USER MANUAL
Contents
1. Attachment point for additional legs Rated load attachment point with built in swivel eyebolt Removable Detent pins are stabilisation used to prevent attachment ae ropes or cable from escaping the pulley grooves Attachment point for additional legs A double groove pulley designed to accommodate up to 13 mm fibre rope and 8 mm wire rope cable 4 Qik link pin Detent pin is used for the removable stabilisation Attachment attachment point for B additional when using the D lazy leg with the gin head j lt Leg can pivot 180 Arachnipod User Manual OFERNO O Standard Leg Legs can be connected using Qik link pins The connected joint looks much like a hinge A basic tripod is made up of three standard legs joined with Qik link pins The removal of one Qik link pin allows the tripod to be stored flat for easy transportation Rated load attachment points eyebolts are provided along with an additional attachment point for stabilisation rigging The load attachment point can swivel 360 Pulley Leg A pulley leg can be used in place of a standard leg to add a pulley to a tripod or A frame configuration Other configurations such as a handrail technique are also possible see handrail technique in this manual The pulley has been designed to accommodate up to 13 mm fibre rope as well as up to 8 mm steel stainless steel wire rope cable The stabilisation attach2. Items inspected please tick Tripod Lazy Leg Spare Legs a Bridge _ Reverse Head __ Fall Arrest Block Winch _ Accessory Kit Lazy Leg Extender Kit Detail any items requiring maintenance and action taken Inspected by Inspection Date Signature Print Name Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 40 of 41 Copyright FERNO AUSTRALIA OFERNO Items Inspected please tick Tripod Lazyleg Sparelegs Bridge _ Reverse Head_ Fall Arrest Block Winch Accessory Kit Lazy Leg Extender Kit Detail any items requiring maintenance and action taken Inspected by Inspection Date Signature Print Name Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 41 of 41 Copyright FERNO AUSTRALIA
3. arachnipmac Total Edge Management System User Manual Version 4 0 OFERNO CE Certified to CE 0123 EN795 B in 3 amp 4 leg configurations for maximum 2 persons OFERNO Table of Contents Introduction cceeccccceeeeeecceeeeeecseueceeceeueeeeesaeeeeeseaeeeeeseaeeeessaeeeeseaeeesseueeessaeeeeseseaeeeeeseseeeessanseessaaes 3 2de WOKING OS sassen oaan etal otal ie a E inate niseiae sade sem ioaearesinnntisonouieeiacten 4 DIMENSIONS and WEIGNL cccccceeccccesececceeeccencecceueecseueeceeeecegeeeseueeeseueeessuseessegeeeseaeeesseeeesseeeess 4 Tipod MENTEC ONON eoe E 5 Seea I FAG CC e E E E E E O O E E E OET 7 Principles of Edge Management cccccseeecceeeeeeeeeeeeeneeeseueeeseueeeseueeeseueeesaueeessueeessueeesseeeesseneees i Critical Point Analysis high change Of direction cccccceeeecceeeceeeeeeeeeeeaeeeeeeeeseaeeeeeeeessaeeeeeeeeeas 8 The TWO Rope SYStOM ccccccecccecceeeeeceeeceeeseeeeeeseeeseceeesseeeeeeeeseeeseeeseeeeseeeeesseaseeeeeesaaaeeeessaaesaees 9 Arachnipod AUN eenen AE EE E S 10 PIO SVS EIS EEEE 14 Arachnipod Assembly cccccsescecceeseeecceseeeceeueeeeceaseeeeeeueeeeseaueceeseaseeessaeeeessaeeeeessaeeeessaneesseesans 15 eD APM Prepara e espn ea 15 Step 2 Assemble legS cccceeeccccccceeeeeeeeeceeeeeeeeeeeaeeseeeeesaeeeeeeeesseeeeeeeesseeaeeeeessseaeeeeeessaeeeeeeees 15 Step 3 Tether the Arachnipod and move it into position cccc
4. Pre load Rigging Gin pole plan A gin pole is positioned and rigged so that the resultant forces are being applied close to the long axis of the single leg with a slight offset for two reasons To provide clearance so that the main line does not contact the Arachnipod leg and Arachnipod User Manual Page 28 of 41 2 To ensure that the tension and pre load rigging is clearly identified The tension rigging keeps the gin pole in position and balances out any resultant forces created by the slight offset and the preload rigging keeps the gin pole in position Date 19 March 2010 Copyright FERNO AUSTRALIA OFERNO Using a single leg to manage a handrail A single leg can be used to form a compression member that will help support a handrail If the resultant direction is focused at a point that is just forward of the foot then most of the force will be transferred to the ground by the leg p This technique is recommended for advanced users only WARNING incorrect use of this system could be dangerous An assessment of the handrail is required to ensure that it is suitable for this type of rigging The angle of the leg and the resultant direction must be considered when assessing the handrail Square lashing used here to secure the leg to the handrail e Additional rigging used to stabilise Independent object used as the main line anchor Leg securing ropes or round lashing can be used to provide tension r
5. A E E E E E E E Moca sencte onviiden 32 Care Maintenance and Storage cccccceeccccecssseeceeeeeeeeeeceeeseeeeeeeeeeseeeeeeeseeaeeeeeeessaaeeeeessaaeeeeeeeaas 33 L GYO E a A EEE E EEEE 33 Additional Accessories for your Arachnipod ssssennessrnnrsrrrenrrrrenrrreenrnrrrsrrrrnsrrrennnrrrnnnrrennnne 34 Inspection and Maintenance RECOIdS ccccssscccccseeeccueeceeceeeeeecseeeeeessegeeeesaaneeeeseueeessaeeeessaagss 39 Regular Checking Procedures and INSP CtiON ccccseeecceceeeeceeeeeeeceeeeeeeeeaseeeessaneeeseeeeessaaeess 40 Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 2 of 41 Copyright FERNO AUSTRALIA OFERNO Introduction Congratulations on your purchase of the Arachnipod The Arachnipod is a total edge management system that will empower the end user with a wide range of configuration options The complete Arachnipod TEMS system can be rigged as a Gin Pole mono pole monopod A frame bipod Sideways A frame SA frame Tripod Quadpod Lazy Leg or Easel Leg Tripod Handrail monopod used to support to a handrail Bridge Components can be added or removed as required so that the Arachnipod compliments existing structural or natural features making it the most versatile edge management solution on the planet Ferno understands that rigging is not always conducted on a flat surface or with a clean edge so the Arachnipod was designed with every conceivable task in mind F
6. Plan Arachnipod User Manual Version 4 0 Page 22 of 41 Equipment Pa iy bracket or OFERNO Tension Rigging used to stabilise Pre load Rigging ha i 7 amp 4 gt ff amp AN gt Tension Rigging E gt Pre load Rigging Date 19 March 2010 Copyright FERNO AUSTRALIA OFERNO Lazy Leg Tripod Stabilisation A lazy leg or easel leg tripod is similar to a regular tripod because it uses three legs in compression A lazy leg tripod is constructed as an A frame with an additional leg known as the lazy leg The angle and length of the lazy leg is set so that the resultant force and direction can be managed Some lazy leg tripods will require additional rigging to provide sufficient stabilisation and security If a lazy leg tripod is rigged so that the resultant force and direction is being applied downwards and within the triangular base then the lazy leg ey tripod will remain stable If the load shifts closer to any given leg then the load being applied to that leg increases but the tripod will remain stable Independent object used as an anchor The dotted lines on the ground surface represent the point where the resultant direction is aN focused co lf the resultant force and SE direction is being applied Independent outside of the triangular object used base then the lazy leg gt ANA as an anchor tripod will become Tension n N Bins load
