GB706-88热轧工字钢
槽钢工字钢2热轧工字钢 (GB/T706-1988 )计算公式:W=0.00785d[h+f(b-d)] 备注:高度h,腿宽b,d为腰厚f值:一般型号及带a的为3.34,带b的为2.65,带c的为2.
GB706-88热轧工字钢