The Specifications for Round Shaft Helical Piles

Shaft Size(inch)

Wall Thick(inch)

Helix Thick(inch)

Lead Length(ft)

Helix Size(inch)

Extension Length(ft)

2.875 OD.

0.262

3/8 or 1/2

3ft/5ft/7ft/10ft

8/10/12/14

3ft/5ft/7ft/10ft

3.00 OD.

0.238

3/8 or 1/2

3ft/5ft/7ft/10ft

8/10/12/14

3ft/5ft/7ft/10ft

3.50 OD.

0.254/0.300

3/8 or 1/2

3ft/5ft/7ft/10ft

8/10/12/14

3ft/5ft/7ft/10ft

4.50 OD.

0.290/0.337

3/8 or 1/2

5ft/7ft/10ft/12ft

8/10/12/14

3ft/5ft/7ft/10ft

5.50 OD.

0.362

3/8 or 1/2

5ft/7ft/10ft/12ft

8/10/12/14

3ft/5ft/7ft/10ft

6.625 OD.

0.562

3/8 or 1/2

5ft/7ft/10ft/12ft

8/10/12/14

3ft/5ft/7ft/10ft

The Specifications for Square Helical Piles 

Helical Pier Type

Size inches(mm)

Torque Rating

ft-Ib(N-m)

Ultimate Capacity

kip(kn)

SS5

Square Shaft

1.50

(38.1)

5500

(7,500)

55

(245)

SS150

Square Shaft

1.50

(38.1)

7000

(9500)

70

(312)

SS175

Square Shaft

1.75

(44.5)

10000

(13,600)

100

(445)

SS200

Square Shaft

2.00

(50.8)

15000

(20,300)

150

(668)

SS225

Square Shaft

2.25

(57.2)

20000

(27,100)

200

(890)

278

Hollow Shaft

2.875

(73.0)

5500

(7,500)

60

(267)

HS

Hollow Shaft

3.50

(88.9)

11000

(14,900)

77

(343)