This can be a construction style decision, or based on {HEAD ~ the length} of {TAIL ~ the barrier member} 12 
of
This can be a construction style decision , or based on { HEAD ~ the length } of { TAIL ~ the barrier member } 12
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH