BOSSCO Stairmax 700 MK2 User manual

BoSS Stairmax700 MK2 User Guide
Aluminium Tower
700 Climbing Rung
3T - Through The Trapdoor Method
USER GUIDE
STAIRMAX700 MK2

BoSS Stairmax700 MK2 User Guide
1
Contents
Safety First
Component Diagram
Component Quantity & Safety Data Schedule
Build Method
Pre-use Safety Inspection Checklist
9
10
11-12
13-19
20

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Safety First
Introduction
Contents
Please read this user guide carefully. Please note that
diagrams are for illustrative purposes only. User guides
are also available to download from our website at
bossaccesstowers.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 BoSS mobile
tower must have a copy of this user 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 user guides
or any other help with this product, please contact the manufacturer
on [phone] or email [email protected].

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Safety First
Safe use
•Check overhead that the area into which the structure is to be
erected contains no obstructions, particularly electrical or radio
radiation hazards.
•Ensure the ground on which the mobile access tower is to be
erected is capable of supporting the tower in use. Refer to Safety
Data Schedule.
•The tower has a single working level with a safe working load
of 275kg. All platforms may be used for working, but only one
should be used at any one time.
•Before each use:
•Check that each prefabricated tower scaffold is complete and
correctly assembled.
•Check that the prefabricated tower scaffold is vertical and make
any adjustments as required.
•Check that no environment changes will affect the safe use of
the structure.
•Adjustable legs should only be used for levelling purposes and
never to gain extra height.
•Do not use ladders, steps, boxes or similar, to gain additional
working height.
•Only climb the tower from the inside using the access method
provided.
•Tower scaffolds are not designed to be lifted or suspended.
•Beware of horizontal forces (e.g. power tools) which could
generate instability.
Maximum horizontal force per working bay = 30kg
•Tools and materials should be lifted using a reliable lifting material (e.g.
a strong rope) employing a reliable knot (e.g. clove hitch) to ensure
safe fastening and always lift within the footprint of the prefabricated
tower scaffold (i.e. within the area bounded by the stabilisers).
•Safe working loads, normally expressed in kN/m², are expressed
below in kg per dened working area.

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Safe use
Dened
working
area
Max. safe
working load
(uniformly
distributed
including
persons)
Load
class Max no. of persons*
A x Z 275kg 3 1
*Persons are assumed to be 122kg (Reference to HSE
- Revision of body size criteria in standards protecting
people who work at height - Research report 342)
Safety First
Access classes
The Access Class provided for climbing this tower is: Access Class
'D' (Vertical Ladder).
Lifting of individual tower components
Movement of the assembled prefabricated
tower scaffold
Raising and lowering components, tools and/or materials by rope
should be conducted within the tower base (i.e. within the area
bounded by the stabilisers). Ensure that the safe working load of
the supporting decks and the tower structure is not exceeded.
•The BoSS StairMAX 700 Mk2 tower system MUST NOT be
moved once erected.
•Always dismantle it and rebuild at the new location.
• The pre-use checklist on the nal page shall be used to
determine tower integrity.

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Safety First
During assembly, use and dismantling
•As part of the risk assessment, wind conditions must be taken
into account and reviewed regularly, depending on the duration
the structure is onsite.
•The structure has been assessed for wind loads equating to 27
mph (43 kph, 12 m/s).
•The effect of onsite wind conditions must be considered prior
to the assembly of a tower. The tower must not be used in wind
speeds stated above. If greater wind speeds are forecast, the
tower must be dismantled while it is still safe to do so.
•Sheets, tarpaulins, cladding or similar, must not be attached to
the tower as these will signicantly increase any side loads from
wind and will potentially make the tower unstable.
•Beware of wind turbulence, funnelling effects around buildings
and updraughts on stairways.
The maximum allowable side load on a tower is 30kg.
•CAUTION: Excessive side loads due to working from the
tower may cause the structure to become unstable. Special
consideration should be given to side loads including vibrations.
•Do not abuse equipment. Damaged, incorrect or incompatible
components should not be used.
Maintenance - Storage - Transport
•All components and their parts should be regularly inspected to
identify damage, particularly to joints. Lost or broken parts should
be replaced and any tubing with indentation greater than 5mm
shall be replaced. Adjustable leg threads should be cleaned and
lightly lubricated to keep them free running.
•Brace claws, frame interlock clips, trapdoor latches, camlocks and
platform wind-locks should be regularly checked to ensure they
lock correctly.
•Refer to the BoSS Inspection Manual for detailed inspection and
maintenance advice: www.bossaccesstowers.com
•Components should be stored in clean, dry conditions with due
care to prevent
•Ensure components are not damaged by excessive strapping
forces when transported.

