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尺  寸

特  性**

公稱*尺寸

壁厚

每英尺重量

截面積

I

S

r

ln.

ln.

Lb.

ln.2

ln.4

ln.3

ln.

6×6

.5000

1/2

35.24

10.4

50.5

16.8

2.21

.3750

3/8

27.48

8.08

41.6

13.9

2.27

.3125

5/16

23.34

6.86

36.3

12.1

2.30

.2500

1/4

19.02

5.59

30.3

10.1

2.33

.1875

3/16

14.53

4.27

23.8

7.93

2.36

5×5

.5000

1/2

28.43

8.36

27.0

10.8

1.80

.3750

3/8

22.37

6.58

22.8

9.11

1.86

.3125

5/16

19.08

5.61

20.1

8.02

1.89

.2500

1/4

15.62

4.59

16.9

6.78

1.92

.1875

3/16

11.97

3.52

13.4

5.36

1.95

4×4

.5000

1/2

21.63

6.36

12.3

6.13

1.39

.3750

3/8

17.27

5.08

10.7

5.35

1.45

.3125

5/16

14.83

4.36

9.58

4.79

1.48

.2500

1/4

12.21

3.59

8.22

4.11

1.51

.1875

3/16

9.42

2.77

6.59

3.30

1.54

3.5×3.5

.3125

5/16

12.70

3.73

6.09

3.48

1.28

.2500

1/4

10.51

3.09

5.29

3.02

1.31

.1875

3/16

8.15

2.39

4.29

2.45

1.34

3×3

.3125

5/16

10.58

3.11

3.58

2.39

1.07

.2500

1/4

8.81

2.59

3.16

2.10

1.10

.1875

3/16

6.87

2.02

2.60

1.73

1.13

2.5×2.5

.2500

1/4

7.11

2.09

1.69

1.35

.899

.1875

3/16

5.59

1.64

1.42

1.14

.930

2×2

.2500

1/4

5.41

1.59

.766

.766

.694

.1875

3/16

4.32

1.27

.668

.668

.726