USER GUIDE
Contents
1. NN ji N K Y i Y vt I oe Ss SA Bae LN i 2 j l WS Gi NJ i a yp A d f sE HALA i AJA HOSS SEY Sek K Deck lock LALO T Toeboard FIGURE 5 FIGURE 6 Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 207 or 257ml S y y Console brackets to clase top lift if required Im standard z A i 1i LA ET H ROM NS jea H Pata EA H a F Sie he a hs i FIGURE 7 Valid guide as at 2606 03 Layher D4 Layher 4 Standard Site Stair More possibilities The Scaffolding System 5 3 Erection Sequence Note Follow all local and site regulations when erecting the structure Safety harnesses should be worn by all erectors and used whenever work is being carried out from an un protected position 5 3 2 Stair Direction Alternating 1 Position 4 no adjustable base plates on suitable sole boards or spreaders not supplied by Layher according to the plan dimensions l e 1 4m wide x 2 57m or 3 07m long 2 Place base collars on base plates 3 Link base collars with ledgers Use a U transom at the foot of the first stair Check carefully the orientation and position of the first stair to assure that the exit from the uppermost lift s is as required Use only the small holes on the base col2. Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 6 Valid guide as at 26 06 03 Layher 4 Layher 4 Standard Site Stair More possibilities The Scaffolding System 5 0 Assembly Procedure 5 1 Prior to Assembly 5 1 1 Equipment All equipment should be inspected for condition and suitability Any damaged or incorrect material should be removed and replaced with new or undamaged material Only genuine Layher material should be used 5 1 2 Foundations e The foundations for a scaffold should be adequate to carry and dispose the load imposed both locally at each standard and in general to carry the whole weight of the scaffold e On surfaces such as steel and concrete which are even and level and where there is adequate hardness and thickness to prevent the scaffold tube penetrating into the surface the uprights of a scaffold may be placed directly on the surface although it is generally preferable to use a base plate e On surfaces such as hard asphalt timber and flooring where there is possibility of the standards deform ing the surface base plates or metal packing plates should be used at the bottom of the standards e Onsoil ash hogging gravel soft asphalt and any type of flooring or paving which would be penetrated by a standard with a base plate beneath it or if there is doubt about the surface there should be a further spreading of the load by
3. 6 0 Do s and Don ts DO Ensure all on site users know for what purpose the scaffold is intended and the loads it is designed to take Prepare the ground for the scaffold and the loads it will impose Ensure that you provide agreed storage areas for scaffolding on site to reduce handing and prevent tripping hazards Keep access routes clear and Inspect the scaffolds and issue reports It is required by law Give consideration to the use of a tagging system Prevent access to incomplete and or unsafe scaffolds and ensure that you have scaffold not to be used signs in place Tell the scaffolding contractor if the scaffold gets damaged repairs can then be arranged Protect scaffold from damage by site plant Ensure loads on the platform are evenly distributed Consider the weight of the materials you are loading on the scaffold and instruct operatives on maximum loading Instruct forklift driver on maximum loading Instruct operatives who will be using scaffold not to make adaptations Report scaffold defects to scaffolding contractor DON T Remove ties or guardrails toe boards or brick guards or any components or adapt scaffolding Create gaps in platform by removing scaffold boards from platform Work on or use scaffolds which are being erected or dismantled or remove ladders or overload the scaffold Undermine the scaffold by digging trenches or foundations under or adjacent to it Add sheeting or netting to scaffold without the approv
