- NIAB, Cambridge
- Spiral fire escape stairs
- SDC Builders Ltd
Fire escape spiral stair
This steel spiral staircase, like many of the external spiral staircases we produce, was galvanised for durability. Galvanising is a cost-effective way of preventing corrosion on external spiral staircases.
The escape stair was made from steel with treads in a non-slip pattern with drainage holes. The balustrade consisted of vertical uprights and perforated aluminium sheet infill panels.
This escape stairs is accessed by two large steel landings fabricated with non-slip decking and attached to the building. The steel spiral staircase itself is freestanding.
At a glance
|Floor to floor height:||3150mm, 2920mm|
|Risers:||17 @ 178.5mm, 16 @ 182.5mm|
|Clear tread width:||1000mm|
|Treads:||31 @ 1270mm radius, 4.5mm in non-slip plate|
|Balustrade:||Vertical uprights every third tread supporting a handrail with perforated aluminium infill panels|
|Landings:||2 x 1340mm x 3720mm landings with 3mm non slip decking and box frame|