{HEAD ~ The vertical members} have exposed exterior surfaces that are preferably generally flush with the exterior surface of {TAIL ~ the fixed panes} 
{ HEAD ~ The vertical members } have exposed exterior surfaces that are preferably generally flush with the exterior surface of { TAIL ~ the fixed panes }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL