自建房5.5米跨度,要用多大钢筋,上面做墙 框架自建房长宽10米,5米跨度连续横梁放多大钢筋?
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至于大梁的规格就要考虑到承重和砖墙的厚度了,不过你的一楼大厅是悬空梁,所以建议你用25乘45的规格,保证你万无一失了
22的 下面三根上面2根就可以了,在加两根单勾,那也要看你的梁有好高,高了45MM以上要加水平筋
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