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