Astex Pharmaceuticals, Cambridge
- Astex Pharmaceuticals, Cambridge
- Spiral fire escape stairs
- SDC Builders Ltd
Fire escape spiral stair
This was a galvanised steel spiral staircase with durbar treads. The balustrade was made up of perforated sheet infill panels fixed to post brackets with steel tubular handrails.
To access the spiral escape stairs we installed a small straight staircase that led over the roof parapet to a push latch gate and walkway. This gave access to the escape stairs and created a comprehensive means of escape from the building.
At a glance
|Floor to floor height:||5345mm|
|Risers:||29 @ 184.31mm|
|Tread radius:||27 @ 1250mm|
|Clear tread width:||1008mm|
|Tread type:||4.5mm durbar plate|
|Balustrade:||Steel 38mm diameter tubular handrail with perforated steel infill panels connected at every third tread by a 48mm diameter post.|
|Landings:||1 x intermediate rest landing 1 x special connector landing 3500mm x 1254mm in 3mm durbar|
|Additional:||Straight staircase from special landing to roof space made up of 6 1105mm wide straight treads in 4.5mm durbar|