Standard Specification for
Uncoated High-Strength Steel
Bars for Prestressing Concrete
AASHTO Designation: M 275M/M 275-08
ASTM Designation: A 722/A 722M-07
1.1.This specification covers uncoated high-strength steel bars intended for use in pretensioned and post-tensioned prestressed concrete construction or in prestressed ground anchors. Bars are of a minimum ultimate tensile strength level of 1035 MPa [150000 psi).
1.2.Two types of bars are provided: Type I bar has a plain surface and Type II bar has surface deformations.
1.3.Supplementary requirements of an optional nature are provided. They shall apply only when specified by the purchaser.
1.4.This specification is applicable for orders in either SI units (M 275M) or in inch-pound units
(M 275). SI units and inch-pound units are not necessarily equivalent. Inch-pound units are shown
in brackets in the text for clarity, but they are the applicable values when the material is ordered to M 275.
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Click here to download AASHTO Designation: M 274-87 (2004) pdf free download