Access to a mezzanine floor is by the use of a staircase, RSA are able to offer a comprehensive designed all steel staircases constructed from 100x50x5mm Rectangular Hollow Section stringers. 50x50x2.5 Square Hollow Section posts. 50x25x2.5 Rectangular Hollow Section hand & knee rail which is generally more than acceptable for storage platforms and office floors. The steel treads are from 800mm to 1200mm wide with open or closed risers. The width and type of riser does depend on what the mezzanine floor will be used for. All materials used are calculated to BS 5950 Part 1. Designed to Part M / K of the current Building Regulations.