The top cap member has a channel like configuration which includes outer side flanges which slidably overlap and embrace exterior sides of {HEAD ~ the panel member} to permit {TAIL ~ at least limited vertical positional adjustability} of the top cap member relative to the panel member 
to permit
The top cap member has a channel like configuration which includes outer side flanges which slidably overlap and embrace exterior sides of { HEAD ~ the panel member } to permit { TAIL ~ at least limited vertical positional adjustability } of the top cap member relative to the panel member
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH