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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 725Do not use precast concrete units when:` Representative cylinders do not meet the strength requirement by 28days.` Cracks, honeycombed, or patched areas are larger than 30 square inches.Furnish precast reinforced concrete manhole risers and tops conforming toAASHTO M 199.725.12 Frames, Grates, Covers, and Ladder Rungs. Fabricate metal gratesand covers to evenly bear on the frames. Correct bearing inaccuracies bymachining. Assemble all units before shipment. Mark all pieces to facilitatereassembly at the installation site. Uniformly coat all castings with asphaltvarnish or with a commercial preservative according to the manufacturer'sstandard practice. Conform to the following:(a) Gray iron castings AASHTO M 105(b) Carbon steel castings AASHTO M 103(c) Structural steel AASHTO M 183(d) Galvanizing AASHTO M 111(e) Malleable iron castingsASTM A 47M(f) Aluminum alloy ladder rung material ASTM B 221M alloy 6061-T6(g) Aluminum castingsASTM B 26M alloy 356.0-T6(h) Asphalt varnishFSS TT-V-51725.13 Corrugated Metal Units. For steel corrugated units, conform toAASHTO M 36. For aluminum corrugated units, conform to AASHTO M1<strong>96</strong>. For coatings, conform to the following:(a) Asphalt-coated corrugated units AASHTO M 190 type A(b) Polymer precoated corrugated units AASHTO M 245grade 250/250(c) Fiber-bonded units Subsection 707.09725.14 Protective Coatings for Concrete. Furnish protective coatings forbridge decks, curbs, sidewalks, and concrete portions of bridge railings conformingto one of the following:(a) Boiled linseed oilASTM D 260 type I or II(b) Petroleum spirits (mineral spirits) ASTM D 235780

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