CFR > Title 49 - Transportation > SUBTITLE B—Other Regulations Relating to Transportation > CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (Parts 105–199) > SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS (Parts 171–181) > PART 178—SPECIFICATIONS FOR PACKAGINGS > SUBPART P—Large Packagings Standards (§178.900 to §178.940) > 178.905—Large Packaging identification codes.

178.905—Large Packaging identification codes.

Large packaging code designations consist of: two numerals specified in paragraph (a) of this section; followed by the capital letter(s) specified in paragraph (b) of this section.
(a) Large packaging code number designations are as follows: 50 for rigid Large Packagings; or 51 for flexible Large Packagings.
(b) Large Packagings code letter designations are as follows:
(1) “A” means steel (all types and surface treatments).
(2) “B” means aluminum.
(3) “C” means natural wood.
(4) “D” means plywood.
(5) “F” means reconstituted wood.
(6) “G” means fiberboard.
(7) “H” means plastic.
(8) “M” means paper, multiwall.
(9) “N” means metal (other than steel or aluminum).