Code 3060 applies to employers engaged in manufacturing metal covered wood core doors such as Kalamein, fire doors, steel doors and windows, window and door frames, sash and shutters.  The employer will use their own specifications or will use specifications provided by their customers.  Materials such as lumber, sheet metal, and hardware such as hinges, locks and doorknobs, are purchased from outside suppliers.  Prefabricated wood doors may also be received from outside suppliers or lumber is cut to size with the use of power machinery and secured to framing materials.  The sheet metal will also be cut to size with use of power machinery.  Depending on the sheet metal covered wood door, window or sash product type being manufactured and the employer’s fabrication technique, applying or adhering the sheet metal to the wood core product may involve gluing, drilling, bending, snapping, welding or bolting.  After the doors have been fabricated, hardware such as hinges, locks, doorknobs are added to the doors for completion.