IINNSSTTRRUUCCTTIIOONN MMAANNUUAALL EENN 11226688 -- IIMM -- eenn

Mobi le Access Tower

This Assembly Guide is intended to provide youwith step-by-step instructions on how to erectyour Mobile Access Tower (MAT) with ease andsafety, using the 3T (through the trap) method.You should read and understand all notes anddiagrams, including the parts list for eachheight, before commencing assembly.Personnel should be qualified or competent toerect this tower. Please consult the PASMAGuide for full information on the use of MobileAccess Towers.

Remember to do a riskassessment of the area

where the tower is tobe used beforecommencing erection.

Manufactured to EN 1004:2004 Class 3 8/12 XXXD

AA SSaaffeerr wwaayy ttoo rreeaacchh nneeww HHeeiigghhttss

IINNTTRROODDUUCCTTIIOONN

Description, Safety Notes and Fittings 2Components and Weights 6

Lift 1 Assembly 7Lift 2 Assembly 8Lift 3 Assembly 10Lift 4 Assembly 12

Dismantling 15Quantity Schedule 16Risk Assessment Form 17

A trading division of Aluminium Casting Ltd. Unit 3B, Celtic Road, Moss Side Industrial Estate, Callington, Cornwall, PL17 7SD

TEL: 01579 383513 www.basstowers.com

Mobile Access Tower

Contents

INSTRUCTION MANUAL

AA SSaaffeerr wwaayy ttoo rreeaacchh nneeww HHeeiigghhttss

The BaSS 700 folding tower is manufactured to EN 1004:2004 CLASS 3 8/12 XXXD and is KITEMARKED. The KITE MARK is the universal symbol that reassures the user that the product is certified toBSI stated standards.Instructions for erection and use to be followed carefully.A risk assessment should always be carried out before erecting your MAT (Mobile Access Tower). You will find a standard risk assessment form on page 17 of this instruction manual.The Bass 700 has a maximum working height of 8 metres outdoors and 12 metres indoors.The maximum permissable load on the Bass 700 tower is 500kgs and evenly distributed on the platform is 220kgs. This must not be exceeded.Damaged or incorrect components should never be used.

ERECTION & DISMANTLING

THE 3T METHOD

Towers should be erected following a safe method of work, there are two approved methods recommendedby 'prefabricated access suppliers and manufacturers'(PASMA) in co-operation with the health andsafety executive. The method used for erecting and dismantling the BASS 700 towers is the 3T METHOD(through the trap). This method ensures the operators erecting the tower, position themselves in the trapdoor of the platformto add or remove horizontal guardrail braces for the level above the platform.

NEVER STAND ON AN UNGUARDED PLATFORM.

Before assembly or erection of this Mobile Access Tower (MAT) please ensure that;A risk assessment has been done and all safety equipment is on site.The ground conditions will take the working loads as specified.Always check that the MAT is vertical, if levelling is required make sure Adjustable Legs (Part No.1026312-A2), in line with BS EN 1004 are available on site.Beware of overhead obstructions – live wires, electrical apparatus or moving parts of machinery or other.Wind conditions are within limits as specified.Do not use boxes, ladders or other devices on the platform to gain additional height.If in doubt DO NOT ERECT.Check that all components are on site and that they are in good working order before use (refer to the com-ponents and quantities shown at each stage).For your safety, during assembly and erection it is recommended that temporary horizontal guardrail bracesbe used. All working platforms MUST have horizontal guardrails fitted.The tower should always be accessed from the inside using the narrower side. Never climb up the outside. Do not use the guardrail braces as a rung or step. It is recommended that 2 persons erect this tower when being used over lift 2.The assembled tower should not be used as a means of access to other structures unless suitably tied.Beware of horizontal forces (e.g. when using power tools), which could generate instability or overturning ofthe tower.Maximum horizontal force 20kg.

2

SAFETY NOTESFor your safety you should never mix parts from other manufacturers

Description, Safety Notes & Fittings

STABILISERS & BALLAST

Stabilisers and/or Ballast must always be fitted where specified.When using the MAT externally at Lift 2 (1.670m assembly) and above, stabilisers must be fitted.Should ballast be required, a platform should be positioned on the lowest rung and the weights should be firmly attached to it and evenly distributed. For advice on ballast contact your supplier.

LIFTING OF EQUIPMENT

Tools and other equipment should be hauled up by a person on the platform using rope or similar, throughthe trapdoor of the platform or within the tower footprint. Please see footprint guide on page 16.

