This architectural drawing is CLAMP SECTION in detail AutoCAD drawing, dwg file, CAD file. A clamp is a useful tool for holding a workpiece firmly in place as you work on it. The following situations call for the employment of a clamp: Woodworking and carpentry: To execute various woodworking activities, such as sawing or chasing, a clamp can be used to hold a piece of wood to a workbench. For more details and information download the drawing file.