| 摘要 |
PROBLEM TO BE SOLVED: To provide a wooden door which is lightweight and has high wind pressure-resistant strength, even if it is upsized. SOLUTION: An aluminum plate 100 in a shape almost corresponding to a shape of a surface of a paulownia laminated plate 24 is joined onto the at least one surface of the paulownia laminated plate 24 with a structure in which a plurality of wooden plates 21-23 formed of paulownia wood with an air-dried specific gravity of 0.3 or less are laminated together. COPYRIGHT: (C)2008,JPO&INPIT
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