2.15.6 Materials for Car Frames and Platform Frames
(a) Rolled and Formed Steel. ASTM A36 or ASTM A283 Grade D or CAN/CSA-G40.21.
(b) Forged Steel. ASTM A668 Class B.
(c) Cast Steel. ASTM A27 Grade 60/30.
(a) ASTM A502
(b) ASTM A307
Rivets, bolts, and rods made of steel having greater strength than specified by ASTM A307 and ASTM A502 shall be permitted to be used, and the maximum allowable stresses increased proportionally, based on the ratio of the ultimate strengths. Elongation shall conform to the requirements of the corresponding ASTM specifications.
Metals other than steel shall be permitted to be used in the construction of car frames and platforms, provided the metal used has the essential properties to meet all the requirements for the purpose in accordance with sound engineering practice and the stresses and deflections conform to 2.15.10 and 2.15.11, respectively.
(a) ASTM D245
(b) ASTM D198
(c) ANSI Voluntary Product Standard PS 1-74 or CSA 0151