[Code of Federal Regulations] [Title 49, Volume 2] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR179.200-3] [Page 1034] TITLE 49--TRANSPORTATION CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 179_SPECIFICATIONS FOR TANK CARS--Table of Contents Subpart D_Specifications for Non-Pressure Tank Car Tanks (Classes DOT- 111AW and 115AW) Sec. 179.200-3 Type. Tank built under these specifications must be circular in cross section, with formed heads designed convex outward. When specified in Sec. 179.201-1, the tank must have at least one manway or one expansion dome with manway, and such other external projections as are prescribed herein. When the tank is divided into compartments, each compartment must be treated as a separate tank. [Amdt. 179-10, 36 FR 21348, Nov. 6, 1971]