| 摘要 |
PURPOSE:To elevate the supporting strength of a landing and to improve stairs strength by setting up the margin of the frame of a landing, where upward stairs and downward stairs are juxtaposed, on the ground, and holding this margin with a supporting panel which has a rectangular frame made of steel. CONSTITUTION:A stairs structure 2 is composed of a landing frame 3, upward stairs 8, downward stairs 9, etc., and is arranged in the recess of a house, and is supported by the framework 7 of the recess 7. And the landing frame 3 is made of outer and inner lateral materials 21 and 22, longitudinal materials 23 and 23, and a reinforcing material 24, using channel steels. Moreover, a supporting panel 5 is made, using channel steels, into a frame 39 which are composed of longitudinal materials 34 and 34, an upper material 35, and lattices 37 for reinforcement, and a surface material 40 is annexed to the outside for facing. Next, the top of the framework 39 and the lateral material 22 are united with bolts, and the bottom is erected on the foundation and the margin of the landing frame 3 is held. Hereby, the holding strength of the landing frame 3 can be elevated. |
