| 摘要 |
PROBLEM TO BE SOLVED: To provide a stairs for imparting a light impression with a lightweight structure, and superior in production/construction efficiency. SOLUTION: A tread 12 is supported by a three-dimensional truss structure 10 composed of mutually parallel two strips of upper chord members 10A and 10A, a connecting material 3 for connecting the upper chord members 10A and 10A, a strip of a lower chord member 10B positioned at a lower position of the middle of the upper chord members 10A and 10A and a lattice material 4 for connecting the upper chord members 10A and 10A and the lower chord member 10B. The upper chord members 10A and 10A are composed of a plurality of frame materials 1 connected by hubs 2A being nodal point members, and the lower chord member 10B is composed of a plurality of frame materials 1 connected by hubs 2B. COPYRIGHT: (C)2004,JPO
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