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）rr1截面面积(cm)12.014.717.420.223.425.426.828.930.632.834.837.540.243.246.549.953.861.971.483.097.81141321531762022432理论重量(kg/m)10100554.57.27.02.59.4612120644.87.37.53.011.514140734.97.58.03.013.716160815.07.88.53.51518180905.18.16.03.518.418a1801005.18.39.03.519.9202001005.28.49.54.021.020a2001105.28.69.54.022.7222201105.48.710.04.024.022a2201205.48.910.04.025.8242401155.69.510.54.027.324a2401255.69.810.54.029.4272701256.09.811.04.531.527a2701356.010.211.04.533.9303001356.510.212.05.036.530a3001456.510.712.05.039.2333301407.011.213.05.042.2363601457.512.314.06.048.6404001558.013.015.06.056.1454501608.614.216.07.065.2505001709.515.217.07.076.85555018010.316.518.07.089.86060019011.117.820.08.0104656502001219.222.09.0120707002101320.824.010.013870a7002101524.024.010.015870b70021017.528.224.010.0184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。
（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
240x115x5.6-YB193-93
A3F-YB170-63
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