{HEAD ~ an overhead support assembly} secured to {TAIL ~ the upright member} and extending from a front thereof 
secured to
{ HEAD ~ an overhead support assembly } secured to { TAIL ~ the upright member } and extending from a front thereof
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH