Abstract: The instant invention relates to the manufacture and/or repair of trailer and truck decks or similar. In particular, the invention relates to the installation of self tapping screws into pre-drilled holes or the installation of self drilling, self tapping screws where no hole yet exists. The machine has a cross beam with rails for a wheeled carriage which supports a linear actuator for an automatic screwdriver or, in another variation, a screw driving machine with an integral linear actuator. This wheeled carriage facilitates the movement of the screwdriver in a straight line in the X direction, laterally, across the deck, while wheeled trucks on the cross beam allow it, along with the carriage, to be moved in the Y direction, longitudinally, down the length of the deck. The actuator moves the screwdriver axially (Z direction) with each installation of a screw. Said movement is facilitated by a linear actuating device, such as a pneumatic cylinder.