MOVING THE TOWER AND LEAVING IT UNATTENDED

Adjust the stabilisers to provide ground clearance.Unlock the castor wheels.Move with manual force only, and only from the base.Beware of overhead obstructions – live wires, hanging apparatus or other objects.Do not move with people or material on the tower.Do not move the assembled MAT if wind speeds exceed a moderate breeze. Relock the castors and readjust the stabilisers once in the new position.When moving the tower over rough or uneven sloping ground remove all tools.Do not move the assembled tower if over lift 3 (3.7 metres. Max free standing height 5.8 metres).Recheck that the MAT is vertical or needs readjustment before ascending.

TIES

When ties are required, they should be in accordance with table 17 of BS 5973:1990 and table 24 of BS 5975:1982. Always tie to a solid structure. The tie frequency should be at 4 metre intervals or less vertically.

FITTING TOE-BOARDS

Attach the END BOARDS (fitted with clips) to the climber section of the tower first, there are two slots depending on which side thebrace is fitted. Slide the side boards into the correct slot ensuring that objects cannot fall through and the trapdoor can open fully.

3

Fig. 1 opposite illustratesthe CORRECT way toclimb onto the platformof the assembled base unit

Fig. 1

Fig. 2

INSPECTION CARE AND MAINTENANCE FOR MOBILE ACCESS TOWERS

All components should be inspected before use to ensure that they are not damaged or broken, particularly the welds.ANY damage to ANY part particularly tubular members, castors, platform decking MUST be replaced.Adjustable leg threads should be cleaned and lightly oiled.The base unit locking joints and pivots should be lightly oiled.All locking claws should be cleaned and the locking mechanism checked for operation.When storing your MAT, please ensure that all components are neatly stored and not left laying aroundwhere they could be stood on or damaged. When transporting the MAT always tie the components down so that they do not move around and get damaged.Should the tower be left unattended it should be tied to a suitable structure and on reuse ALWAYS checkthat the tower is vertical and safe before ascending.The MAT is not designed to be lifted or suspended as a complete structure.Always keep this instruction manual safe.

WIND EFFECTS

Beware of high, gusty or moderate breeze conditions in exposed areas. It is recommended that in windspeeds over a Moderate Breeze (see Beaufort Scale below) that work on the tower is stopped andreassessed. If the wind becomes a Strong Breeze, (see Beaufort Scale below) the tower should be tied to arigid structure. If the wind is likely to reach Gale Force (see Beaufort Scale below) or over, work should bestopped and the tower should be dismantled.Beware of tunnelling effect caused by open ended buildings, uncladded buildings and building corners.

LOCKING CLIPS

Fit the locking clips as shown in the diagram opposite (fig .3).

4

Wind Beaufort Scale10 Metres above ground

Force Speed in m.p.h. Speed in knots

Moderate Breeze Raises dust and loose paper, small branches move.

4 13–18 11–16

Strong Breeze Large branches in motion, telegraph wires whistle.

6 25–31 22–27

Gale Force Walking is difficult, twigs break off trees.

8 39–46 34–40

Fig .3

LOCKING CASTORS

Castor wheels should be pointed outwards at approximately 45 degrees and locks engaged as shown in fig. 4 opposite.

FITTING STABILISERS

Attach a stabiliser to each corner of the tower at approximately 45 degrees for maximum stability (refer to relevent illustrations), and attach the clamps where indicated. On the S2 stabiliser use the telescopic leg for adjustment on uneven ground. Make sure that all stabilisers are firmly in contact with the ground when using the structure.

CORRECT FITTING OF HORIZONTAL BRACING

THE CORRECT FITTING OF HORIZONTAL BRACING IS IMPORTANT. The diagrams opposite illustrate the CORRECT brace positions. REMEMBER: Always fit bracesDOWNWARD or from the insidefacing OUTWARD –BUT NEVER INWARD

BRACE CLAMP LOCKING

Ensure that the brace clamp islocked as shown. Always makesure the brace is not clampedtoo close to the weld as indicated by the arrow on thedrawing on the right

FITTING ADJUSTABLE LEGS

Take the adjustable leg assembly complete with it’s castors, make sure that all the adjusting nuts are approximately at the same height and slide them into the vertical tube, turn the base unit the right way up and with the aid of a spirit level placed on the platform, the adjusting nuts can be used to level the structure.

5

Fig. 4

Fig. 5

Unlocked Locked

Fig. 6

6

Identifying Components And Their Weights

1. BASE UNITWeight: 24.0 Kgs

2. GUARDRAIL FRAMEWeight: 2.9 Kgs

3. HORIZONTAL BRACEWeight: 1.9 Kgs

4. STABILISER S1/S2/S3Weight: 5.8/9.8/12.7 Kgs

5. CASTOR WHEELWeight: 1.3 Kgs

6. TRAPDOOR PLATFORMWeight: 14.0 Kgs

7. DIAGONAL BRACEWeight: 2.0 Kgs

8. SIDE/END TOE-BOARDWeight: 3.2/1.0 Kgs

9. 2 METRE EXTENSIONWeight: 9.2 Kgs

10. ADJUSTABLE LEG ASSEMBLY (optional)Weight: 3.6 Kgs

2

8

9

4

5

510

3

7

6

1

10

Components

Position the Base Unit in close proximity to where you need to work and unfold the base unit (fig. 7).Push the horizontal frame members outwards until the locking joints click into position. Ensure both the locking joints are locked (fig. 8). To unlock the joint simply press the locking catch inwards.

Position the platform at the required height.BUT NO HIGHER THAN THE THIRD RUNG.Ensure the trapdoor platform is level.Push the unit into the correct position, turnthe castor wheels so that they point outwardsand engage the castor brake (fig. 4).Ensure wind locks are engaged on platform.

The base unit is now fully assembled and ready for use. Should adjustable legs be required remove fitted castors and installadjustable leg assembly.

7

PLATFORM HEIGHT: 0.870M SAFE WORKING HEIGHT: MAXIMUM 2.700M (no ballast required)

Components required:1 x Base Unit Complete with castor wheels or adjustable legs (optional)1 x Trapdoor Platform

Lift 1: Base Unit Assembly

1

2

3

Fig. 7

Fig. 8

Fig. 9

1

6

Following on from LIFT 1 Procedure. Remove the trapdoor platform, and fit one horizontal guardrail brace to the bottom rung (fig. 10).

Insert the guardrail frames onto the spigots and lock the clips (fig. 10).

Fit a diagonal brace, attaching it from the 5th rung of the base unit to the 1st rung ofthe opposite guardrail frame (fig. 11).

Components required:1 x Base Unit 1 x Trapdoor Platform 2 x Guardrail Frames 5 x Horizontal Braces1 x Diagonal Brace 4 x S1 Stabilisers (if required) 1 x Set of Toe-Boards

8

Lift 2: Base Unit With Guardrail

Assembly

1

2

3

Fig. 11Fig. 10

1

2

7

6

3

4

8

PLATFORM HEIGHT: 1.670MSAFE WORKING HEIGHT MAXIMUM: 3.700M — With Stabilisers S1(no ballast required)

Fit the horizontal guardrail braces to the sides of the guardrail frames.

Place the platform on the 2nd rung and whilst standing on the platform fit the second set of horizontal guardrail braces to the top rung of the guardrail frames.

Now fit the stabilisers to the tower (as in fig. 12) ensure that the stabilisers are onthe ground and are firmly fixed to the tower.

Remove the trapdoor platform from the 2nd rung and fit to the top rung of the baseunit, ensuring that the wind locks are engaged (see below). Now attach the Toe-boards. The unit is now fully assembled and ready for use.

9

Assembly (cont’d)

4

5

6

7

PLEASE TAKE NOTENever place the platform on the guardrail frameAlways climb from the inside of the frame – never the outside. When working on the platform never over reachThe end frames should provide a firm hand hold

Fig. 12

Fig. 13

Wind Locks

10

Components required:1 x Base Unit 2 x Trapdoor Platform 2 x Guardrail Frames2 x 2 Metre Extension Frames9 x Horizontal Guardrail Braces4 x Diagonal Braces4 x S1 Stabiliser1 x Set of Toe-Boards

Lift 3: Fitting The 2 Metre Extension

PLEASE TAKE NOTE

All lift extensions fromhere on require 2people for assembly.

Assembly

Following on from LIFT 1 Procedure. Remove the trapdoor platform, and fit one horizontal guardrailbrace to the bottom rung.

Standing inside the base unit fit the 2 metre extension frames onto the spigots and lock the clips.

Place a temporary trapdoor platform on the 3rd rung of the base unit. LOCK WIND LOCKS.

Fit 2 horizontal guardrail braces to the 4th rung of the 2 metre extension frame, and fit the diagonalbraces and S1 stabilisers as shown in fig. 15. Ensure the stabilisers are on the ground and firmlyfixed to the tower.

1

2

3

4

1

6

2

9

3

7

4

8

Fig. 14 Fig. 15

PLATFORM HEIGHT: 3.700M — STABILISERS MUST BE FITTEDSAFE WORKING HEIGHT MAXIMUM: 5.600M (With Stabilisers S1)BALLAST REQUIRED: Indoors — Nil. Outdoors — S1 100Kgs/S2 25Kgs

11

Now move the temporary platform to the 2nd rungof the 2 metre extension frame. Whilst sitting onthe platform, fit temporary horizontal guardrailbraces (fig. 16), guardrail frames, diagonal bracesand horizontal guardrail braces (fig. 17).