4. dipped galvanised steel a 2607 140 Wedge lock system forms a frictional l 2607 257 positive locking connection and ensures an even i 2607 307 distribution of load between standard and ledger TELESCOPIC LEDGER Extending top guardrail closer ledger U TRANSOM Reinforced and made from steel the V 2613 109 U transoms house the steel decking stair units and lock against lift offs DIAGONAL BRACE Constructed from steel and used to brace standards and ledgers 2620 257 2620 307 CLOSER UNIT The closer unit is used to form a stop end guard rail at the top of the stairtower exit point TOE BOARDS Timber with steel end sections which fit over the hook on the lalos STEEL DECKS 0 32m wide up to scaffold group 6 6kN m2 according to length perforated non slip R320 ERECTION DECKS Hooks over the Ledgers to provide a temporary work platform LALO 2 6kg 9634 140 For securing the decks against lift off Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 4 Valid guide as at 26 06 03 Layher 4 Standard Site Stair DESCRIPTION ALUMINIUM PLATFORM STAIRS Safe labour saving all in one unit constructed from aluminium for either 2 57m or 3 07m tower bays x 2m lift NEW PARTS 1 5m Lift height stair units EXTERNAL GUARDRAIL Constructed from steel and attaches to the ledgers from 2m upwards At ground level
5. guardrail unit and secure with wedges Note external guardrail fits over end guardrails at top and over guardrail adaptors at bottom 10 Standing on the 2m level decks connect 2 ledgers as handrails for the 2m level and a further 2 ledgers and 2 tran soms at the 4m level Figure 4 11 Fit diagonal braces to every face Figure 4 Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 10 Valid guide as at 26 06 03 Layher 4 Standard Site Stair Layher X4 More possibilities The Scaffolding System 12 Lift 2 stair unit into position and secure claws into U transoms at top and bottom Figure 5 13 Lift 2 further steel decks into position at the 4m level positioning them directly above the decks at 2m level 14 Secure stairs and decks by inserting board lock into U transoms at top and bottom platforms 15 Fix 1 4m end toe board across each end of platform at 2m level fitting loop over pin on board lock and engaging cupped end with the opposite standard Figure 6 16 Proceed in a similar fashion in 2m lifts using 2m or 4m standards until the top section is reached Figure 6 17 Note The tower is to be tied to the permanent structure as erection proceeds on both inside standards at 4 0m height intervals 18 Finish the top lift with 3m standards to support double handrails Layout is variable to suit different exit points Figure
6. Each Stairtower must be designed by a competent engineer to meet the particular contract requirements The notes which follow have been prepared for the guidance of those concerned with the erection of the system Layher wish to maintain the most effective methods at all times and therefore reserve the right to amend the following information 3 Components DESCRIPTION LENGTH WEIGHT PART NO 0 60m BASE JACK 2 9kg 4001 060 Steel adjustable robust and self cleaning spindle thread with colour and indent marks which prevent over extension 2602 000 The standard steel base collar with rosette is to be used in conjunction with adjustable base jacks to form the scaffolding base always place a base collar onto the adjustable base jacks first and then place the standards 2603 100 2m 2603 200 3m 2603 300 4m 2603 400 STANDARDS Standards are made from tubular steel OD 48 3 X 3 2 mm hot dip galvanised with rosettes at 500 mm centres for up to 8 connections at the same joint Small holes are for right angled connections and the large holes are for variable angle connections BASE COLLAR 7 Lt 4 444 1m Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 3 Valid guide as at 24 06 03 Layher 4 Layher 4 Standard Site Stair More possibilities The Scaffolding System DESCRIPTION LENGTH WEIGHT LEDGER 2607 109 Made from hot
7. Layher X4 Layher 4 Standard Site Stair More possibilities The Scaffolding System USER GUIDE Waa m A i a Tii I i k q x A al i i y TT tl n B a i i P Ej i a L r SF js a PARALLEL SAME DIRECTION ALTERNATING DOG LEG Layher Ltd NOTE lt is the responsibility of the customer to ensure they read the correct pages System scaffolding Roofs and Stairs Works Road USE 4STD Letchworth Herts SG6 1WL Valid guide as at 24 06 03 Tel 01462 475100 Fax 01462 475101 k Layher 4 Standard Stair Tower Assembly amp Use Instructions Index 1 2 General Types Components Dimensions Assembly 5 1 Prior to Assembly 5 2 Tools 5 2 1 Protection of falls from height 5 3 Erection Sequence 5 3 1 Parallel direction 5 3 2 Alternate direction 5 4 Extending the Platforms 5 5 Tying In Do s and Don ts Hints and Tips Inspection Check List Layher 4 Layher 4 Standard Site Stair Viore possibilities The Scaffolding System 1 General The Layher 4 Standard Stair Tower is designed for short term to medium term use by operatives on smaller building sites 2 Types The stair modules are manufactured from aluminium with a width of 0 64m and lengths of either 2 57m or 3 07m In each case the stair module provides both stair and landing in a single unit and can be erected in the same or alternating dog leg directions Duty rating 2kN m2
