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85问答库 > 8.5米跨，底筋4根18的，上筋2根18的腰筋4根16的全是三级钢300⼀600的梁上面有30的空

8.5米跨，底筋4根18的，上筋2根18的腰筋4根16的全是三级钢300⼀600的梁上面有30的空

2025-04-07 03:26:30

推荐回答（1个）

回答1：

8.5米跨度，上要4根才行，跨度太大了，现在钢筋价格也便宜，也就岀一百块钱而已。三级钢我都能扳断，前年我在长沙建高铁就扳断了好多根，现在16的好像才四十块钱，18的最多也就五十块，我家里建的房子横梁全部用18的，最大跨度4.5米，250/400的，用6根……我建议你腰筋一边多加一根。

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