| 摘要 |
A two-web beam is provided to improve the compression and moment rigidity and to prevent a column and a girder from drooping. A two-web beam(1) is composed of side pipes(3,4), two webs(2) formed between the side pipes, a base plate in which the two-web beam is placed, a stiffener welded on the base plate, a combining hole formed in the base plate, a join bracket welded to a roof member, a finish plate welded on the two-web beam, and an assembling two-web beam.
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