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