Now move the trapdoor platform down 2 rungs. LOCK WIND LOCKS. Whilst seated fit 2 horizontalguardrail braces to the 2nd rung of the 2 metreextension frame.

Fit the next trapdoor platform to the top rung of the extension frame. LOCK WIND LOCKS.Remove the temporary horizontal braces from the 6th rung.

Fit horizontal guardrail braces to the guardrailframe (fig. 18).

Complete the structure by fitting the toe-boardsmaking sure that the trapdoor can open and closewithout obstruction (see toe-board assembly).

5

6

7

8

9

Assembly (cont’d)

Fig. 16 Fig. 17

Fig. 18

12

Components required:1 x Base Unit 3 x Trapdoor Platform 2 x Guardrail Frames4 x 2 Metre Extension Frames13 x Horizontal Guardrail Braces7 x Diagonal Braces4 x S2 Stabilisers1 x Set of Toe-Boards

Lift 4: Extension to 5.8 Metre Height

NOTE:

S2/S3 Stabilisers

MUST be fitted

Assembly

Following on from LIFT 1 Procedure. Remove the trapdoor platform, and fit one horizontal guardrailbrace to the bottom rung.

Standing inside the base unit fit the 2 metre extension frames onto the spigots and lock the clips.(fig. 19)

Fit a temporary trapdoor platform on the 3rd rung of the base unit. LOCK WIND LOCKS.

Fit 2 horizontal guardrail braces to the 4th rung of the 2 metre extension frame, diagonal braces andS2 stabilisers (fig. 20). Ensure that the stabilisers are on the ground and are firmly fixed to the tower.

1

2

3

4

1

6

2

9

3

7

4

8

Fig .19 Fig. 20

PLATFORM HEIGHT: 5.800M SAFE WORKING HEIGHT MAXIMUM: 7.800MBALLAST REQUIRED: Indoors — Nil. Outdoors — S2 100Kgs/S3 Nil

13

Now move the temporary platform to the 2nd rung of the 2 metre extension frame. Whilst sitting on the platform, fit the temporary horizontal guardrail braces to the 6th rung, fit the 2nd 2 metreextension frames and diagonal braces (fig. 21).

Fit the next trapdoor platform to the 2nd rung of the 2nd 2 metre extension frame. LOCK WINDLOCKS. Whilst sitting on this platform fit horizontal guardrail braces to the 4th rung and a temporaryguardrail brace to the 6th rung.

Fit the 5th and 6th diagonal braces, guardrail frames and the 7th diagonal brace. Also fit 2 horizontal guardrail braces to the bottom rung of the guardrail frame (fig. 22).

5

6

7

Assembly (cont’d)

Fig. 21 Fig. 22

14

Move both platforms down 2 rungs, fit horizontal guardrail braces to the 2nd rung of the 1st 2 metreextension and remove temporary horizontal guardrail braces from the 6th rung, repeat this procedure for the 2nd 2 metre extension.

Fit the next trapdoor platform to the top rung of the 2nd 2 metre extension frame. LOCK WINDLOCKS. Sitting on this platform, fit horizontal guardrail braces to the top of the guardrail frame.Finally fit the toe-boards ensuring the trapdoor can open and close without obstruction. The tower is now fully assembled (fig. 23).

8

9

Fig. 23

Assembly (cont’d)

15

Dismantling

The dismantling procedure should follow the assembly steps in reverse order, take particular attention with regard to the removal of guardrails and platforms.

You should ensure that you are standing in a safe position and protected by guardrails at all timesNEVER remove diagonal braces or stabilisers prematurely.

After removing the toe-boards the operator disengages the horizontal guardrail brace clamps furthest from the trap door, horizontal guardrail braces are then removed with the operator positioned through the trap door before descending to the lower level, from where the upper platform and extensions/guardrail frames can be removed.

NOTES

DO NOT OVER-REACH and NEVER DROP COMPONENTS when dismantling always lowerthem to the ground.

16

Component Quantities per Lift

Lift 1 Lift 2 Lift 3 Lift 4

Folding Base Unit 1 1 1 1

Trapdoor Platform 1 1 2 3

2 Metre Extension 2 4

Diagonal Braces 1 4 7

Horizontal Braces 5 9 13

Toe-Board Kit 1 1

Guardrail Frames 2 2 2

Stabiliser S1 4 4

Stabiliser S2/S3 4

Quantity Schedule In Components

Internal/External Use

Working Height (m) 2.7m 3.7m 5.6m 7.8m

Platform Height (m) 0.8m 1.7m 3.7m 5.8m

STABILISERS

Attach one stabiliser to each corner of tower atapprox. 45 degrees. The bottom clamp shouldbe fitted as low as possible, refer to the diagramopposite. Ensure that all four rubber feet are incontact with the ground and that the clamps aresecured. Position stablisers as shown in the diagrams.

