TM 55-07/NAVSEA OP 3221 Rev 2
must be joined with crossmembers. When the length of a leg does not exceed 6 feet, a single crossmember may be
used and secured equidistant from either end of the joined legs. Legs that are greater than 6 feet in length will be joined
by two crossmembers secured at points one-quarter of the length of the leg from either end. The frames are fastened to
double 1by 6-inch or single 2by 6inch lumber strips placed over the cargo. Adjacent A-frames may be unitized by means
of 2by 6or 2by 3-inch horizontal lacers.
Figure 731 Construction details for overhead A-frame tomming.