Chance Technical Design Manual

DRAWINGS & RATINGS

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

SHAFT SIZE, OD

2.875 in

73 mm

2.862 in

72.7 mm

CORRODED

SHAFT SIZE, ID*

2.36 in

60 mm

2.375 in

60.3 mm

CORRODED

1.83 in 4

76.2 cm 4

MOMENT OF INERTIA (I)*

1.733 in 4

72.1 cm 4

CORRODED

2.11 in 2

13.6 cm 2

SHAFT AREA (A)*

2.0 in 2

12.9 cm 2

CORRODED

3

20.8 cm 3

SECTION MODULUS (S x-x )*

1.27 in

1.21 in 3

19.8 cm 3

CORRODED

PERIMETER

9.0 in

22.8 cm

8.99 in

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 mini mum 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

LRFD DESIGN

TENSION STRENGTH

100 kip

445 kN 75 kip 334 kN

ALLOWABLE TENSION STRENGTH

50 kip

222 kN

ASSEMBLY OF RS2875.276 HCP FIGURE 7-24

TORQUE-CORRELATED CAPACITY CAPACITY LIMIT BASED ON TORQUE CORRELATION, TENSION / COMPRESSION 94.5 kip

ULTIMATE

ALLOWABLE

420 kN 47.25 kip

210 kN

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

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