Chance Technical Design Manual

RS9625.395 HELICAL PILE SPECIFICATIONS & AVAILABLE CONFIGURATIONS SHAFT: HSS 9-5/8 inch OD x 0.395 inch wall steel shaft produced exclusively for Chance® products. COUPLING: Welded external sleeve forming a flush fit joint, connected with multiple structural grade bolts. HELIX - 5/8 INCH THICK: ASTM A572 Grade 50 with minimum yield strength of 50 ksi. 9.625 0.395

6 INCH HELIX PITCH: A standard established by Hubbell Pow er Systems, Inc., for larger diameter helical piles and anchors. AVAILABLE HELIX DIAMETERS: 18, 20, 22, and 24 inches. All helix plates are spaced 3 times the diameter of the preced ing (lower) helix unless otherwise specified. The standard helix plate has a straight leading edge. CONFIGURATIONS: • Single- and double-helix lead sections, 10 feet long; triple-helix lead sections, 15 feet long • Plain extensions, 10 and 20 feet long • Extensions with helix plates, 5 and 7 feet long Helical products are hot dip galvanized per ASTM A123 Grade 75 or are available black.

DRAWINGS & RATINGS

CHANCE TYPE RS9625.395 HELICAL PILE SHAFT CROSS-SECTION FIGURE 7-43

NOTE: Helical piles shall be installed to appropriate depth in suitable bearing stratum as determined by the geotechnical engineer or local jurisdictional authority. Torque-correlated capacities are based on in stalling the pile to its torque rating using consistent rate of advance and RPM. A minimum Factor of Safety of 2 is recommended for determining allowable capacity from correlations. Deflections of 0.25 to 0.50 inches are typical at allowable capacity.

RS9625.395 HELICAL PILE AND ANCHOR PRODUCT SPECIFICATIONS

Hot-rolled HSS 9-5/8-inch, 0.395 inch nominal wall with 80 ksi mini mum yield strength

SHAFT

CORRODED

SHAFT SIZE, OD

9.625 in

244.5 mm

9.612 in

244.1 mm

CORRODED

SHAFT SIZE, ID*

8.89 in

225.8 mm

8.903 in

226.1 mm

CORRODED

114.65 in 4

4772.1 cm 4

MOMENT OF INERTIA (I)*

110.47 in 4

4598.1 cm 4

CORRODED

10.69 in 2

68.9 cm 2

SHAFT AREA (A)*

10.30 in 2

66.45 cm 2

ASSEMBLY OF RS9625.395 FIGURE 7-44

CORRODED

3

390.4 cm 3

SECTION MODULUS (S x-x )*

23.8 in

22.95 in 3

376.2 cm 3

CORRODED

PERIMETER

30.2 in

76.7 cm

30.1 in

76.4 cm

COUPLING

Welded external sleeve flush fit joint

COUPLING BOLTS

Four 1-1/2 inch diameter ASTM F1554 Grade 105 threaded studs 0.625-inch thick, formed on matching metal dies, ASTM A572 Grade 50 or better Hot dip galvanized per ASTM A123 Grade 75, 3.0 mil minimum thickness or Bare Steel

HELIX PLATES

COATINGS

TORQUE PROPERTIES TORQUE CORRELATION FACTOR

3 ft -1

10 m -1

TORQUE RATING

200,000 ft∙lb

271,164 N∙m

STRUCTURAL CAPACITY TENSION STRENGTH

NOMINAL

LRFD DESIGN

600 kip

2669 kN 450 kip

2002 kN

ALLOWABLE TENSION STRENGTH

300 kip

1334.5 kN

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

ULTIMATE

ALLOWABLE

600 kip

2669 kN 300 kip

1334.5 kN

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

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