Stowage and segregation requirements.

  1. Law
  2. CFR 46
  3. Shipping
  4. Coast Guard, Department of Homeland Security
  5. Dangerous Cargoes
  6. Carriage of Bulk Solid Materials That Require Special Handling
  7. Stowage and Segregation
  8. Stowage and segregation requirements.

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§ 148.120 Stowage and segregation requirements.

(a) Each material listed in Table 148.10 of this part must be segregated from incompatible materials in accordance with -

(1) The requirements of Tables 148.120A and 148.120B of this section that pertain to the primary or subsidiary hazard class to which the materials belong. Whenever a subsidiary hazard may exist, the most stringent segregation requirement applies; and

(2) Any specific requirements in Subpart D of this part.

(b) Materials that are required to be separated during stowage must not be handled at the same time. Any residue from a material must be removed before a material required to be separated from it is loaded.

(c) Definitions and application of segregation terms:

(1) “Separated from” means located in different cargo compartments or holds when stowed under deck. If the intervening deck is resistant to fire and liquid, a vertical separation, i.e., in different cargo compartments, is acceptable as equivalent to this segregation.

(2) “Separated by a complete cargo compartment or hold from” means either a vertical or horizontal separation, for example, by a complete cargo compartment or hold. If the intervening decks are not resistant to fire and liquid, only horizontal separation is acceptable.

(3) “Separated longitudinally by an intervening complete cargo compartment or hold from” means that vertical separation alone does not meet this requirement.

Expand Table

Table 148.120A - Segregation Between Incompatible Bulk Solid Cargoes

Bulk solid materials Class 4.1 4.2 4.3 5.1 6.1 7 8 9/PDM
Flammable solid 4.1 X
Spontaneously combustible material 4.2 2 X
Dangerous when wet material 4.3 3 3 X
Oxidizer 5.1 3 3 3 X
Poisonous material 6.1 X X X 2 X
Radioactive material 7 2 2 2 2 2 X
Corrosive material 8 2 2 2 2 X X X
Miscellaneous hazardous material and potential dangerous material 9/PDM X X X X X 2 X X

Numbers and symbols indicate the following terms as defined in § 148.3 of this part:

2 - “Separated from”.

3 - “Separated by a complete hold or compartment from”.

X - No segregation required, except as specified in an applicable section of this subpart or Subpart E of this part.

Expand Table

Table 148.120B - Segregation Between Bulk Solid Cargoes and Incompatible Packaged Cargoes

Packaged hazardous material Bulk solid material
Class 4.1 4.2 4.3 5.1 6.1 7 8 9/PDM
Explosives 1.1
1.2
1.5		 4 4 4 4 2 2 4 X
Explosives 1.3
1.6		 3 3 4 4 2 2 2 X
Explosives 1.4 2 2 2 2 X 2 2 X
Flammable gas 2.1 2 2 1 2 X 2 2 X
Non-flammable compressed gas 2.2 2 2 X X X 2 1 X
Poisonous gas 2.3 2 2 X X X 2 1 X
Flammable liquid 3 2 2 2 2 X 2 1 X
Flammable solid 4.1 X 1 X 1 X 2 1 X
Spontaneously combustible material 4.2 1 X 1 2 1 2 1 X
Dangerous when wet material 4.3 X 1 X 2 X 2 1 X
Oxidizer 5.1 1 2 2 X 1 1 2 X
Organic peroxide 5.2 2 2 2 2 1 2 2 X
Poisonous material 6.1 X 1 X 1 X X X X
Infectious substance 6.2 3 3 2 3 1 3 3 X
Radioactive material 7 2 2 2 1 X X 2 X
Corrosive material 8 1 1 1 2 X 2 X X
Miscellaneous hazardous material 9 X X X X X X X X

Numbers and symbols indicate the following terms as defined in § 148.3 of this part:

1 - “Away from”.

2 - “Separated from”.

3 - “Separated by a complete hold or compartment from”.

4 - “Separated longitudinally by an intervening complete compartment or hold from”.

X - No segregation required, except as specified in an applicable section of this subpart or Subpart E of this part.


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