The flange 28 may be provided on the interior of {HEAD ~ the curve} of {TAIL ~ the channel section} 14, and may have approximately three apertures 32 spaced along the length of the flange 
The flange 28 may be provided on the interior of { HEAD ~ the curve } of { TAIL ~ the channel section } 14 , and may have approximately three apertures 32 spaced along the length of the flange
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH