FP-96 English Version - Eastern Federal Lands Highway Division

709.03 Prestressing Steel. Fabricate from one of the following:• Stress-relieved wire strand, AASHTO M 204 type BA or WA• Stress-relieved seven-wire strand, AASHTO M 203 grade 270• High-strength steel bars, AASHTO M 275 type IISection 709Protect all prestressing steel against physical damage, rust, or corrosion at alltimes. Do not use damaged prestressing steel.Package prestressing steel to protect it from physical damage and corrosionduring shipping and storage. Place a corrosion inhibitor in the package. Usea corrosion inhibitor that will have no deleterious effect on the steel, concrete,or bond strength of steel to concrete. Immediately replace or restore damagedpackaging.Mark the shipping package with a statement that the package contains highstrengthprestressing steel and a warning to use care in handling. Identify thetype, kind, and amount of corrosion inhibitor used, including the date whenplaced, safety regulations, and instructions for use. Assign a lot number andtag, for identification purposes, to all wire, strand, anchorage assemblies, orbars shipped to the site.Submit representative samples from prestressed members fabricated off site.In the case of wire or strand, take the sample from the same master roll.(a) Pretensioning method. Furnish a sample at least 7 feet long of eachstrand size from each coil.(b) Post-tensioning method. Furnish samples of the following lengths.(1) For wires requiring a head, 17 feet.(2) For wires not requiring a head, sufficient length to make up one parallel-laycable 5 feet long consisting of the same number of wires as thecable to be furnished.(3) For strands furnished with fittings, 5 feet between near ends offittings.(4) For bars to be furnished with threaded ends and nuts, 5 feet betweenthreads at ends.705