In one arrangement, {HEAD ~ each channel section} can include {TAIL ~ a flange} along both sides thereof, the connection mechanism being provided on each flange 
In one arrangement , { HEAD ~ each channel section } can include { TAIL ~ a flange } along both sides thereof , the connection mechanism being provided on each flange
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH