HSS Hire BOSS 1450 Guide de dépannage

Boss Alloy Access

Towers

Tower Components

This BOSS User Guide is designed to provide you with step by

step instructions to ensure your system is erected easily and safely

using the 3T (Through the Trapdoor) method. Before assembly,

please read the Safety Notes carefully.

The law requires that operatives must be competent and qualified

to erect the tower. If another person is involved, please pass on

these instructions.

For further information on the safe use of Mobile Access Towers

consult the PASMA Guide or EN 1298.

4 RUNG SPAN

FRAME

END

TOEBOARDS

SIDE

TOEBOARDS

HORIZONTAL

BRACE

DIAGONAL

BRACE

2 RUNG LADDER

FRAME

ADJUSTABLE LEG

STABILISER

CASTOR

PLATFORM

(FIXED AND

TRAP DOOR

DECKS)

INTRODUCTION

BALLAST: 1450 LADDERSPAN

Internal/External use - There is no requirement for ballast

on 1450 towers if using stabilisers as detailed in the

QUANTITY SCHEDULE and the stabilisers have been fully

deployed in accordance with the user guide.

STABILISERS

For Internal use only, SP10 stabilisers may be fitted on

1.45 m x 1.8 m towers up to 10.2 m platform height or

12.2 m platform height for 1.45 m x 2.5 m towers.

To improve rigidity, larger stabilisers can be used at a

lower level than shown in the table.

NUMBER OF WORKING PLATFORMS ALLOWED

The number of working levels is based on fully loading

each single deck to the maximum of 275 kg. A deck is

defined as a single unit, but a working platform can be

either one or two decks. The 275 kg limit applies to each

such working level, regardless of the number of decks.

Under normal circumstances only two such working

levels are permissable, as with the taller

structures/lengths self-weight will be a limiting factor.

Maximum Safe Working Load for the tower structure is

950 kg.

Should heavier loads than these be required for

particular applications, your local Branch will be able to

provide guidance.

The quantities in the schedule will enable 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 / or for storage of materials.

BS1139 requires platforms at least every 4m, and these

measures will exceed that requirement.

NUMBER OF WORKING PLATFORMS ALLOWED

The number of working levels is based on fully loading

each single deck to the maximum of 275 kg.

The number of working levels will be limited by the total

Safe Working Load of the tower.

The Maximum Safe Working Load for the tower structures

shown is 950 kg. For heights in excess of these, and for

heavier loads, consult your local HSS Hire for guidance.

The quantities in the schedule will enable 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 / or for storage of materials.

BS1139 requires platforms at least every 4m, and these

measures will exceed that requirement.

BALLAST 850 LADDERSPAN: - Internal/External use.

Stabiliser requirements are based on calculations from

BS1139:

Above 8.2 m, the schedule is for internal use only.

For Internal use only, towers may be erected up to

12.2 m platform height without ballast.

For External use, towers fitted with a 2.5 m length

platform must have ballast fitted as follows:

7.2 m platform height = 25 kg ballast

8.2 m platform height = 75 kg ballast

Ballast is used at the base to stabilise towers against

overturning. 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, and be supported on the

lowest rung of the bottom frame.

STABILISERS

The QUANTITY SCHEDULE shows the recommended

stabilisation. In circumstances where there is

restricted ground clearance for stabilisers / outriggers,

contact your local HSS Hire for advice.

SP10 stabilisers

may be fitted up to 6.2 m platform height

Externally and 9.2 m Internally.

Fitting SP15 stabilisers at heights lower than these will

increase rigidity and provide additional stability.