8. a sole plate of timber or other suitable material e When a sole plate is used the sole plate area beneath any one standard should be at least 1000cm with a least dimension of 219mm and if the sole plate is of timber it should be not less then 35mm thick On sites where the ground is soft or has been disturbed the sole plate area should be not less than 1700cm when individual sole plates are used e g under hoist towers and not less than 3400cm when two are combined together under two standards In this case if the sole plate is of timber it may be necessary to use one with a total thickness in excess of 35mm Sole plates should be long enough to support two stan dards e The soil or ground beneath the sole plate should be well compacted and free from irregularities which would make the sole plate unstable or poorly bedded e On slopes exceeding 1 vertical to 10 horizontal a check may have to be made on the foundations to en sure the stability of the scaffold 5 1 3 Protection of the Public e Scaffolding is frequently erected in areas to which members of the public have access such as streets courtyards halls and gardens The precautions which need to be taken to protect the public during the erection modification and dismantling of scaffolds are similar to those which need to be taken to protect other workpeople on an enclosed site but because of the public s unfamiliarity with the dangers and curi osity about the work and bec
9. al of the scaffold designer Forklift loads directly onto access scaffold instead use a loading tower Allow site plant to run over scaffold materials Damaged scaffold boards cause accidents bent tubes could lead to collapse of the structure 7 0 Hints and Tips Tip 1 When fixing the AR wedges always use a hammer with a minimum weight of 500g 11b It is not acceptable to use the handles of spanners or light duty toffee hammers Tip 2 Always ensure that the holes in the standards are facing in the same direction This ensures that if ever the joints are required to be bolted the bolts will fit Tip 3 Sway braces are available in all sizes however to brace a lift different from the brace sizes to hand it is permissible to connect the brace at one end by the wedge and at the other end by a swivel coupler within 150 mm of the node point Tip 4 To assist with assembly one end of a ledger can be temporarily located on top of a rosette by inserting the end of the wedge through the hole whilst the other end is being fixed After fixing it is imperative that this resting end is properly fixed Tip 5 When commencing construction always ensure that the scaffold is started from the highest point Work away from this point adjusting the base jacks at each standard when the maximum extension Is reached the standard can be lowered 500mm and the above procedure is then repeated Tip 6 Always plan your scaffold first Using the Layher
10. ause there may be a large number of people at risk high standards of physi cal protection and more effective systems of work and supervision will generally be needed e During erection modification and dismantling care should be taken to exclude the public from the area of the work and a sufficient area around the work In confined areas it may be necessary to provide an ade quately protected thoroughfare while the scaffold is in use Effective steps should be taken to prevent persons being struck by falling objects and again the provision of a protected thoroughfare suitable brick guards facade nets sheeting or fans may be necessary e In general care should be taken that at the lower levels of a completed scaffold there are no protruding tubes low headroom etc that could cause damage or injury to members of the general public or their property e g clothing Where access through parts of the base of a scaffold structure might prove Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 l Valid guide as at 26 06 03 Layher 4 Standard Site Stair 5 2 5 2 1 Layher 4 More possibilities The Scaffolding System hazardous entrance to such areas should be barred by means of a barrier or other suitable obstruction Children pose a special problem many being injured either through falling or causing the scaffold to col lapse after climbing up scaffo
