TM 55-607/NAVSEA OP 3221 Rev 2
Figure 8-24. One-point technique of unit-load positioning (sweatboard blocking technique).
e. When the stowage of the unit loads in the lower tier is complete, all voids in that tier must be considered for
dunnaging. Voids in lower tiers that exceed one-third the length of the unit that overstows the void shall be dunnaged.
Smaller voids need not be dunnaged, since the overstowed unit load will be adequately supported by the unit loads
below, and athwartship movement by the loads in the lower tiers will be restricted by the weight of the overstowed unit
loads and blocked by effective dunnaging at the sweatboards. The exception is the top tier, where all voids must be
dunnaged, regardless of size. Additional shoring at the strip sheathing is required for the top tier because overstow
weight, which restrains lateral movement of unit loads in the tiers below, is nonexistent here. Shoring at the top tier will