110 120 125 130 140 150 160 180 200 250 300 350 400 110 120 200 125 130 140 220 150 250 160 180 200 300 400 500 250 450 300 500 350 400 钢结构截面选择 跨度 (m) 2.0 1.0 30x50x4 40x40x4 30x60x4 40x60x4 50x50x4 40x80x4 50x70x4 60x60x4 40x80x4 50x90x4 60x80x4 50x90x4 60x90x4 80x80x4 50x100x4 60x120x4 80x120x4 60x120x4 80x120x4 100x100x4 80x120x4 100x150x4 80x140x4 100x150x4 1.5 30x50x4 40x60x4 40x80x4 50x70x4 60x60x4 40x80x4 50x90x4 60x80x4 50x90x4 60x90x4 80x80x4 60x120x4 80x120x4 100x100x4 60x120x4 80x120x4 100x100x4 80x120x4 100x150x4 80x140x4 100x150x4 80x160x4 100x150x4 2.0 30x60x4 40x60x4 50x50x4 40x80x4 50x70x4 60x80x4 40x90x4 50x90x4 60x80x4 80x80x4 60x120x4 80x120x4 100x100x4 60x120x4 80x120x4 100x100x4 80x120x4 100x150x4 80x140x4 100x150x4 80x160x4 100x150x4 100x180x5 线荷载设计值(N/mm) 2.5 3.0 3.5 40x60x4 40x80x4 40x80x4 50x70x4 50x70x4 50x70x4 60x60x4 60x60x4 60x60x4 40x90x4 40x90x4 40x80x4 50x90x4 50x90x4 50x90x4 60x80x4 60x80x4 60x80x4 80x80x4 80x80x4 50x90x4 60x90x4 80x80x4 60x120x4 80x120x4 100x100x4 60x120x4 80x120x4 100x150x4 80x140x4 100x150x4 80x160x4 100x150x4 100x180x5 100x180x5 50x100x4 60x120x4 80x120x4 60x120x4 80x120x4 100x100x4 80x120x4 100x150x4 80x140x4 100x150x4 80x160x4 100x150x4 100x180x5 100x180x5 60x120x4 80x120x4 100x100x4 60x120x4 80x120x4 100x100x4 80x140x4 100x150x4 80x160x4 100x150x4 100x180x5 100x180x5 100x200x5 4.0 40x80x4 50x70x4 60x80x4 50x90x4 60x90x4 80x80x4 60x120x4 80x120x4 100x100x4 80x120x4 100x150x4 80x140x4 100x150x4 80x160x4 100x150x4 100x180x5 100x180x5 100x200x5 4.5 40x80x4 50x70x4 60x80x4 50x90x4 60x90x4 80x80x4 60x120x4 80x120x4 100x100x4 80x120x4 100x150x4 80x160x4 100x150x4 100x180x5 5.0 40x80x4 50x90x4 60x80x4 50x100x4 60x90x4 80x120x4 60x120x4 80x120x4 100x100x4 80x140x4 100x150x4 80x160x4 100x150x4 100x180x5 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
100x180x5 100x180x5 140x220x6 100x180x5 100x200x5 140x220x6
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