Channels is usually formed from metal sheet, folded over into an open channel shape with inwards-curving lips to provide additional stiffness and as a location to mount interconnecting components. Strut usually has holes of some sort in the base, to facilitate interconnection or fastening strut to underlying building structures.
For more Technical details, go to DOWNLOADS , please visit Jazeera Steel Products Catalogue (Page Nos. 27 , 28, 29, 30, 31 & 32 )