11. est and criteria for the quality control of the protective paint coating BS 1139 Part 1 Section 1 2 1990 Specification for aluminium tube Requirements and test methods for aluminium tubing used for scaffolds BS 1139 Part 2 Couplers BS 1139 Part 2 Section 1 2 1990 EN 74 1988 IDT Specification for steel couplers loose spigots and base plates for use in working scaffolds and false work made of steel tubes Require ments for materials and design and test procedures for couplers loose spigots and base plates used for connecting steel tubes of 4 3mm outside diameter and of at least 3 2mm nominal wall thickness BS 1139 Part 2 Section 2 2 1991 Specification for steel and aluminium couplers fittings and accessories for use in tubular scaffolding Does not cover steel components in EN 74 which are included in BS 1139 Part 2 Section 2 1 BS 1139 Part 3 1994 CEN HD 1004 1992 Specification for prefabricated mobile access and working towers Covers the design and manufacture of aluminium mobile access and working towers with a height from 2 5m to 12 0m indoors and from 2 5m to 8 0m outdoors BS 1139 Part 4 1982 1990 Specification for prefabricated steel split heads and trestles Specifies materials and performance requirements for steel split heads and trestles as used to provide temporary working platforms BS 1139 Part 5 1990 CEN HD 1000 1988 IDT CEN HD 1000 1988 Specification for materials dimensions design loads and safety requ
12. ibilities The Scaffolding System 16 Proceed in a similar fashion in 2m lifts using the appropriate size standards usually 2m until the top section is reached NOTE The tower is to be tied to the permanent structure as erection proceeds on both inside standards at 4 0m height intervals or as advised by Layher Technical Bureau figure 8 17 For the construction of the top lift see figures 9 10 amp 11 Layout is variable to suit different exit points and variable parts l e either gate closer amp extending ledgers or 2 x console brackets 01 or 2S Ledgers ind Alternative 2nd Clip on paint Ledger se OONN LO of Ho 3 le j Aas Y ve A i j k To SE z Ni T ue e YoY A a FIGURE 8 FIGURE 9 FIGURE 11 eee To facilitate easy access to ledges or obstructions the stair landing platforms can be extended with the use of console brackets Tying in the tie pattern will vary with the expected scaffold usage loading and height as will the expected anchor forces As a general rule and to a height of 60m the external standards of the stair tower should be tied at each 4m vertically Each anchor should be rated to 6 3kN minimum capacity Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 a Valid guide as at 23 08 02 Layher 4 Layher 4 Standard Site Stair Viore possibilities The Scaffolding System
13. ion Health Safety and Welfare Regulations 199 CDM Regulations Workplace Health Safety and Welfare Regulations 1992 Approved Code of Practice L24 ISBN 07176 Health and Safety in construction HSG 150 Safe use of work equipment Provision and Use of Work Equipment Regulations 1998 L22 Electrical Safety on construction sites HSG 141 Health and Safety on Roof Work HSG 33 1999 Manual handling operation Regulations The use of Fall Arrest Equipment whilst Erecting Altering and Dismounting Scaffolding NASC Guidance Note SG4 00 NASC Technical Guidance Notes Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 18 Valid guide as at 23 08 02
14. irements for service and working scaffolds made of prefabricated elements Covers unsheeted anchored prefabricated service and working scaffolds erected up to a height of 30m from ground level Does not include ladder components BS 2482 Specification for timber scaffold boards BS 3913 Specification for industrial safety nets BS 4360 Specification for weldable structural steels BS 4848 Hot rolled80 structural steel sections Part 2 Specification for hot finished hollow sections BS 5268 Structural use of timber BS 5400 Steel concrete and composite bridges Part 2 Specification for loads BS 5555 Specification for SI units and recommendations for use of their multiples and of certain other units BS 5974 Code of practice for temporarily installed suspended scaffolds and access equipment BS 5975 Code of practice for false work BS 618 Code of practice for protective barriers in and about buildings BS 6399 Loading for buildings Part 1 Code of practice for dead and imposed loads Part 3 Code of practice for imposed roof loads BS 8093 Code of practice for the use of safety nets containment nets and sheets on constructional works CP 3 Code of basic data for the design of buildings Chapter V Loading Part 2 Wind Loads CP 118 The structural use of aluminium BS 5973 Code of practice for Access and working scaffolds and special scaffold structural in steel Regulations and Guidelines Building Regulations 1994 Health and Safety at Work Act 1970 Construct
