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1、热轧型钢 Hot-rolled section steel GB/T 706-2008(代替GB/T 706-1988、GB/T 707-1988、GB/T 9787-1988、GB/T 9788-1988、GB/T9946-1988)槽钢的截面图示及标注符号如下图所示。h-长边宽度；b-短边宽度；I-惯性矩；d-腰厚度；W-截面系数；r-内圆弧半径i-惯性半径；r1-边端圆弧半径；Z0-重心距离，t-平均腿厚度型号尺寸/mm截面面积/cm2理论重量/(kg/m)参考数值X-XY-YY1-Y1Z0/cmhbdtrr1Wx/cm3Ix/cm4ix/cmWY/cm3IY/cm4iY/cmIY1/c
2、m4550374.57.07.03.56.9285.43810.426.01.943.558.31.1020.91.356.363404.87.57.53.88.4516.63416.150.82.454.5011.91.1928.41.366.565404.37.57.53.88.5476.70917.055.22.544.5912.01.1928.31.38880435.08.08.04.010.2488.04525.31013.155.7916.61.2737.41.4310100485.38.58.54.212.74810.00739.71983.957.8025.61.4154.91
3、.5212120535.59.09.04.515.36212.05957.73464.7510.237.41.5677.71.6212.6126535.59.09.04.515.69212.31862.13914.9510.238.01.5777.11.5914a140586.09.59.54.818.51614.53580.55645.5213.053.21.701071.7114b140608.09.59.54.821.31616.73387.16.95.3514.161.11.691211.6716a160636.510.010.05.021.96217.2401088666.2816.
4、373.31.831441.8016b160658.510.010.05.025.16219.7521179356.1017.683.41.821611.7518a180687.010.510.55.225.69920.17414112707.0420.098.61.961901.8818b180709.010.510.55.229.29923.00015213706.8421.51111.952101.8420a200737.011.011.05.528.83722.63717817807.8624.21282.112442.0120b200759.011.011.05.532.83725.
5、77719119107.6425.91442.092681.9522a220777.011.511.55.831.84624.99921823908.6728.21582.232982.1022b220799.011.511.55.836.24628.45323425708.4230.11762.213262.0324a240787.012.012.06.234.21726.86025430509.4530.51742.253252.1024b240809.012.012.06.039.01730.62827432809.1732.51942.233552.0324c2408211.012.0
6、12.06.043.81734.39629335108.9634.42132.213882.0025a250787.012.012.06.034.91727.41027033709.8230.61762.243222.0725b250809.012.012.06.039.91731.33528235309.4132.71962.223531.9825c2508211.012.012.06.044.91735.26029536909.0735.92182.213841.9227a270827.512.512.56.239.28430.838323436010.535.52162.343932.1
7、327b270849.512.512.56.244.68435.077347469010.337.72392.314282.0627c2708611.512.512.56.250.08439.316372502010.139.82612.284672.0328a280827.512.512.56.240.03431.427340476010.935.72182.333882.1028b280849.512.512.56.245.63435.823366513010.637.92422.304282.0228c2808611.512.512.56.251.23440.219393550010.4
8、40.32682.294631.9530a300857.513.513.56.843.90234.463403605011.741.12602.434672.1730b300879.513.5135.6.849.90239.173433650011.444.02892.415152.1330c3008911.513.513.56.855.90243.883463695011.246.43162.385602.0932a320888.014.014.07.048.51338.083475760012.546.53052.505522.2432b3209010.014.014.07.054.913
9、43.107509814012.249.23362.475932.1632c3209212.014.014.07.061.31348.131543869011.952.63742.476432.0936a360969.016.016.08.060.91647.8146601190014.063.54552.738182.4436b3609811.016.016.08.068.11053.4667031270013.666.94972.708802.3736c36010013.016.016.08.075.31059.1187461340013.470.05362.679482.3440a400
10、10010.518.018.09.075.06858.9288791760015.378.85922.8110702.4940b40010212.518.018.09.083.06865.2089321860015.082.56402.7811402.4440c40010414.518.018.09.091.06871.4889861970014.786.26882.7512202.42槽钢的高度h、腿宽度b、腰厚度d尺寸允许偏差应符合表2的规定。高度（h）高度允许偏差图示1000.151002000.202004000.304000.40腿宽度（b）1502.01502002.52003003.03004003.54004.0腰宽度（d）1000.41002000.52003000.73004000.84000.9外缘斜度（T）T1.5%b2T2.5%b弯腰挠度（W）W1.5%d弯曲度每米弯曲度3mm总弯曲度总长度的0.30%型钢的长度应符合表3的规定。 表3型钢的长度允许偏差长度/mm允许偏差/mm8000mm+5008000mm+800槽钢计算理论重量时，钢的密度为7.85g/cm3。槽钢截面积的计算公式为 hd+2t(b-d)+0.349(r2-r12)根据双方协议，槽钢每米质量允许偏差不得超过