A multi-purpose adjustable doorjamb assembly includes at least three elongate members: a first side member, a second side member, and a cross member. Each elongate member has an inside longitudinal face opposite an outside longitudinal face. Each face has a longitudinal notch defined therein. The side members are attached to either ends of the cross member to form an open-sided rectangle. The assembly may also include at least three door stops. The jamb assembly may be used to accommodate swinging doors, bi-fold doors, or sliding doors. Finally, each elongate member may include a front longitudinal edge and a back longitudinal edge. Each edge has a longitudinal trim notch. The assembly further includes L-shaped trim members each having a mating leg for adjustably mating with the trim notch and a decorative leg. By using a trim member on both sides of an elongate member both narrow and wide walls can be accommodated.

Horizontal hinged door assemblies such as sidewalk doors comprising a door, a frame surrounding the door and a hinge connecting the door to the frame are improved by utilizing an anchor device which is inserted into an opening in at least one of the frame walls forming an outwardly extending flange for securing the door assembly to the structure forming the opening to be covered. The anchor device may be inserted into the frame during fabrication of the door assembly or on-site during installation of the door assembly. A variety of elongated shaped anchor devices may be used depending on the type door assembly installation. The anchor devices are preferably bendable to conform the anchor device to the site to which the door is being secured.

A wallboard fastening member and methods of using the same which is adapted to be positioned as a wall stud or joist between existing studs or joists present in a walls and ceilings of residential, commercial and industrial structures. The wallboard fastening member in accordance with the present invention is intended to be used where opposing ends of a piece of wallboard, such as gypsum drywall wallboard, are not aligned with an existing stud or joist to avoid the necessity of fitting up or cutting the wallboard and thus creating undesirable scrap. The preferred embodiment of a wallboard fastening member is a generally elongated member and preferably includes a stepped configuration on one side to permit the wallboard fastening member to fasten adjacent pieces of wallboard having different sizes by using the side having a stepped configuration or to fasten adjacent pieces of wallboard of the same size by using the flat side. In addition, if desired, wallboard fastening member can include score lines or perforations to permit the length of wallboard fastening member to be easily and quickly adjusted.