When using the S2/S3 stabilisers, always extendthe telescopic legs to their maximum positionand lock into position with the interlock clip.

When moving the tower lock each telescopic legjust clear of the ground, unlock castors ensuringarea is firm and clear of all obstructions both onthe ground and above. After moving check allcastors are firmly on the ground and locked, andthat the tower is vertical. Re-position stabilisers as above.

STABILISERS S1

STABILISERS S2

3.2m

1.3m

2.3m

2.9m

4.6m

4.2m

NO

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BaSSBritish Aluminium Scaffold Systems.

A trading division of Aluminium Casting Ltd.Unit 3B, Celtic Road, Moss Side Industrial Estate, Callington, Cornwall, PL17 7SD

TEL 01579 383513 WWW.BASSTOWERS.COM

IINNSSTTRRUUCCTTIIOONN MMAANNUUAALL EENN 11229988 -- IIMM -- eenn

Mobi le Access Tower

This Assembly Guide is intended to provide youwith step-by-step instructions on how to erectyour Mobile Access Tower (MAT) with ease andsafety, using the 3T (through the trap) method.You should read and understand all notes anddiagrams, including the parts list for eachheight, before commencing assembly.Personnel should be qualified or competent toerect this tower. Please consult the PASMAGuide for full information on the use of MobileAccess Towers. Remember to do a riskassessment of the area where the tower isto be used before commencing erection.

Manufactured to BS EN 1004:2004 Class 3 8/12D

AA SSaaffeerr wwaayy ttoo rreeaacchh nneeww HHeeiigghhttss

IINNTTRROODDUUCCTTIIOONN

Description, Safety Notes and Fittings 2Components and Weights 6

Assembly 7

Dismantling 14Risk Assessment Form 16

A trading division of Aluminium Casting Ltd. Unit 3B, Celtic Road, Moss Side Industrial Estate, Callington, Cornwall, PL17 7SD

TEL: 01579 383513 www.basstowers.com

Mobile Access Tower

Contents

INSTRUCTION MANUAL

AA SSaaffeerr wwaayy ttoo rreeaacchh nneeww HHeeiigghhttss

The Bass 1400 tower is manufactured to BS EN 1004:2004 CLASS 3 8/12D and is KITE MARKED. The KITE MARK is the universal symbol that reassures the user that the product is certified to BSI stated standards.Instructions for erection and use to be followed carefully.A risk assessment should always be carried out before erecting your MAT (Mobile Access Tower). You will find a standard risk assessment form at the back of this instruction manual.The Bass 1400 has a maximum working height of 10 metres outdoors and 14 metres indoors.The maximum permissable load on the Bass 1400 tower is 950kgs and evenly distributed on each platform is 275kgs. This must not be exceeded.Damaged or incorrect components shall not be used.

ERECTION & DISMANTLING

THE 3T METHOD

Towers should be erected following a safe method of work, there are two approved methods recommendedby 'prefabricated access suppliers and manufacturers' (PASMA) in co-operation with the health andsafety executive. The method used for erecting and dismantling the Bass 1400 tower is the 3T METHOD(through the trap). This method ensures the operators erecting the tower position themselves in the trapdoor of the platform to add or remove horizontal guardrail braces for the level above the platform.

NEVER STAND ON AN UNGUARDED PLATFORM.

Before assembly or erection of this Mobile Access Tower (MAT) please ensure that;A risk assessment has been done and all safety equipment is on site.The ground conditions will take the working loads as specified.Always check that the MAT is vertical, if levelling is required make sure Adjustable Legs (Part No.1026312-A2), in line with BS EN 1004 are available on site.Beware of overhead obstructions – live wires, electrical apparatus or moving parts of machinery or other.Wind conditions are within limits as specified.Do not use boxes, ladders or other devices on the platform to gain additional height.If in doubt DO NOT ERECT.Check that all components are on site and that they are in good working order before use (refer to the components and quantities shown at each stage).For your safety, during assembly and erection it is recommended that temporary horizontal guardrail bracesbe used. All working platforms MUST have horizontal guardrails fitted.The tower should always be accessed from the inside using the ladder frames provided. Never climb up the outside. Do not use the guardrail braces as a rung or step. It is recommended that 2 persons erect this tower.The assembled tower should not be used as a means of access to other structures unless suitably tied.Beware of horizontal forces (e.g. when using power tools), which could generate instability or overturning ofthe tower.Maximum horizontal force 20kgs.