1.45 m X 1.8 m INTERNAL/EXTERNAL USE INTERNAL USE ONLY

BOSS 1450 WIDE

WORKING HEIGHT 4.2 m 5.2 m 6.2 m 7.2 m 8.2 m 9.2 m 10.2 m 11.2 m 12.2 m

Additional

LADDERSPANPLATFORM HEIGHT2.2m3.2m4.2m5.2m6.2m7.2m8.2m9.2m10.2m Lift 1.0 m

1.8mSIDETOEBOARD 222222222

1.2mENDTOEBOARD 222222222

TOEBOARDHOLDER 444444444

1.8mFIXEDDECK 111111111

1.8mTRAPDOORDECK 1223344551

1.8 m HORIZONTAL BRACE (RED) 6 10 10 14 14 18 18 22 22 4

2.1mDIAGONALBRACE(BLUE) 357911131517192

1.45 m 2-RUNG LADDER FRAME 1 1 1 1 1 1

1.45 m 2-RUNG SPAN FRAME 1 1 1 1 1 1

1.45m4-RUNGLADDERFRAME 122334455

1.45m4-RUNGSPANFRAME 122334455

150 mm CASTOR WHEEL 444444444

ADJUSTABLELEG 444444444

SP10TELESCOPICSTABILISER 44444444

TOWER (SELF-WEIGHT) kg 103 161 175 210 224 272 286 320 334 34

QUANTITY SCHEDULE BOSS 1450 LADDERSPAN TO HD1004

CHECKLIST

INSPECT COMPONENTS PRIOR TO ERECTION 

INSPECT TOWER PRIOR TO USE 

TOWER UPRIGHT AND LEVEL 

CASTORS LOCKED/LEGS CORRECTLY ADJUSTED 

GUARDRAILS FITTED 

DIAGONAL BRACES FITTED 

STABILISERS/OUTRIGGERS FITTED AS SPECIFIED 

PLATFORMS LOCATED & WINDLOCKS ON 

TOEBOARDS LOCATED 

REFER TO THIS CHECKLIST BEFORE USING EACH TIME

FITTING TOEBOARDS

Lock yellow plastic toeboard clips over rung and deck

claw as shown. Position as (A) on right hand deck claw.

On other side of the working platform, position the clip as

(B). Place 25mm thick toeboards into slots in toeboard clips

as shown.

TOEBOARD CLIP

TOEBOARD

CLAW

RUNG

DECK

©HSS Hire Service Group Ltd 2006 No. 508/06

Group Office: 25 Willow Lane, Mitcham, Surrey CR4 4TS

Web Site: www.hss.com

…any comments?

If you have any suggestions to

enable us to improve the

information within this guide

please e-mail your comments or

write to the Safety Guide Manager

at the address below

e-mail: [email protected]

Designed to the European Standard

HD1004, the BOSS Alloy Tower provides

the ideal platform for light work.

Two versions are available: 1450 mm &

850 mm wide, each with either 1.8 m or

2.5 m deck lengths.