7. configuration The Lazy Leg Extension Kit includes two components that are used to attach an additional standard leg to the lazy leg to provide greater reach WARNING Both the Lazy Leg Extender Head and the Lazy Leg Extender Plate Assembly must be used together The Lazy Leg Extension Kit provides bracing support only and must NOT be used to extend any structural components All the Qik link pins leg pins and the detent pin must be used to ensure that the lazy leg and the additional standard leg are properly supported Lazy Leg f sarachnipwd tie ew te ej Support Bracing gt Plastic keeper to Qik link pin retain the Qik link pins additional standard leg Hinge style attachments for the gt Strength ___ Leg pin Lazy Leg Extender Head Qik link pin Arachnipod User Manual Version 4 0 Page 37 of 41 OFERNO Lazy leg foot detent pin used here Lazy Leg Extender Plate Assembly Standard Leg Remove foot use detent pin Assembly Guide Attach the Lazy Leg Extender Head to the lazy leg Secure with 2x leg pins Remove the lazy leg foot retain the detent pin Attach the Lazy Leg Plate Assembly to the lazy Leg Secure with 1x leg pin and the lazy leg detent pin Attach the extra Standard Leg Secure with 2x Qik link pins and 2x Leg pins Check that the Qik link pins are clipped into t
8. resultant force and direction The dotted lines on the ground surface represent the point where the resultant direction IS focused Resultant Stabilisation i ge gaf Rigging Plan ee gt Tension Rigging i m gt _ Pre load Rigging Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 24 of 41 Copyright FERNO AUSTRALIA OFERNO A Frame Stabilisation An A frame makes use of two legs to form two compression members A frames always require rigging to provide at least one tension member additional rigging can be used to provide two or more tensioned members and pre load rigging can be used to hold the A frame in position A frames can be constructed with Arachnipod components using three methods 1 Standard A frame Two legs positioned perpendicular to the load line Tension and pre load rigging is used to hold the A frame in position This method is ideal for holding span lines off an edge 2 Sideways A frame SA frame Two legs positioned close to parallel with the load line The leg lengths and positions are set so that the resultant direction is focused between the two legs but not in direct alignment with the legs The SA frame is tilted to ensure that the resultant direction remains focused at a point that is offset from the alignment of the legs The dotted lines on the ground surface represent the point where the resultant direction is focused If the tilt is offset to the right then the tensio
9. the resultant forces are being applied downwards and balanced mostly by the A frame legs front elevation The SA frame should be laid over tilted or offset slightly for the following two reasons 1 To provide clearance so that the main line does not contact the Arachnipod components and 2 To ensure that the rigging is clearly identified as being tension rigging and preload rigging The tension rigging keeps the A frame in position and balances out resultant forces created by the lay or offset positioning of the SA frame whereas the preload rigging is used to preload the SA frame and hold it firmly against the ground The load upon the tension rigging increases as the offset is increased Sufficient offset is required to ensure that the tension rigging remains in tension with consideration to any changes in load force direction during the operation Avoid excessive offset because this places unnecessary force upon the tension rigging Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 26 of 41 Copyright FERNO AUSTRALIA OFERNO 3 A frame with a lazy leg Using two legs positioned parallel to the load line held in place with a third leg lazy leg and rigging Although this method is technically a lazy leg tripod it is used in such a way that the lazy leg is only subjected to the tension that is applied by the tension rigging If the lazy leg was lashed into position and tension rigging was omitted then the lazy
10. ch Instruction Sheet 13mm Pulley head oe BS E i in use Attachment A double groove point for i pulley designed S additional to accommodate up legs to 13mm fibre rope and up to 8mm wire rope cable is incorporated into the pulley head The winch must face upwards as shown and the winch cable must always change direction at the head of the tripod or other Arachnipod configuration The winch must only be attached to the middle leg section Change of direction pulley in use A pulley to suit a wire rope application must be used Secure the legs of the Arachnipod see the users manual for more information Middle leg section Leg pins Edge protection Safety Line A working load limit of 220kg is applied when using the winch Winch operations must be A back up or safety line stopped when the red with edge protection must marker becomes visible always be used Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 35 of 41 Copyright FERNO AUSTRALIA OFERNO qJ 7 Instruction Sheet arachnipwe ISC UB171 Fall Arrest Adaptor Bracket This adaptor bracket is used with the ISC UB171 Type 3 Fall Arrest Block with retrieval capability The fall arrest block must be attached to this bracket as per UB 171 manufacturer instructions Middle Nay C Users to be trained by a competent leg section person or training organ
11. d for stability There are many factors that can change the physics of the edge management task and as such the stability of the Arachnipod must be constantly monitored If any instability is detected then the safety line can be set to safely hold the load whilst adjustments are made Anchoring the Arachnipod The number of anchors that will be required depends entirely upon the configuration of the Arachnipod Safe and secure anchors will be required for The main line The safety line Edge safety lines for persons working close to an edge The initial rope lanyard or tether used to secure the Arachnipod Each tension line and Each pre load line Anchor selection and anchor rigging techniques are not within the WARNING scope of this manual Using an Arachnipod leg as an anchor DBW N The Arachnipod equipment bracket can be used to provide a rated attachment point that connects to a leg of the Arachnipod Anchoring to a leg is useful in many situations including tripod applications The safe working load is reduced to 220kg when a leg is used as an anchor The equipment bracket is designed to be attached to the middle telescopic leg an Ti Change of WARNING Equipment a direction pulley bracket ee ttach t The rigging must include a a ao change of direction at the head section only when an equipment bracket is being used as an anchor gt Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 19
