A predetermined length of the fabric material is then positioned over {HEAD ~ the frame} to overlie the retention groove in {TAIL ~ the side members} 
A predetermined length of the fabric material is then positioned over { HEAD ~ the frame } to overlie the retention groove in { TAIL ~ the side members }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL