Static structures (e.g. – buildings) – Framing to receive door – doorjamb – or window sash
Patent
1992-08-20
1994-09-20
Ridgill, Jr., James L.
Static structures (e.g., buildings)
Framing to receive door, doorjamb, or window sash
52213, 52232, 52217, 49504, B06B 108
Patent
active
053477804
ABSTRACT:
A door frame having excellent fire-resistance, flexural strength and screw holding properties is fabricated from gypsum fiberboard, specifically a gypsum fiberboard having a density of at least 60 lbs./cu.ft., a flexural strength of at least about 30 lbs. (1/2" thick material), and a screw holding capability of at least about 400 lbs. A preferred gypsum fiberboard material for fabrication of the door frame comprises a composition containing a substantially uniform dispersion of solids including by weight about 65% to 90% set gypsum, about 7% to about 30% pulped paper, up to about 9% binder, and about 0.8% to 2% inorganic fiber. A wood veneer is preferably applied to the visible faces of the gypsum fiberboard door frame members.
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Fowler, Jr. George F.
Francis Hubert C.
Richards Turner W.
Georgia-Pacific Corporation
Ridgill, Jr. James L.
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