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Safety First
Tower designation & safety data
Wind
Description Beaufort Scale Beaufort No. Speed in mph Speed in m/sec
Medium Breeze Raises dust and loose paper, twigs
snap off 4 8-12 4-6
Strong Breeze Large branches in motion, telegraph
wires whistle 6 25-31 11-14
Gale Force Walking is difcult 8 39-46 17-21
In accordance with the prefabricated tower scaffold standards,
the ‘Tower Designation & Safety Data’ shall be positioned at
the base of the prefabricated tower scaffold as shown within
the user guide, by means of the ‘Tower Designation Information
Assembly’. It must be clearly visible so that users are aware of the
conditions of safe use. Refer to Safety Data Schedule for content.
CAUTION:
Always ensure the portal ladder is in closed position when
descending the tower. If the portal ladder is in open position, from
the protected position of the trapdoor deck (i.e. seated) close the
portal ladder ensuring the locking claw has been fully engaged.
•The structure is highly conductive and must not be used when
there is a risk of lightning strikes.
•Exercise caution when touching unprotected metal components
in extreme high or low temperatures.
•If the tower is damaged in any way while in service, it shall not be
used again until the damaged components are replaced.

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Stabilisers
Props
• Stabilisers shall always be tted when
specied.
•Attach one stabiliser to each corner of the
tower as shown. Ensure stabilisers feet are
equally spaced to form a square.
•Telescopic stabilisers must always be fully
extended.
•Position the lower clamp so that the lower arm is as close to
horizontal as possible.Adjust the position of the upper clamp to
ensure the stabiliser foot is in contact with the ground. Ensure
clamps are secure.
Safety First
BoSS StairMAX 700 Mk2 tower with platform heights above 5.0m
shall be adequately propped or tied to prevent all movement in the
horizontal plane. They must be tted at a minimum of 4.0m vertical
intervals. To improve stability, additional props or ties can also be
tted at lower levels.
Props and ties should conform to the guidance in NASC TG20.
The method shown below illustrates the use of BoSS Conned
Space Stabilisers.
Attach one conned space stabiliser to each corner of the tower as
shown (see page 16). Ensure stabiliser feet are touching the walls -
adjust conned space stabilisers as necessary to achieve this.
If you require further advice, please contact the manufacturer.

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Assembly Procedure
Safety First
This tower structure must be assembled, and components
oriented, in accordance with this instruction manual.
Deviation from this instruction manual is not permitted.
A minimum of two persons are recommend for assembly and
disassembly of this prefabricated tower structure. The maximum
number of persons permitted on the tower during assembly is
stated in the safety data schedule.
Platforms must be installed with vertical distances between them
not exceeding 2m when assembling and dismantling.
The maximum number of people on a working platform level
permitted to simultaneously exert a horizontal load of 30kg is:
- 1 person per bay for bays less than 4m long and
- 2 persons per bay for bays greater than 4m in length
Check that all components, tools and safety equipment are on
site (refer to quantity schedule), undamaged and that they are
functioning correctly, particularly the brace claw locking mechanism.
Full inspection guidance can be found at www.bossaccesstowers.com.
Damaged or incorrect components shall not be used.
Component weights can be found in the quantity schedule and on
the corresponding BoSS Product Datasheets.
Check that the ground on which the tower structure is to be erected
and moved is capable of supporting the tower in use and within the
levelling limits of the tower system.
Check overhead that the area into which the tower structure is to be built
contains no obstructions, particularly electrical or radio radiation hazards.
Never stand on an unguarded platform positioned above the
rst rung of a tower structure. If your risk assessment shows it
necessary, you may also need to guardrail platforms at this level.
Tower components should be lifted using a reliable lifting material (e.g.
a strong rope) employing a reliable knot (e.g. clove hitch) to ensure
safe fastening and always lift within the footprint of the tower structure.
‘Tower Designation & Safety Data’ content for the ‘Tower
Designation Information Assembly’ can be found in the ‘Safety
Data Schedule’. This assembly must be positioned at the base of
the prefabricated tower scaffold and clearly visible for users. Refer
to Safety Data Schedule for content.
Adjustable legs should only be used for levelling purposes and
never to gain extra height.

