| 摘要 |
A support structure (1) for use in forming an externally reinforced concrete stairway includes a plurality of elongated C-channels (3) interconnected, preferably by welding to form a unitary body which serves as formwork receiving fluent concrete, and forms a stressed-skin to strengthen the hardened concrete externally. Riser plates 4 are secured to flanges of the C-channels and to brackets 5 by welding. Additional conventional reinforcement may be provided. The staircase is secured to landings by reinforcement or studs projecting from the landing and embedded in or secured to the staircase. <IMAGE> |
