A plastic door jamb member, for forming a portion of a door jamb, the plastic member having a recess for receiving a wooden doorjamb portion and; an interlocking attachment recess for interconnection with a metal reinforcement plate, so that the plastic door jamb member may be interengaged with a wooden door jamb portion, and further interengaged with a metal reinforcement plate, and installed in position as a combination door jamb assembly.
1. A plastic door jamb assembly for forming a door jamb within the structural wood framing of a building for use in combination with at least one wooden door jamb portion and a metal reinforcement plate, the door jamb assembly comprising;
a wooden door jamb portion defining an inward face, and a tapered nose portion;
a door jamb plastic member in turn comprising,
a hollow plastic extrusion having a doorway outer wall, and a concealed side;
a nose channel on said concealed side which receives said tapered nose portion of the wooden door jamb portion;
a metal reinforcement plate lying flat on said inward face of said wooden door jamb portion, between said structural wood framing of a building and said inward face of said wooden door jamb portion;
a plate retention groove in said hollow plastic extrusion for engagement by said metal reinforcement plate;
an angled junction wall on said hollow plastic extrusion extending at an angle from said nose channel overlying said tapered nose portion of said wooden door jamb portion;
an angled surface on said tapered nose portion of said wooden door jamb portion;
a fastener passing through said junction wall of said hollow plastic extrusion and secured into said angled surface of said tapered nose portion of said wooden door jamb portion;
a rectangular attachment face extending from said junction wall, overlying said nose portion of said wooden door jamb portion;
a retention hook on the metal reinforcement plate engageable in said plate retention groove when said metal reinforcement plate is sandwiched between said structural wood framing of a building and said wooden door jamb portion;
a locking channel formed in said wooden door jamb portion;
a hook extension formed on said rectangular attachment face, for interengagement in said locking channel;
a reduced thickness portion on the wooden door jamb portion, which is adapted to receive the metal reinforcement plate, and permit said metal reinforcement plate to lie flat against said wooden door jamb portion, with said metal reinforcement plate overlying said hook extension;
whereby the plastic door jamb member is interengaged with the wooden door jamb member, and with the metal reinforcement plate lying flat against said wooden door jamb member.
2. A plastic door jamb assembly as claimed in claim 1 including a tooth portion on said door jamb plastic member, and a recess in said wooden door jamb portion for interengaging with one another so that the two may be interengaged together and held securely.
3. A plastic door jamb assembly as claimed in claim 2 including locking channel on one side of said wooden door jamb portion, and wherein said recess is on an opposite side of said wooden door jamb portion, thereby forming two channels on opposite sides of the wooden door jamb portion.
4. A plastic door jamb assembly as claimed in claim 1 including a generally outwardly flared face on said plastic door jamb member extending outwardly to provide an entry.
5. A plastic door jamb assembly as claimed in claim 1 including a trim strip placed in a channel formed on an exterior finish extrusion.
6. A plastic door jamb assembly as claimed in claim 1 including a screen door frame which fits in a channel and is secured to an exterior finish extrusion, and exterior the finish extrusion secured to the plastic door jamb member, and wherein said screen door comprises a roller screen extendable across the door way.
7. A plastic door jamb assembly as claimed in claim 1 wherein the door jamb plastic member includes first and second parallel spaced apart upright members and a third door jamb plastic member which is secured to the first and second door jamb plastic members to form the top portion of the door jamb, and, at least one channel shaped recess for receiving a continuous weather strip therein.
8. A plastic door jamb assembly as claimed in claim 1 , wherein the door jamb plastic member includes a door stop portion, located whereby to securely engage against a portion of the door.