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Assembly Procedure
Safety First
Ensure horizontal braces and guardrails are  tted correctly.
Ensure interlock clips on frame members are in the 'locked' position.
Ensure wind-locks are engaged before moving onto the deck levels.

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Ensure wind-locks are engaged before moving onto the deck levels.
Component Diagram
Component Diagram
Rear
Front
Aluminium
Folding
Toe Board Kit
1.64m
Diagonal
Brace
1.3m
Trapdoor
deck
Stabiliser
1.3m
Horizontal
Brace
1.64m
Diagonal
Brace
Upstair
End
Downstair
End
Confined Space
Stabiliser
Portal Ladder
Frame MK2
1.0m 4
Rung 700
Boss Solo
Frame
User
Guide
Tower Designation
Information
Assembly
Adjustable
Leg and Base
Plate

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Component quantity &
safety data schedule
(Working and Platform heights are measured from underside of lowest base plate.)
NOTE:
The safety data specied within the schedule above which relates to the specic
tower to be assembled must be transferred into the pre-dened boxes on the Tower
Designation Information insert found in the Tower Designation Information Kit.
Internal or external use Internal Use Only
Component Code Component
Description
Composite Code 61420300 61420500 61420700 61420900 61421100
Working Height (m) > 5.0 7.0 9.0 11.0 13.0
Platform Height (m) > 3.0 5.0 7.0 9.0 11.0
33041300 Base Plate 1.7 kg 4 4 4 4 4
33551300 Adjustable Leg 1.1 kg 4 4 4 4 4
67011000 1.0m 4 Rung 700 BoSS SOLO Frame 3.9 kg 3 7 11 15 19
33052600 Portal Ladder Frame Mk 2 12.8 kg 2 2 2 2 2
35651300 1.3m Horizontal Brace 1.6 kg 6 12 18 24 30
35751300 1.64m Diagonal Brace 1.9kg 5 8 11 14 17
67070100 1.3m Trapdoor Deck 9.8 kg 1 2 3 4 5
67040100 SP4 Stabiliser 4.4 kg 4 - - - -
31851300 SP10 Stabiliser 8.8 kg - 4 4 4 4
31651400 Conned Space Stabiliser 2.9 kg - - 8 8 12 67050100 Folding Toe Board Kit 4.4 kg 1 1 1 1 1
30001900 Designation Information Kit - 1 1 1 1 1
110137-01 User Guide - 1 1 1 1 1
BoSS StairMax700 Mk 2 - 1.3 x 0.7m
(Braces Guardrail)
Total Self Weight of Tower (kg) 99 158 222 262 315
Max. Exerted Leg Load (kg) 150 160 180 190 214
Max. Exerted Prop Load (kg) - - 16 16 16

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Component quantity &
safety data schedule
Build Method
When building a BoSS Tower
To comply with 'Work at Height Regulations' we show assembly
procedures with platforms every two metres in height and the
locating of guardrails in advance of climbing onto a platform to
increase safety and reduce the risk of a fall. Never stand on an
unguarded platform positioned above the  rst rung of a tower. If
your risk assessment shows it necessary, you may also need to
guardrail platforms at this level.
The procedure illustrated shows a 7.0m working height tower build.
The manufacturer recommend two persons are used to build
BoSS Towers. Above 4.0m platform height, it is essential that at
least two persons are used. Only climb the tower from the inside.
The manufacturer recommend the ‘Tower Designation &
Safety Data’ is recorded within the ‘Tower Designation
Information Assembly’ before proceeding with the tower
assembly. Refer to Safety Data Schedule for content.
Insert two base plates into adjustable legs and  t the leg
and base plate assemblies into one of the two portal ladder
frames. Repeat with the remaining legs and base plates. It is rec-
ommended, for ease of levelling, that a maximum gap of 50mm is
left between the bottom of the leg and the adjustable nut.
Note: Adjustable legs are for levelling only. They are not to be used
to gain extra height at the working level.
Fit one horizontal brace (red catch) onto the vertical of end
frame on the climbing side in position indicated with an arrow,
with the open section of the claw facing outwards. Ensure the gate
opens as shown.
1
2
Note: All locking claws must be opened before  tting and positively
locked into position.
Note: All locking claws must be opened before  tting and positively
locked into position.
D
↶
Ú