12. dless of the configuration being used Every change of line direction will create a resultant direction In this AN NOTE example above the resultant below the load is directly relating to the stability of the bridge A Bridge Ratchet Strap Stabilisation Kit is available as an optional extra refer page 34 onwards Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 30 of 41 Copyright FERNO AUSTRALIA OFERNO Foot Options for your Arachnipod Standard Foot A polyurethane tread molded around an aluminium foot The standard foot is ideal for flat surface applications Spike Foot A pointed aluminium spike with a replaceable stainless Steel tip The spike foot is ideal for point loading and ground penetration applications Soft Ground Shoe A hard polyurethane disc that is used in conjunction with the spike foot to limit ground penetration in soft ground applications Hold Down Stakes A steel picket with an impact plate and a locating pin The steel picket is driven into the ground after aligning the locating pin with a hole in a standard foot This secures the foot to the ground Tru bolts Tru bolts are supplied in the accessory kit Tru bolts can be used in place of hold down stakes to secure the foot to concrete and other hard rock surfaces Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 31 of 41 Copyright FERNO AUSTRALIA OFERNO General The Arachnipod is used for secur
13. ection in this manual titled Assessing the stability of your Arachnipod rigging Using hand tension a simulated force can be applied by to the main line to visualise the resultant direction The positioning of the head and the length of the legs can now be modified so that the resultant direction is located appropriately Step 8 Provide additional rigging as required Add additional tension and pre load rigging as necessary to ensure stability Apply tension to all Stabilisation rigging as required then check the Arachnipod for stability Step 9 Rig a two rope system wherever possible Rig a two rope system to provide a backup to both the main line and the edge management rigging Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 18 of 41 Copyright FERNO AUSTRALIA OFERNO Step 10 Carry out a safety check Visually check all anchors rigging karabiners friction devices harnesses and personal protective equipment before committing anyone to the edge Edge safety lines must be provided for any persons who are working close to the edge Step 11 Weight the system and recheck the resultant Before committing a load to the edge the system should be weighted in a safe manner for example backed up with a safety line and the resultant re checked This step should be carried out in a manner that allows retrieval of the load if adjustments to the configuration or rigging are needed Step 12 Monitor the Arachnipo
14. ed into the lazy leg tube and locked into position with a detent pin The Gin Head can also be used as a large rigging plate when not used in a gin pole configuration Qik link pins used to lock the rigging plate into h position AE ek a Rigging Plate h t A rigging plate is used when two legs are D Mt connected as an A frame It is used to Holes for provide additional stabilisation attachment stabilization points and is not for live loads of A frame Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 11 of 41 Copyright FERNO AUSTRALIA Leg pins Three telescopic leg sections Detent pin Lashing holes Foot socket Spike foot stainless steel tip Soft ground shoe t N A Standard Foot Foot Lo locating spike Hold Down Stake A NOTE Arachnipod User Manual Version 4 0 Page 12 of 41 OFERNO Leg with a Standard Foot All legs have three telescopic sections that are locked with two leg pins The foot options are held to the base of the lower leg with a detent pin A standard foot is ideal for flat surface applications Lashing holes in the standard foot are provided for the leg restraint rope or other lashing technique Unused lower leg holes can also be used with the leg restraint rope or for other lashing techniques Spike Foot and Soft Ground Shoe A spike foot can be used for point loading and ground penetration applications A sta
15. eseeeeeeeeeeeeeeeeeeeeeneeeeeeeaeeees 17 Ss E BAS E E E E 17 Step 5 Position the lS ceeeccccccssesseeceeeeeeeeceeeeeeeseceeeeseeseeeeeesseaseeeeessaaaeeeeeesseaeeeeeessaageeeeees 18 otep Os Secure Ne leg gece cca ssecendeaesennes cece seus spcecsdanecesoaeaseesnmenassanceesooanesnmessacoseameeueaneneessessene 18 Step 7 Assess the resultant force and direction cccccceccceeeceeeeeeeeeeeeeeeeeeeesaeaeeeeeeesaaeeeeeees 18 Step 8 Provide additional rigging AS required cccccceseeeeeeeceeeeeeeeceeeueeeeeeeseaaeeeeeesaeeeeeeees 18 Step 9 Rig a two rope system wherever possible cccccceecceeeeeeeeeeeeeeeeeeeeeaeeeeeeeeesaaneeeeees 18 Step 10 Carry out a Safety CHECK cccccceccecceeceeeeeeeeeeeeeeeeeeesseeeeeeeeessaaeeeeessseaeeeeessaegeeeeees 19 Step 11 Weight the system and recheck the resultant cccccccseecccceeeeeeeceeeeeeeseeeeeesaeeees 19 Step 12 Monitor the Arachnipod for stability ccccccccseseceeeeeeeeeeeeeeeeeeeeeeeesseeeeeessaeeeeeees 19 Anchoring the AraChinipod cccccsseeccsseeeceeeeeceeeeeeeeeeeeeeseeseueeeseueeeseueeeseueeeseueeeseueeesaeeeesaneeessaes 19 Using an Arachnipod leg as an anchor cccecccccseeececeeeeeeeeneeeeeeaeeeeeeseueeesseeeeeeesaeeeessaeeeessaenees 19 Understanding the forces being applied to the Arachnipod cccccceeecceeeeeeeeeeeeseeeeeseeeesaneees 20 Assessing the stability of your Arachnipod riQQin
16. g ccscccsssececseeeeseeeeceeeeeseseeeeseeeeseeeesaneeesaes 20 TMOG SlA DIWIS AVON oes cccxcesssencceeeedasesosbossecreseseeayeanctee song Raar a naaa raia a Tan ra aTe a ER Ranra rurik 21 Tripod Stabilisation cceccccccsseeecceeceeeeeeeeeeeeeeeeceeeeeeeeeeeeseeeeeeeeesseeeeceeeesaasseeeeesaeaseeeessseaeeeseeeessaess 22 Lazy Leg Tripod Stabilisation ccccccccccsseecceecseeeeceeeesaeeeeeeeseeeeeeeeeseeeeeeeessaaeeeeeesseeeeeeessaageeseees 23 WARD OG Sia INS ATO eessen eE a E E E E EE 24 A Frame OMS AON seitecncasessenrncrasinsienrssoteetenn sees oecntieuureseionnuiatirrssinsinkiewuvtsuinnenietsatrasiateeseisesteuonenmeaurensnasueaeseds 25 Gin Pole Sta ISAM OM sessg20535ass052005505seses0se550008080009sbangbancbaseseedbaeasesebaneboeebarehasssneabencboereaeoceeeeteene 28 Using a single leg to Manage a NANArall ccccseeccccceeeececeeeeeeeseeeeeseeeeeeeeegeeeeessegeeeseeeeeessaneees 29 Bridge Stabilisati n ocecssoec cece cncase sete sncesetnte sed edebune bce terwhesedede adebedelesulessbesidetesoseaisBecebeeeiereadtsieeseeme 30 Foot Options Tor your ArachniDod seirene aiai ai aani aE aE 31 EEn E e EEE EENE E E E T TT T A E E EATE 32 Inspection of the Arachnipod ccccccsseeeeceeeeeceeeeeceeeeeseeeeeceueeeseueeeseueeessueeeseueeeseueeesseeeesaaeeeeeaes 32 Safety Information cccceececceeceeeeeeeeesaeeeeeeeeeaeeeeeeeeseaeeeceeeeseeaeeeeeesseeeeeeessaaeeeeeeesssaaeeeeeesessaeeeeees 32 FRO aN E E E E
17. gh change of direction oO Edge canal Oe wv Approx Fall Distance Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 8 of 41 Copyright FERNO AUSTRALIA OFERNO The Two Rope System A two rope system provides additional safety by backing up the main line and any edge management systems The second line or safety line is rigged to take the shortest path from the anchor to the load a Main Line Safety Line NIN A When the load is located below the edge the safety line provides protection for both main line and edge management failures When the load is located above the edge the safety line provides limited protection for main line failures ea Anl y e Safety Line me ji i E The Arachnipod can be rigged with the main line passing over the pulley head and a rated hauling system can be used to progressively pick the safety line up as the load is raised This process provides additional protection against a main line failure Ferno can supply properly rated and pre rigged hauling systems that are suitable for this task Edge protection should also be provided to protect both lines WARNING against edge trauma Ferno can supply a range of edge protection solutions Edge Protection Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 9 of 41 Copyright FERNO AUSTRALIA Arachnipod Parts Stabilisation Qik link pin Attachment point D shackle
18. he assembly guide Parallel Oe Leg Pin WARNING Legs must be prevented from Accessory splaying apart when loaded Attachment Damage to the Arachnipod may Hole result if the legs are not properly S secured Please read the Arachnipod Lazy Leg user manual for more information Top Section Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 38 of 41 Copyright FERNO AUSTRALIA OFERNO arachnipnai Inspection and Maintenance Records Record serial numbers and commission dates in the table below Serial number Date commissioned into service i ee i ta ma aaam Ee a Reverse Head AP rss r S Extender Plate assy Arachnipods should be decommissioned from service after a maximum of 12 years from the date of commissioning into service However if the date of commissioning into service is not recorded the unit should be decommissioned from service after 12 years from the date of manufacture Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 39 of 41 Copyright FERNO AUSTRALIA OFERNO Regular Checking Procedures and Inspection The unit must be inspected before and after every use by the operator the unit must also be inspected by a competent instructed accredited person at least once a year to ensure the unit is fully functional Details of this inspection are to be recorded in the following table please make additional copies of this inspection sheet as required
19. he moulded plastic keeper to ensure pin security Date 19 March 2010 Copyright FERNO AUSTRALIA OFERNO arachnipwaa Lazy Leg Adaptor Plug Instruction Sheet A Lazy Leg Adaptor Plug is used to convert a lazy leg into a standard leg It is supplied with a detent pin that is used to secure the Lazy Leg Adaptor Plug into position Once fitted to the lazy leg the Lazy Leg Adaptor Plug provides a stop so the leg can only rotate 25 degrees Assembly Guide Lazy Leg Adaptor Plug Detent Pin Note It is easier to fit the Lazy Leg Adaptor Plug before the lazy leg is attached to any other legs 1 Remove the top leg pin and extend the middle leg section to provide space for the Lazy Leg Adaptor Plug See the cross sectioned view 2 Remove the detent pin and the stabilisation attachment point D ring 3 Rotate the leg so that it is positioned parallel to the gt head as shown 4 Remove the detent pin PRENE EME and insert the Lazy e e A Leg Adaptor Plug ii S gt 5 Insert the detent pin through the accessory attachment hole to secure the Lazy Leg Adaptor Plug 6 Refit the stabilisation _ attachment point D ring 7 Set the leg length and Stabilisation refit the leg Attachment pin Point D ring This cross sectioned view shows that there is insufficient space to fully house the middle leg section when using Lazy Leg Adaptor Plug see step 1 in t
20. ible and can be attached to the inside or the outside of a leg A leg pin is used to secure a step into position Steps do not carry a rating for any load applications Before using a step you must ensure that you are secured with suitable height safety rigging and personal protective equipment Bridge Beams and Trolley Bridge beams are available in lengths up to 6 m refer SWL table on page 4 for load rating They add a spanning capability that is well suited to trench rescue and confined space applications A trolley is fitted to the bridge beam The trolley is hauled back and forth along the beam using the trolley positioning line This is a Single person operation An English Reeve is recommended because it negates the need for any additional trolley stabilisation A tie off point has been included to facilitate English Reeve rigging A mechanical advantage hauling system can be suspended directly from the trolley as long as it includes an integrated braking system to remove lateral forces at times other than when being raised or lowered The Ferno CSR pulley kit available separately is a pre rigged 4 1 mechanical advantage system incorporating a brake and a remote release for raising and lowering j Numerous bridge beam spans are available The trolley positioning line is used for positioning of the trolley If any other rigging systems are used then the resultant forces must CAUTION _ be considered and add
21. igging that keeps the single leg in place Square lashing can be used to secure the leg to the hand rail Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 29 of 41 Copyright FERNO AUSTRALIA OFERNO Bridge Stabilisation A bridge make use of four legs that are all in compression and a bridge beam that spans between two sets of two legs Additional rigging must be used to increase the fA une AA ction 8 English Reeve Co rigging must X l be used to stability of i increase the the bridge stability of the bridge Equipment bracket used as an anchor y Er The resultant that is a naa directly relating to the gt gt __ _Stability of the bridge Additional security must be used for the feet to prevent movement as shown gt Stabilisation y gt Tension Rigging Rigging Plan E gt Pre load Rigging y lf a bridge is rigged in so that resultant force and direction remain within the rectangular base then the bridge will remain stable The strength of the bridge beam and the four legs balances the resultant force If the load shifts closer to any given leg then the load being applied to that leg is increased but the bridge will remain stable Additional rigging must be used to protect against any unplanned shifts in resultant direction Instability will occur if the resultant direction moves outside of the rectangular base Always consider the stability of the feet regar
