Chance Technical Design Manual

DRAWINGS & RATINGS

RS4500.237 HELICAL PILE AND ANCHOR PRODUCT SPECIFICATIONS

Hot-rolled HSS 4 inch nominal Schedule 40 (0.237 inch nominal wall) per ASTM A500 Grade B/C with 50 ksi minimum yield strength

SHAFT

CORRODED

SHAFT SIZE, OD

4.5 in

114 mm

4.487 in

114 mm

CORRODED

SHAFT SIZE, ID*

4.059 in 103.4 mm

4.071 in

103.4 mm

CORRODED

6.79 in 4

282.6 cm 4

MOMENT OF INERTIA (I)*

6.415 in 4

267.9 cm 4

CORRODED

2.96 in 2

19.1 cm 2

SHAFT AREA (A)*

2.786 in 2

18.09 cm 2

CORRODED

3

49.6 cm 3

SECTION MODULUS (S x-x )*

3.02 in

2.859 in 3

47.0 cm 3

CORRODED

PERIMETER

14.1 in

35.9 cm

14.09 in

35.8 cm

COUPLING

Integral forged round deep socket sleeve

COUPLING BOLTS

Two 1 inch diameter ASTM A193 Grade B7 hex head bolts 0.5 inch thick, formed on matching metal dies, ASTM A572 Grade 80 or better Hot dip galvanized per ASTM A123 Grade 75, 3.0 mil mini mum thickness or bare steel

HELIX PLATES

COATINGS

TORQUE PROPERTIES TORQUE CORRELATION FACTOR

6 ft -1

20 m -1

TORQUE RATING

18,000 ft∙lb

31,200 N∙m

STRUCTURAL CAPACITY

NOMINAL

LRFD DESIGN

TENSION STRENGTH

120 kip

712 kN 90 kip

534 kN

ALLOWABLE TENSION STRENGTH

60 kip

356 kN

ASSEMBLY OF RS4500.237 FIGURE 7-30

TORQUE-CORRELATED CAPACITY CAPACITY LIMIT BASED ON TORQUE CORRELA TION, TENSION / COM PRESSION 108 kip

ULTIMATE

ALLOWABLE

614 kN 54 kip

307 kN

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

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