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