[Code of Federal Regulations] [Title 49, Volume 2] [Revised as of October 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR178.245-2] [Page 841] TITLE 49--TRANSPORTATION CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 178--SPECIFICATIONS FOR PACKAGINGS--Table of Contents Subpart H--Specifications for Portable Tanks Sec. 178.245-2 Material. (a) All material used for the construction of the tank and appurtenances shall be suitable for use with the commodity to be transported therein. (b) A material of thickness less than \3/16\ inch shall not be used for the shells and heads.