Each of the horizontal plates has {HEAD ~ a first stop} extending from {TAIL ~ one end} thereof and being connected to the first side of the longitudinal plate 
Each of the horizontal plates has { HEAD ~ a first stop } extending from { TAIL ~ one end } thereof and being connected to the first side of the longitudinal plate
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH