A spiral steel staircase suitable for a wide range of applications from Residential to Industrial, and complying with the requirements of BS.5395: Part 2.

Available in any diameter, rising clockwise or anti-clockwise to suit customers requirements. Construction is based on a tubular centre column which is fully load bearing and capable of supporting a landing or floor joists.

Treads are set at 221/2° (16 per circle) and are constructed from solid Durbar pattern plate welded to a tubular collar to fit over the centre core column. Alternative type treads and landings are available such as pan type. Landings are provided to fit existing situations where details are available or to suit new applications. Handrails comprise of a 42.4mm dia. tube supported on 20mm dia. balusters that also serve to secure the outer extremities of the treads, and together, they form a rigid construction.

Additional balusters are required for stairs in residential situations in order that any gaps do not exceed 100mm. All parts are prefabricated for easy site assembly. Spirals of 2.0m diameter or less require relaxation of Building Regulations regarding minimum tread ‘go’. The 2.2m diameter spiral will give 800mm clear width of stair when fitted with an inside handrail to comply with Building Regulations.

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