... , available width and thickness. Ceiling channels: 1) Supporting channel: a) U 38 x 0.7, 0.8, 1.0, 1.2mm ... b) U 50 x 0.8, 0.9, 1.0, 1.2mm ... c) U 60 x 1.0, 1.2mm 2) Covering channel: a ... , 0.50, 0.60, 0.70mm b) U 100 x 0.60, 0.70mm c) U 150 x 0.80, 1.00, 1 ... , 0.57, 0.60, 0.70, 0.80mm b) C 100 x 0.57, 0.60, 0.70, 0.80mm c ...