15. l safety rules local regulations and actual site conditions The recommendations of BS 5973 1993 and in particular clause 20 Inspection should always be followed General Criteria e Are all components undamaged and serviceable Are all wedges driven home Has a site specific static calculation been made If so have all specified requirements been met Have warning signs been fixed to incomplete or non inspected parts of the scaffold e Have only original Layher components been used General Safety Rules e Guardrails and toe boards are necessary where persons may fall from height of 2m or more e The distance to the building from the inner edge of platform should be a maximum 30cm otherwise edge protection must be used e n working access bays guardrails and toe boards must be built in Foundations e Do the scaffold foundations conform to BS 5973 Section 11 e Are the sole plates if necessary of adequate area and thickness e Have base plates and base collars been built in e Has the lowest level been braced by ledgers and transoms Anchorage J Has the scaffolding been anchored properly according to the Allround approval or design calculations e Have the wall ties been pullout tested Scaffolding e Ledgers must be built in every 2m in height if no system decks have been used e Facade braces according to the assembly instructions must be fitted Connection of braces is made only on ledger levels e Console brackets 0 73m must be sup
16. lar rosette for fixing ledgers and transoms See fig 1 L Ledger 2 57 or 3 07m U Transom 1 40m C Collar J Base jack FIGURE 1 4 Check the base layout again for squareness line and position relative to the structure or scaffold Select adjustable base on highest ground level then level the base lift from this point using a spirit level on each ledger transom in turn The final required height of the uppermost platform will determine the necessary extension of the base jack When satisfied that base lift is level drive all wedges tight with a hammer minimum 500g See Figure 1 Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 12 Valid guide as at 26 06 03 Layher i Layher 4 Standard Site Stair More possibilities The Scaffolding System 5 Insert 3m standards in to the base collars and connect by 2 ledgers and 2 U transoms at the 2m level Note U transoms only at landing positions All connections are made to the small holes on the rosette Place 2 steel decks in the lower most U transoms leaving space for the stair unit on the required side Fig 1 6 Brace outer face and each end of the stair tower with the appropriate diagonal brace labels on braces show length of bay i e 1 4m 2 57m or 3 07m Fig 2 7 Lift aluminium stair unit into position inserting claws into the U transom at top and bottom Slide to the outside left or
17. lding either by the standards or by easy access at ground level It is essen tial to remove or prevent all ground level access whenever scaffolds are left unattended it is also advis able to fully deck the bottom lift of such scaffolds In addition to the general duties to the public under the Health and Safety at Work etc Act 1974 outlined above persons erecting or using scaffolding in or near public places may also have specific duties under other legislation such as the Highway Act 1971 the Public Health Act 1930 the London Building Amendment Act 1939 and the Building Scotland Act 1959 and advice in such cases should be sought from the appropriate local or highway authority Tools It is essential to use the correct tools when erecting Layher System Scaffolds Scaffold fittings should be tightened to 50Nm torque using a suitable ratchet or swing over spanner 19mm size Wedges should be driven tight using a minimum 500g hammer 1 or 2 good blows with this hammer is adequate to set the joint The following tools are required to erect a Layher System Scaffold 19mm Spanner 500g Hammer Sprit Level Measuring Tape Protection against falls from heights Certain steps of the erection process will inevitably require the erector to work from unprotected parts of the structure At these times the erector must use the an approved safety harness and clip on to the structure at the approved locations indicated in the assembly drawings to fol
