The containers 12 may be, for example, {TAIL ~ 6×4×1.75 inch volumes} of 1/8 inch formed aluminum sheets separated to 5.5 inches by {HEAD ~ aluminum beams} 14a and 14b, themselves separated by 3 inches 
The containers 12 may be , for example , { TAIL ~ 6×4×1.75 inch volumes } of 1/8 inch formed aluminum sheets separated to 5.5 inches by { HEAD ~ aluminum beams } 14a and 14b , themselves separated by 3 inches
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH