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FP-96 English Version - Eastern Federal Lands Highway Division

FP-96 English Version - Eastern Federal Lands Highway Division

FP-96 English Version - Eastern Federal Lands Highway Division

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Section 715715.04 Steel Shells. Furnish either cylindrical or tapered pile shells of spiralwelded, straight-seam welded, or seamless tube steel material. Use only onetype of pile shell throughout a structure. Conform to the following minimumshell wall thicknesses:• Outside cylinder diameter < 14 inches• Outside cylinder diameter A 14 inches• Tapered or fluted0.250 inch0.375 inch0.179 inch(a) Shells driven without a mandrel. For tapered or step tapered castin-placeconcrete piles, furnish shells having a minimum 12-inch diameter atcutoff and a minimum 8-inch diameter tip. For constant diameter cast-inplaceconcrete piles, furnish shells having a minimum nominal diameter of10.75 inches.Fabricate shells from not less than 0.179-inch plate stock conforming toAASHTO M 183. Shells may be either spirally welded or longitudinallywelded and may be either tapered or constant in section. Seal the tips asnoted on the drawings.(b) Shells driven with a mandrel. Furnish shells of sufficient strength andthickness to withstand driving without injury and to resist harmful distortionand/or buckling due to soil pressure after being driven and the mandrel removed.Butt and tip dimensions are specified in the contract.715.05 Steel Pipes. Conform to the following:(a) Steel pipe to be filled with concrete ASTM A 252 grade 2(b) Closure plates for closed end piles AASHTO M 183(c) Reinforced conical points AASHTO M 103for pipe closure at the tip(d) Unfilled tubular steel piles for welded and ASTM A 252 grade 2seamless steel pipe piles with chemical propertiesconforming to ASTM A 53 grade B715.06 Steel H-Piles. Furnish steel H-piles from rolled steel sections of themass and shape specified in the contract. Fabricate the H-piles from structuralsteel conforming to AASHTO M 183, except do not use steel manufactured bythe acid-bessemer process.740

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