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