... boarding joist楼板搁棚,板条托梁... joist bearing托梁承座 bar joist轻钢搁架 ...
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There are very strict codes on removing, drilling or notching load bearing walls and floor joist.
有非常严格的代码去除，或缺口钻进墙壁和地板承载桁架。
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模块下移
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