{HEAD ~ Each C shaped channel} 18 includes a pair of opposed generally L shaped legs 34 and {TAIL ~ an interconnecting portion} 36 extending between legs 34 
includes
{ HEAD ~ Each C shaped channel } 18 includes a pair of opposed generally L shaped legs 34 and { TAIL ~ an interconnecting portion } 36 extending between legs 34
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH