In state of the art tower design, it has been {HEAD ~ the practice} to mount {TAIL ~ such ladder or cable tray segments} to supporting members such as structural I beams or the like, which are themselves supported by the tower walls 
to mount
In state of the art tower design , it has been { HEAD ~ the practice } to mount { TAIL ~ such ladder or cable tray segments } to supporting members such as structural I beams or the like , which are themselves supported by the tower walls
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH