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