Boss LADDERSPAN 3T User Manual
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Boss LADDERSPAN 3T User Manual

Mobile aluminium tower
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LADDERSPAN
3T
Mobile Aluminium Tower
1450/850 Ladderspan
3T - Through the Trapdoor Method
USER GUIDE

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Summary of Contents for Boss LADDERSPAN 3T

  • Page 1 LADDERSPAN Mobile Aluminium Tower 1450/850 Ladderspan 3T - Through the Trapdoor Method USER GUIDE...

  • Page 2: Safety First

    Trapdoor) method. The law requires that personnel erecting, dismantling or altering towers must be competent. Any person erecting a BoSS mobile tower must have a copy of this guide. For further information on the use of mobile access and working towers consult the PASMA operators‘...
  • Page 3 Safety First SAFE USE ● Check that all components are on site, undamaged and that they are functioning correctly - (refer to Checklist and Quantity Schedules). Damaged or incorrect components should not be used. ● Check if the ground on which the mobile access tower is to be erected and moved is capable of supporting the tower.
  • Page 4 After every movement of the tower, use a spirit level to check that it is vertical and level and set the adjustable legs as required. ● Do not move the tower in wind speeds over 7.7 metres per second (17mph). BoSS Ladderspan User Guide...

  • Page 5: During Use

    Safety First DURING USE ● Beware of high winds in exposed, gusty or medium breeze conditions. We recommend that in wind speeds over 7.7 metres per second (17 mph), cease working on the tower and do not attempt to move it. If the wind becomes a strong breeze, (expected to reach 11.3 metres per second - 25 mph) tie the tower to a rigid structure.

  • Page 6: Maintenance - Storage - Transport

    Brace claws, frame interlock clips, trapdoor latches and ● platform windlocks should be regularly checked to ensure that they lock correctly. Refer to the BoSS user guide for detailed inspection and ● maintenance advice. Components should be stored with due care to prevent ●...
  • Page 7 Safety First End Toeboard 4 Rung Ladder Frame Horizontal Brace 4 Rung Frame Side Toeboard Platform (Fixed and Trapdoor Decks) Diagonal Brace Stabiliser 2 Rung Frame Castor 2 Rung Ladder Frame Adjustable Leg bossaccesstowers.com...
  • Page 8 Quantity Schedule 1450 Width Towers BoSS Ladderspan User Guide...
  • Page 9 Quantity Schedule 1450 Width Towers bossaccesstowers.com...

  • Page 10: Platform Loading

    Total Weight Self-weight (users, tools and materials) For greater heights and loads, consult BoSS for guidance. PLATFORM LOADING On a 1450 tower a platform may comprise of a single deck or two decks placed side by side. The maximum safe working load (the combined weight of the users, tools and materials) that may be placed on a platform is 275kg.
  • Page 11 Quantity Schedule 1450 Width Towers BALLAST: Internal/External Use There is no requirement for ballast on 1450 towers if using stabilisers as detailed in the table on page 8. MOBILE OUTRIGGERS MP16 outriggers can be used instead of SP15 stabilisers, as detailed below.
  • Page 12 Quantity Schedule 850 Width Towers BoSS Ladderspan User Guide...
  • Page 13 Quantity Schedule 850 Width Towers bossaccesstowers.com...
  • Page 14 Total Weight Self-weight (users, tools and materials) For greater heights and loads, consult BoSS for guidance. PLATFORM LOADING On an 850 tower a platform comprises of a single deck only. The maximum safe working load (the combined weight of the users, tools and materials) that may be placed on a platform is 275kg, evenly distributed over the deck.
  • Page 15 Quantity Schedule 850 Width Towers BALLAST: Internal/External Use There is no requirement for ballast on 850 towers if using stabilisers page 12. as detailed in the table on MOBILE OUTRIGGERS MP16 outriggers can be used instead of SP15 stabilisers, as detailed below.

  • Page 16: Assembly Procedure

    3 rung frames next and the 4 rung frames on the top. Refer to the quantity schedules for detail. TO DISMANTLE A BoSS LADDERSPAN TOWER Remove toeboards, and pass down the tower. Unclip farthest end of braces and immediately go to protected trapdoor position on ladder to complete removal.

