SPIRAL STAIRCASES Spiral staircases are a feature to enhance any building. The smooth lines of the concrte are accentuated by the curve of the staircase, A choice of handratls is available upon request. Spiral staircases consist of individual cantilevering treads which are fixed around a central steel column and grouted in with a steel base plate at the bottom. They can be supplied with an intgral landing or fixed to an existing floor Landing Anchor units can be supplied for fixing to either existing floors or landlngs. Anchor treads will be cast with screw in sockets to boit onto the insitu floor on landing. Spiral staircases are suitable for both internai and external □se and can have non-slip strips applied for external use or carpet recesses for internai applications. AN spiral staircases are designed and manufactured in accordance with BS8110:1997 and fully conform to Part K 1.21 of the Building R詩gulations. Staircases can be supplied in either 1050mm, 1200mm, 1400mm, 1500mm radii or to a greater radius if required and are set at either 22.5° (16 treads for a full circle) or 18° (20 treads for a full circle) depending on the radius of the staircase,