8、.073.457.436A36013610.076.359.936B36013812.083.565.636C36014014.090.771.240A40014210.586.167.640B40014412.594.173.840C40014614.510280.1我来完善答案完善答案通过审核后,可获得3点工字钢理论重量计算公式双击自动滚屏 文案大全实用文档名称计算公式符号意义计算举例工字钢(kg/m)W=0.00785×[hd+2t(b-d)+0.615(R*R-r*r)]h=高 d=腰厚 b