Load combination C1 MCWP striking the buffer whilst in service Load combination C2 MCWP during action of the safety means whilst in service Load combination C3 MCWP out of service 22 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E The above load combination references A1 A2 B1 B2 etc are used in Annex A informative as load case A load case B and load case C as appropriate In each load combination the loads and forces acting on the MCWP shall be in accordance with table 4 Safety factors for structural steels and aluminium alloys are given in Table 5 and Table 6 respectively Table 4 Load combinations that shall be taken into consideration Load combination Loads Ref A1 A2 B1 B2 B3 B4 C1 C2 C3 clause Structural loads 5 1 2 1 X X X X X X X X X Rated load 5 1 2 2 X X X X X X Horizontal forces 5 1 2 3 X X Dynamic forces 5 1 2 4 X X X X In service wind loads 5 1 2 5 X X X X Loads and forces during 5 1 2 6 X X transfer condition Erection and dismantling 5
83. s installed A control switch not opening which is forced open mechanically if the values specified by the manufacturer for electrical protection rated power method of installation rate and angle of operation etc are taken into account for installation of the contact Bridging of an auxiliary switch by an insulation defect s but do apply if this results from earth leakage or moisture against which a waterproof housing is often a reasonable solution Interruption of or short circuit between tracks of printed circuits if the printed circuits satisfy the applicable requirements specified in EN 60065 Short circuit in an optocoupler if the creepage paths and air gaps between the connecting wires may be regarded as adequate and a test voltage of 2 8 kV can be sustained between the input and output circuits Interruption or short circuit in a resistor if the resistor has an insulating paint coating a reduction of the rate power up to approximately 66 has been applied and short circuit of the resistor is otherwise also prevented by for example its arrangement C 2 3 3 If more defects can occur in the detecting device due to a defect in a component the provisions of C 2 1 and C 2 2 are then also applicable 70 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Annex ZA informative Relationship between this European Standard and the Essential Requirements of EU Directive 98 37 EC This European Standard has been prepared u
84. shall be not less than 0 5 m Precautions shall be taken to ensure the free and safe movement of any trailing cable throughout the full range of travel of the work platform Where the mast is inclined or where multilevel work platforms to option B annex B are used additional precautions are necessary for example by making the cable follow the incline of the mast by the use of guides or the use of automatic cable reeling drums F Where the platform is erected towards a wall the instructions shall furthermore contain information regarding the required height h of guard rails on the work platform depending on the distance d between the platform and the wall according to Figure 9 and Table 8 The instructions shall include specific information to the user that it is very important to take into account the local use of the different guarding options in relation to the distance that is locally existing between platform and wall face Users are responsible for any changes to or removal of guard rails in accordance with the legislation and possibly the working conditions in force in the member state where the platform is erected Key 1 wall 2 guard rail 3 work platform Figure 9 49 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Table 8 Height of guard rails d m lt 0 25 0 25 lt d lt 0 4 gt 0 4 h m 0 15 20 7 gt 14 with intermediate rail and toeboard according to 5 3 2 2 P without
85. substantially exceeded 6 1 2 4 2 Test of the systems to prevent the work platform from falling with overspeed according to 5 5 1 1 a Safety gear Functional tests of the safety gear shall be carried out with the platform carrying 1 1 x the rated load The work platform shall be allowed to overspeed to the governor tripping speed in order to determine that a The overspeed device operates as specified by the designer and b The safety gear is capable of arresting the motion of the work platform without the assistance of motor brakes and is within the designer s quoted stopping distance 6 1 2 4 3 Test of the systems to prevent the work platform from falling with overspeed according to 5 5 1 1 b Functional tests of the independent drive units shall be carried out with the platform carrying 1 1 x the rated load It shall be determined that a The work platform can be stopped and sustained from rated speed by each of the drive units in turn by intentional release of the motorbrake of each one of the drive units in turn during the test b The platform can be stopped and sustained from rated speed by intentional activation of the safety system according to 5 5 3 i c In each case the stopping distance is within the designer s quoted specification 6 1 2 4 4 Test of the means for emergency lowering and raising of the work platform a For work platforms equipped with safety gear according to 5 5 1 1 a check that the controls comp
86. t by one of the following measures a Design the circuit of the detecting device in such a way that the prescribed continued switched off condition of the MCWP is achieved when a defect has developed b Use a circuit to check the circuits in the detecting device for the presence of a defect Such a circuit shall be designed and connected in such a way that The relevant test key shall be operated after each MCWP shut down before the MCWP installation can be started and The MCWP installation cannot be started if there is a defect in the test circuit or in the detecting device c Design multiple circuits in the detecting device and incorporate them in a test circuit The test circuit shall be designed and connected in such a way that the MCWP is switched off if there is a defect in the test circuit or one of the parallel circuits of the detecting device d Earth or connect to the frame of a circuit in which relays or solenoid switches are incorporated to ensure the MCWP is switched off if earth or frame leakage occurs C 2 3 Defects to be anticipated C 2 3 1 The following defects and actions shall be taken into account on the basis of C 2 1 and C 2 2 a Break dislodging or detachment of a cable forming the connection between the individual units of the installation which are mounted in cabinets interruption or drop in one of the supply voltage s at any moment b Earth or frame leakage or interruption in the circuit
87. t in and out of service m Maximum allowable wind speed during erection and dismantling m s Maximum allowable wind speed in and out of service m s Hydraulic supply information if an external hydraulic power supply is used Pneumatic supply information if an external pneumatic power supply is used Electrical supply information if an external electric power supply is used Warning sign required regarding moveable control stations 7 1 2 2 Capacity information The following information shall be made available both for MCWP with non varying work platform configuration and for MCWP with varying work platform configurations In the case of variable configuration designs the rated loads for particular main platform and platform extension configurations and any limitation as to load distribution shall be displayed each time the MCWP is installed see 7 2 3 Maximum platform dimensions length x width including platform extensions 44 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Rated load kg Maximum lifting height untied mast m Maximum lifting height tied mast m Tie distance m Top overhang in operation m Maximum permitted force applied to tools manually or mechanically assisted which is to be reacted by the work platform Maximum rated load on platform extensions kg Any load permitted on the work platform during transfer condition Sufficient information shall be gi
88. te cm width of plate cm factor depending on the stress conditions Oe Euler s buckling stress N mm Oki ideal buckling stress N mm Ovki ideal combined buckling stress N mm Ovk reduced combined buckling stress N mm og higher stress N mm o2 lower stress N mm Oki Ko X Oe Tki KTX Oe W 01 02 The reduced buckling stress oy is defined in the following way 56 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Owi lt 0 7 x fy Ov Ovki Ovi gt 0 7 x fy O f X4 Ea 04 1 fy The required minimum safety factor v depends on the load combination Load case A v2 1 71 0 180 x v 1 0 Load case B v2 1 50 0 125 x w 1 0 Load case C v 2 1 33 0 075 x w 1 0 For further information refer to accepted buckling calculation methods A 1 2 Limit state method The deflection of a structure should be taken into consideration when calculating the stresses This is very important when calculating a slender design or using materials with a low modulus of elasticity and can be done by using the theory of the 2 order The safety factors against fy or fy should be at least the following Load case A S 2 1 50 Load case B S 2 1 33 Load case C S 21 25 A 1 3 values for non alloy structural steels 57 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Table A 5 values for S 235
89. ted number of persons and the weight and distribution of materials for the particular configuration 3 3 rated speed the vertical or horizontal speed for which the MCWP has been designed 3 4 transfer any horizontal movement of the MCWP from one position to another on the same working site 3 5 transfer condition the configuration of the MCWP in which the MCWP is moved from one position to another on the same working site and any limitation on the weather and the load or persons on the MCWP 3 6 transport any movement of the MCWP outside the boundaries of the working site 3 7 transport condition the configuration of the MCWP in which the MCWP is moved outside the boundaries of the working site for example road transport 3 8 transfer and transport interlocks any design features on the MCWP which prevent unsafe transfer or transportation 3 9 base frame the part of the MCWP which provides support for the mast and elevating assembly BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 3 10 chassis the part of the MCWP which provides mobility and support for the mast and elevating assembly 3 11 rail mounted chassis a chassis designed to transmit horizontal as well as vertical forces to the ground via rails 3 12 outriggers Supports at the base frame level used to maintain or increase the stability of the MCWP within specified conditions They may also be used for levelling 3 13 outrigger beam that part of an outrigge
