{TAIL ~ A plurality} of {HEAD ~ rigid cross beams} connect the anchor ends, with the cross beams and the anchor ends all substantially coplanar 
{ TAIL ~ A plurality } of { HEAD ~ rigid cross beams } connect the anchor ends , with the cross beams and the anchor ends all substantially coplanar
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH