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节点构造同题。支管CG与下弦主管间用角焊缝连接,焊缝全周连续焊接并平滑过渡,焊缝强度要求按施工条件较差的现场高空施焊考虑折减;焊脚尺寸hf=8mm。若已知焊缝长度lw=733mm,试问,该焊缝承载力的设计值(kN)与下列何项数值最为接近?()
A.938
B. 802
C. 657
D. 591
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