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