StacksVerified U.S. regulatory reference

49 CFR §179.202-5

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The DOT-117 specification tank car must have a tank head puncture resistance system in conformance with § 179.16(c). The full height head shields must have a minimum thickness of 1/2 inch.