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Table 2.1 Anchor Types
Type

Exterior Pile Shaft Diameter

Pile Wall Thickness

Available Helical Blade Diameter

Helical Blade Thickness

Pile 1 7/8 in.

48 mm / 1.875 in.

3.9 mm / .154 in.

from 228 mm / 8 in. to 431 mm / 17 in.

9.5 mm / .375 in.

Pile 2 3/8 in.

60 mm / 2.375 in.

3.9 mm / .154 in.

 from 228 mm / 9 in. to 431 mm / 17 in.

9.5 mm / .375 in.

482 mm / 19  in.

12.7 mm / .500 in.

Pile 2 7/8 in.

73 mm / 2.875 in.

6.3 mm / .250 in.

from 228 mm / 9 in. to 431 mm / 17 in.

9.5 mm / .375 in.

from 482 mm / 19 in. to 787 mm / 31 in.

12.7 mm / .500 in.

Pile 3 1/2 in.

89 mm / 3.5 in.

6.3 mm / .250 in.

from 228 mm / 9 in. to 431 mm / 17 in.

9.5 mm / .375 in.

from 482 mm / 19 in. to 787 mm / 31 in.

12.7 mm / .500 in.

Pile 4 1/2 in.

114 mm / 4.5 in.

6.3 mm / ,250 in.

from 228 mm / 9 in. to 431 mm / 17 in.

9.5 mm / .375 in.

from 482 mm / 19 in. to 787 mm / 31 in.

12.7 mm / .500 in.

Pile 5 9/16 in.

141 mm / 5.5625 in.

6.3 mm / .250 in.

from 333 mm / 13 in. to 431 mm / 17 in.

9.5 mm / .375 in.

from 482 mm / 19 in. to 787 mm / 31 in.

12.7 mm / .500 in.

Pile 5 9/16 in.

141 mm / 5.5625 in.

9.5 mm / .375 in.

from 333 mm / 13 in. to 431 mm / 17 in.

9.5 mm / .375 in.

from 482 mm / 19 in. to 787 mm / 31 in.

12.7 mm / .500 in.

Pile 6 5/8 in.

168 mm / 6.625 in.

6.3 mm / .250 in.

from 381 mm / 15 in. to 431 mm / 17 in.

9.5 mm / .375 in.

from 482 mm / 19 in. to 787 mm / 31 in.

12.7 mm / .500 in.

Pile 6 5/8 in.

168 mm / 6.625 in.

9.5 mm / .375 in.

from 381 mm / 15 in. to 431 mm / 17 in.

9.5 mm / .375 in.

from 482 mm / 19 in. to 787 mm / 31 in.

12.7 mm / .500 in.

Pile 8 5/8 in.

168 mm / 8.625 in.

6.3 mm / .250 in.

431 mm / 17 in.

9.5 mm / .375 in.

from 482 mm / 19 in. to 787 mm / 31 in.

12.7 mm / .500 in.

Pile 8 5/8 in.

168 mm / 8.625 in.

9.5 mm / .375 in.

431 mm / 17 in.

9.5 mm / .375 in.

from 482 mm / 19 in. to 787 mm / 31 in.

12.7 mm / .500 in. 

Pile 10 3/4 in.

168 mm / 10.75 in.

6.3 mm / .250 in.

431 mm / 17 in.

9.5 mm / .375 in.

from 482 mm / 19 in. to 990 mm / 39 in.

12.7 mm / .500 in.

Pile 10 3/4 in.

168 mm / 10.75 in.

9.5 mm / .375 in.

431 mm / 17 in.

9.5 mm / .375 in.

from 482 mm / 19 in. to 990 mm / 39 in.

12.7 mm / .500 in.

Pile 12 3/4 in.

168 mm / 12.75 in.

6.3 mm / .250 in.

from 533 mm / 21 in. to 990 mm / 39 in.

12.7 mm / .500 in.

Pile 12 3/4 in.

168 mm / 12.75 in.

9.5 mm / .375 in.

from 533 mm / 21 in. to 990 mm / 39 in.

12.7 mm / .500 in.

Table 3.1 Allowable Compressive and Tensile Loads for the Proposed Auger-installed Pile in Granular Soil or SiltFootnote (1)
Applied Torque

Allowable Load

Compression

Tension

N∙m

(lbf·ft)

kN

(lb)

kN

(lb)

678

500

20

4 500

12

2 700

1 017

750

23

5 175

15

3 375

1 356

1 000

27

6 075

18

4 050

1 695

1 250

30

6 750

20

4 500

2 034

1 500

33

7 425

23

5 175

2 373

1 750

37

8 325

26

5 850

2 712

2 000

40

9 000

29

6 525

3 051

2 250

44

9 900

32

7 200

3 390

2 500

47

10 575

34

7 650

3 728

2 750

51

11 475

37

8 325

4 067

3 000

54

12 150

40

9 000

4 406

3 250

57

12 825

42

9 450

4 745

3 500

61

13 725

45

10 125

5 084

3 750

64

14 400

48

10 800

5 423

4 000

68

15 300

51

11 475

5 762

4 250

71

15 975

54

12 150

6 101

4 500

74

16 650

57

12 825

6 440

4 750

78

17 550

59

13 275

6 779

5 000

81

18 225

62

13 950

7 457

5 500

88

19 800

67

15 075

8 135

6 000

95

21 375

72

16 200

Table 3.2 Allowable Compressive and Tensile Loads for the Proposed Auger-installed Pile in Cohesive SoilFootnote (1)
Applied Torque

Allowable Load

Compression

Tension

N∙m

(lbf∙ft)

kN

(lb)

kN

(lb)

1 017

750

7

1 574

3

674

1 356

1 000

10

2 248

5

1 124

1 695

1 250

13

2 922

8

1 798

2 034

1 500

16

3 597

11

2 473

2 373

1 750

20

4 496

14

3 147

2 712

2 000

23

5 171

16

3 597

3 051

2 250

26

5 845

19

4 271

3 390

2 500

29

6 519

22

4 946

3 728

2 750

33

7 419

24

5 395

4 067

3 000

36

8 093

27

6 070

4 406

3 250

39

8 767

30

6 744

4 745

3 500

42

9 442

33

7 419

5 084

3 750

45

10 116

35

7 868

5 423

4 000

49

11 015

38

8 543

5 762

4 250

52

11 690

41

9 217

6 101

4 500

55

12 364

44

9 891