HOLLYMAN 20 & 45 SERIES FRAMES are manufactured by Hollyman Wood Products Ltd. The 20 Series Frames are fire-rated for 20 minutes for single openings up to 3' 0" wide x 9' 0" high and double openings up to 6' 0" wide x 9' 0" high. The 45 Series Frames are fire-rated for 45 minutes for openings up to 3' 0" wide x 8' 0" high.

To fabricate the frame, a fiberboard core is machined to form a two-piece split jamb and casing assembly (as illustrated in Figure #1). The casing and jamb sections are rabbeted to fit tightly as a tongue and groove joint. The casing is glued and nailed to the jamb to form a single strong unit. The door stop is part of the machined jamb profile (not applied later). The completed jamb components are then each wrapped with a true wood veneer or a polyester laminate.

To complete the assembly of the frame; components are mitered at the corners; drilled for pinning dowels in both the casing and jamb profiles and machined for the insertion of a corner connection screw. This draws the mitered components together (as illustrated in Figure #2). The jamb is machined for hinges and strikes. We have reinforced the 4 ½" hinges used for solid core doors with a (patent pending) hinge backer plate constructed from galvanized steel and pre-punched with self-threading die holes. As a standard, the frame comes with 2 - 2 ½" screws that are screwed through the hinge, the hinge backer plate and into the wall to give strong reinforcing support to the doors.

OUR 90 SERIES FRAMES are fire-rated for 90 minutes for openings up to 4' wide by 9' high. With a pair of doors the frames can span 6' wide by 9' in height.

The construction of the 90 series frames is different from the other frames. The 90-minute frames are made of cold-rolled steel, with a true wood veneer applied to the surface. They accommodate wall thicknesses from 57 mm up to 330 mm and will hold a 500 lb door.