18. low NASC Guidance Note G4 00 outlines the general principles which should be followed Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 8 Valid guide as at 2606 03 Layher 4 Layher 4 Standard Site Stair More possibilities The Scaffolding System 5 3 Erection Sequence Note Follow all local and site regulations when erecting the structure Safety harnesses should be worn by all erectors and used whenever work is being carried out from an un protected position 5 3 1 Stair Direction Parallel 1 Position 4 no adjustable base plates on suitable spreaders not supplied by Layher according to the plan dimen sions l e 1 4m wide x 2 57m or 3 07m long 2 Place base collars on base plates 3 Link base collars with ledgers Use a U transom at the foot of the first stair Check carefully the orientation and position of the first stair to assure that the exit from the uppermost lift s is as required Use only the small holes on the base collar rosette for fixing ledgers and transoms See fig 1 L Ledger 2 57 or 3 07m U Transom 1 40m C Collar J Base jack FIGURE 1 4 Check the base layout again for squareness line and position relative to the structure or scaffold Select adjustable base on highest ground level then level the base lift from this point using a spirit level on each ledger transom in turn When satisfied tha
19. ported by braces Boards which are not system decks e g wooden boards or battens are not secured against unintended lift off neither do they provide the structure with adequate plan bracing The consequences of this should be considered Using Allround system decks a lock against lift off must be built in to each U transom Accesses amp openings on deck levels must be protected or covered e Gaps in working platforms must be as small as is reasonably practical we recommend maximum 2cm within main or con sole decks and maximum 8cm between main and console decks Decks or board battens must correspond to the required load capacity scaffold group Ledgers and transoms should have a maximum vertical separation of 2cm Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 17 Valid guide as at 23 08 02 Layher D4 More possibilities The Scaffolding System Layher 4 Standard Site Stair 9 0 References Listed below are a selection of British Standards and Regulations that are applicable in whole or in part to the manufacture use and design of scaffolding This list is not exhaustive and it s provided for information only BRITISH STANDARDS BS 648 Schedule of weights of building material BS 1139 Metal Scaffolding BS 1139 Part 1 Tubes BS 1139 Part 1 Section 1 1990 CEN HD 1039 1990 Specification for steel tube Requirements for the tube and methods of t
20. right according to desired position Fit the internal guardrail by entering the stirrups over the stiles Engage the retaining straps and secure by tightening the 19mm nuts Fig s 3 amp 4 8 Ascend stair to platform and attach 2 ledgers to form double guardrail across tower Fig 4 B Brace L004 75 EG External Guardrail ET Ph gf ees A ET E 6 Guardral Adaptor emoorary Square ra a Si mothe apo a k A i i P Platform Stair uut 257 o 387 IG internal Guardrail 9 Attach 2 guardrail adaptors to the inside of the standard at the foot of the stair attach at 1 0m and 0 5m heights Fit external guardrail unit and secure with wedges Note external guardrail fits over end guardrails at top and over guardrail adaptors at bottom Fig 4 Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 13 Valid guide as at 26 06 03 Layher X4 Layher 4 Standard Site Stair More possibilities The Scaffolding System 10 Lift 1 4m erection decks into position at the 2m level above the installed stair unit lower landing See fig 5 Attach harness to the ledger at 2m height on the guardrail side Ascend to the erection platform using the guardrail and rosettes for hand and foot holds 11 Standing on the erection decks connect 2 ledgers amp 2 U transoms at the 4m level Transfer harness clip to ledger at the 4m level See fig 6 Lift the 2nd stair uni
21. software or traditional methods an outline plan should always be prepared in advance Tip 7 If base jacks are extended beyond the limit necessary to achieve the required capacity they should be braced together using tubes and special base jack couplers Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 16 Valid guide as at 23 08 02 Layher 4 Layher 4 Standard Site Stair Viore possibilities The Scaffolding System Tip 8 For working platforms diagonal braces should be installed in the same direction as it is not possible to fit the brace on the inside of the rosette when decking is present For non working scaffolds it is permissible to install the braces in a zigzag pattern Tip 10 To fit board lock flip hinged plate up and locate hooks in slots at bottom of U transom slide plate in direction of hook so that the cut out engages with the wedge securing the U transom flip down plate so that it engages with the wedge at the other end Tip 11 Toe board loops are staggered if toe board won t fit at one end invert the end toe board 8 0 Inspection Check List The following list is a guide for the acceptance and inspection of Allround Scaffolding and is issued for information purposes without obligation This list does not claim to be complete Every scaffold must be checked individually in accordance with the Allround approval and technical data genera
