Pipeline and Haz. Matls. Safety Admin., DOT

Section 175.78

b. Division 6.1 (unless the substance is also labeled for any hazard class or division except FLAMMABLE LIQUID)
c. Class 7 (unless the hazardous material meets the definition of another hazard class).
d. Class 9, Limited Quantity or Excepted Quantity material.
e. Articles of Identification Numbers UN0012, UN0014, or UN0055 also meeting the requirements of Section 173.63(b).
f. Articles of Identification Numbers UN3528 or UN3529.
Note 2: Aboard cargo-only aircraft, packages required to be loaded in a position that is considered to be accessible include
those loaded in a Class C cargo compartment.

[76 FR 82178, Dec. 30, 2011, as amended at 78 FR 65486, Oct. 31, 2013; 81 FR 35544, June 2, 2016;
82 FR 15892, Mar. 30, 2017]

Section 175.78 Stowage
cargo.

compatibility

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:

of

(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

SEGREGATION TABLE
Class or division
Hazard label
1
1 ............................................................................
2 ............................................................................
3 ............................................................................
4.2 .........................................................................
4.3 .........................................................................
5.1 .........................................................................
5.2 .........................................................................
8 ............................................................................

Note
Note
Note
Note
Note
Note
Note
Note

1
2
2
2
2
2
2
2

2

3

4.2

4.3

5.1

5.2

8

Note 2

Note 2

Note 2

Note 2

Note 2

Note 2

Note 2

X
X
X
X

X
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.
(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 for Division 1.4B explosives and as otherwise provided in this
Note, explosives of different compatibility groups may be stowed together
whether or not they belong to the same
division. Division 1.4B explosives must
not be stowed together with any other
explosive permitted aboard aircraft except Division 1.4S, unless segregated as
prescribed in paragraph (c)(4)(iv) of
this section ( - Note 1 - ).
(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

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