[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR175.78]

[Page 734-735]
 
                        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 a dangerous interaction in the event of leakage.
    (b) At 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
5.1.............................   Note 2   ........        X         X   ........  ........  ........  ........
5.2.............................   Note 2   ........  ........  ........  ........  ........  ........  ........
8...............................   Note 2   ........  ........  ........        X   ........  ........  ........
----------------------------------------------------------------------------------------------------------------

    (c) Instructions for using the Segregation Table are as follows:
    (1) Hazard labels, classes or divisions not shown in the table are 
not subject to segregation requirements.
    (2) Dots at the intersection of a row and column indicate that no 
restrictions apply.
    (3) 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.
    (4) Note 1. ``Note 1'' at the intersection of a row and column means 
the following:
    (i) Only Division 1.4, Compatibility Group S, explosives are 
permitted to be transported aboard a passenger aircraft. Only certain 
Division 1.3, Compatibility Groups C and G, and Division 1.4, 
Compatibility Groups B, C, D, E, G and S, explosives may be transported 
aboard a cargo aircraft.

[[Page 735]]

    (ii) Division 1.4 explosives in Compatibility Group S may be stowed 
with Division 1.3 and 1.4 explosives in compatibility groups as 
permitted aboard aircraft under paragraph (c)(4)(i) above.
    (iii) Except as otherwise provided in this Note, explosives of 
different compatibility groups may be stowed together whether or not 
they belong to the same division.
    (iv) Division 1.4B and Division 1.3 explosives may not be stowed 
together. Division 1.4B explosives must be loaded into separate unit 
load devices and, when stowed aboard the aircraft, the unit load devices 
must be separated by other cargo with a minimum separation of 2 m (6.5 
feet). When not loaded in unit load devices, Division 1.4B and Division 
1.3 explosives must be loaded into different, non-adjacent loading 
positions and separated by other cargo with a minimum separation of 2 m 
(6.5 feet).
    (5) 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.
    (6) 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.
    (7) 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.

[71 FR 14604, Mar. 22, 2006, as amended at 71 FR 54396, Sept. 14, 2006; 
71 FR 78634, Dec. 29, 2006]