เหล็กท่อดำ
TIS / JIS STANDARDS
(TIS 1227 : 1996 / JIS G3192 : 1990)
Size & Properties
เหล็กท่อดำ
Standard Sectional Dimension (mm.)
Sectional Area (cm2)
Weight (kg./m.)
Reference
H x B
t1
t2
r1
r2
Position of Center of Gravity (cm.)
Moment of Inertia (cm4)
Radius of Gyration (cm.)
Modulus of Section (cm3)
Cx
Cy
lx
ly
lx
ly
Zx
Zy
75x40
5
7
8
4
8.818
6.92
0
1.28
75.3
12.2
2.92
1.17
20.1
4.47
100x50
5
7.5
8
4
11.92
9.36
0
1.54
188
26
3.97
1.48
37.6
7.52
125x65
6
8
8
4
17.11
13.4
0
1.9
424
61.8
4.98
1.9
67.8
13.4
150x75
6.5
10
10
5
23.71
18.6
0
2.28
861
117
6.03
2.22
115
22.4
150x75
9
12.5
15
7.5
30.59
24
0
2.31
1050
147
5.86
2.19
140
28.3
180x75
7
10.5
11
5.5
27.2
21.4
0
2.13
1380
131
7.12
2.19
15.3
24.3
200x80
7.5
11
12
6
31.33
24.6
0
2.21
1950
168
7.88
2.32
195
29.1
200x90
8
13.5
14
7
38.65
30.3
0
2.74
2490
277
8.02
2.68
249
44.2
250x90
9
13
14
7
44.07
34.6
0
2.4
4180
294
9.74
2.58
334
44.5
11
14.5
17
8.5
51.17
40.2
0
2.4
4680
329
9.56
2.54
374
29.9
300x90
9
13
14
7
48.57
38.1
0
2.22
6440
309
11.5
2.52
429
45.7
10
15.5
19
9.5
55.74
43.8
0
2.34
7410
360
11.5
2.54
494
54.1
12
16
19
9.5
61.9
48.6
0
2.28
7870
379
11.3
2.48
525
56.4
380x100
10.5
16
18
9
63.39
54.5
0
2.41
14500
535
14.5
2.76
763
70.5
13
16.5
18
9
78.96
62
0
2.33
15600
565
14.1
2.67
823
73.6
13
20
24
12
85.71
67.3
0
2.54
17600
655
14.3
2.76
926
87.8

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