TM 55-607/NAVSEA OP 3221 Rev 2
Figure 8-29. Full-block structure for tier voids, two-face-board construction.
b. Construction of a full-block structure begins with the assembly of the two-face-board frames that bear against
cargo in the athwartship direction. Two by six-inch face boards, cut to the width or length of the unit loads, are nailed to
two 4 by 4 inch uprights, so as to bear against the top and bottom of' the unit loads. The two frames are then wedged
against the unit loads with four kickers nailed ill place to each upright. The fourth side of the void is formed by the unit
loads in the next row of cargo. This sequence is illustrated ill figure 8-30. Smaller voids, which are too small for the
construction of a full-block structure, may be shored with random pieces of lumber, cut to fit. The use of wedges, even
nailed, is not considered an acceptable method to tighten the top layer of cargo stow.