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youngmangroup.com 

 

USER GUIDE

Edition May 2010

BoSS 

Mobile Aluminium Tower  

1450/850 Ladderspan

3T

 

-

 

Through the Trapdoor Method 

Safety First

Mobile Towers - 3T Method 

Please read this guide carefully.

Please note that diagrams are for illustrative purposes only.

User guides are also available to download from our website

at youngmangroup.com

BoSS mobile aluminium towers are light-weight scaffold towers
used throughout the building and construction industry for both
indoor and outdoor access solutions where a stable and secure
platform is required. Ideal for maintenance and installation work or
short-term access, the highly versatile towers provide a strong
working platform for a variety of  heights.

This User Guide provides you with step by step instructions to
ensure your system is erected easily and safely, using the 3T
(Through The Trapdoor) method.

The law requires that personnel erecting, dismantling or altering
towers must be competent. Any person erecting a Youngman
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 code of  practice.

If  you need further information, design advice, additional guides 
or any other help with this product, please contact Youngman on
+44 (0)1621 745900 or email [email protected]

COMPLIANCES

The BoSS Ladderspan aluminium system has been tested and

certified to EN 1004: 2004 Class 3

Instruction Manual EN 1298-IM-EN

PREPARATION AND INSPECTION

Inspect the equipment before use to ensure that it is not
damaged and that it functions properly. Damaged or incorrect
components shall not be used.

INTRODUCTION 

1  

Check that all components are on site, undamaged and that
they are functioning correctly – (refer to Checklist and Quantity
Schedules). Damaged or incorrect components shall 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.

The safe working load is 275 kgs (606lbs), per platform level,
uniformly distributed up to a maximum of  950kgs (2100lbs),
per tower (including self  weight).

Towers 

must

 always be climbed from the inside using the built

in ladder during assembly and use.

It is recommended that towers should be tied to a solid
structure when left unattended.

Adjustable legs should only be used for levelling.

LIFTING OF EQUIPMENT

Tower components should be lifted using a reliable lifting
material (e.g. strong rope), employing a reliable knot (e.g.
clove hitch), to ensure safe fastening and always lift within the
footprint of  the tower.

Assembled mobile towers should not be lifted with a crane or
other lifting device.

Safety First 

SAFE USE 

2

BoSS Ladderspan 

User Guide 

Summary of Contents for BoSS

Page 1: ...t please contact Youngman on 44 0 1621 745900 or email sales youngmangroup com COMPLIANCES The BoSS Ladderspan aluminium system has been tested and certified to EN 1004 2004 Class 3 Instruction Manual...

Page 2: ...cult 8 39 46 17 21 Beware of open ended buildings which can cause funnelling effect Do not abuse equipment Damaged or incorrect components shall not be used Raising and lowering components tools and o...

Page 3: ...2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 1 8m and 2 5m Horizontal Brace red 6 6 6 6 10 10 10 10 14 14 14 14 18 18 18 18 22 22 22 22 26 26 26 2 1m and 2 7m Diagonal Brace blue 2 3 3 4 5 6 7 8 9 10 11 12 1...

Page 4: ...kg This must be evenly distributed over either one deck or two decks placed side by side The quantities on pages 7 and 8 will enable BoSS towers to be built safely and therefore comply with the requir...

Page 5: ...platform length of 2 5m has a self weight of 408kg 950kg 410kg 540kg maximum safe working load total weight self weight users tools and materials For greater heights and loads consult Youngman for gu...

Page 6: ...sure 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 Dia...

Page 7: ...e 3rd rungs Ensure the frames are vertical and level by checking with a spirit level and setting the adjustable legs as required Fit stabilisers see noteson page 30 IMPORTANT Only use the adjustable l...

Page 8: ...oor 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 Do not climb onto the platform until it is fully guardrai...

Page 9: ...ontal braces to the 850 end frames as shown in steps 2 and 3 for the 1450 tower procedure page 18 2 Fit a trapdoor deck on the 2nd rung Fix the horizontal braces red as guardrails on the 3rd and 4th r...

Page 10: ...wn Fit the toeboards see instruction on page 29 The tower is now complete Assembly Procedure 27 Assembly Procedure 28 7 To take down the tower reverse the building sequence When removing guardrail bra...

Page 11: ...oving the tower adjust the top clamps to lift the four stabiliser feet a maximum of 25mm off the ground and then unlock the castor brakes After moving ensure all four stabiliser feet are repositioned...

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