{HEAD ~ the ballast rail} comprises a planar portion, an offset portion, a lip portion and {TAIL ~ a beveled portion} such that the planar portion has one or more ballast adjustment slots for removeably securing the ballast to the ballast rail, 
comprises
{ HEAD ~ the ballast rail } comprises a planar portion , an offset portion , a lip portion and { TAIL ~ a beveled portion } such that the planar portion has one or more ballast adjustment slots for removeably securing the ballast to the ballast rail ,
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH