{"data":{"id":"us/49-cfr-179.220-3","jurisdiction":"us","citation":"49 CFR 179.220-3","heading":"-3 Type.","body":"(a) Tanks built under these specifications must consist of an inner container, a support system for the inner container, and an outer shell.\n(b) The inner container must be a fusion welded tank of circular cross section with formed heads designed convex outward and must have a manway on top of the tank as prescribed herein. When the inner container is divided into compartments, each compartment must be considered a separate container.\n(c) The outer shell must be a fusion welded tank with formed heads designed convex outward.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS","PART 179—SPECIFICATIONS FOR TANK CARS","Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"4d47e241b3735626eacfc7b7710631d59591c9e226b1f2825a21e330fe9dcd8f","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-179.220-1","next":"us/49-cfr-179.220-4"},"notice":"GroundRules: Original legal text. Not legal advice."}