One pair of these sections has a coupling 32, with the remaining portions having cooperating ends 34 for removably engaging {HEAD ~ the fittings} 32 for linearly assembling {TAIL ~ each forward and rearward portion} 24, 28 and 26, 30 to form the longitudinal frame members 12 and 14 
for linearly assembling
One pair of these sections has a coupling 32 , with the remaining portions having cooperating ends 34 for removably engaging { HEAD ~ the fittings } 32 for linearly assembling { TAIL ~ each forward and rearward portion } 24 , 28 and 26 , 30 to form the longitudinal frame members 12 and 14
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH