和其它型钢一样呀。
是不是不知
方钢的截面特征？
1,方25x1.5,25,1.5,131,11600（即：方25x1.5：边长25,壁厚1.5，截面面积A=131mm2；
惯性矩I=11600mm4；
截面模量W=I*2/H=928mm3；
回转半径i=根下(I/A)=9.4mm；单位重量:A*0.00785=1.028Kg/m)
2,方30x1.5,30,1.5,161,21100
3,方40x1.5,40,1.5,221,53300
4,方40x2.0,40,2,287,66600
5,方50x1.5,50,1.5,281,108200
6,方50x2.0,50,2,367,137100
7,方60x2.0,60,2,447,245100
8,方60x2.5,60,2.5,548,293600
9,方80x2.0,80,2,607,605800
10,方80x2.5,80,2.5,748,734000
11,方100x2.5,100,2.5,948,1479100
12,方100x3.0,100,3,1125,1731200
13,方120x2.5,120,2.5,1148,2608800
14,方120x3.0,120,3,1365,3067100
15,方140x3.0,140,3,1605,4956800
16,方140x3.5,140,3.5,1858,5682200
17,方140x4.0,140,4,2107,6379700
18,方160x3.0,160,3,1845,7496400
19,方160x3.5,160,3.5,2138,8613400
20,方160x4.0,160,4,2427,9693500
21,方160x4.5,160,4.5,2712,10736600
22,方160x5.0,160,5,2993,11744400