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Build Method
Position a second portal
ladder frame higher on
stairs as shown and  t other
end of horizontal brace just
above the bottom rung. Fit
another horizontal brace as
shown. This will become the
higher ‘upstair’ end of the
tower. Ensure both gates open
the same direction as shown.
3
Position a second portal
ladder frame higher on
stairs as shown and  t other
end of horizontal brace just
above the bottom rung. Fit
another horizontal brace as
shown. This will become the
tower. Ensure both gates open
the same direction as shown.
E
D
↶↶
Fit two diagonal braces
(blue catch) between
bottom rungs of both portal
ladder frames, one on each
side of the tower. Open
sections of claws must face
downwards. The structure
must be vertical to within 1cm
per metre.
Ensure the frames are
vertical and level by
checking with a spirit level
and setting the adjustable
legs as required.
4
DD

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Build Method
Connect two 4 rung frames
together and  t onto portal
ladder frame as shown. Engage
interlock clips. Fit one diagonal
brace in position shown. Record
‘Tower Designation & Safety Data’
within the ‘Tower Designation
InformationAssembly’and attach to
the tower in position shown. Refer
to safety data schedule for content.
5
D
E
D
Ensure interlock clips on
frame members are in the
'locked' position
Fit one 4 rung frame onto
the portal ladder frame
at the higher level by standing
on the stairs. Engage interlock
clips. Fit one more diagonal
brace as shown.
Fit Stabilisers.
See notes on page 7.
The upper clamp of stabilisers
must be at least 1.5m above
the bottom of the frame.
Where possible, stabilisers
must also have a minimum
outstand of 1.2m.
6
7
E
D
Where possible, stabilisers
must also have a minimum
Where possible, stabilisers
E

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M
Build Method
Fit one 1.3m trapdoor deck
onto the top rung of the
‘upstair’ portal ladder frame as
shown. Fit one diagonal brace
in position shown. Ensure the
trapdoor opens towards the rear
of the tower.
8
Ensure all wind-locks
are engaged.
Ensure all wind-locks
Ensure all wind-locks
shown. Fit one diagonal brace
in position shown. Ensure the
trapdoor opens towards the rear
Fit one 1.3m trapdoor deck
onto the top rung of the
‘upstair’ portal ladder frame as
shown. Fit one diagonal brace
Fit one 1.3m trapdoor deck
M
M
From the protected
position of the
trapdoor deck (i.e.
seated),  t guardrails at
0.5m and 1.0m (in that
order) above the platform
level. Fit two more
horizontal braces onto
the vertical of end frames
in positions shown.
9
horizontal braces onto
the vertical of end frames
in positions shown.
0.5m and 1.0m (in that
order) above the platform
level. Fit two more
From the protected
position of the
trapdoor deck (i.e.
seated),  t guardrails at
From the protected
M
Do not climb onto the deck until it is
fully guardrailed. Ensure the gate is
fully engaged before climbing.
Ensure all claws are
positively locked
into position
M
M

