| 摘要 |
PURPOSE:To ensure a temporary passageway which is safe and functional, during a body construction period with the use of permanent PC stairs. CONSTITUTION:Stairs are formed of four kinds of components, that is, landing PC plates 1, upper stage floor PC plates 3 and step part PC plates 2, 4 which are separately manufactured, and the PC plates 1 to 4 are supported by forms 5 and timbers 9 which are integrally incorporated so that a vertical load is born by bars 5a while a horizontal load is born by polywood plates 5b so as to temporarily build the stairs. Thereafter, PC walls are placed around the stairs so as to permanentally build the stairs. With the precedence of building of the PC stairs, it is possible to enhance the safety, to save labor and to effect a cost reduction. |
