[Code of Federal Regulations] [Title 49, Volume 2] [Revised as of October 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR175.78] [Page 706-708] TITLE 49--TRANSPORTATION CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 175_CARRIAGE BY AIRCRAFT--Table of Contents Subpart B_Loading, Unloading and Handling Sec. 175.78 Stowage compatibility of cargo. (a) For stowage on an aircraft, in a cargo facility, or in any other area at an airport designated for the stowage of hazardous materials, packages containing hazardous materials which might react dangerously with one another may not be placed next to each other or in a position that would allow [[Page 707]] a dangerous interaction in the event of leakage. (b) As a minimum, the segregation instructions prescribed in the following Segregation Table must be followed to maintain acceptable segregation between packages containing hazardous materials with different hazards. The Segregation Table instructions apply whether or not the class or division is the primary or subsidiary risk. The Segregation Table follows: Segregation Table -------------------------------------------------------------------------------------------------------------------------------------------------------- Class or division Hazard label -------------------------------------------------------------------------------------------------------------- 1 2 3 4.2 4.3 5.1 5.2 8 -------------------------------------------------------------------------------------------------------------------------------------------------------- 1........................................ Note 1 Note 2 Note 2 Note 2 Note 2 Note 2 Note 2 Note 2 ------------------------------------------ 2........................................ Note 2 ............ ............ ............ ............ ............ ............ ........... ------------------------------------------ 3........................................ Note 2 ............ ............ ............ ............ X ............ ........... ------------------------------------------ 4.2...................................... Note 2 ............ ............ ............ ............ X ............ ........... ------------------------------------------ 4.3...................................... Note 2 ............ ............ ............ ............ ............ ............ X ------------------------------------------ 51....................................... Note 2 ............ X X ............ ............ ............ ........... ------------------------------------------ 5.2...................................... Note 2 ............ ............ ............ ............ ............ ............ ........... ------------------------------------------ 8........................................ Note 2 ............ ............ ............ X ............ ............ ........... ------------------------------------------ -------------------------------------------------------------------------------------------------------------------------------------------------------- (c) Instructions for using the Segregation Table are as follows: (1) The dots at the intersection of a row and column indicate that no restrictions apply. (2) The letter ``X'' at the intersection of a row and column indicates that packages containing these classes of hazardous materials may not be stowed next to or in contact with each other, or in a position which would allow interaction in the event of leakage of the contents. (3) Note 1. ``Note 1'' at the intersection of a row and column means the following: (i) For explosives in compatibility groups A through K and N-- (A) Packages bearing the same compatibility group letter and the same division number may be stowed together. (B) Explosives of the same compatibility group, but different divisions may be stowed together provided the whole shipment is treated as belonging to the division having the smaller number. However, when explosives of Division 1.5 Compatibility Group D are stowed together with explosives of Division 1.2 Compatibility Group D, the whole shipment must be treated as Division 1.1, Compatibility Group D. (C) Packages bearing different compatibility group letters may not be stowed together whether or not they belong to the same division, except as provided in paragraphs (c)(3)(ii) and (iii) of this section. (ii) Explosives in Compatibility Group L may not be stowed with explosives in other compatibility groups. They may only be stowed with the same type of explosives in Compatibility Group L. (iii) Explosives of Division 1.4, Compatibility Group S, may be stowed with explosives of all compatibility groups except for Compatibility Groups A and L. (iv) Other than explosives of Division 1.4, Compatibility Group S (see paragraph (c)(3)(iii) of this section), and Compatibility Groups C, D and E that may be stowed together, explosives that do not belong in the same compatibility group may not be stowed together. (A) Any combination of substances in Compatibility Groups C and D must be assigned to the most appropriate compatibility group shown in the Sec. 172.101 Table of this subchapter. (B) Explosives in Compatibility Group N may be stowed together with explosives in Compatibility Groups C, [[Page 708]] D or E when the combination is assigned Compatibility Group D. (4) Note 2. ``Note 2'' at the intersection of a row and column means that other than explosives of Division 1.4, Compatibility Group S, explosives may not be stowed together with that class. (5) Packages containing hazardous materials with multiple hazards in the class or divisions, which require segregation in accordance with the Segregation Table need not be segregated from other packages bearing the same UN number. (6) A package labeled ``BLASTING AGENT'' may not be stowed next to or in a position that will allow contact with a package of special fireworks or railway torpedoes. [66 FR 33437, June 21, 2001]