Boss Ladderspan 1450, Ladderspan 850 User Manual

BOSS MOBILE

ALUMINIUM TOWER

1450/850 LADDERSPAN

USER GUIDE

December 2005

3T - THROUGH THE TRAPDOOR

METHOD AND BOSS ADVANCED

GUARDRAIL SYSTEM

BOSS 1450/850 Ladderspan User Guide

Introduction

Please read this guide carefully.

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 or the BOSS Advanced
Guardrail System.

The law requires that personnel erecting towers must be
competent and qualified to do so. Any person erecting an
Youngman BOSS mobile tower should have a copy of this guide.
For full information on the use of mobile access and working
towers consult the PASMA guide or EN1298.

If you need further information, design advice, additional guides
or any other help with this product, please contact Youngman on
08700 130360 or email

[e-mail]

Compliances

The BOSS aluminium system has been tested and certified to BS
1139: Part 3: 1994 (HD1004) and DIN 4422 8/92, as well as
receiving national approvals in Switzerland, Sweden, Norway
and the Czech Republic. It also confirms to US standard ANSI

1988.

Preparation and Inspection

Inspect the equipment before use to ensure that it is not damaged
and that it functions properly.

Safety

Refer to Usage Advice.

1

BS1139:PART 3:1994

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DIN 4422 8/92:

HD 1004-3 8/12

Components - 3T Method

2

End Toeboards

4 Rung Ladder Frame

Toeboards

Platform

(Fixed and Trap

Door Decks)

Horizontal

Brace

Diagonal

Brace

2 Rung

Span

Frame

Stabiliser

Castor

Adjustable leg

2 Rung
Ladder
Frame

4 Rung

Span

Frame

3

BOSS 1450 Ladderspan to HD1004: Available in 2 lengths - 1.8m and 2.5m

Internal/External Use

Description Working Height 3.2m 3.7m 4.2m 4.7m 5.2m 5.7m 6.2m 6.7m 7.2m 7.7m 8.2m 8.7m 9.2m 9.7m 10.2m

Platform Height 1.2m 1.7m 2.2m 2.7m 3.2m 3.7m 4.2m 4.7m 5.2m 5.7m 6.2m 6.7m 7.2m 7.7m 8.2m

125/150/200mm Castor 4 4 4 4 4444444444 4

250mm Adjustable Leg 4 4 4 4 4444444444 4

1450 2 Rung Ladder Frame 1 1 1 1 1 1 1 1

1450 2 Rung Span Frame 1 1 1 1 1 1 1 1

1450 3 Rung Ladder Frame 1 1 11111

1450 3 Rung Span Frame 1 1 11111

1450 4 Rung Ladder Frame 1 1 1 2122323343 4

1450 4 Rung Span Frame 1 1 1 2122323343 4

1.8m and 2.5m Fixed Deck 1 1 1 2 1112111211 1

1.8m and 2.5m Trap Door Deck 1 1 1 1 2222333344 4

1.8m and 2.5m Horizontal Brace (red) 6 6 6 6 10 10 10 10 14 14 14 14 18 18 18

2.1m and 2.7m Diagonal Brace (blue) 2 3 3 4 56789101112131415

1.8m and 2.5m Side Toeboard 2 2 2 2 2222222222 2

1.2m End Toeboard 2 2 2 2 2222222222 2

Toeboard Holder 4 4 4 4 4444444444 4

SP7 Fixed stabiliser 4 4444444

SP10 Telescopic Stabiliser 444 4

Total Tower self-weight (kgs) 1.8m 91 99 103 146 161 169 175 195 210 217 224 257 272 279 286

Total Tower self-weight (kgs) 2.5m 108 116 120 169 185 194 201 226 243 251 258 296 313 321 328

Internal Use only

10.7m 11.2m 11.7m 12.2m 12.7m 13.2m 13.7m 14.2m

8.7m 9.2m 9.7m 10.2m 10.7m 11.2m 11.7m 12.2m

44444444

44444444

11 11

11 11

1111

1111

45455656

45455656

21112111

45555666

18 22 22 22 22 26 26 26

16 17 18 19 20 21 22 23

22222222

22222222

44444444

44444444

306 320 328 334 354 369 377 383

354 370 378 385 411 427 436 443

Quantity Schedule - 1450 3T Method

Quantity Schedule - 1450 3T Method

4

Number of working platforms allowed

The MAXIMUM SAFE WORKING LOAD (the combined weight of the users, tools
and materials) that may be placed on the tower is the total weight less the self
weight of the tower. The total weight for the towers shown in the schedule is 950kg.

