Space-saving stairs steel hatch F90 with retractable stairwaype

In public buildings, our weather-resistant solution for the installation in reinforced concrete ceilings, which belong to the fire resistance class F90, have proven very reliable. The upper cover is clad with galvanised sheet steel and has a circumferential double seal. As accessory element, you can purchase a lockable cover that prevents unauthorised access from the outside.

Technical Features:

Steel hatch F90
- Certified 90 minutes from below
* according to DIN4102 Part 2 by MPA Stuttgart
- Installation in reinforced steel cement ceilings from 180 mm that belong to min. F90 classes according to DIN 4102-4
Energy label
- Component: 0.29 W/m²K*
- Bottom cover: 0.93 W/m²K*
- Top cover: 0.68 W/m²K*
* calculated by manufacturer according to DIN EN ISO 6946
Energy efficiency
- Circumferential seal (quadruple)
- Thermal insulation in the covers
Upper cover
- Metal flashing with galvanised sheet steel
- Closure: bar lock
- Prepared for customer-provided profile cylinder
- Edge glued for protection against weather
- incl. rubber hollow profile seal (double) with contact lip for roof membrane
- Side customer-provided insulation max. 40 mm
- Impermeable to driving rain (Class E1200)
Hatchbox / cover
- Sheet steel, primed
- With circumferential profile frame
- Snap-lock closure
- Case height: 33 (steel case)
- Wooden insert: water resistant
- Installation allowance 2 cm
Stairs
- Aluminium retractable stairways
- Treads: 20-38, 14 cm deep (made of pressure die-casting)
- Treads: 43-58, 16 cm deep (made of aluminium profile)
- Load bearing 200 kg
Ready-to-install with standard accessories
- Telescoping handrail
- Operating pole