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1、 梁纵向钢筋单排最大根数 净保护层厚度（mm）： 25 30 35 40 梁纵向钢筋单排最大根数 (净保护层厚度：25mm）梁宽 b（mm）钢筋直径（mm）141618202225283236401502/32/322221/211120043/43/43332/3221/2250554/54/543/432/3223006/765/65/654/543/432/33507/876/76/765/64/543/434008/98/97/87/86/76/75/64/54/53/44509/109/108/98/97/97/86/75/64/54/550010/1210/1110/119/108
2、/107/96/86/75/64/555012/1311/1211/1210/119/118/107/96/85/75/660013/1412/1412/1311/1210/129/118/107/86/75/7梁宽 b14161820222528323640注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。梁纵向钢筋单排最大根数 (净保护层厚度：30mm）梁宽 b（mm）钢筋直径（mm）141618202225283236401502222221/21112003/433332/32/3221/225054/54/5443/432/32230065/65/654/
3、54/543/432/33507/86/76/76/75/65/64/543/434008/987/87/86/76/75/64/54/53/44509/109/108/98/97/86/86/75/64/54/550010/1110/119/109/108/97/96/86/75/64/555011/1211/1210/1110/119/108/107/96/85/75/660012/1412/1311/1311/1210/129/118/107/86/75/7梁宽 b14161820222528323640注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。梁纵向
4、钢筋单排最大根数 (净保护层厚度 35mm）梁宽 b（mm）钢筋直径（mm）14161820222528323640150222221/2111120033332/32/32221/22504/54/5443/43/432/3223005/65/6554/54/53/43/432/33507/76/76/765/65/64/543/434008/97/87/876/75/75/64/54/53/44509/108/98/98/97/86/86/75/64/54/550010/1110/119/109/108/97/96/85/75/64/555011/1211/1210/1110/119/10
5、8/107/96/85/75/660012/1412/1311/1211/1210/119/118/97/86/75/7梁宽 b14161820222528323640注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。梁纵向钢筋单排最大根数 (净保护层厚度 40mm）梁宽 b（mm）钢筋直径（mm）1416182022252832364015022221/21111120033332/32221/21/22504/54443/4332/3223005/65554/543/4332/33506/76/7665/64/54/53/43/434007/87/87/876/75/65/64/543/44508/108/98/987/86/75/75/64/54/550010/119/109/1098/97/86/85/75/64/555011/1210/1210/1110/119/108/97/86/75/75/660012/1311/1311/1211/1210/118/108/97/86/75/7梁宽 b14161820222528323640注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