  • Page 17: Safety Checklist

    Safety Checklist Mobile Towers - 3T Method CHECKLIST Ensure all brace claws operate and lock correctly prior to erection Inspect components prior to erection Inspect tower prior to use Tower upright and level Castors locked and legs correctly adjusted Diagonal braces fitted Stabilisers/outriggers fitted as specified Platforms located and windlocks on Toeboards located...
  • Page 18 The procedure illustrated shows 4.2m platform height tower starting with a 2 rung frame. BoSS recommend two persons are used to build BoSS Towers. Above 4m height, it is essential that at least two persons are used. Only climb the tower from the inside.
  • Page 19 Assembly Procedure Fit one horizontal brace (red) onto the vertical of a span frame, just above the bottom rung, with the claw facing outwards. The frame will now be self supporting. Note: All locking claws must be opening before fitting. Locked Position the ladder frame as shown and fit the other end of the horizontal brace on to the vertical (just above the bottom...
  • Page 20 1st and the 3rd rungs. Ensure the frames are vertical and level by checking with a spirit level and setting the adjustable legs as required. IMPORTANT - Only use the adjustable legs to level the tower and not to gain extra height. BoSS Ladderspan User Guide...
  • Page 21 Assembly Procedure Fit a temporary deck on the lowest rungs. Fit a trapdoor deck on the 4th rung (2.0m) with the trapdoor next to the ladder. Ensure the trapdoor is positioned with the hinges towards the outside of the tower as shown. Climb the ladder and, from the protected trapdoor position, fit guardrails on the 5th and 6th rungs (in that order) on both sides of the platform.
  • Page 22 Add a single diagonal between the 7th and 9th rungs as shown. Climb up the ladder, and from the protected trapdoor position, fit the guardrails on the 9th and 10th rungs, in that order, on both sides of the tower. BoSS Ladderspan User Guide...
  • Page 23 Assembly Procedure When building beyond a 4.2m platform height. Continue to add pairs of end frames, diagonal braces and fit trapdoor decks as shown in the previous steps. Add guardrails at 0.5m and 1.0m, (in that order), above the platform from the protected trapdoor position.

  • Page 24: Dismantling Procedure

    4 claws furthest from the trapdoor and then return immediately to the protected position within the trapdoor. You may then unlock the claws at the other ends of the guardrails to remove them from the tower. BoSS Ladderspan User Guide...
  • Page 25 Assembly Procedure Mobile Towers - 850 3T Method ASSEMBLY FOR 850 TOWERS Always start building with the smallest height frames at the base of the tower: PLATFORM HEIGHT IN METRES FRAME AT BASE 1.7, 2.2, 3.7, 4.2, 5.7, 6.2, 7.7, 8.2, 9.7, 2 rung 10.2, 11.7, 12.2 2.7, 4.7, 6.7, 8.7, 10.7...
  • Page 26 30). Fit the next pair of necessary. Fit stabilisers (see notes on end frames and check the frame interlock clips are engaged. IMPORTANT. Only use the adjustment on the legs to level the tower and not to gain extra height. BoSS Ladderspan User Guide...
  • Page 27 Assembly Procedure Fit 2 pairs of diagonal braces in opposing directions between the 3rd and 5th rungs and the 5th and 7th rungs. Locate a trapdoor deck on the 6th rung, with the trapdoor next to the ladder. bossaccesstowers.com...
  • Page 28 Assembly Procedure Climb up the inside of the tower and from the protected position of the trapdoor, fit guardrails to the 7th and 8th rungs (in that order) on both sides of the tower. BoSS Ladderspan User Guide...
  • Page 29 Assembly Procedure Continue the procedure until the required working height is reached, adding additional pairs of end frames, diagonal braces and fitting trapdoor platforms, as shown on previous steps. At every platform level, add horizontal braces as guardrails from the protected Step position within the trapdoor (as shown in Fit a single diagonal at the top of the tower as shown.
  • Page 30 On other side of the working platform, position the clip as (B). Place 25mm thick toeboards into slots in toeboard clips as shown. Side Toeboard End Toeboard Toeboard Clip Claw Deck Rung BoSS Ladderspan User Guide...
  • Page 31 Stabilisers and Outriggers Mobile Towers - 3T Method STABILISERS Attach one stabiliser to each corner of the tower as shown. Ensure that stabiliser feet are equally spaced to form a square. SP10 and SP15 telescopic stabilisers must always be fully extended. Position the lower clamp so that the lower arm is as close to the horizontal as possible.
  • Page 32 For further information about this product or any other products and services, please contact: The Causeway, Maldon, Essex, CM9 4LJ, United Kingdom +44 (0)1621 745900 +44 (0)1621 859845 uk.customercare@wernerco.com bossaccesstowers.com Members of: P/N03299400 @WernerCo Rev 2 09/16...

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