Round Shaft Helical Piers

Round Shaft Helical Piers

Round Shaft Piers are used in compression applications.

Helical piles have significant load bearing capacity and are used in both compression (downward) and tension (uplift) applications. In many cases, round shaft helical piers will be used in compression applications. From large commercial companies to small business contractors who look to enhance their business and increase their competitive edge. Empire piers will give you that advantage with our new technology and products for your next project.

Our Round Shaft Product Line Consists of:

2.375 x .190w 2.875 x .217w
3.50 x .254w 4.50 x .290w
4.50 x .337w 4.50 x .375w
5.50 x .361w 5.50 x .500w
6.625 x .375w 7.625 x .430w
8.625 x .438w 9.625 x .395w

 Larger Diameter Piles are available upon request.

 

Round Shaft Helical Pier Material Specification
(click for PDF)

ALL ITEMS LISTED GO THROUGH A QUALITY ASSURANCE INSPECTION.

Shaft Material:
2 7/8” OD. J-55 API 5CT Certified Pipe with 70,000 yield and 90,000 tensile with an installation torque rating of 12,500 ft. lb and ultimate load limit of 100,000 lbs. Shaft lengths of 60”, 72”, 84”, and 120” standard.

Helices:
ASTM hot rolled carbon steel 3/8", 1/2", 3/4" thick plate, ASTM A570 Structural grade 50, Helix geometry in accordance with ICC-ES AC358. Configuration 8", 10", 12", 14", 16". ASTM A123 Galvanized.

Extensions:
100% positive material contact of all mating surfaces that virtually eliminates hinging. Hole pattern is 2 (two) @ 3" on center with a hole. Size of 15/16". Bolts consists of ASE-J429 Grade 5 – 3/4" x 5".

Coupler:
Couplers are cut from 3 1/2" O.D. J-55 API 5CT Certified .254w welded in place forming consistent strength equivalencies with the shaft. The welding design and welding fabrication of steel will be in accordance with the
AWS D1.1.

 

Shaft Material:
3 1/2" OD. J-55 API 5CT Certified Pipe with 80,000 yield and 90,000 tensile with an installation torque rating of 17,500 ft. lb and ultimate load limit of 122,500 lbs. Shaft lengths of 60”, 72”, 84”, and 120” standard.

Helices:
ASTM hot rolled carbon steel 3/8", 1/2", 3/4" thick plate, ASTM A570 Structural grade 50, Helix geometry in accordance with ICC-ES AC358. Configuration 8", 10", 12", 14", 16". ASTM A123 Galvanized.

Extensions:
100% positive material contact of all mating surfaces that virtually eliminates hinging. Hole pattern is 2 (two) @ 3" on center with a hole. Size of 15/16". Bolts consists of ASE-J429 Grade 8 – 3/4" x 6".

Coupler:
Couplers are cut from 4 1/2" O.D. L-80 API 5CT Certified .375w welded in place forming consistent strength equivalencies with the shaft. The welding design and welding fabrication of steel will be in accordance with the
AWS D1.1.

Product Rating
(click for PDF)

We use (OCTG) API 5CT Certified Pipe

Helical Plate Material A-50 Grade .38 / .50 / .75

Shaft Size

Material
KSI

Compression
Load Limit

Ultimate
Tension

Torsional
Strength

Load
Capacity

1.500 - BAR

50 ksi

60,000 lbs.

70,000

5,500 ft-lb

55 Kips

1.750 - BAR

50 ksi

90,000 lbs.

100,000

10,000 ft-lb

100 Kips

2.375 OD - 0.190

75 ksi

50,000 lbs.

45,000

4,500 ft-lb

45 Kips

2.875 OD. - 0.217

75 ksi

120,000 lbs.

115,000

9,500 ft-lb

85 Kips

3.50 OD. - 0.254

75 ksi

140,000 lbs.

140,000

15,500 ft-lb

109 Kips

4.50 OD. - 0.290

75ksi

170,000 lbs.

170,000

24,000 ft-lb

144 Kips

4.50 OD.  - 0.337

55 ksi

195,000 lbs.

190,000

30,000 ft-lb

180 Kips

5.50 OD. 0.362

75ksi

280,000 lbs.

270,000

40,000 ft-lb

200 Kips

6.625 OD. 0.562

55 ksi

350,000 lbs.

340,000

52,000 ft-lb

260 Kips

8.625 OD - .322

55 ksi

490,000 lbs.

475,000

70,000 ft-lb

350 Kips

10.750 OD- 365 55 ksi 580,000 lbs. 560,000 125,000 ft-lb 500 Kips
12.750 OD-.375 55 ksi 635,000 lbs. 610,000 140,000 ft-lb 560 Kips

 

Note: These are our most common shaft sizes, but we can custom manufacture helical piles up to 12.75” diameter with a .875 wall to suit your specified material requirements and standards.


The capacities shown above for ultimate compression, tension and torsional strength values are determined by statistical analysis of laboratory testing results. A minimum factor of safety of 2.0 is recommended for determining allowable capacity from correlations with final installation. Load test are recommended when practical. Empire Piers Manufacturing USA.