90. the actual stress induced in the teeth 5 4 2 7 When more than one drive pinion is meshing with the rack it shall only be permissible to share the design loads between the pinions if a self adjusting measure is provided to guarantee load sharing under all normal running conditions For drive systems according to 5 5 1 1 b load sharing shall be neglected and calculation of the rack and the pinion shall be in accordance with 5 5 3 g 5 4 2 8 A pinion shall never be used as a guide roller 5 4 2 9 Visual examination of all the pinions shall be possible without removal of the pinions or major disassembly of structural components of the MCWP 5 4 3 Braking systems 5 4 3 1 General requirements 5 4 3 1 1 Every work platform shall be provided with a brake system which operates automatically a Inthe event of loss of the main power supply b Inthe event of loss of the supply to control circuits If two or more masts are used there shall be a braking ability for each mast The braking system shall have at least one electro mechanical brake friction type or hydro mechanical brake but may in addition have other braking means e g electric Belts or chains for coupling the drive pinion to the component on which the brake operates are not permitted 5 4 3 1 2 The brake s on its own shall be capable of stopping the platform travelling at rated speed and with 1 25 times the rated load with a retardation between 0 2 and 1 0 g In addition
91. the buffer s shall be at least equal to the stopping distance corresponding with the work platform with rated load being arrested by the buffers from its maximum possible speed at a deceleration of 1 0 g The maximum possible speed to be considered shall be that which can occur in service or the tripping speed of the overspeed governor whichever is the greater 5 4 4 3 If the buffers travel with the work platform they shall strike against a clearly recognizable pedestal 5 5 Means to prevent the work platform from falling with overspeed 5 5 1 General 5 5 1 1 All MCWPs shall be equipped with a device or means which prevents the work platform from falling in the event of any failure other than a structural failure of the mast work platform and which operates before a speed of 0 5 m s is exceeded This device or means shall automatically arrest and sustain the work platform with 1 1 x the rated load These devices or means shall when tripped cause a deceleration not less than 0 05 g and not more than 1 0g 33 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E This shall be achieved by one of the following systems a A safety gear or b Two or more independent and identical electric motor direct drive units fitted to each mast 5 5 1 2 Adjustable components which have a safety related function shall either require tools for their adjustment or be capable of being sealed against unauthorised adjustment 5 5 1 3 These devices or me
92. ure effective load transfer between adjacent mast sections and that alignment is maintained 27 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Where the vertical members of the mast sections are used as guides for drive frame guide rollers the joints of adjacent sections shall provide a continuous path MCWP with masts which are tilted to the working position for use shall be equipped with a device to ensure that the mast is mechanically locked in the working position automatically It shall not be possible to raise the work platform unless this lock is engaged 5 2 5 Mast ties 5 2 5 1 General MCWP s will require lateral restraint from an adjoining separate supporting structure when erected above the manufacturer s specified maximum free standing height This restraint will normally be in the form of mast ties attached at intervals between the mast and the supporting structure 5 2 5 2 Design Mast ties shall be designed for manual handling and ease of assembly using hand tools and shall provide a degree of adjustment to accommodate tolerances between the MCWP mast and the supporting structure They shall provide sufficient torsional rigidity to the mast 5 2 5 3 Attachment to the supporting structure The attachment of the mast ties to the supporting structure shall be designed to resist all forces generated both in and out of service Sufficient information shall be provided in the instruction handbook to enable the forces ap
93. ven in the instruction handbook provided by the manufacturer such that the owner can derive the particular details for each configuration These particular details shall then be augmented by the name of the erection site and a reference to the relevant chapter in the instruction handbook such that the user can display this load diagram on the MCWP 7 1 2 3 Dimensions and weights Height from the ground to the work platform in its lowest position for access m Platform section length x width x height m Platform section weight kg Mast section length x width x height m Mast section weight kg Drive unit length x width x height m Drive unit weight kg Chassis length x width x height m Chassis weight kg Outrigger spread and configuration length x width m Base unit specified transport configuration weight and dimensions length x width x height m MCWP installed by crane weight kg MCWP installed by crane max height of mast m Minimum area required for installation length x width m 7 1 2 4 Electrical data Power lifting machinery kW 45 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Power transfer machinery kW Supply voltage frequency V Hz Control voltage frequency V Hz Maximum starting current A Maximum power consumption kVA Minimum power supply kVA Main power supply fuses and type A Outlets for portable tools voltage and current V A
94. venia Spain Sweden Switzerland and United Kingdom T EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROP EN DE NORMALISATION EUROP ISCHES KOMITEE F R NORMUNG Management Centre Avenue Marnix 17 B 1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved Ref No EN 1495 1997 A2 2009 E worldwide for CEN national Members BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Contents Page ForewordasuisasistkfdtepalesrteruudkdsuGeiuer ee 3 Taire Tea aol a AEAEE EEE ETETETT T E dexbeasehcadsceades E 4 1 SCOPE ar arara aa rr ara aea aE E R Eaa Ee A aAA aae Ae eaaa A sover AERES LEAREN SEE 4 2 Normative references rrnsanavnrnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 5 3 Detinitlons nualnuausdrrssrlsaetdadsttolsed NRS Me 6 4 kist orhazards an oe facie cans ceeds eset fansen A ee 11 5 Safety requirements and or MeaSUreS rrnsrnnnnavnnnnvnnnnvnnnnnvnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 15 5 1 Structural and stability calculations rrrsavrnnnnvnnnnvvnnnnvnnnnnnnnnnvvnnnnvnnnnnnnnnnvnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 15 5 2 General machine requirements base frame chassis and masSt rrrsnvnvnnnnnnvnvnnnnnnnnvnnnnnnnnnnnnnnnnenr 25 5 3 Work ET EE EN EM ee A E A Sa A 28 5 4 Drive systems for elevation rrrrsssvnnnnnnnvnnnnnnnvennnnnnvennnnnnvnnnnnnnvennnnnnnnnnnnnnennnnnnennnnnnnennnnnnnnenn
95. way as specified in 5 1 5 1 1 5 1 5 1 2 and 5 1 5 1 3 as appropriate 5 1 5 1 5 Inaccuracies in setting up according to 5 1 2 11 shall be taken into account in the stability calculation 5 1 5 2 Calculation of overturning and stabilizing moments 5 1 5 2 1 The maximum overturning and corresponding stabilizing moments shall be calculated about the most unfavourable tipping lines The calculations shall be made with the MCWP in the most unfavourable configurations with the maximum allowable inclination of the chassis defined by the manufacturer Every load and force combination including inaccuracy in setting up shall be taken into account in their most unfavourable combinations In each case the calculated stabilizing moment shall be greater than the calculated overturning moment 24 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E 5 2 General machine requirements base frame chassis and mast 5 2 1 General machine requirements 5 2 1 1 The MCWP and all parts belonging to it shall be calculated in accordance with 5 1 5 2 1 2 MCWP shall be equipped with a permanently installed device on the work platform to switch off the work platform and secure it against unauthorised use whilst out of service Similar devices shall be permanently installed at the chassis of self propelled MCWP which isolates all movements of the MCWP Such devices shall be secured by a pad lock or similar device 5 2 1 3 Trapping and shearing points between the
96. wind loads Whilst out of service with the work platform in a safe position the wind pressure for the calculations shall be in accordance with table 3 The limiting wind pressure shall be considered in the most unfavourable direction 21 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E Table 3 Design wind pressures out of service Height of member above Wind Velocity m s Wind Pressure N m ground level m 0 to 20 35 8 800 over 20 to 100 42 1100 over 100 45 9 1300 NOTE The wind values given in table 3 are minimum values for the central European area and at low altitudes In special cases e g coastal areas or at higher altitudes information set out in specific national standards shall be used until relevant European standards are available 5 1 2 9 Buffer zones Buffer forces shall be calculated taking into account the characteristics of the buffer 5 1 2 10 Action of the safety means according to 5 5 To determine the forces produced by an operation of these means the sum total of all travelling masses shall be multiplied by a factor of 2 A lower factor but not less than 1 2 may be used if it can be verified by test under all conditions of loading up to 1 5 times the rated load 5 1 2 11 Inaccuracies in setting up For the purposes of calculation an allowance of an additional 0 5 shall be made to allow for user inaccuracy when erecting the mast 5 1 3 Load combinations and safety facto
97. y the manufacturer Max allowable inclination and operation on the max gradient permitted by the manufacturer shall also be considered The feet of the outriggers shall be designed to swivel in all directions by an amount equal to the maximum gradient specified by the manufacturer plus at least 10 A notice on the outriggers shall refer the user to the instruction handbook for information on the applied ground pressure resulting from the outrigger feet Movement of the outrigger beams shall be limited by mechanical stops It shall also be possible to lock them at least in their extreme positions 26 BS EN 1495 1997 A2 2009 EN 1495 1997 A2 2009 E The outriggers shall be designed and manufactured so that unintentional movement is prevented Any hydraulic outrigger shall be equipped with a load holding valve mounted directly to the cylinder This valve e g a pilot operated check valve or brake valve shall prevent unintended flow of oil to or from the cylinder even in case of pipe or hose rupture The closing of this valve shall not cause a dangerous situation Power operated outriggers shall be fitted with a device to prevent power operated movement of the outriggers unless the work platform is in its intended position Outriggers relying on a permanent pneumatic pressure to provide support during use of the platform shall not be used Where central supports are provided directly beneath the masts these shall also comply with the

EN 1495:1997+A2

Contents

Download Pdf Manuals

Related Search

Related Contents