| 摘要 |
PROBLEM TO BE SOLVED: To provide a dimensional accuracy stabilized stairs in which dimensional changes are reduced, which has excellent dimensional stability and the generation of the warping and torsion of side plates, treads and risers is reduced. SOLUTION: In the dimensional accuracy stabilized stairs composed of at least the side plates 10, the treads 101 installed to the side plates approximately horizontally and force girders or bottom plates (not shown) supporting the side plates and treads, the side plates 10 and the treads constitute the stairs of glued laminated wood, in which wood fibers are arrayed in multi-directions, dimensional accuracy stabilized lumbers such as lumber plywoods containing lumbers or the like or the dimensional accuracy stabilized lumbers such as the lumbers, in which these lumbers are combined. COPYRIGHT: (C)2004,JPO
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