The Specifications for Round Shaft Helical Piers

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