最好的工字钢国标规格

h b d t r r1Ix/cm4Wx/cm3ix/cm Ix:Sx Iy/cm4Wy/cm3iy/cm 27b①27012410.513.710.5 5.359.95447.064687050910.722.936658.9 2.47 30a①300126914.411 5.561.25448.084895059712.125.740063.5 2.55 30b①3001281114.411 5.567.25452.794940062711.825.442265.9 2.5 30c①3001301314.411 5.573.25457.504985065711.62544568.5 2.46 55a①55016812.52114.57.3134.185105.33562900229021.646.91370164 3.19 55b①55016814.52114.57.3145.185113.9765600239021.246.41420170 3.14 55c①55017016.52114.57.3156.185122.60568400249020.945.81480175 3.08

符号意义：

h—高度；r1—腿端圆弧半径；

b—腿宽度；l—惯性矩；

d—腰厚度；W—抗弯截面系数；t—平均腿厚度；

i—惯性半径；C—形心；

r—内圆弧半径；S—半截面的静力矩。