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