2

SAFETY NOTESFor your safety you should never mix parts from other manufacturers

Description, Safety Notes & Fittings

STABILISERS & BALLAST

Stabilisers and/or Ballast must always be fitted where specified.When using the MAT externally stabilisers must be fitted.Should ballast be required, a platform should be positioned on the lowest rung and the weights should be firmly attached to it and evenly distributed. For advice on ballast contact your supplier.

LIFTING OF EQUIPMENT

Tools and other equipment should be hauled up by a person on the platform using rope or similar, throughthe trapdoor of the platform or within the tower footprint. Please see footprint guide on page 14.

MOVING THE TOWER AND LEAVING IT UNATTENDED

Adjust the stabilisers to provide ground clearance.Unlock the castor wheels.Move with manual force only, and only from the base.Beware of overhead obstructions – live wires, hanging apparatus or other objects.Do not move with people or material on the tower.Do not move the assembled MAT if wind speeds exceed a moderate breeze. Relock the castors and readjust the stabilisers once in the new position.When moving the tower over rough or uneven sloping ground remove all tools.Do not move the assembled tower if over 4 metres high.Recheck that the MAT is vertical or needs readjustment before ascending.

TIES

When ties are required, they should be in accordance with table 17 of BS 5973:1990 and table 24 of BS 5975:1982. Always tie to a solid structure. The tie frequency should be at 4 metre intervals or less vertically.

FITTING TOE-BOARDS

Attach toe-board clips over the outer most deck claws and clipping onto the tube as illustrated opposite.Insert toe-board into the slots on as shown.

3

Fitting Toe-boards

INSPECTION CARE AND MAINTENANCE FOR MOBILE ACCESS TOWERS

All components should be inspected before use to ensure that they are not damaged or broken, particularly the welds.ANY damage to ANY part particularly tubular members, castors, platform decking MUST be replaced.Adjustable leg threads should be cleaned and lightly oiled.All locking claws should be cleaned and the locking mechanism checked for operation.When storing your MAT, please ensure that all components are neatly stored and not left laying aroundwhere they could be stood on or damaged. When transporting the MAT always tie the components down so that they do not move around and get damaged.Should the tower be left unattended it should be tied to a suitable structure and on reuse ALWAYS checkthat the tower is vertical and safe before ascending.The MAT is not designed to be lifted or suspended as a complete structure.Always keep this instruction manual safe.

WIND EFFECTS

Beware of high, gusty or moderate breeze conditions in exposed areas. It is recommended that in windspeeds over a Moderate Breeze (see Beaufort Scale below) that work on the tower is stopped andreassessed. If the wind becomes a Strong Breeze, (see Beaufort Scale below) the tower should be tied to arigid structure. If the wind is likely to reach Gale Force (see Beaufort Scale below) or over, work should bestopped and the tower should be dismantled.Beware of tunnelling effect caused by open ended buildings, uncladded buildings and building corners.

LOCKING CLIPS

Fit the locking clips as shown in the diagram opposite.

4

Wind Beaufort Scale10 Metres above ground

Force Speed in m.p.h. Speed in knots

Moderate Breeze Raises dust and loose paper, small branches move.

4 13–18 11–16

Strong Breeze Large branches in motion, telegraph wires whistle.

6 25–31 22–27

Gale Force Walking is difficult, twigs break off trees.

8 39–46 34–40

Locking clips

LOCKING CASTORS

Castor wheels should be pointed outwards at approximately 45 degrees and locks engaged as shown opposite.

FITTING STABILISERS

Attach a stabiliser to each corner of the tower at approximately 45 degrees for maximum stability (refer to relevent illustrations), and attach the clamps where indicated. On the S2 stabiliser use the telescopic leg for adjustment on uneven ground. Make sure that all stabilisers are firmly in contact with the ground when using the structure.

CORRECT FITTING OF HORIZONTAL BRACING

THE CORRECT FITTING OF HORIZONTAL BRACING IS IMPORTANT. The diagrams opposite illustrate the CORRECT brace positions. REMEMBER: Always fit bracesDOWNWARD or from the insidefacing OUTWARD –BUT NEVER INWARD

BRACE CLAMP LOCKING

Ensure that the brace clamp islocked as shown. Always makesure the brace is not clampedtoo close to the weld as indicated by the arrow on thedrawing on the right

FITTING ADJUSTABLE LEGS

Take the adjustable leg assembly complete with it’s castors, make sure that all the adjusting nuts are approximately at the same height and slide them into the vertical tube, turn the base unit the right way up and with the aid of a spirit level placed on the platform, the adjusting nuts can be used to level the structure.

