and rigid block and bracing devices. DOT has approved some restraint systems specifically
designed for highway transport. Those include steel strap and self-locking skid systems.
4. Flammable solids, oxidizing materials, or corrosive liquids, when transported on a motor
vehicle with other authorized lading, must be loaded in a manner that provides ready access for
shifting or removal.
B. Appendix F illustrates various blocking and bracing techniques.
C. Segregation of hazardous materials will be maintained in accordance with the segregation
and separation chart shown in Title 49 CFR, section 177.848 and reprinted in Figure 6-3.
6.29 Water Shipments
A. The loading of hazardous materials to be transported by water is regulated by provisions of
Title 49 CFR, section 176.76. Except as provided in paragraphs (b) through (f) of section
176.76, hazardous materials authorized to be transported by vessel may be carried on board a
vessel in a transport vehicle or freight container subject to the following conditions:
1. The material must be in proper condition for transportation according to the requirements
of Title 49 CFR Section 176.76.
2. All packages in the transport vehicle or freight container must be secured to prevent
movement in any direction. If the shapes of the packages and the stuffing pattern preclude
shifting of the load, vertical restraint is not required.
3. Bulkheads made of dunnage that extend to the level of the cargo must be provided unless
the packages are stowed flush with the sides or ends.
4. Dunnage must be secured to the floor when the cargo consists of dense materials or heavy
5. Each package marked with the orientation marking must be so stored.
6. Any slack spaces between packages must be filled with dunnage.
7. The weight of a container must be distributed as evenly as possible throughout, and the
maximum permissible weight must not be exceeded.
8. Adjacent levels of baggaged and baled cargo must be stored in alternate directions so that
each tier binds the tier above and below it.
9. The cargo or lading must be contained entirely within the freight container or vehicle body
without overhang or projection; however, oversized machinery such as tractors or vehicles with
batteries attached may overhang or project outside the intermodal container, provided all of the