Example 1:

A 1450 tower built using the 3T method with a 4.2m platform height and a
platform length of 1.8m has a self weight of 175kg.

950kg — 175kg = 775kg maximum safe working load

total weight self weight (users, tools and materials)

Example 2:

A 1450 tower built using the 3T method with a 11.7m platform height and a
platform length of 2.5m has a self weight of 436kg.

950kg — 436kg = 514kg maximum safe working load

total weight self weight (users, tools and materials)

For greater heights and loads, consult Youngman for guidance.

Platform Loading

On a 1450 tower a platform may comprise of a single deck or two decks placed
side by side. The maximimum safe working load (the combined weight of the
users, tools and materials) that may be placed on a platform is 275kg. This must
be evenly distributed over either one deck, or two decks placed side by side.

The quantities on page 3 will enable BOSS towers to be built safely and therefore
comply with the requirements of the Work at Height Regulations 2005. They include
double guardrails to all platforms, and toeboards will need to be added if any levels
are used as working platforms and for storage of materials. BS1139 requires
platforms at least every 4m, and these measures will exceed that requirement.

Ballast: Internal/External use

There is no requirement for ballast on 1450 towers if using stabilisers as
detailed in the table on page 3.

Mobile Outriggers

MP7 mobile outriggers can be used instead of SP7 and SP10 stabilisers,
as detailed below. MP7 mobile outrigger kits comprise:

MP7 MOBILE OUTRIGGER 4
125/150/200mm CASTOR 4

(Use same diameter castors as on tower)
250mm ADJUSTABLE LEG 4
PLAN BRACES 4

The above components replace:

SP7/SP10 STABILISER 4

Stabilisers

To improve rigidity, larger stabilisers can be used at a lower level than
shown in the table.

5

BOSS 850 Ladderspan to HD1004: Available in 2 lengths - 1.8m and 2.5m

Internal/External Use

Description Working Height 3.2m 3.7m 4.2m 4.7m 5.2m 5.7m 6.2m 6.7m 7.2m 7.7m 8.2m 8.7m 9.2m 9.7m 10.2m

Platform Height 1.2m 1.7m 2.2m 2.7m 3.2m 3.7m 4.2m 4.7m 5.2m 5.7m 6.2m 6.7m 7.2m 7.7m 8.2m

125/150/200mm Castor 4 4 4 4 4444444444 4

250mm Adjustable Leg 4 4 4 4 4444444444 4

850 2 Rung Ladder Frame 1 1 1 1 1 1 1 1

850 2 Rung Span Frame 1 1 1 1 1 1 1 1

850 3 Rung Ladder Frame 1 1 11111

850 3 Rung Span Frame 1 1 11111

850 4 Rung Ladder Frame 1 1 1 2122323343 4

850 4 Rung Span Frame 1 1 1 2122323343 4

1.8m and 2.5m Trap Door Deck 1 1 1 2 2223333444 4

1.8m and 2.5m Horizontal Brace (red) 6 6 6 6 10 10 10 10 14 14 14 14 18 18 18

2.1m and 2.7m Diagonal Brace (blue) 2 3 3 4 56789101112131415

1.8m and 2.5m Side Toeboard 2 2 2 2 2222222222 2

0.6m End Toeboard 2 2 2 2 2222222222 2

Toeboard Holder 4 4 4 4 4444444444 4

SP7 Fixed stabiliser 4 4 4 4 4

SP10 Telescopic Stabiliser 4444

SP15 Telescopic Stabiliser 444 4

Ballast required (kgs) 2.5m 25 50 75

Total Tower self-weight (kgs) 1.8m 72 79 106 126 139 146 151 185 198 204 210 245 258 265 270

Total Tower self-weight (kgs) 2.5m 84 90 117 143 158 165 172 210 251 283 314 279 294 301 307

Internal Use only

10.7m 11.2m 11.7m 12.2m 12.7m 13.2m 13.7m 14.2m

8.7m 9.2m 9.7m 10.2m 10.7m 11.2m 11.7m 12.2m

44444444

44444444

11 11

11 11

1111

1111

45455656

45455656

55556666

18 22 22 22 22 26 26 26

16 17 18 19 20 21 22 23

22222222

22222222

44444444

444

44444

276 289 296 316 336 349 356 362

318 334 341 362 387 403 410 416

Quantity Schedule - 850 3T Method

Quantity Schedule - 850 3T Method

6

Number of working platforms allowed

The MAXIMUM SAFE WORKING LOAD (the combined weight of the users, tools
and materials) that may be placed on the tower is the total weight less the self
weight of the tower. The total weight for the towers shown in the schedule is 950kg

.

