| 边长（mm) |
截面面积(cm2) |
理论重量 (kg/m) |
边长（mm) |
截面面积(cm2) |
理论重量(kg/m) |
| 5mm |
0.25 |
0.196 |
30mm |
9.00 |
7.06 |
| 6mm |
0.36 |
0.283 |
32mm |
10.24 |
8.04 |
| 7mm |
0.49 |
0.385 |
34mm |
11.56 |
9.07 |
| 8mm |
0.64 |
0.502 |
36mm |
12.96 |
10.17 |
| 9mm |
0.81 |
0.636 |
38mm |
14.44 |
11.24 |
| 10mm |
1.00 |
0.785 |
40mm |
16.00 |
12.56 |
| 11mm |
1.21 |
0.95 |
42mm |
17.64 |
13.85 |
| 12mm |
1.44 |
1.13 |
45mm |
20.25 |
15.90 |
| 13mm |
1.69 |
1.33 |
48mm |
23.04 |
18.09 |
| 14mm |
1.96 |
1.54 |
50mm |
25.00 |
19.63 |
| 15mm |
2.25 |
1.77 |
53mm |
28.09 |
22.05 |
| 16mm |
2.56 |
2.01 |
56mm |
31.36 |
24.61 |
| 17mm |
2.89 |
2.27 |
60mm |
36.00 |
28.26 |
| 18mm |
3.24 |
2.54 |
63mm |
39.69 |
31.16 |
| 19mm |
3.61 |
2.82 |
65mm |
42.25 |
33.17 |
| 20mm |
4.00 |
3.14 |
70mm |
49.00 |
38.49 |
| 21mm |
4.41 |
3.46 |
75mm |
56.25 |
44.16 |
| 22mm |
4.84 |
3.80 |
80mm |
64.00 |
50.24 |
| 24mm |
5.76 |
4.52 |
85mm |
72.25 |
56.72 |
| 25mm |
6.25 |
4.91 |
90mm |
81.00 |
63.59 |
| 26mm |
6.76 |
5.30 |
95mm |
90.25 |
70.85 |
| 28mm |
7.84 |
6.15 |
100mm |
100.00 |
78.50 |
表注 : (1) 在标准件中，边长105~250毫米的方钢未列出截面面积及重量，必要时可参照表列数据的倍数进行算。
(2) 方钢的长度规定如下：
A.通常长度（非定尺的）：
普通钢：
边长≤25mm …………………………………………长5~10m
边长26~50mm ….………………………………………长4~9m
边长53~110mm ….……………………………………长4~8m
边长≥120mm ….…………………………………………长3~6m
优质钢：
各种边长尺寸 …………………………………………………长2~6m
B.定尺长度（合同中确定）
C.倍尺长度（合同中确定）