22. ing persons that work in confined spaces where a fall from height may occur specifically in areas such as tanks shafts trenches mountain cliffs and voids or confined spaces that need entering The use is limited to persons who are physically fit and have been instructed in the proper safe use of the product as well as obtaining the correct necessary knowledge in the use of the of the product In order to rescue a person that has been involved in a fall or incident accident a full emergency rescue plan must be implemented to consider all possible implications and situations that may occur during the rescue Inspection of the Arachnipod Equipment should be inspected regularly before and after each use by a qualified person Record the date of the inspection and the results in the equipment log Each user should be trained in equipment inspection and should carry out an inspection before each use Inspect the Arachnipod for cracks dents or elongation of the karabiner and pin holes The legs should fit together smoothly and should not appear bent or deformed Pins should have the retaining hardware present and must function freely Inspect plastic parts for wear or chemical damage lf any significant damage is observed the equipment should be removed from service lf there is any doubt regarding the safety of the equipment it should be removed from service and retired Safety Information lf the Arachnipod has been subjected to impact o
23. inless steel tip has been added to extend the service life of the spike foot The spike foot inserts into the foot socket and is held in place with a detent pin The soft ground shoe fits over the spike foot and clips to the foot socket It is used to limit ground penetration in soft ground applications Hold Down Stake A hold down stake can be used to secure a standard foot to the ground The foot locating spike lines up with one of the holes in a standard foot Taking care not to impact against the Arachnipod foot or leg hammer the hold down stake half way into the ground Check the alignment of the foot locating spike then continue to hammer the stake into the ground A soft faced or shot filled hammer is recommended for this task Maintain the alignment of the foot locating spike and the hole in the standard foot whilst hammering the hold down stake into position Date 19 March 2010 Copyright FERNO AUSTRALIA OFERNO Attachment Equipment Bracket point The equipment bracket must only be used when attached to the middle telescopic leg section The safe working load of the Arachnipod is reduced to Leg pins 220 kg when a leg is used as an anchor This attachment point is only to be used if the main line passes through a change of direction pulley at the head of the tripod steps Steps can be attached to the middle and the lower leg sections They are a useful aid when reaching high rigging They are revers
24. ipod Kit Contents ae Industrial Plus Industrial Plus Tripod Advantage Tripod a a a a Arachnipod Bag Rigging Plate a a a Spike Feet S d e Quad Plate Pt S S o ReverseHead ooo d S t e o sai o a a Full Full Accessory Kit Kit 2m Bridge Kit in Bag with el Leg and Foot Tether Rope Extra legs and all accessories can be ordered separately to suit custom requirements Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 5 of 41 Copyright FERNO AUSTRALIA OFERNO Optional Extras Units Extra length bridge kit with bag Stainless steel bearing upgrade for bridge kit Additional Pulley Leg Full Accessory Kit contents Accessory bag Spike Feet Gin Head Soft Ground Shoes Hold Down Stakes M12 Tru bolts pea Lazy Leg Kit Lazy Leg a M12 masonry drill bit Reverse Head a Lazy Leg Bag a ss i Spare detent pins Note Gin Head available as optional extra Spare leg pin with detent pin Steps Winch kits 6 mm cable Equipment Bracket 10 m winch and mount Rigging Plate 20 m winch and mount Refer to page 34 onwards for additional accessories Quad Plate Lt 8 2 Spare Qik link head pins 2 2 2 ooo 1 WARNING Activities conducted at height can be dangerous resulting in injury or death Do not use this device unless you have Read and understood the users manual Received appropriate training Ensured a competent person has conducted a risk a
25. isation in the use of this product Attach the bracket to the middle leg section with two leg pins secured with lynch pins Leg pins Pulley head F Fibre rope Wire rope groove in use Wa m PS The fall arrest block must face upwards as shown and the cable must change direction at the head of the tripod or other Arachnipod configuration Attachment point for additional legs This example shows a winch being used as the primary device to raise and lower a load The ISC UB171 Type 3 Fall Arrest Block is being used as a backup or secondary device with a retrieval capability must only be mounted onto the middle leg section of the The Arachnipod would normally be used in a tripod Arachnipod configuration for this type of work Al The third leg was omitted from this example for the purpose of clarity A Please refer to the Arachnipod manual for additional as hia apes t configurations and rigging examples Always secure the legs of the Arachnipod and stabilise depending upon the configuration being used Refer to the Arachnipod manual for more information Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 36 of 41 Copyright FERNO AUSTRALIA arachnipwaca Lazy Leg Extension Kit Instruction Sheet A lazy leg is used to provide additional bracing support to an A frame it can act as both a tension or compression member It does NOT provide the structural strength of the
26. itional stabilisation of the trolley and the bridge is required Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 13 of 41 Copyright FERNO AUSTRALIA OFERNO Bridge Systems Pulley sideways Tie off point fixed bar Trolley positioning j line is to be tied off after the position is set Tie off point fixed bar Main Line Inset A and B show the tie off point and the trolley positioning line pulleys gt Additional stabilisation rigging A safety line takes the shortest path to the load Trolley positioning 3 line is to be tied off after the position is set Mechanical Advantage Pulley Kit Haul Line Edge protection A safety line takes the gt Additional shortest path to the load stabilisation rigging A bridge with a mechanical advantage hauling lowering system and an integrated brake A gt Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 14 of 41 Copyright FERNO AUSTRALIA OFERNO Arachnipod Assembly The assembly and rigging process for the Arachnipod depends upon a number of factors including e The type of Arachnipod kits available e The configuration to be used and e The rigging experience of the user lt is recommended that two or more people work together to assemble the Arachnipod components as follows Step 1 Preparation Select the most appr
