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General Order 64-A


Section IV


Strength Requirements For All Classes Of Lines


48.2    Structural Steel


Structural steel shall be in accordance with the specifications of the American Society for testing materials.  The specifications provide for the following minimum ultimate strengths:



55,000 pounds per square inch


55,000 pounds per square inch

minus 180


46,000 pounds per square inch


Special high strength steel may be used provided it conforms to the above specifications in all respects except as to yield point and ultimate strength.