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M
M
M
Build Method
Connect two 4 rung
frames together to
create two subassemblies.
Engage interlock clips.
Whilst standing on the
protected platform deck,  t
one subassembly onto the
‘downstair’ end of the tower.
Again, engage interlock clips.
Repeat for the ‘upstair’ end
of the tower.
Fit two diagonal braces in
positions shown.
Ensure all claws are
positively locked into
position.
10
positively locked into
Fit two diagonal braces in
Ensure all claws are
positively locked into
Again, engage interlock clips.
Again, engage interlock clips.
Repeat for the ‘upstair’ end
Repeat for the ‘upstair’ end
Fit two diagonal braces in
Whilst standing on the
protected platform deck,  t
one subassembly onto the
‘downstair’ end of the tower.
‘downstair’ end of the tower.
Again, engage interlock clips.
Again, engage interlock clips.
Again, engage interlock clips.
Again, engage interlock clips.
Connect two 4 rung
frames together to
create two subassemblies.
Engage interlock clips.
Whilst standing on the
Connect two 4 rung
D
M
E
Fit one 1.3m trapdoor
deck onto the 8th
rung above the platform
deck as shown. Ensure
wind-locks are engaged.
Position platform to ensure
space for future diagonal
brace and aluminium folding
toe board set (see image
below).
11
space for future diagonal
brace and aluminium folding
toe board set (see image
deck as shown. Ensure
wind-locks are engaged.
Position platform to ensure
space for future diagonal
Fit one 1.3m trapdoor
deck onto the 8th
rung above the platform
deck as shown. Ensure
M
Top platform
position

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Build Method
From the protected
position of the trapdoor
deck (i.e. seated),  t guardrails
at 0.5m and 1.0m (in that
order) above the platform
level.
Do not climb onto the deck
until it is fully guardrailed.
Ensure the gate is fully
engaged before climbing.
Ensure all claws are positively
locked into position.
12
locked into position.
Ensure the gate is fully
engaged before climbing.
Ensure all claws are positively
locked into position.
Do not climb onto the deck
until it is fully guardrailed.
Ensure the gate is fully
deck (i.e. seated),  t guardrails
at 0.5m and 1.0m (in that
order) above the platform
Build Method
From the protected
position of the trapdoor
deck (i.e. seated),  t guardrails
M
Unclip storage strap from
aluminium folding toe board
set, unfold and  t into position on
working platform.
Ensure it sits squarely
around deck and does not
impede the opening of the
trap door in the deck.
The tower is now complete.
13
BoSS Stairmax
700
MK2
User Guide
The tower is now complete.
The tower is now complete.
D

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Build Method
When building beyond 5.0m platform height:
Continue to add two pairs of
assembled 4 rung frames,
six braces and one trapdoor
deck as shown in previous
steps. Add four con ned space
stabilisers as shown.At every
platform level add guardrails
above 2nd and 4th rungs above
the platform. Fit additional
guardrails above 1st rungs,
except working platform level.
Fit these braces from
the protected trapdoor
position. Do not climb onto
the platform until it is fully
guardrailed.
Continue until the required
height is reached.
At platform heights above
5.0m, con ned space
stabilisers must be  tted at
4.0m intervals as instructed
below and on page 5.
Fit a con ned space stabiliser
to all four corners of the tower
as shown ensuring that the
stabiliser arm is horizontal.
as shown ensuring that the
Fit a con ned space stabiliser
to all four corners of the tower
as shown ensuring that the
stabilisers must be  tted at
4.0m intervals as instructed
the platform until it is fully
except working platform level.
position. Do not climb onto
the platform until it is fully
platform level add guardrails
above 2nd and 4th rungs above
guardrails above 1st rungs,
except working platform level.
six braces and one trapdoor
steps. Add four con ned space
stabilisers as shown.At every
platform level add guardrails
When building beyond 5.0m platform height:
Continue to add two pairs of
D
E
E
D
Ensure the end of the stabiliser arm contacts the walls. If it does
not, adjust by unclipping and extracting the locking pin, sliding the
arm until correct length and hole alignment is achieved. Reinsert
the locking pin, ensuring clip is engaged. See images below.
Simply follow the assembly steps in reverse, ensuring that the 3T
method is followed.
To dismantle a BoSS tower:
Unclip & extract pin Extend/retract adjustable arm Reinsert pin and engage clip

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Pre-use Safety
Inspection Checklist
Description Yes
Tower structure upright and level
Base plates and legs correctly adjusted
Horizontal and diagonal braces tted
Stabilisers and props tted as specied
Platforms located and wind-locks engaged
Interlock clips engaged
Toe boards located
Guardrails tted correctly and positively locked
Tower designation information kit tted