27. leg would be subjected to some tension The tension rigging is used to apply some pre loaded force onto the lazy leg The tension rigging and or the lazy leg is used to support the SA frame and the legs of the SA frame are in compression This method is ideal when there are no anchors available for pre loading on the low side of the A frame Tension Rigging used to stabilise The leg may also be lashed onto a secure object For Ca Main Line Resultant stabilisation Rigging Plan gt Tension Rigging Arachnipod User Manual Date 19 March 2010 Copyright FERNO AUSTRALIA Version 4 0 Page 27 of 41 Tension Rigging Gin Pole Stabilisation Tension Rigging used to stabilise Pre load M 7 Rigging Main Line c D Secure foot to gt prevent movement this way Pre load Rigging e i s m Gin pole front elevation OFERNO O A gin pole mono pole monopod makes use of a single leg to form the compression member Gin poles always require rigging to provide at least two tension members additional rigging can be used to provide three or more tensioned members and one or more pre load members to hold the gin pole into position Main Line Secure F foot to a prevent u i movement this way Resultant is straight down at this point Tension Rigging used to stabilise Pre load Rigging Force gt Tension Rigging gt
28. ment point is removable Lazy Leg The lazy leg is coloured blue for easy identification It has a pivot range of 180 A lazy leg is used with a reverse head quad plate and two other legs to build an A frame with lazy leg and it is used with a gin head to build a gin pole Additionally the lazy leg adapter sold separately can be placed into the lazy leg to convert it to a standard leg Date 19 March 2010 Version 4 0 Page 10 of 41 Copyright FERNO AUSTRALIA OFERNO Reverse Head Quad Plate and Attachment point to legs Quad Pod Quad Plate A quad plate is used whenever four legs or heads are used together such as a quadpod or lazy leg configuration Stabilisation _ attachment point tr A reverse head is used to change the angle between legs and is used when a lazy leg configuration is required Rated load attachment points When using a reverse head and whenever Quadpod A frame with Lazy Leg possible loads should be attached to the ox ne large D shackle to centralise the load eraa Xe between the two opposing legs Detent pin Gin Head is used to lock the gin head Sq Gin Haar with The gin head is used with a lazy leg to form in position holes for main a gin pole Both parts are coloured blue load attachment making the leg selection an easy task and stabilisation Before connecting the gin head the head on the lazy leg must be rotated 180 The gin head is then insert
29. n rigging will need to be on the left If the tilt is offset to the left then the tension rigging will need to be on the right The feet will need to be securely located or lashed into position to resist lateral movement All rigging should be adjustable so that tensions can be modified as required Arachnipod User Manual Version 4 0 Page 25 of 41 Tension Rigging lt used to stabilise P a k S Pre load Rigging Independent object used as an anchor stabilisation Rigging Plan gt Tension Rigging GE Pre load Rigging inn Tension Rigging used to stabilise Pre load Rigging i Force Main Line Force Resultant a stabilisation Rigging Plan gt Tension Rigging E gt Pre load Rigging 1 Date 19 March 2010 Copyright FERNO AUSTRALIA OFERNO Offset lt Offset aaa be Main Line Secure E gt feet to oe Tension Rigging prevent gging used to stabilise movement v this way i D LL Main Line Resultant is straight down at this point Pre load Rigging 47 Tension Rigging Iy N used to stabilise Resultant Force gt Tension Rigging si Secure gt Pre load Rigging gt Il feet to Tension Rigging i prevent t Secure movement feet to Athis way prevent Pre load Rigging movement this way SA Frame front elevation SA Frame plan When rigging an SA frame
30. ngular base the triangle formed by the leg securing rope then the tripod will remain stable If the load shifts closer to any given leg then the load being applied to that leg increases but the tripod will remain stable Tension Rigging used to stabilise Rigging Es fal y amp on al A a Stabilisation Rigging Plan gt Tension Rigging gt Pre load Rigging Pre load OFERNO Resultant Force YW a lf the resultant force and direction is being applied outside of the triangular base then the tripod will become unstable Additional rigging will be required to maintain tripod security Some of the rigging will remain under tension and other rigging may be used to preload the edge management system Date 19 March 2010 Arachnipod User Manual Page 21 of 41 Copyright FERNO AUSTRALIA Version 4 0 Tripod Stabilisation This tripod application does not require any additional rigging because the resultant force and direction is within the triangular base The dotted lines on the ground surface represent the point where the resultant direction is focused winch used as an anchor Independent object used as an anchor This tripod application requires additional rigging to counteract or balance the resultant force and direction The dotted lines on the ground surface represent the point where the resultant direction Is focused Stabilisation Rigging
31. of 41 Copyright FERNO AUSTRALIA OFERNO Understanding the forces at a change of direction pulley Most edge management tasks require the use of a pulley or pulleys to change Ka the direction of the load line Correct assessment of the loads being applied to W these pulleys and the ability to determine the resultant direction is essential when selecting the most appropriate edge management system and rigging An applied force has magnitude and direction A change of direction pulley is subjected to two forces 1 The weight of the load and 2 The force required to manage that load The force that is required to manage the load will vary because of S friction go A a The resultant force bisects the two applied forces A good indicator of resultant direction is to look at the direction of the pulley and attachment hardware Resultant Force Understanding the forces being applied to the Arachnipod The Arachnipod or any other edge management device is subjected to resultant forces and directions To keep edge management devices or rigging in place the resultant forces and directions being applied must be assessed and sometimes additional rigging will be required to provide stabilisation In simple terms if all of the forces are balanced then the Arachnipod will remain stable We can use various Arachnipod components and rigging to balance the forces as follows 1 The legs of the Arachnipod system are generall
32. on the individual operational conditions of each unit The maximum lifespan of the unit is 12 years however this would be dependent on many factors such as frequency of use actual conditions of use care and maintenance of the unit weather and environmental conditions etc The unit could be withdrawn from service before or after a specific use or on inspection during the mandatory annual review and therefore the lifespan of the unit is immediately terminated and must be removed from service immediately Each unit has a date of manufacture on the individual components Once the date of manufacture reaches 12 years the unit must be removed from service and be destroyed accordingly Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 33 of 41 Copyright FERNO AUSTRALIA OFERNO Additional Accessories for your Arachnipod All sold separately APOD W20 APOD FA Winch with 20 m cable Fall Arrest Block with Retrieval Winch Winch with bracket to mount to middle Fall arrest block with bracket to mount section of any supporting leg to middle section of any supporting leg SWL 220 kg 485 Ib SWL 136 kg 300 Ib APOD EKLL APOD LLA Extension Kit for Lazy Leg Lazy Leg Adapter Extends the length of Lazy Leg by 1 7 m 67 Converts a Lazy Leg into a Standard Leg Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 34 of 41 Copyright FERNO AUSTRALIA OFERNO arachnipw lt Pa Wh ppv uprte Bimm up to Win
