High Quality Deep Foundation Screw Piles Helical Piers for North American

Shaft Size

Installation Torque Factor (k)

Axial Compression Load Limit

Ultimate-Limit Tension Strength

Useable Torsional Strength

Practical Load Limit Based Torsional Strength

1-1/2” Square Bar

9 - 11

70,000 lb.

70,000 lb.

7,500 ft-lb

Load limited to the rated capacity of the attachments and the lateral soil strength against the shaft

1-3/4” Square Bar

9 - 11

100,000 lb.

100,000 lb.

11,000 ft-lb

2-1/4” Square Bar

10 - 12

200,000 lb.

200,000 lb.

23,000 ft-lb

2-7/8” Tubular – 0.203 ” Wall

8 - 9

60,000 lb.

60,000 lb.

5,500 ft-lb

44,000 lb

2-7/8” Tubular – 0.262 ” Wall

8 - 9

100,000 lb.

100,000 lb.

9,500 ft-lb

80,000 lb

3-1/2” Tubular – 0.300 ” Wall

7 - 8

115,000 lb.

120,000 lb.

13,000 ft-lb

97,000 lb

4-1/2” Tubular – 0.337 ” Wall

6 - 7

160,000 lb.

160,000 lb.

22,000 ft-lb

143,000 lb

Helix Blade

8", 10", 12" and 14" in diameter with 3/8", 1/2" thickness.

Finish

Plain, Hot Dipped Galvanized, Painted, Powder Coating are available on your request.