Abstract: An improved fabrication apparatus is provided for the placing screws accurately and reliably into body panels of cargo trailers. The apparatus uses a template that is positioned over the aluminum body panels of a cargo trailer to guide the placement of automatic screwdriver tools, so that the body panels are quickly and accurately mounted to vertical ribs that are part of the framework of the trailer. The invention includes a fabrication fixture that holds the template at predetermined positions to align the template with the ribs of the trailer's framework.

Abstract: An improved hand-held fastener driving tool is provided with an adjustable torque limiting control. The tool is portable, and is electrically powered using either a battery pack or a power cord as a power source. The tool drives collated fasteners (e.g., screws) into solid objects. The motor current is measured to determine the amount of torque being applied to a screw by the motor and mechanical drive components. As the screw bottoms out, the motor torque increases to a point where it exceeds the user-adjusted torque limiting control. The motor is automatically turned off at that point, thereby preventing the screw from being stripped.