188.8.131.52 Requirements for Steel, Where Used
(a) Rails, brackets, fishplates, and rail clips shall be made of open-hearth steel, or its equivalent, having a tensile strength not less than 380 MPa (55,000 psi) and having an elongation of not less than 22% in a length of 50 mm (2 in.) when measured in accordance with ASTM E8.
(b) Bolts shall conform to ASTM A307.
(c) Rivets shall conform to ASTM A502.
(d) Maximum permissible stresses and deflections shall conform to 2.23.5.