Operating & Safety Guide 508

508/06

1.45 m X 2.5 m INTERNAL/EXTERNAL USE INTERNAL USE ONLY

BOSS 850 WIDE

WORKING HEIGHT 4.2 m 5.2 m 6.2 m 7.2 m 8.2 m 9.2 m 10.2 m 11.2 m 12.2 m

Additional

LADDERSPANPLATFORM HEIGHT2.2m3.2m4.2m5.2m6.2m7.2m8.2m9.2m10.2m Lift 1.0 m

2.5mSIDETOEBOARD 222222222

1.2mENDTOEBOARD 222222222

TOEBOARDHOLDER 444444444

2.5mFIXEDDECK 111111111

2.5mTRAPDOORDECK 1223344551

2.5 m HORIZONTAL BRACE (RED) 6 10 10 14 14 18 18 22 22 4

2.7mDIAGONALBRACE(BLUE) 357911131517192

1.45 m 2-RUNG LADDER FRAME 1 1 1 1 1 1

1.45 m 2-RUNG SPAN FRAME 1 1 1 1 1 1

1.45m4-RUNGLADDERFRAME 122334455

1.45m4-RUNGSPANFRAME 122334455

150 mm CASTOR WHEEL 444444444

ADJUSTABLELEG 444444444

SP10TELESCOPICSTABILISER 44444444

TOWER (SELF-WEIGHT) kg 120 185 201 243 258 313 328 370 385 42

0.85 m X 1.8 m INTERNAL/EXTERNAL USE INTERNAL USE ONLY

BOSS 850 WIDE

WORKING HEIGHT 4.2 m 5.2 m 6.2 m 7.2 m 8.2 m 9.2 m 10.2 m 11.2 m 12.2 m

Additional

LADDERSPANPLATFORM HEIGHT2.2m3.2m4.2m5.2m6.2m7.2m8.2m9.2m10.2m Lift 1.0 m

1.8mSIDETOEBOARD 222222222

0.6mENDTOEBOARD 222222222

TOEBOARDHOLDER 444444444

1.8mTRAPDOORDECK 1223344551

1.8 m HORIZONTAL BRACE (RED) 6 10 10 14 14 18 18 22 22 4

2.1 m DIAGONAL BRACE (BLUE) 3 5 7 9 11 13 15 17 19 2

1.45m2-RUNGLADDERFRAME 111111

1.45m2-RUNGSPANFRAME 111111

1.45m4-RUNGLADDERFRAME 122334455

1.45m4-RUNGSPANFRAME 122334455

150 mm CASTOR WHEEL 4 4 4 444444

ADJUSTABLE LEG 4 4 4 4 4 4 4 4 4

SP10 TELESCOPIC STABILISER 4 4 4 4 4

SP15 STABILISER 4444

TOWER (SELF-WEIGHT) kg 106 139 151 198 210 258 270 289 316 19

QUANTITY SCHEDULE BOSS 850 LADDERSPAN TO HD1004

0.85 m X 2.5 m INTERNAL/EXTERNAL USE INTERNAL USE ONLY

BOSS 850 WIDE

WORKING HEIGHT 4.2 m 5.2 m 6.2 m 7.2 m 8.2 m 9.2 m 10.2 m 11.2 m 12.2 m

Additional

LADDERSPANPLATFORM HEIGHT2.2m3.2m4.2m5.2m6.2m7.2m8.2m9.2m10.2m Lift 1.0 m

2.5mSIDETOEBOARD 222222222

0.6mENDTOEBOARD 222222222

TOEBOARDHOLDER 444444444

2.5mTRAPDOORDECK 1223344551

2.5 m HORIZONTAL BRACE (RED) 6 10 10 14 14 18 18 22 22 4

2.7mDIAGONALBRACE(BLUE) 357911131517192

1.45 m 2-RUNG LADDER FRAME 1 1 1 1 1 1

1.45 m 2-RUNG SPAN FRAME 1 1 1 1 1 1

1.45m4-RUNGLADDERFRAME 122334455

1.45m4-RUNGSPANFRAME 122334455

150 mm CASTOR WHEEL 444444444

ADJUSTABLELEG 444444444

SP10 TELESCOPIC STABILISER 4 4 4 4 4

SP15 STABILISER 4444

TOWER (SELF-WEIGHT) kg 117 158 172 226 239 294 307 334 362 27

SP10

SP15

250

2500

850

4914

1450

5688

250

1900

850

3939

1450

4671

STABILITY: STABILISERS & OUTRIGGERS

Stabilisers are used when the tower is to be used

occasionally, frequent movement will require Outriggers.

Attach one stabiliser to each corner of the tower at approx.

45 degrees. Secure top clamp below castings, bottom

clamp as low as possible. If Clamp is obstructed, release

and move. Ensure clamps are rigidly fixed to limit

movement.

With SP10 and SP15 Stabilisers, extend telescopic leg until in

contact with ground.

When moving, check for obstructions and lock feet about

25mm off the ground, unlock castors, and move. After

moving, check all castors are in ground contact and lock

Stabiliser feet.

…have you been trained?

The law requires that personnel erecting towers must be competent

and qualified to do so. PASMA accredited Mobile Access Tower

training available at HSS Training Solutions 0845 766 7799

TOWER COMPONENTS

4 RUNG LADDER

FRAME

2 RUNG SPAN

FRAME

508_06.qxp:508_06.qxd 27/3/07 15:11 Page 1

ASSEMBLY PRINCIPLES

WHEN BUILDING A BOSS TOWER:

To comply with the Work at Height

Regulations, we show procedures with

additional platforms and the locating of

Guardrails when building in advance of

climbing onto a platform to reduce the risk of

a fall. This involves moving components, but

is an important procedure for your safety.

Always stand on a Boss Platform, never on the

rungs of a Frame.

All platforms feature double Guardrails on

both faces of either individual platforms or

fully decked levels.

Install Guardrails prior to climbing onto the

platform, from the protected position within

the trapdoor. Working platforms and rest

platforms (every 4 metres) must have

Guardrails installed 0.5 m and 1.0 m (1 and 2

rungs above the platform in ALL cases. All

working levels require toeboards.

DISMANTLING PRINCIPLES

TO DISMANTLE A BOSS TOWER:

Remove toeboards, and pass down the tower.

1450 TOWER

Unclip farthest end of braces and immediately

go to protected Trapdoor position on ladder

to complete removal.

Platforms used whilst dismantling should be

Double-Guardrailed on both faces.

Remove upper platforms from protected platform

levels below.

Pass removed components out of the Tower to a

colleague.

