{HEAD ~ A roof perimeter cable guard system} has {TAIL ~ a main stanchion member} supported at its lower end by an anchor bracket screwed to the roof perimeter 
has
{ HEAD ~ A roof perimeter cable guard system } has { TAIL ~ a main stanchion member } supported at its lower end by an anchor bracket screwed to the roof perimeter
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH