Prefabricated modular staircase construction - has shaped combined tread and riser units with interlocking formations, supported by pair of lateral shafts

摘要

The staircase is composed of side shafts (1) and tread elements (4) which may or may not have a surface finishing coating. The tread elements have a lip portion (2), a tread surface and an integral riser (3) with an upper flange (8) to engage the lip of an adjacent element. The treads include a channel (9) at their right-angled corner, which may receive a rod etc. to secure the surface coating. The treads are secured to the side shafts by end flanges engaging into pockets (5) attached to the inner shaft faces. ADVANTAGE - Rapid assembly and separation for surface recoating etc.