Bilco BL-Z User manual

BL-Z Stairways conform to DIN 4570, are manufactured from high strength die-cast aluminium alloy
components and have a load bearing of 200kgs. The stairway is ed to a white coated
mul plex backboard (item 12); the height of the special backboard is variable, up to 2000mm high
by up to 1200mm wide.
The stairway is supplied with two heavy-duty counter-balanced springs (item 7), incorporated into
pivot brackets to ensure that the stairway can be raised and lowered with minimum effort.
All BL-Z stairway units are supplied with a telescopic handrail installed. Both sec ons are adjustable
and must be configured by the installer to suit their specific installa requirements. The bo
of the handrail is whereas the top sec n slides within the om sec to extend
and retract when the ladder is opened and closed. The securing screws on the underside of the
handrail fixing brackets should be used to adjust the length of the top se Ensuring that the
handrail doesn’t interfere/conflict with the interior of the hatch box or the roof hatch above, while
also achieving the maximum length possible within the installa
The maximum fixing height from the floor to underside of the backboard is 3390mm. Selec n of
the correct stairway for the floor level to fixing height is determined as follows:
BL-Z 1 stairway supplied with 9 treads, 350mm wide x 140mm deep, to suit a floor to
underside of the backboard height of 2250mm - 2500mm.
BL-Z 2 stairway supplied with 10 treads, 350mm wide x 140mm deep, to suit a floor to
underside of the backboard height of 2501mm - 2790mm.
BL-Z 3 stairway supplied with 11 treads, 350mm wide x 140mm deep, to suit a floor to
underside of the backboard height of 2791mm - 3090mm.
BL-Z 4 stairway supplied with 12 treads, 300mm wide x 140mm deep, to suit a floor to
underside of the backboard height of 3091mm - 3390mm.
Installing the Stairway
First, check that the correct stairway has been received to suit the actual floor to height as
detailed above.
Please Note: It is not possible to stretch the stairway out to its full length un it has been
fixed in posi on.
Please Note: The stairway must be d in the closed posi n.
We recommend that the backboard is securely fixed to the support structure using a minimum of 6
No. suitable screws (item 10), Ø8mm x 80mm, complete with Ø9mm washers (item 11).
The screws are not included with the stairway, as the correct screws/fixings depend on the actual
surface that the stairway is being fito. Ensure the backboard is fixed to solid structural material.
Once the stairway has been correctly fid, it can then be lowered to the floor surface.
Bilco UK Ltd, Pavilion 7, Fornham Business Court, Hall Farm
[phone] [email protected] www.bilcouk.co.uk
I BL-Z BK TS Bilco UK Rev.B 2021
Bilco UK is part of the Access 360 portfolio of Tyman UK and Ireland
Bilco products are designed and fabricated to
consistently high quality standards to ensure
complete customer satisfaction.
BL-Z RETRACTABLE LADDER: INSTALLATION

Adjustment of the touch-down point installing the stairway.
The actual touch-down point (floor contact) of the stairway can be adjusted to suit individual
stairways as follows:
Extend the stairway out to the desired touch-down point (15° is the minimum angle). Slacken the
lock nut (item 4) and turn the adjustment bolt (item 3) un l it stops. Tighten the lock nut; the
stairway will be set to extend to this touch-down point.
Once any adjustment has been carried out we would recommend that you check that the treads are
horizontal to the floor.
The angle of the treads can be adjusted by slackening the two nuts on the underside of each tread.
Reset all treads on the stairway so that they are horizontal.
the drop rate/speed installing the Stairway
Loosen the lock nuts (6), adjust the spring tension by turning the adjustment screw (5). Ensure that
care is taken that components do not twist out of posi on. The components must be aligned and
parallel to the opera arm (2). Hold the spring in posi (to prevent further rota and
misalignment) and ghten the lock nut.
Both springs must be adjusted equally.
the Spring Tension of the Stairway
The stairway is supplied with the correct spring tension, which is set at the factory. If the spring
tension needs to be adjusted we recommend that this is only carried out by a suitably qualified
Maintenance Engineer.
Please Note: Spring adjustment must be carried out with the stairway in the closed
on.
It is important that a Ø10mm x 300mm long steel bar (‘Tommy Bar’) is used in the loca ng holes of
the die-cast spring roller (item 8).
To increase the tension, place the steel bar in the hole next to the domed headed stud (item 9) and
rotate un the stud can be removed.
Rotate the spring roller un l it is possible to place the stud into the next hole adjacent to where the
stud was removed. Once it is safely in posi on allow the roller to rotate slowly back so that the stud
is back against the bracket and remove the steel bar.
Both springs must be adjusted equally.
Please Note: The Springs (item 7) are under high tension so extreme
and care must be taken when carrying out any adjustment.
It is important that the correct size Steel Bar is used, if any doubt
please contact us and ask to speak to a Technical Advisor.
Bilco UK Ltd, Pavilion 7, Fornham Business Court, Hall Farm
[phone] [email protected] www.bilcouk.co.uk
I BL-Z BK TS Bilco UK Rev.B 2021
Bilco UK is part of the Access 360 portfolio of Tyman UK and Ireland
Bilco products are designed and fabricated to
consistently high quality standards to ensure
complete customer satisfaction.