|
对边距离S
mm
|
允许偏差,
mm
|
截面面积A,
cm2
|
理论重量,
kg/m
|
|
1组
|
2组
|
3组
|
六角钢
|
八角钢
|
六角钢
|
八角钢
|
|
8
|
±0.25
|
±0.35
|
±0.40
|
0.544 3
|
-
|
0.435
|
-
|
|
9
|
0.701 5
|
-
|
0.551
|
-
|
|
10
|
0.866
|
-
|
0.680
|
-
|
|
11
|
1.048
|
-
|
0.823
|
-
|
|
12
|
1.247
|
-
|
0.979
|
-
|
|
13
|
1.464
|
-
|
1.15
|
-
|
|
14
|
1.697
|
-
|
1.33
|
-
|
|
15
|
1.949
|
-
|
1.53
|
-
|
|
16
|
2.217
|
2.120
|
1.74
|
1.66
|
|
17
|
2.503
|
-
|
1.96
|
-
|
|
18
|
2.808
|
2.683
|
2.20
|
2.16
|
|
19
|
3.126
|
-
|
2.45
|
-
|
|
20
|
3.464
|
3.312
|
2.72
|
2.60
|
|
21
|
±0.30
|
±0.40
|
±0.50
|
3.819
|
-
|
3.00
|
|
|
22
|
4.192
|
4.088
|
3.29
|
3.15
|
|
23
|
4.581
|
-
|
3.60
|
-
|
|
24
|
4.988
|
-
|
3.92
|
-
|
|
25
|
5.413
|
5.175
|
4.25
|
4.06
|
|
26
|
5.854
|
-
|
4.60
|
-
|
|
27
|
6.314
|
-
|
4.96
|
-
|
|
28
|
6.790
|
6.492
|
5.33
|
5.10
|
|
30
|
7.794
|
7.452
|
6.12
|
5.85
|
|
32
|
±0.40
|
±0.50
|
±0.60
|
8.868
|
8.479
|
6.96
|
6.66
|
|
34
|
10.011
|
9.572
|
7.86
|
7.51
|
|
36
|
11.223
|
10.731
|
8.81
|
8.42
|
|
38
|
12.505
|
11.956
|
9.82
|
9.39
|
|
40
|
13.86
|
13.25
|
10.88
|
10.40
|
|
42
|
15.28
|
-
|
11.99
|
-
|
|
45
|
17.54
|
-
|
13.77
|
-
|
|
48
|
19.95
|
-
|
15.66
|
-
|
|
50
|
21.65
|
-
|
17.00
|
-
|
|
53
|
±0.60
|
±0.70
|
±0.80
|
24.33
|
-
|
19.10
|
-
|
|
56
|
27.16
|
-
|
21.32
|
-
|
|
58
|
29.13
|
-
|
22.87
|
-
|
|
60
|
31.18
|
-
|
24.50
|
-
|
|
63
|
34.37
|
-
|
26.98
|
-
|
|
65
|
36.59
|
-
|
28.72
|
-
|
|
68
|
40.04
|
-
|
31.43
|
-
|
|
70
|
42.53
|
-
|
33.30
|
-
|
重量计算公式：六角钢W(kg/m)=0.0068*S2
八角钢W(kg/m)=0.0065*S2
注:表中的理论重量按密度7.85g/cm3计算。表中截面面积(A)计算公式:
A=1/4nS2tgф/2*1/100
六角形A=3/2S2tg300*1/100≈0.866S2*1/100
八角形A=2S2tg22030'*1/100≈0.828S2*1/100
|