850 TOWER

Follow same procedure.

GENERAL NOTE

The assembly procedure should be

based on:

Always stand on a BOSS

platform, never on the rungs of

a frame.

Install platforms at 2 metre

vertical intervals, to give a

manageable reach height.

Locate double Guardrails

(Horizontal Braces) in advance of

climbing onto any platform.

Working Platforms require

Toeboards.

Always position Trapdoors over

Ladder side, and Fixed Platforms

on opposite side.

Unlocked

Locked

= Fixed Deck

= Trapdoor Deck

2Clip Horizontal Brace (Red) onto

the vertical of the Span Frame,

facing claws outwards.

Frame will now be self-supporting.

Locking claws should be primed

before use, and released for

dismantling or relocation.

3Position the Ladder Frame as

shown.

Clip the other end of the Horizontal

Brace onto the Ladder Frame. Fit

another Horizontal Brace (Red) onto the

lowest horizontal rung of the Frames to

square the tower.

5Add Stabilisers.

See note on Stabilisers. 6Fit a Fixed Deck on the lowest rung.

Fit a Trapdoor Deck on the 4th Rung

(2.0 m) with the Trapdoor next to

the Ladder.

Climb Ladder, and from a protected

Trapdoor position, fit the Guardrails on 5th

and 6th Rungs, in that order, on both

sides of the Platform.

7Fit the next pair of Diagonal

Braces in opposing directions

between the 3rd and 5th Rungs.

Fit an additional Span Frame and

Ladder Frame. Ensure the Interlock

Clips are engaged.

8Fit the next pair of Diagonal

Braces between the 5th and 7th

Rungs.

9If finishing at this height (4.2 m

Platform), the Fixed Deck should

first be repositioned to the 8th

Rung of the Tower. Fit a

Trapdoor alongside it, with the

Trapdoor next to the Ladder.

10 Climb the Ladder and, from a

protected Trapdoor position,

fix Guardrails on the 9th and

10th Rungs, in that order, on

both sides of the Tower. Add

a Diagonal Brace between the

7th and 9th Rung.

11 When building beyond a 4.2 m

platform height Tower -

Continue to add Span and

Ladder Frames, Diagonal

Braces and Trapdoor Platforms

as shown in the previous steps.

Locked

1450 ASSEMBLY

We recommend two persons are

used to build Boss Towers.

Always start building with the

smallest height frames at the base

of the tower:

’The procedure illustrated shows a tower

starting with a 2-Rung Frame’

1Push Castor onto Adjustable

Leg. Insert Adjustable Leg /

Castor assemblies into Frame

and lock castors.

(Alternatively use static Base Plates).

Tower Platform Height in Metres Frame of

Base

2.2 4.2 6.2 8.2 10.2 2 Rung

3.2 5.2 7.2 9.2 4 Rung

4Fit an additional Ladder Frame

and Span Frame. Ensure the

Interlock Clips are engaged.

Fit 2 Diagonal Braces (Blue) in

opposing directions, between the 1st

and 3rd rungs. Ensure the Frames are

vertical and level by checking with a

spirit level and setting the Adjustable

Legs as required.

Locked

Unlocked

INTERLOCK CLIP

12 Fit the Toeboards (see instructions

‘Fitting Toeboards’)

The Tower is now complete.

Locked

Unlocked

INTERLOCK CLIP

Locked

3Position the Ladder Frame as

shown.

Clip the other end of the Horizontal

Brace (Red) onto the Ladder Frame. Fit

another Horizontal Brace onto the

lowest horizontal rung of the Frames to

square the tower. Ensure the Frames

are vertical and level by checking with

a spirit level and setting the

Adjustable Legs as required.

5Fit 2 Diagonal Braces (Blue) in

opposing directions between

the 1st and 3rd Rungs.

Fit an additional Ladder Frame and

Span Frame. Ensure the Frame

Interlock Clips are engaged.

6Add Stabilisers.

See note on Stabilisers.

7Fit 4 Diagonal Braces (Blue) 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.

8Climb the Ladder 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.

9When building beyond a 3.2 m

platform height Tower -

Continue to add Span and

Ladder Frames, Diagonal Braces

and Trapdoor Platforms as

shown in the previous steps.

Always add Horizontal

Guardrails from the protected

position within the Trapdoor.

10 Fit the Toeboards (see

instructions ‘Fitting Toeboards’)

The Tower is now complete.