5

Press to engage — lift to disengage

Unlocked Locked

6

Identifying Components And Their Weights

1. 2 RUNG FRAMEWeight: 4.7 Kgs

2. 2 RUNG LADDERFRAMEWeight: 8 Kgs

3. HORIZONTAL BRACEWeight: 1.9 Kgs

4. STABILISER S1/S2/S3Weight: 5.8/9.8/12.7 Kgs

5. ADJUSTABLE LEG ASSEMBLYWeight: 4.3 Kgs

6. TRAPDOOR PLATFORMWeight: 14.0 Kgs

7. DIAGONAL BRACEWeight: 2.0 Kgs

8. SIDE/END TOE-BOARDWeight: 3.2/1.0 Kgs

9. 4 RUNG LADDERFRAMEWeight: 16 Kgs

10. 4 RUNG FRAMEWeight: 9 Kgs

8

9

4

2

5

3

7

6

1

5

Components and Approx Weights

10

Insert adjustable leg assembly (with castors or base plates) into the base of a rung frame,repeat this with a rung ladder frame. Lock all castor wheels.

Attach one horizontal brace to the inside of the rung frame just above the bottom rung, claws facing outwards. This frame will now be self-supporting.

Position the ladder frame as shown. Connect the other end of the horizontal brace to the ladderframe. Now connect the frames using a secondhorizontal brace on the opposite side lockingdownwards, this will square the tower.

7

Bass recommends that a minimum of two people is required for the assembly of the Bass 1400 tower. Only climb the tower from the inside using the ladder section.

Access platform/working height; For even platform height towers (2m/4m/6m) you MUST start with a 2 RUNG FRAME.For odd platform height towers (3m/5m/7m) ALWAYS start with a 4 RUNG FRAME.For intermediate height platform towers (2.5m/3.5m/4.5m) ALWAYS start with a 3 RUNG FRAME.

Assembly Procedure

1

2

3

PLEASE TAKE NOTENever place the platform on the guardrail frameAlways climb from the inside of the frame – never the outside. When working on the platform never over reachThe end frames should provide a firm hand hold

Fig. 1

Fig. 2

Fig. 3

Insert 4 rung frames to correspond with the 2 rung frames (fig. 3) and lock the locking clips (refer to page 4). Attach diagonal braces on both sides from the 1strung to the 3rd rung of the structure, in opposing directions. Place a solid deck platform on the 1st rung and a trap door platform on the 4th rung, both on the ladder side of the structure. Attach wind locks.

8

Assembly (cont’d)

4

Fig. 4

Wind Locks

Attach stabilisers as required for working height (see table page 15). Climb the ladder and from a protected through the trapdoor position, attach horizontalguardrail braces to the 5th and then 6th rungs, on both sides of the platform. Never climb onto a platform that is not fully guardrailed. Guardrails should be 1 and 2 rungs above platforms in all cases.

9

Assembly (cont’d)

5

Fig. 5

10

Assembly (cont’d)

6 Attach 2nd pair of diagonal braces following on from the previous ones. Attach the next 4 rung frames and lock clips (as per fig. 6).

Fig. 6

11

7

Assembly (cont’d)

If completing the tower at this height (4m), continue with step 8. When buildingbeyond this level, repeat steps 4, 5 and 6 until desired level is achieved, then complete the tower with steps 8 and 9.

Fig. 7

12

Assembly (cont’d)

8 Fit the final diagonal braces as shown. This stage will provide a platform height of4m. Attach diagonal braces as per fig. 7. The fixed platform should be moved up tothe 8th rung and moved across to the far side of the structure, the trapdoor platformcan now be fitted alongside it. LOCK WIND LOCKS. Climb up the ladder and from a protected ‘through the trapdoor’ position, fit horizontal guardrail braces to the 9th and then the 10th rungs on both sides of the tower. Complete the towerassembly by following step 9.

Fig. 8

13

9

Assembly (cont’d)

Fit toe boards to all working platforms. (see instructions on page 3)

Fig. 9

14

Dismantling

The dismantling procedure should follow the assembly steps in reverse order, take particular attention with regard to the removal of guardrails and platforms.

You should ensure that you are standing in a safe position and protected by guardrails at all timesNEVER remove diagonal braces or stabilisers prematurely.

After removing the toe-boards the operator disengages the horizontal guardrail brace clamps furthest from the trap door, horizontal guardrail braces are then removed with the operator positioned through the trap door before descending to the lower level, from where the upper platform and extensions/guardrail frames can be removed.

NOTES

DO NOT OVER-REACH and NEVER DROP COMPONENTS when dismantling always lowerthem to the ground.

Attach one stabiliser to each corner of tower at approx. 45 degrees. The bottom clamp should be fitted as low as possible, refer to the diagram opposite. Ensure that all four rubber feet are in contact with the ground and that the clamps are secured. Position stabilisers as shown in the diagrams.

When using the S2/S3 stabilisers, always extend the telescopic legs to their maximumposition and lock into position with the interlock clip.

