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1.1 This specification covers ASTM Specification A 416 low-relaxation Grade 250 and Grade 270 seven-wire prestressing steel strand with protective fusion-bonded epoxy coating applied by the electrostatic deposition method or other method that will meet the coating requirements in Section 8, and, except as allowed by 1.2, with the interstices of the seven wires filled with epoxy to minimize migration of corrosive media, either by capillary action or other hydrostatic forces.
Note 1—The manufacturer as identified throughout this specification is the coating applicator.
1.2 Upon special request by the purchaser, the interstices are left unfilled.
Note 2—Unfilled strand can corrode from the inside and its application for prestressing tendons in concrete or for rock and soil anchors is not recommended.
1.3 This specification is applicable for orders in either inch-pound units (as Specification A 882) or SI units [as Specification A 882M].
1.4 The values stated in either inch-pound or SI units are to be regarded as standard. Within the test, the SI units are shown in brackets. The values stated in each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A416/A416M Specification for Steel Strand, Uncoated Seven-Wire for Prestressed Concrete
B117 Practice for Operating Salt Spray (Fog) Apparatus
D968 Test Methods for Abrasion Resistance of Organic Coatings by Falling Abrasive
G12 Test Method for Nondestructive Measurement of Film Thickness of Pipeline Coatings on Steel
G14 Test Method for Impact Resistance of Pipeline Coatings (Falling Weight Test)
G20 Test Method for Chemical Resistance of Pipeline Coatings
Federal Highway Administration ReportFHWA-RD-74-18 Nonmetallic Coatings for Concrete Reinforcing Bars (February 1974) Available from National Technical Information Service (NTIS), 5285 Port Royal Rd., Springfield, VA 22161, http://www.ntis.gov.
ICS Number Code 77.140.65 (Steel wire, wir ropes and link chains)