Example 1:

An 850 tower built using the 3T method with a 4.2m platform height and a
platform length of 1.8m has a self weight of 151kg.

950kg — 151kg = 799kg maximum safe working load

total weight self weight (users, tools and materials)

Example 2:

An 850 tower built using the 3T method with a 11.7m platform height and a
platform length of 2.5m has a self weight of 410kg.

950kg — 410kg = 540kg maximum safe working load

total weight self weight (users, tools and materials)

For greater heights and loads, consult Youngman for guidance.

Platform Loading

On an 850 tower a platform comprises a single deck. The maximimum 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.

The quantities on page 5 will enable BOSS towers to be built safely and therefore
comply with the requirements of the Work at Height Regulations 2005. They include
double guardrails to all platforms, and toeboards will need to be added if any levels
are used as working platforms and for storage of materials. BS1139 requires
platforms at least every 4m, and these measures will exceed that requirement.

Ballast: Internal/External use

Stabiliser requirements are based on calculations from BS1139:

1. Up to 8.2m (platform height) the stabilisers and ballast are shown for
external use. 2. Above 8.2m the shedule is for internal use only.
For internal use only towers may be erected up to 12.2m without ballast.
SP10 stabilisers may be fitted up to 9.7m platform height. For greater
rigidity, fit SP15 stabilisers at lower height.

Mobile Outriggers

MP7 and MP16 mobile outriggers can be used instead of SP10 and SP15 telescopic
stabilisers respectively, as detailed below. MP7 mobile outrigger kits comprise:

MP7 MOBILE OUTRIGGER 4
125/150/200mm CASTOR 4

(Use same diameter castors as on tower)
250mm ADJUSTABLE LEG 4
PLAN BRACES 4

The above components replace:

SP10/SP15 STABILISER 4

7

Internal/External Use

Description Working Height 3.2m 3.7m 4.2m 4.7m 5.2m 5.7m 6.2m 6.7m 7.2m 7.7m 8.2m 8.7m 9.2m 9.7m 10.2m

Platform Height 1.2m 1.7m 2.2m 2.7m 3.2m 3.7m 4.2m 4.7m 5.2m 5.7m 6.2m 6.7m 7.2m 7.7m 8.2m

125/150/200mm Castor 4 4 4 4 4444444444 4

250mm Adjustable Leg 4 4 4 4 4444444444 4

1450 2 Rung Ladder Frame 1 1 1 1 1 1 1 1

1450 2 Rung Span Frame 1 1 1 1 1 1 1 1

1450 3 Rung Ladder Frame 1 1 11111

1450 3 Rung Span Frame 1 1 11111

1450 4 Rung Ladder Frame 1 1 1 2122323343 4

1450 4 Rung Span Frame 1 1 1 2122323343 4

1.8m and 2.5m Advanced Guardrail 2 2 2 2 2222222222 2

1.8m and 2.5m Fixed Deck 1 1 2 2 2222223333 4

1.8m and 2.5m Trap Door Deck 1 1 1 1 2222223333 4

1.8m and 2.5m Horizontal Brace (red) 2 2 2 2 6 6 6 10 10 10 10 10 14 14 14

2.1m and 2.7m Diagonal Brace (blue) 2 3 3 4 56789101112131415

1.8m and 2.5m Side Toeboard 2 2 2 2 2222222222 2

1.2m End Toeboard 2 2 2 2 2222222222 2

Toeboard Holder 4 4 4 4 4444444444 4

SP7 Fixed stabiliser 4 4444444

SP10 Telescopic Stabiliser 444 4

Total Tower self-weight (kgs) 1.8m 107 114 132 162 190 198 204 218 224 232 266 286 300 307 342

Total Tower self-weight (kgs) 2.5m 125 133 156 186 221 229 236 252 259 267 312 332 348 357 402

Internal Use only

10.7m 11.2m 11.7m 12.2m 12.7m 13.2m 13.7m 14.2m

8.7m 9.2m 9.7m 10.2m 10.7m 11.2m 11.7m 12.2m

44444444

44444444

11 11

11 11

1111

1111

45455656

45455656

22222222

45555666

45555666

14 18 18 18 18 22 22 22

16 17 18 19 20 21 22 23

22222222

22222222

44444444

44444444

348 390 398 404 410 452 460 467

408 463 471 478 484 539 547 554

BOSS 1450 Ladderspan to HD1004: Advanced Guardrail System - Available in 2 lengths, 1.8m and 2.5m

IMPORTANT! For other Quantity Schedule information refer to Page 4 -1450 3T Method

