扁钢 横杆 横杆 自重 扁钢 横杆 横杆 尺寸 间距 尺寸 kg/m2 尺寸 间距 尺寸 mm mm mm mm mm mm G605/30/100 100 93.4 G605/40/100 100 G605/30/50 50 96.2 G605/40/50 50 G555/30/100 100 85.1 G555/40/100 100 G555/30/50 50 88.2 G555/40/50 50 G505/30/100 100 78.9 G505/40/100 100 G505/30/50 50 82 G505/40/50 50 G455/30/100 100 71.6 G455/40/100 100 G455/30/50 50 74.5 G455/40/50 50 G405/30/100 100 63.7 G405/40/100 100 G405/30/50 50 66.9 G40