100. Properties Of Angles For Struts

Even Legs

Even Legs.

Size in inches.

Weight per yard.

Radii of Gyration.

Distance, d from Base to Neutral Axis.

Axis A B.

Axis CD.

6 X 6 X 7/16

50.6

I.87

1.19

1.66

6X6X1

110.0

I.80

1.17

1.86

5 X 5 X 7/16

41.8

1.55

1.00

1.41

5X5X1

90.0

1.48

.98

1.61

4 X 4 X 3/8

28.6

1.24

.81

1.14

4 X4 X 3/4

54.4

1.19

.80

1.27

3i X 3i X 3/8

24.8

1.07

.70

1.01

3i X 3i x 5/8

39.8

1.04

.69

1.10

3 X 3 X 1/4

144

•93

.60

.84

3 X 3 X 5/8

33-6

.88

•59

.98

2 3/4 X 2 3/4 X 1/4

13.1

.85

•55

.78

2 3/4 X 2 3/4 X 1/2

25.0

.82

•54

.87

2 1/2 X 2 1/2 X 1/4

11.9

.77

.50

.72

2 1/2 X 2 1/2 X 1/2

22.5

•74

•49

.81

2 1/4 X 2 1/4 X 1/4

10.6

.69

•45

.65

2 1/4 X 2 1/4 X 7/16

17.8

.67

•44

• 72

2 X 2 X 3/16

7.1

.62

.40

•57

2X2X3/8

13.6

.61

•39

.64

1 3/4 X 1 3/4 X 3/16

6.2

•53

.36

.51

1 3/4 X 1 3/4 X 3/8

11.7

•51

•35

•57

1 1/2 x 1 1/2 x 3/16

5.3

.46

•31

•44

1 1/2 X 1 1/2 X 3/8

9.8

.44

.31

51

1 1/4 X 1 1/4 X 1/8

3.0

.41

.26

.36

1 1/4 X 1 1/4 X 1/4

5.6

.38

.26

.40

1 X 1 X 1/8

23

.29

.20

.30

1 X 1 X 1/4

4.4

.29

.20

•35

When struts of any section are hinged in order to utilize the maximum efficiency of the strut, it is of the utmost importance to keep the centre of the pin with the centre of gravity of the strut.

In the tables of channels, angles and tees this is defined by the distance a and l from base to neutral axes.

Uneven Legs

Uneven Legs.

Size in inches.

Weight per yard.

Radii op Gyration.

Distance from Base to Neutral Axes.

Axis A B.

Axis CD.

Axis EF.

d.

/.

6 X 4 X 7/16

41.8

I.92

1.16

.92

I.96

.96

6X4X1

90.0

I.85

I.09

.91

2.17

1.17

5X4X3/8

32.3

1.59

I.20

•87

1.53

1.03

5X4X1

80.0

1.51

1.13

.86

1.75

1.25

5 X 3 1/2 X 3/8

30.5

I.60

I.03

.80

1.61

.86

5 X 3 1/2 X 3/4

58.I

1.55

.98

•79

1.75

1.00

5X3X3/8

28.6

1.61

.85

.70

1.70

.70

5 X 3 X 5/4

544

1.55

.80

.69

1.84

.84

4 1/2 X 3 X3/8

26,7

1.44

.86

.69

1.49

•74

4 1/2 X 3 X 5/8

43.0

1.40

.83

.68

1.58

.83

4 X 3 1/2 X 3/8

26.7

1.25

1.06

•74

1.20

•95

4 X 3 1/2 X 5/8

43.0

1.22

1.03

•73

1.29

1.04

4X3X3/8

24.8

1.26

.88

.67

1.28

.78

4X3X5/8

39.8

1.23

.85

.65

1.37

.87

3 1/2 X 3 X 11/32

21.2

1.09

.90

.64

1.07

.82

3 1/2 X 3 X5/8

36.7

1.06

.87

.64

1.17

.92

3 X2 1/2X5/16

16.2

.94

• 74

•54

•93

.68

3 X 2 1/2 X 1/2

25.0

.91

.72

•54

1.00

•75

3 X 2 X 1/4

11.9

.96

.58

.46

•99

• 49

3 X 2 X 1/2

22.5

.92

•55

.46

1.08

•58

3 1/2 X 2 1/2 x 5/16

17.8

1.11

•73

.56

1.14

.64

3 1/2 X 2 1/2 X 1/2

27.5

1.08

.70

.56

1.20

.70

6 X 3 1/2 X 7/16

39.6

1.93

.98

.82

2.06

.81

6 X 3 1/2 X 1

85.0

1.86

.92

.81

2.26

1.01

6 1/2 X 4 X 7/16

44.0

2.09

1.14

.94

2.18

•93

6 1/2X 4 XI

95.0

2.02

1.08

•93

2.38

I.I3

5 1/2 X 3 1/2 X 3/8

32.3

1.77

1.05

.81

1.82

.82

5 1/2 X 3 1/2 X 5/8

52.3

1.73

•97

.80

1.91

.91

7 X31/2X5/8

61.7

2.21

.92

.85

2.57

.82

7 X 3 1/2 X 1

95.0

2.19

.88

.84

2.71

.96

2 1/2 X 2 X 1/4

10.6

.81

•59

•43

.78

•54

2 1/2 X 2 X 1/2

20.0

•74

.56

•43

.87

.62

2 1/4 x 1 1/2 x 3/16

6.7

.71

•43

•34

.76

•38

2 1/4 X 1 1/2 X 3/8

12.6

•63

.40

•34

.82

•44

2 x 1 1/4 x 3/16

5.7

.63

•35

•31

.68

•31

2 X 1 1/4 X 3/8

9.2

•59

•33

.29

.70

•32

Articles 100 and 101 embrace all the angles and tees in common use.

101. Properties Of Tees For Struts

Even Legs.

Even Legs.

Size in inches.

Weight per yard.

Radii of Gyration.

Distance, d, from Base to Neutral Axis.

Axis AB.

Axis CD.

4 X 4 X 1/2

36.5

I.20

.84

1.14

3 1/2 X 3 1/2 X 15/32

31

I.06

•74

I.00

3 X3 X 15/32

26

.90

.62

.90

2 1/2 X 2 1/2 X 7/16

19.5

.78

•55

•75

2 1/2 X 2 1/2 X 3/8

17.52

.75

•53

•75

2 1/4 X 2 1/4 X 1/4

11.75

.65

.50

.61

2 1/4 X 2 1/4 x 9/32

12

.67

•47

.65

Size in inches.

Weight per yard.

Radii of Gyration.

Distance, d, from Base to Neutral Axis.

Axis AB.

Axis CD.

2 X 2 X 9/32

10.5

.60

•43

.60

1 3/4 X 1 3/4 X 7/32

7.1

•54

•37

.50

1 1/2 x 1 1/2 x 7/32

6

.46

•32

• 45

1 1/4 x 1 1/4 x 3/16

45

•37

.27

•37

1 x1 x 3/16

3.0

.30

.26

•30

3 x 3 x 11/32

19.3

.91

.62

.84

3 x 3 x 13/32

22.6

.90

.63

.86

Uneven Legs.

Uneven Legs.

Size in inches.

Weight per yard.

Radii of Gyration.

Distance, d, from Base to Neutral Axis.

Axis

AB.

Axis CD.

4 1/2 X 3 1/2

44.5

I.09

.91

1.16

4 X 3 1/2

41.8

I.05

.88

I.09

5 X 2 1/2

30.7

.72

1.14

.67

5 X 2 1/2

33.0

.70

1.17

.64

4X3

25.9

.86

.92

•77

4X3

25.25

.91

.82

.84

4X2

20.4

.58

.91

•54

3 X 3 1/2

28.25

1.05

.61

1.10

3 X 2 1/2

23.8

.76

.63

.82

3X1 1/2

11.2

.41

•71

•37

2 1/2 X 1 1/4

9.1

•33

.60

•32

Size in inches.

Weight per yard.

Radii of Gyration.

Distance, d, from Base to Neutral Axis.

Axis AB.

Axis CD.

2 X I 1/2

8.75

•43

•45

•43

2 X I

7

.26

•49

• 27

2 x 9/16

5.88

.13

•54

.17

2 3/4 X 1 3/4

18.75

•55

.58

.66

2 3/4 X 2

21

.63

•55

•75

5X3 1/2

48.44

1.05

1.04

1.05

5 X4

44.I

1.19

1.09

1.08

2 1/4x 9/16

6.5

.12

.61

.18

4X4 1/2

38.5

1.37

.84

1.32

3X2 1/2

17.6

•73

.65

.69

3X2 1/2

20.6

.72

.66

.70