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