Gypsum ceiling studs and channels are lightweight galvanized steel profiles that form the framework for fixing gypsum boards. In a ceiling, perimeter channels define the edges, while the supporting profiles provide fixing points for the boards. In drywall partitions, vertical C-studs fit into U-channels fixed at the floor and ceiling to form the wall frame. The profiles are easy to cut and install, and they help keep the boards aligned for a smooth finish.