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尺  寸

特  性**

公稱*尺寸

壁厚

每英尺重量

截面積

X-X軸

Y-Y軸

Ix

Sx

rx

Iy

Sy

ry

ln.

ln.

Lb.

ln.2

ln.4

ln.3

ln.

ln.4

ln.3

ln.

8×3

.3750

3/8

24.93

7.33

51.0

12.7

2.64

10.4

6.92

1.19

.3125

5/16

21.21

6.23

44.7

11.2

2.68

9.25

6.16

1.22

.2500

1/4

17.32

5.09

37.6

9.40

2.72

7.90

5.26

1.25

.1875

3/16

13.25

3.89

29.6

7.40

2.76

6.31

4.21

1.27

8×2

.3750

3/8

22.37

6.58

40.1

10.0

2.47

3.85

3.85

.765

.3125

5/16

19.08

5.61

35.5

8.87

2.51

3.52

3.52

.792

.2500

1/4

15.62

4.59

30.1

7.52

2.56

3.08

3.08

.819

.1875

3/16

11.97

3.52

23.9

5.97

2.60

2.52

2.52

.847

7×5

.5000

1/2

35.24

10.4

63.5

18.1

2.48

37.2

14.9

1.90

.3750

3/8

27.48

8.08

52.2

14.9

2.54

30.8

12.3

1.95

.3125

5/16

23.34

6.86

45.5

13.0

2.58

26.9

10.8

1.98

.2500

1/4

19.02

5.59

38.0

10.9

2.61

22.6

9.04

2.01

.1875

3/16

14.53

4.27

29.8

8.50

2.64

17.7

7.10

2.04

7×4

.3750

3/8

24.93

7.33

44.0

12.6

2.45

18.1

9.06

1.57

.3125

5/16

21.21

6.23

38.5

11.0

2.49

16.0

7.98

1.60

.2500

1/4

17.32

5.09

32.3

9.23

2.52

13.5

6.75

1.63

.1875

3/16

13.25

3.89

25.4

7.26

2.55

10.7

5.34

1.66

7×3

.3750

3/8

22.37

6.58

35.7

10.2

2.33

9.08

6.05

1.18

.3125

5/16

19.08

5.61

31.5

9.00

2.37

8.11

5.41

1.20

.2500

1/4

15.62

4.59

26.6

7.61

2.41

6.95

4.63

1.23

.1875

3/16

11.97

3.52

21.1

6.02

2.45

5.57

3.71

1.26

6×4

.5000

1/2

28.43

8.36

35.3

11.8

2.06

18.4

9.21

1.48

.3750

3/8

22.37

6.58

29.7

9.90

2.13

15.6

7.82

1.54

.3125

5/16

19.08

5.61

26.2

8.72

2.16

13.8

6.92

1.57

.2500

1/4

15.62

4.59

22.1

7.36

2.19

11.7

5.87

1.60

.1875

3/16

11.97

3.52

17.4

5.81

2.23

9.32

4.66

1.63