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Standard Specification for Carbon Steel Girder Rails of Plain, Grooved, and Guard Types
1.1 This specification covers carbon steel girder rails of three classes based on type or type and weight, and chemistry defined as follows and in Table 1:
1.1.1 Unless otherwise specified by the purchaser, girder-guard rails shall be Class A.
1.1.2 Plain and grooved-girder rails under 135 lb/yd (67.1 kg/m) in weight shall be specified by the purchaser as either Class A or Class B.
1.1.3 Plain and grooved-girder rails of 135 lb/yd in weight and heavier shall be Class C, unless otherwise specified.
1.2 The values states in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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