{"data":{"id":"us/49-cfr-179.201-11","jurisdiction":"us","citation":"49 CFR 179.201-11","heading":"-11 Insulation.","body":"(a) Insulation shall be of sufficient thickness so that the thermal conductance at 60 °F. is not more than 0.075 Btu per hour, per square foot, per degree F. temperature differential.\n(b) [Reserved]","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":"3d142b5930dcdd1424932ef95811c506d72161cfbfa344841ec63c21aa2522af","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-179.201-10","next":"us/49-cfr-179.202"},"notice":"GroundRules: Original legal text. Not legal advice."}