Abstract: A system and method for forming flush joints and improving the shear strength in wallboard panels are provided. The system includes using a clamping mechanism to apply simultaneous opposing pressure against the butt joint area so as to cause the edges of adjacent wallboard panels to align level with the plane of the drywall panels. In certain implementations, the system utilizes an elongated tie strap to interconnect a back support disposed on the back side of the drywall panels with a tensioning device which is disposed on the front side of the panels. Adhesive prepackaged in packets can be used to attach the back support to the drywall.

Abstract: A wallboard system composed of panels having weldable joint areas is disclosed. The panels are joined together by a connector that can also be utilized to align adjacent panels. Each panel has a reinforcement grid either embedded therein or attached thereto. Preferably, the reinforcement grid is made of a network of horizontal and perpendicular conduits that extend across the panel. The connector is interposed between the sidewalls of adjacent panels and the end portions of the conduits from each panel are configured to mate with respective areas of the connector, thereby forming a flush joint between adjacent panels. The connectors may include a generally L-shaped corner bead that fills the joint areas between panels forming inside or outside corners.