22. t base lift is level drive all wedges tight with a hammer minimum 500g See Figure 1 Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 3 Valid guide as at 26 06 03 Layher i Layher 4 Standard Site Stair More possibilities The Scaffolding System 5 Insert 4m standards in to the base collars and connect with 2 ledgers and 2 U transoms at the 2m level 6 Brace outer face and each end of the stair tower with the appropriate diagonal brace labels on braces show length of bay i e 1 4m 2 57m or 3 07m See figure 2 7 Lift aluminium stair unit into position inserting claws into the U transom at top first then at the bottom Slide to extreme left or right according to desired position Install 2 decks at the base and 2m levels Fit the internal guardrail by entering the stirrups over the stiles Engage the retaining straps and secure by tightening the 19mm nuts As illustrated in figures 3 amp 4 8 Ascend stair to platform and attach 2 ledgers to form double guardrail across tower b db B Brace 1 40 2 57 or 3 07m G Guard rail adapter Internal guard rail D Decks F Platform stair unit E External guard rail Standards FIGURE 2 FIGURE 3 FIGURE 4 9 Attach 2 guardrail adaptors to the inside of the standard at the foot of the stair attach at 1 0m and 0 5m heights Sequence detailed in figure 4 Fit external
23. t into place so that the lower landing engages into the same transom as the 1st stair upper landing 12 Fit diagonal braces to outside face Two men will be required for this operation 1 on the lower stair landing and the other standing on the erection deck See fig 7 Ind Alternative ard Alternative Clip on Clip on 2 No R320 Decks Adequate access ae iene SZ Adequate access a 2nd Clip on ji 1 af Jrd Clip on paint Ledger d A AT paint ledger ist Clip on point Ledger FIGURE 5 FIGURE 6 FIGURE 7 13 Secure lower stairs by inserting board lock into U transoms at top and bottom platforms To fit board lock flip hinged plate over and locate hooks in slots at bottom of U transom slide plate in direction of hook so that the cut out engages with the wedge securing the U transom flip over plate so that it engages with the wedge at the other end 14 Fix end toe board across platform at 2m level fitting the looped end over the lalo pin and attach the cupped end of the toe board to the opposite standard Figure 7 15 Descend from erection decks at the 2m level and remove them Ascend the 1st stair unit and replace the eretion decks onto the ledgers at the 4m level figure 7 Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 14 Valid guide as at 23 08 02 Layher 4 Layher 4 Standard Site Stair Viore poss
24. use two guardrail adaptors i NEW PARTS 1 5m Lift height stair guardrails INTERNAL GUARDRAIL Constructed from steel and attaches to the stair units with half couplers GUARDRAIL ADAPTOR Steel attachment to take the external guardrail at ground lift level Layher Ltd System scaffolding Roofs and Stairs Works Road Letchworth Herts SG6 1WL Tel 01462 475100 Fax 01462 475101 Layher 4 More possibilities The Scaffolding System LENGTH WEIGHT j PART NO 23 10kg 1751 257 27 50kg 1751 307 0707 501 0714 263 18 00kg 0714 736 19 00kg 0715 968 2 0m lift 14 80kg 1752 000 1 5m lift 14 80kg 0714 737 2637 000 Valid guide as at 26 06 03 Layher 4 Layher 4 Standard Site Stair Viore possibilities The Scaffolding System 4 0 Dimensions Each stair module has a total going of 2 57m or 3 07m and a total rise of 2 00m Horizontal landings are built in at the top and bottom of each stair flight the width of which is determined by the length of stair chosen according to the following table The stair modules are supported by standard Layher transoms of length 1 4m The overall footprint of a completed 4 standard stair is according to the stair module length according to table 1 below Overall Width A Overall Length L a 2 S Note Above dimensions are centre to centre of standard For absolute outside to outside dimensions add 122mm 2570 or 3070 1400
Download Pdf Manuals
Related Search