{HEAD ~ first and second flange members} disposed along the full length of opposing edges of said plate member, wherein the first flange member is disposed away from the upper surface of said plate in a direction opposite to the direction of {TAIL ~ said second flange member} 
{ HEAD ~ first and second flange members } disposed along the full length of opposing edges of said plate member , wherein the first flange member is disposed away from the upper surface of said plate in a direction opposite to the direction of { TAIL ~ said second flange member }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL