Abstract: A double or single hung window assembly includes a rectangular main frame formed by a pair of vertical jamb members rigidly connected by a horizontal sill member and a horizontal head member, and each of the members comprises an extrusion of rigid plastics material. The frame members have outer walls for the rough window opening and laterally spaced inner sloping walls, and the inner and outer walls mate at mitered welded corner joints. The jamb members also have inner channel walls for receiving sliding hardware for at least one sash frame formed of extrusions of rigid plastics material. The inner sloping wall of the sill member has an upwardly projecting integral rib which cooperates with a downwardly projecting stop member or rib on the bottom of the sash frame to limit deflection of the sash frame under high negative windloads.

Abstract: A deck plank is co-extruded from an extrusion die which receives molten plastics materials supplied from three separate plastic extruders to provide the plank with opposite sides having different colors. Preferably, the base plank is extruded from a lower cost material such as reground scrap polyvinylchloride (PVC), and thin PVC cap layers are co-extruded on opposite sides of the base plank in different colors. Opposite edges of each plank have longitudinally extending grooves for receiving hidden fasteners in the form of screws extending through short flat tie pieces or a continuous sealing tie strip projecting into the opposing grooves of adjacent planks.

Abstract: A double or single hung window assembly includes a rectangular main frame formed by a pair of vertical jamb members rigidly connected by a horizontal sill member and a horizontal head member, and each of the members comprises an extrusion of rigid plastics material. The frame members have outer walls for the rough window opening and laterally spaced inner sloping walls, and the inner and outer walls mate at mitered welded corner joints. The jamb members also have inner channel walls for receiving sliding hardware for at least one sash frame formed of extrusions of rigid plastics material. The inner sloping wall of the sill member has an upwardly projecting integral rib which cooperates with a downwardly projecting stop member or rib on the bottom of the sash frame to limit deflection of the sash frame under high negative windloads.

Abstract: A double hung window assembly includes a rectangular frame formed by a pair of vertical jamb members connected by a horizontal sill member and a horizontal head member. Each of the members comprises a one-piece extrusion of rigid plastics material, and the members are rigidly connected with upper and lower welded mitered corner joints. The jamb and sill members have outer walls for the rough window opening and laterally spaced inner sloping walls which mate at the bottom corner joints. The jamb members also have inner channel walls spaced laterally inwardly of the corresponding sloping walls to define channels for receiving hardware for upper and lower sash frames each including extrusions of rigid plastics material.

Abstract: A double hung window assembly includes a rectangular frame formed by a pair of vertical jamb members connected by a horizontal sill member and a horizontal head member. Each of the members comprises a one-piece extrusion of rigid plastics material, and the members are rigidly connected with upper and lower welded mitered corner joints. The jamb and sill members have outer walls for the rough window opening and laterally spaced inner sloping walls which mate at the bottom corner joints. The jamb members also have inner channel walls spaced laterally inwardly of the corresponding sloping walls to define channels for receiving hardware for upper and lower sash frames each including extrusions of rigid plastics material.