DLT Series The DLT Series are produced as a C channel section with a 1 1/2" flange, with no returns. Sections typically available in 12, 14, 16, 18, and 20 gauge. May also be available in 22, 21, 19, 17, and 13 gauge. Standard depths are 1-5/8", 2-1/2", 3-1/2", 3 5/8", 4", 6", 8", 10", and 12". Return to Steel Studs