The end supports can allow the extended barrier member to move in {HEAD ~ a direction} transverse to {TAIL ~ the width} of the barrier member when desired 
transverse to
The end supports can allow the extended barrier member to move in { HEAD ~ a direction } transverse to { TAIL ~ the width } of the barrier member when desired
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH