An elongated framework has upper and lower clamps for holding a pair of chord members in parallel, laterally spaced relation. Stapler mechanism is provided on the framework for driving staples into the upper and lower edge surfaces of the two chord members while the latter are held by the clamps for connecting them in their laterally spaced relation for subsequent construction into truss joists. Two of the stapling mechanisms are provided for applying upper and lower staples at two longitudinal points along the chord members, and drilling mechanism is provided on the framework between the two stapling mechanisms for providing lateral drilled holes in the chord members.