| 摘要 |
PURPOSE:To eliminate projections from a wall to make designed look better in bearing construction of an intermediate landing in PC stairs and to enable the execution of the intermediate landing. CONSTITUTION:Recessed channels 1a are formed to the insides of wall PC boards 1 on both sides of PC stairs, both of an intermediate landing PC board 2a are inserted in the recessed channels 1a mentioned above of the wall PC boards 1, and a steel plate 5 fixed to both sides of the intermediate landing PC boards 2a and a steel plate 4 fixed to the wall PC boards 1 are welded and connected through a connection member at the proper places of both sides of the intermediate landing PC board 2a. In the case the intermediate landing is constructed, at least one of the wall PC boards 1 on both sides of the intermediate landing is inclined to widen the upper side thereof, and the intermediate landing PC board 2a is suspended from above and is moved to a specific position between the wall PC boards 1 on both sides. After that the inclined wall PC boards 1 are pushed so as to make them to fix intermediate landing PC boards 2a between a pair of wall PC boards 1. |
