Computer numerically controlled (CNC) machines that offer increased productivity are used increasingly for punching, cutting, and other operations. Their use can reduce the time required for material handling and layout, as well as for punching, cutting, or shearing. Such machines can handle plates up to 30 by 120 in by 11⁄4 in thick. CNC machines are also available for fabricating W shapes, including punching or drilling, flame-cutting copes, weld preparation (bevels and rat holes) for splices and moment connections, and similar items.
CNC machines have the capacity to drill holes up to 19⁄16 in in diameter in either flanges or web. Production is of high quality and accuracy.