Transmission And Substation Foundations - Technical Design Manual

SECTION 6: PRODUCT DRAWINGS AND RATINGS Type RS2875.276 HCP Helical Piles

RS2875.276 HCP Helical Pile and Anchor Product Specifications

Hot-rolled HSS 2.875 inch, 0.276 inch nominal wall with 80 ksi minimum yield strength

Shaft

Corroded 2.862 in Corroded 2.375 in Corroded 1.733 in 4 Corroded 2.0 in 2 Corroded 1.21 in 3 Corroded 8.99 in

Shaft Size, Od 2.875 in 73 mm

72.7 mm

Shaft Size, Id*

2.36 in 60 mm

60.3 mm

Moment Of Inertia (I)

76.2 cm 4

1.83 in 4

72.1 cm 4

Shaft Area (A)

2.11 in 2

13.6 cm 2

12.9 cm 2

Section Modulus (S x-x )

1.27 in 3

20.8 cm 3

19.8 cm 3

Perimeter

9.0 in 22.8 cm

22.8 cm

Welded Sleeve

Coupling

Welded round deep socket

Two 3/4 inch diameter SAE J429 Grade 5 hex head bolts with threads excluded from shear planes 0.375-inch thick, formed on matching metal dies, ASTM A656 Grade 80 or better Hot dip galvanized per ASTM A123 Grade 75, 3.0 mil minimum thickness or bare steel

Coupling Bolts

Helix Plates

Coatings

Torque Properties Torque Correlation Factor

9 ft- 1

30 m- 1

Torque Rating 10,500 ft∙lb

14,236 N∙m

Structural Capacity

Nominal LFRD Design 100 kip 445 kN 75 kip 334 kN

Assembly of RS2875.276 HCP Figure 6-23

Tension Strength

Allowable Tension Strength

50 kip

222 kN

Torque-Correlated Capacity Capacity Limit Based Ultimate

Allowable

On Torque Correlation, Tension / Compression

94.5 kip 420 kN 47.25 kip 210 kN

Note: * Computed with 93% of wall thickness per AISC 360-10, B4.2

6-40 | www.hubbell.com/hubbellpowersystems