When moving the tower lock each telescopic leg just clear of the ground, unlock castorsensuring area is firm and clear of all obstructions both on the ground and above.After moving check all castors are firmly on the ground and locked, and that the tower is vertical. Re-position stabilisers as above.

STABILISERS S1

STABILISERS S2

Stabilisers

STABILISERS S3

Des

crip

tion

Wo

rkin

g H

eig

ht (M

)P

latf

orm

Hei

ght

4.2

2.2

4.7

2.7

5.2

3.2

5.7

3.7

6.2

4.2

6.7

4.7

7.2

5.2

7.7

5.7

8.2

6.2

8.7

6.7

9.2

7.2

9.7

7.7

10.2

8.2

Cas

tors

44

44

44

44

44

44

4

300m

m T

hrea

ded

Ad

just

able

Leg

44

44

44

44

44

44

4

Bas

s 14

00 2

Run

g La

dd

er F

ram

e1

11

11

11

Bas

s 14

00 2

Run

g Fr

ame

11

11

11

1

Bas

s 14

00 3

Run

g La

dd

er F

ram

e1

11

11

1

Bas

s 14

00 3

Run

g Fr

ame

11

11

11

Bas

s 14

00 4

Run

g La

dd

er F

ram

e1

12

12

23

23

34

34

Bas

s 14

00 4

Run

g Fr

ame

11

21

22

32

33

43

4

1.8m

or

2.5m

Fix

ed P

latf

orm

12

11

12

11

12

11

1

1.8m

or

2.5m

Tra

p D

oor

Pla

tfor

m1

12

22

23

33

34

44

1800

or

2500

Hor

izon

tal B

race

66

1010

1010

1414

1414

1818

18

2100

or

2700

Dia

gona

l Bra

ce3

45

67

89

1011

1213

1415

2100

or

2500

Lon

g To

e B

oard

22

22

22

22

22

22

2

End

Toe

Boa

rd2

22

22

22

22

22

22

Toe

Boa

rd H

old

ers

44

44

44

44

44

44

4

S1

Sta

bili

ser

44

44

44

44

S2

Ad

just

able

Sta

bili

ser

44

44

Ap

pro

x To

wer

Sel

f-W

eigh

t (k

gs) 1

800

103

146

161

169

175

195

210

217

224

257

272

279

286

Ap

pro

x To

wer

Sel

f-W

eigh

t (k

gs) 2

500

120

169

185

194

201

226

243

251

258

296

313

321

328

10.7

8.7

11.2

9.2

11.7

9.7

12.2

10.2

12.7

10.7

13.2

11.2

13.7

11.7

14.2

12.2

44

44

44

44

44

44

44

44

11

1

11

1

11

11

11

11

45

45

56

56

45

45

56

56

21

11

21

11

45

55

56

66

1822

2222

2626

2626

1617

1819

2021

2223

22

22

22

22

22

22

22

22

44

44

44

44

44

44

44

306

320

328

334

354

369

377

383

354

370

378

385

411

427

436

443

Quantity Schedule

to B

S E

N 1

004:

2004

Ava

ilab

le in

tw

o le

ngth

s; 1

.8m

& 2

.5m

15

NO

DATE

NO

TE

Site &

Location

Assessm

ent carried out b

y:

Signed

MA

IN A

CTIV

ITY/S

ITUATIO

N

NO

Activity/Location

Hazard

s Identified

A B

C R

isk Rating E

quip

ment to b

e used

B C

Risk R

ating Action B

y

Materials/Tools etc

(B x C

)to m

inimise risk

(B x C

)

A – P

ersonnel at R

iskB

– Severity

C – P

rob

ability

Negligib

le1

Imp

ossible

1P

robab

le5

Em

ployee

EM

inor Injury2

Imp

robab

le2

Frequent

6

Contractor

CS

erious Injury3

Rem

ote3

Pub

licF

Major Injury

4O

ccasional4

Risk value key: 1 – 4 =

Accep

table, 5 – 9 =

Med

ium – Investigate and

where p

racticable red

uce the risk, 10 – 14 = H

igh –A

ction must b

e taken to reduce the risk

15

– 24

= V

ER

YH

IGH

–R

ISK

IS T

OO

HIG

H T

O S

TA

RT

WO

RK

OR

CO

NT

INU

E, W

OR

K M

US

T B

E S

TO

PP

ED

RISK

ASSESSM

ENT C

OM

PLETIO

N FO

RM

British Aluminium Scaffold Systems. A trading division of Aluminium Casting Ltd.

Unit 3B, Celtic Road, Moss Side Industrial Estate, Callington, Cornwall, PL17 7SDTEL 01579 383513 WWW.BASSTOWERS.COM