h-高度；b-腿宽；d-腰厚；t-平均腿厚；r-内圆弧半径；r1-腿端圆弧半径型 号hb尺 寸dt（mm）10100554.57.27.02.512120644.87.37.53.014140734.97.58.03.016160815.07.88.53.518180905.18.16.03.518a1801005.18.39.03.5202001005.28.49.54.020a2001105.28.69.54.0222201105.48.710.04.022a2201205.48.910.04.0242401155.69.510.54.024a2401255.69.810.54.0272701256.09.811.04.527a2701356.010.211.04.5303001356.510.212.05.030a3001456.510.712.05.0333301407.011.213.05.0363601457.512.314.06.0404001558.013.015.06.0454501608.614.216.07.0505001709.515.217.07.05555018010.316.518.07.06060019011.117.820.08.0656502001219.222.09.0707002101320.824.010.070a7002101524.024.010.070b70021017.528.224.010.0注 （1）轻型工字钢的通常长度：10~18号工字钢5~19m；20~70号工字钢长6~19m。 （2）制造钢号：A3，A3F等。
240x115x5.6-YB193-93
A3F-YB170-63
rr1截面面积(cm2)12.014.717.420.223.425.426.828.930.632.834.837.540.243.246.549.953.861.971.483.097.8114132153176202243理论重量(kg/m)9.4611.513.71518.419.921.022.724.025.827.329.431.533.936.539.242.248.656.165.276.889.8104120138158184 （3）标记举例：普通碳素钢甲类平炉3号沸腾钢240mmX115mmX5.6mm的热轧轻型工字钢的标记为： 热轧轻型工字钢
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