49 C.F.R. § 179.200-19 Reinforcements, when used, and appurtenances not otherwise specified.
Title 49 - Transportation
(a) All attachments to tank and dome shall be applied by approved means. Rivets if used shall be caulked inside and outside. (b) Reinforcing pads must be used between external brackets and shells if the attachment welds exceed 6 lineal inches of [29 FR 18995, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 179–10, 36 FR 21351, Nov. 6, 1971]
Title 49: Transportation
PART 179—SPECIFICATIONS FOR TANK CARS
Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW and 115AW)
§ 179.200-19 Reinforcements, when used, and appurtenances not otherwise specified.