Safe Access All Areas

01284 701696
Type BL-ZBox Retractable Ladder with Trap Door Product Image
Retractable Ladders
TYPE BL-ZBOX FR Retractable Ladder with Fire Rated Trapdoor

The BILCO industrial grade BL-ZBOX FR Retractable Ladder features heavy-duty counter-balancing springs to enable safe and controlled operation, and is supplied with fire rated timber lining and trapdoor to enclose the ladder from the underside.

Die-cast Aluminium alloy Retractable Ladder to EN 14975 designed for use with the CS-50TB Roof Access Hatch.

BL-ZBOX Fire Rated

Features / Benefits

Constructed with corrosion-resistant materials to provide many years of trouble-free, dependable service.

Available in standard or bespoke sizes to satisfy many access requirements or installations.

Fully compliant to EN 14975 

Designed for use with the CS-50TB Roof Access Hatch


Available with 30 or 90 minute fire ratings.

Hatch box and trapdoor feature a hollow metal design that is fabricated from 1.5mm Steel and insulated with mineral wool.

30 minute fire rating - 38mm thick mineral wool insulation
90 minute fire rating - 75mm thick mineral wool insulation

Lining features a flange around both ceiling and trapdoor to help prevent flame and smoke penetration.

Ceiling flange - 29mm wide
Flange around the trapdoor opening - 15mm wide


BL-ZBOX FR-1 height: < 2500mm / No. treads: 9 / tread size* 350x140mm / min hatch length: 1000mm

BL-ZBOX FR-2 height: 2500 - 2790mm / No. treads: 10 / tread size* 350x140mm / min hatch length: 1000mm

BL-ZBOX FR-3 height: 2791 - 3090mm / No. treads: 11 / tread size* 350x140mm / min hatch length: 1000mm

BL-ZBOX FR-4 height: 3091 - 3390mm / No. treads: 12 / tread size* 300x140mm / min hatch length: 1000mm

BL-ZBOX FR-5 height: 3391 - 3690mm / No. treads: 13 / tread size* 300x140mm / min hatch length: 1300mm

BL-ZBOX FR-SS Manufactured to special size on request

* alternate tread sizes are available - please contact us. (Note: 250mm wide treads do not comply to EN 14975 standards)

Handrail BL-Z ladders are supplied with a standard telescoping handrail on one side*

An additional handrail for the opposed side can be supplied if specified* 

*Handrail requires a minimum ceiling opening length of 1000mm.


Additional Handrail 
An additional handrail for the opposed side can be supplied if specified.

Insulated Trapdoor and Lining
Supplied with 63mm thick insulation. 

Increased Lining Depth
Can be supplied with lining depth up to 860mm.

Topside Operation
Supplied with a cable/pull-ring for access from above.

Electronic Operation
Trapdoor and stair can be opened and closed with a simple push of a button (see the video under the documents tab on this page).

Varnish Coating
Available for trapdoor and lining to protect the wood.

Additional Steps
Available for installation above the ceiling opening (see illustration)

Performance Standards BL-ZBOX Fire Rated


Guide Specification BL-ZBOX Fire Rated

LADDERDie-cast Aluminium alloy
TRAP DOOR18mm laminated wood (see options for fire rated box construction and insulated trapdoor/lining)
LINING500mm from the underside of the hatch to the trapdoor (in the closed position)
LOAD BEARING200kg per tread / Overall unit 500kg/m²
TREAD SIZEAvailable widths(mm) 200, 250, 300, 350, 380, 430, 530, 580. 200-380mm width tread depth = 140mm. 430-580mm width tread depth = 160mm
TREAD RISETypical tread rise 277-280mm (subject to floor-to-ceiling height)
LIFT ASSISTANCETwo heavy-duty springs incorporated to pivot brackets to counter-balance ladder weight on open/close

More info? Place an order? Get in touch today

Call us on 01284 701696 or email us >