33. opriate Arachnipod configuration for the task Establish a staging area where the Arachnipod components can be laid out A staging area is a location that is in a safe area away from the fall hazard A clean tarp is a useful tool for staging Carry out a pre operational check of all equipment and do not extend the legs until the heads are connected Step 2 Assemble legs _ a eB i If more than one leg is required stand Bring the remaining head joints together and fit the legs in an upright position next to each the last Qik link pin other align the hinge cut outs and insert the Qik link pins Check all Qik link pins to ensure that they are fully engaged into the head joints Push down If rigging plate quad plate is required it must be until they are retained by the spring clip positioned prior to inserting Qik link pins Repeat this process for any further legs that are required for your desired system Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 15 of 41 Copyright FERNO AUSTRALIA OFERNO Spread the legs until they reach maximum angle Tripods will stand up unassisted if on a flat surface but other applications may require support until the rigging has been completed If a bridge is being used it can be connected to two sets of A frames at this time K Quadpod A Frame with Lazy Leg A 4 leg and quad plate can be added to create a quadpod A
34. r a fall it is to be withdrawn from service immediately and must be tested and inspected by a suitably accredited qualified person or the supplier of the system Please be aware that extreme temperature chemicals and rough handling of the system may cause damage Repairs Any repair work must be done by the manufacturer or accredited agent Any other repair work or modifications will void the warranty The Arachnipod has been engineered and tested using the hae WARNING original equipment as supplied Never replace any pins bolts or other components with non genuine parts Do not use your Arachnipod if any parts are missing For service or repairs please contact your local Ferno Distributor or Ferno Australia Phone 61 7 3881 4999 Email sales ferno com au www ferno com au Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 32 of 41 Copyright FERNO AUSTRALIA OFERNO Care Maintenance and Storage Wash the unit with warm water and soft detergent soap Rinse with clean water Leave unpacked unit in a warm dry well shaded and ventilated place to dry Do not use additional heat sources or blowers to dry the unit Avoid contact with chemical oils solvents and other aggressive corrosive materials or agents Once cleaning is complete Store unit in bag and store at room temperature away from direct sunlight If unit requires any further maintenance contact your supplier for further details Life Cycle This is dependent
35. red g point to lec Gin Pole at 2050 mm 280 kg 616 Ib 27 5 kN extension Gin Pole at 3050 mm full 150 kg 330 Ib 14 7 kN extension A frame or A 1 280 kg 616 Ib 27 5 KN Offset A Frame or B 2 340 kg 784 Ib 33 4 KN A Frame with lazy leg C 3 400 kg 880 Ib 39 2 kN i enor NOTE If bridge beam has Strongbac fitted SWL for bridge beam becomes A 280 kg 616 Ib at any length up to 6000 mm 19 8 SWL for bridge trolley is 250 kg 550 Ib ultimate strength 24 5 kN Dimensions and Weight tem Storage Marlengh Weight Standard leg 1420 mm 56 3050 mm 120 8 6 kg 19 Ib Pulley leg 1550 mm 61 3150 mm 124 10 kg 22 Ib 370 mm x 130 mm x 1420 mm 14 6 x 5 1 x 56 see leg lengths 25 8 kg 57 Ib 370 mm x 130 mm x 1550 mm Tripod with pulley head 14 6 x 5 1 x 61 see leg lengths 27 2 kg 60 Ib Taped ba 380 mm x 150 mm x 1600 mm p 9 15 x 6 x 63 ecacconeaisa 400 mm x 200 mm x 660 mm g 15 7 x 7 9 x 26 Bridge bag 2 m 300 mm x 160 mm x 2150 mm 11 8 x 6 3 x 84 7 A Throughout this manual 1 Ib pound 0 453 kg and 1 kg 2 2 Ib Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 4 of 41 Copyright FERNO AUSTRALIA OFERNO APACHMUIPINA ripoa ana xit contents Arachnipod Tripods Tripod style Industrial Plus Advantage Standard Leg Sie ee a S S tayo Lazy Leg AdapterPug oo Sandara Arachn
36. reverse head and a quad plate can be added to change the angle between two legs to 180 NOTE A reverse head and a quad plate must always be used for an A frame A with lazy leg A quad plate must always be used for a quadpod Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 16 of 41 Copyright FERNO AUSTRALIA OFERNO A rigging plate is recommended for use with an A frame to provide additional stabilisation of the unit during use e gt ra En CAUTION Double check ALL connections before proceeding to the next step A Frame Step 3 Tether the Arachnipod and move it into position Tethering is not to be confused with stabilisation Tethering simply stops the equipment from being dropped over an edge whereas stabilisation stops unwanted movement whilst the equipment is being used These holes can be used to tether the Arachnipod Tether the Arachnipod with a rope to prevent it from being dropped over an edge Once the Arachnipod has been tethered it can be moved into position Step 4 Extend the legs Do not place fingers Extending the legs can be achieved by removing into leg pin holes both leg pins from the legs and adjusting the legs to the desired height This can be achieved by one person moving from leg to leg and making small adjustments or with multiple persons all l adjusting their respective leg simultaneously Leg pin holes It is easier to adjust the height of the legs
37. rom the harshest vertical rescue conditions to a simple tripod for a confined space entry task the Arachnipod will provide the flexibility that end users demand The versatility of the Arachnipod will appeal to a wide range of end users including rescuers mines rescue industrial rope access workers construction and film industries The end user can purchase as little or as much Arachnipod hardware to suit their scope of operations making the Arachnipod an edge management system that is both affordable and upgradeable to suit changes in operational needs With the appropriate training the Arachnipod can be used in a variety of configurations and in any number of environments from wilderness applications to industrial rope access scenarios Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 3 of 41 Copyright FERNO AUSTRALIA OFERNO Safe Working Loads The typical weight of a single person load ranges from 80 kg to 120 kg 176 Ib to 265 Ib depending upon a number of factors The SWL of the Arachnipod exceeds this load in all configurations The weight of a rescue load typically ranges from 200 kg to 280 kg 440 Ib to 617 Ib depending upon a number of factors The Arachnipod offers many configurations that match or exceed the 280 kg load with only a few exceptions The table below outlines the safe working loads of the Arachnipod in various configurations Le SWL Ultimate SWL eae external anchor Strength load ancho
