Abstract: A joint apparatus for joining two objects together with end faces in face-to-face engagement includes first and second flat plates for attachment to faces of the respective objects adjacent the end face. Each plate has a first side edge for facing the first side edge of the other plate when secured to the respective object, and the first side edges each have at least one tongue and recess positioned for alignment with the recess and tongue of the other plate, respectively. The plates are positioned on the respective objects such that the tongues project out from the end face of the object and engage in the recess of the other plate when the end faces are abutted, in a zipper-like fashion. The plates may be temporarily clamped together while the tongues are secured to the face of the opposing object, thereby forming the joint.