Number and nature of tests
59.—(1)  One tensile test shall be made from each 15 or part of 15, bars rolled of each section or diameter from the same charge, but not less than two tensile tests shall be made, unless the total number of bars rolled from the same charge is 8, or less than 8, and the bars are of the same section or diameter, when one test will suffice. For round bars 1¾ inches in diameter, and under, the numbers 50 and 20 shall be substituted for 15 and 8 respectively for determining the number of tests required.
(2)  A cold bending test shall be made from stay bars in the same proportion as that in which tensile tests are required; and a cold bending test shall be made from each angle or tee bar rolled. No bending tests need be made from rivet bars.