38. ssessment for the specific task Carried out a pre operational check of the Arachnipod associated hardware and rigging before each use Accepted total responsibility for your own safety and Proof tested any drilled in anchorages in accordance with local standards A DO This manual is not intended as a substitute for appropriate training Training practice and experience in technical rigging are essential for safe use The Arachnipod and associated hardware must always be secured to prevent it from falling over an edge The Arachnipod may become unstable if used without an assessment of the resultant force and direction Additional rigging may be required to ensure complete stabilisation A primary rope or cable system with an independent safety back up system must be used when loaded life lines are rigged through any edge management device Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 6 of 41 Copyright FERNO AUSTRALIA OFERNO Safe Working Practices WPS p Do not exceed the safe working load for the given application Always maintain a safety line independent of the main line All Arachnipod feet must be secured to prevent unwanted movement It is a good practice to ensure that all rigging is capable of holding the entire weight of the main load Always provide height safety and fall prevention for personnel working close to the height risk Principles of Edge Management Edge management is the a
39. ssessment of the rigging task to ensure that the load can be maneuvered over the edge Rigging to provide a high change of direction is the key to successfully managing an edge The Arachnipod is a tool that can be used to achieve a high change of direction A A A Edge Edge Management Management Problem Solution Total Edge Management Solution Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 7 of 41 Copyright FERNO AUSTRALIA Critical Point Analysis high change of direction A critical point analysis is the assessment of all rigging regardless of the equipment brand A or type The purpose of a critical point analysis is to determine if the rigging relies on any single point to provide operator safety The Arachnipod if used correctly will provide an efficient and safe edge management system but not all aspects of the rigging and equipment use can be guaranteed by the manufacturer Many factors such as edge instability anchor insecurity misuse persons who are not fully competent user error abuse and the use of other equipment could result in a system failure The diagram right shows how failure of a high change of direction edge management of a single rope system would subject the load to a fall The seriousness of the fall will depend upon many factors including the height of the change of direction and the length of rope that is between the load and the anchor A Failure at hi
40. unstable Additional rigging Rigging a Rigging will be required to provide moet lazy leg tripod security The length and position of the lazy leg may be adjusted to assist with the management of the resultant direction The dotted lines on the ground surface represent the point where the resultant direction is i i 4 T L L i A U N my i pal P Ve ba TA 7 J L ji 1 i I a k E L i m PAR E j a rity _ Ril a _ EA E ae J i 3 g i F e W _ 4 TES 1 f gt Tension Rigging ocused Stabilisation E Pre load Rigging Rigging Plan Arachnipod User Manual EE Version 4 0 Page 23 of 41 Copyright FERNO AUSTRALIA OFERNO Quadpod Stabilisation The Quadpod allows for greater versatility and stability combining 4 legs into one system A Quad Plate is required to ensure stability of the entire system The principles of stabilisation are the same as a Tripod with the addition of an extra leg This Quadpod application does not require any additional rigging because the resultant force and direction is within the triangular base The dotted lines on the ground surface represent the point where the resultant direction is focused Equipment bracket or winch used as an anchor Resultant 3 wT Tension rigging used to stabilise Independent object used as an anchor This Quadpod application requires additional rigging to counteract or balance the
41. whilst rf they are close together before splaying them out Va Once desired height is achieved fit leg pins through leg pin holes and secure with lynch pins maintained whilst the legs are being adjusted Leg pin with lynch Ensure that the stability of the Arachnipod is pin security Check that all leg locking pins are fully engaged and that each pin has been secured with a lynch pin Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 17 of 41 Copyright FERNO AUSTRALIA OFERNO Take care with sliding parts Do not place fingers into holes and WARNING watch for pinch points that may be created depending upon the application and the equipment used Step 5 Position the legs Check that the legs are positioned in a secure location and ensure that the most appropriate foot option is being used Step 6 Secure the legs Secure the legs to suit the application A length of rope and a rope grab can be used to stop the legs from splaying N Tethering Legs may also be lashed into position or some foot options may provide sufficient leg Stability without additional rigging Securing the legs 7 CAUTION Legs must be prevented from splaying apart when loaded Damage aes shat to the Arachnipod may result if the splaying of legs is not managed Step 7 Assess the resultant force and direction Tension and pre load lines may need to be rigged to ensure Arachnipod stability Please read the s
42. y used to balance compression forces 2 Additional rigging is used to balance tension forces and 3 Some rigging may be used to preload Enis oe the tension rigging to minimise SS movement created by rope stretch and cyclic loading Tug of war The game known as tug of war is a good example of balanced forces If two people applied exactly the same horizontal force then the rope would remain stationary The load forces are balanced and no movement would occur eo lt a ZL If a tripod is placed under the tug of war rope then the same rules would apply KA Because there is now a change of direction a resultant force now exists Resultant Force Tripod Assessing the stability of your Arachnipod rigging The following stabilisation examples will look at the resultant directions and suggest how the stability of the edge management scenario may be managed Arachnipod User Manual Date 19 March 2010 Version 4 0 Page 20 of 41 Copyright FERNO AUSTRALIA Remember an applied force has magnitude and direction This manual will refer to resultant forces and resultant directions Tripod Stabilisation Tripods make use of three legs all of which are in compression Some tripods applications may require additional rigging to provide sufficient stabilisation and security lf a tripod is rigged in such a way that the resultant force and direction are being applied downwards and if it remains within the tria
Download Pdf Manuals
Related Search