Quantity Schedule - 1450 Advanced
Guardrail System

8

Quantity Schedule - 850 Advanced
Guardrail System

Internal/External Use

Description Working Height 3.2m 3.7m 4.2m 4.7m 5.2m 5.7m 6.2m 6.7m 7.2m 7.7m 8.2m 8.7m 9.2m 9.7m 10.2m

Platform Height 1.2m 1.7m 2.2m 2.7m 3.2m 3.7m 4.2m 4.7m 5.2m 5.7m 6.2m 6.7m 7.2m 7.7m 8.2m

125/150/200mm Castor 4 4 4 4 4444444444 4

250mm Adjustable Leg 4 4 4 4 4444444444 4

850 2 Rung Ladder Frame 1 1 1 1 1 1 1 1

850 2 Rung Span Frame 1 1 1 1 1 1 1 1

850 3 Rung Ladder Frame 1 1 11111

850 3 Rung Span Frame 1 1 11111

850 4 Rung Ladder Frame 1 1 1 2122323343 4

850 4 Rung Span Frame 1 1 1 2122323343 4

1.8m and 2.5m Advanced Guardrail 2 2 2 2 2222222222 2

1.8m and 2.5m Trap Door Deck 1 1 1 1 2222223444 4

1.8m and 2.5m Horizontal Brace (red) 2 2 2 2 666610101010141414

2.1m and 2.7m Diagonal Brace (blue) 2 3 3 4 56789101112131415

1.8m and 2.5m Side Toeboard 2 2 2 2 2222222222 2

0.6m Toeboard 2 2 2 2 2222222222 2

Toeboard Holder 4 4 4 4 4444444444 4

SP7 Fixed stabiliser 4 4 4 4 4

SP10 Telescopic Stabiliser 4444

SP15 Telescopic Stabiliser 444 4

Ballast required (kgs) 2.5m 25 50 75

Total Tower self-weight (kgs) 1.8m 88 94 121 127 154 161 167 186 199 205 226 260 273 280 286

Total Tower self-weight (kgs) 2.5m 100 107 134 140 175 182 189 208 248 280 331 296 311 318 324

Internal Use only

10.7m 11.2m 11.7m 12.2m 12.7m 13.2m 13.7m 14.2m

8.7m 9.2m 9.7m 10.2m 10.7m 11.2m 11.7m 12.2m

44444444

44444444

11 11

11 11

1111

1111

45455656

45455656

22222222

55556666

14 18 18 18 18 22 22 22

16 17 18 19 20 21 22 23

22222222

22222222

44444444

444

44444

291 305 311 331 351 365 371 377

335 351 358 379 404 420 427 433

BOSS 850 Ladderspan to HD1004: Advanced Guardrail System - Available in 2 lengths, 1.8m and 2.5m

IMPORTANT! For other Quantity Schedule information refer to page 6 - 850 3T method

Erection

● Check that all components are on site and that they are

functioning correctly – See Quantity Schedule.

● 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 275kgs (606Ibs), per platform unit,

uniformly distributed up to a maximum of 950kgs (2100Ibs)
per tower (including self weight).

● Towers must always be climbed from the inside during

assembly using the built-in ladder provided.

● Adjustable legs should only be used for levelling.

Lifting of equipment

● Tower components should be firmly

secured by a reliable lifting material
(e.g. rope), employing a reliable knot
(e.g. clove hitch), to ensure safe
fastening.

Stabilisers/Ballast

● Stabilisers or outriggers and ballast weights should always be

fitted when specified.

● Ballast is used at the base to stabilise towers against

overturning. The Quantity Schedule shows the recommended
stabilisation. In circumstances where there is restricted ground
clearance for stabilisers/outriggers, contact your supplier for
advice. It must be of solid materials (i.e. not water or loose
sand) and should not be positioned to overload individual
legs. Ballast should be secured against accidental removal
where practicable, and be supported on the lowest rung of the
bottom frame.

Movement

● The tower should only be moved by manual effort, and only

from the base.

● When moving the tower, beware of live electrical apparatus,

particularly overhead, plus wires or moving parts of machinery.

● No personnel or materials should be on the tower during movement.

● Caution should be exercised when wheeling a tower over

rough, uneven or sloping ground, taking care to unlock and
lock castors. If stabilisers are fitted, they should only be lifted
sufficiently above the ground to clear ground obstructions.

● The height of the tower, when being moved, should not

exceed 2.5 times the minimum base dimensions, or 6 metres
overall height.

Usage Advice

9

Attachment

via location

hole on

platform.