TM 55-607/NAVSEA OP 3221 Rev 2
Figure 6-9. Basic bracing for metal deck.
c. Shoring and Tomming. Shoring, which includes blocking and bracing, is the process of securing cargo to prevent
lateral movement by supporting cargo from the side, or to prevent downward movement by supporting cargo from below.
Tomming is the securement of cargo to prevent upward movement. The cargo is secured by running lumber from an
overhead ship's structure down to the cargo either vertically or at an angle.
6-4. Preload Securing
After the hold and cleaning have been inspected, as required for the loading of explosives cargo (figs 6-10 and 6-11),
prestow preparation and loading are begun. Considering the stowage requirements of the type of cargo being loaded,
pertinent structures such as heat or nonheat bulkheads, magazines, encasements, flooring, or sheathing are installed.
Construction details for fundamental securing structures are specified in chapter 7.