850 ASSEMBLY

We recommend two persons are

used to build Boss Towers.

Always start building with the

smallest height frames at the base

of the tower:

’The procedure illustrated shows a tower

starting with a 4-Rung Frame’

1Push Castor onto Adjustable

Leg. Insert Adjustable Leg /

Castor assemblies into Frame

and lock castors.

(Alternatively use static Base Plates).

Tower Platform Height in Metres Frame of

Base

2.2 4.2 6.2 8.2 10.2 2 Rung

3.2 5.2 7.2 9.2 4 Rung

4Fix a deck on the 2nd Rung

with the Trapdoor next to the

Ladder.

Fix Guardrails on the 3rd and 4th

Rungs on both sides of the Tower.

2Clip Horizontal Brace (Red) onto

the vertical of the Span Frame,

facing claws outwards.

Frame will now be self-supporting.

Locking claws should be primed

before use, and released for

dismantling or relocation.

Locked

TIES

Ties should be used when the

tower goes beyond its safe height

- beyond the limits of the

stabilisers/outriggers or where

there is a danger of instability.

They should be rigid, two way ties

fastened to both uprights of the

frame with load-bearing right

angled or swivel couplers. Only

couplers suitable for the 50.8 mm

diameter tube of the tower should

be used. Ideally ties should secure

to either face of a solid structure or

by means of anchorages.

The tie frequency may vary

depending on the application, but

they should, at a minimum, be at

every 4 metres height.

ERECTION

Check that all components are on site and that they are functioning correctly – See Quantity Schedule.

Ensure the ground on which the mobile access tower is to be erected and moved, is capable of

supporting the tower.

The MAXIMUM Safe Working Load (the combined weight of the user/s, tools and materials) that may be

placed on the Tower is the Total Weight less the Self Weight of the Tower.

EXAMPLE

A 1.45 m x 2.5 m Tower with a Platform Height of 4.2 m has a Self Weight of 201 kg.

950 kg 201 kg

TOTAL WEIGHT - SELF WEIGHT = 749 kg MAXIMUM Safe Working Load

The MAXIMUM Safe Working Load that may be placed on ANY Working Platform is 275 kg - This must be

evenly distributed over either one Trapdoor Platform (850), or a Fixed Platform and Trapdoor Platform (1450)

placed side by side.

Towers must always be climbed from the inside during assembly and using the built-in ladder provided

during use.

Adjustable Legs should only be used for levelling.

Do not use boxes or step ladders on the platform to gain additional height.

LIFTING OF EQUIPMENT

Tower components should be firmly secured by a reliable lifting material (eg rope), employing a reliable

Knot (eg clove hitch), to ensure safe fastening.

MOVEMENT

GENERAL NOTES TIES

USAGE ADVICE

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.

MAINTENANCE

All components and their parts should be regularly inspected to identify damage, particularly to welds. Lost or

broken parts should be replaced, and any tubing with indentations greater than 5mm should be put to one

side for manufacturer repair. Adjustable leg threads should be cleaned and lightly lubricated to keep them free

running.

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 m.p.h.), cease working on the tower. If the wind becomes a

strong breeze, expected to reach 11.3 metres per second (25 m.p.h.), tie the tower to a rigid structure.

If the wind is likely to reach gale force, over 18 metres per second (40 m.p.h.), the tower should be

dismantled.

Wind Beaufort Beaufort Speed in Speed in

Description Scale No. m.p.h. m/sec.

Medium Breeze Raises dust and loose 4 8-12 4-6

paper, twigs snap off.

Strong Breeze Large branches in motion, 6 25-31 11-14

telegraph wires whistle.

Gale Force Walking is difficult. 8 39-46 17-21

Beware of open ended buildings which can cause funneling effect..

Do not abuse equipment. Damaged or incorrect components should never be used.

Raising and lowering components, tools, and/or materials by rope should be conducted within the tower base.

Ensure that the safe working load of the supporting decks and the tower structure is

not exceeded.

The assembled tower is a working platform and should not be used as a means of access to other structures.

Beware of horizontal forces (eg power tools) which could generate instability. Maximum horizontal force 20

kg.

The stairway towers featuring an inclined staircase access are for use with personnel frequently carrying tools

and/or materials.

Mobile towers are not designed to be suspended - please refer to your supplier.

508_06.qxp:508_06.qxd 27/3/07 15:11 Page 2

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