Fire-resistant members containing gypsum fiberboard
First Claim
1. A method of preparing an improved structure of the type having a glass panel supported by at least first and second framing members and having at least a 20 minute ASTM E-152 fire test rating, characterized by the steps comprising:
- attaching said first framing member to said second framing member to provide support for said glass panel, at least one of said framing members comprising a gypsum-containing fiberboard composition having a density of at least about 60 lbs/ft3, a flexural strength of at least about 30 lbs (1/2 inch thick material), and a screw-holding capacity of at least about 400 lbs, said composition containing a substantially uniform distribution of solids including about 65 wt.% to about 97 wt.% set gypsum dihydrate and about 1.5 wt.% to about 30 wt.% paper fiber.
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Accused Products
Abstract
Fire-resistant structures are provided having at least a 20 minute ASTM E-152 fire test rating. The structures include glass partition walls having framing members formed from a gypsum-containing composition having a density of at least about 60 lbs/ft3, a flexural strength of at least 30 lbs ( 1/2 inch thick material), and a screw-holding capacity of at least about 400 lbs. The gypsum-containing composition further contains a substantially uniform distribution of solids including about 65 wt.% to about 90 wt.% set gypsum dihydrate, about 7 wt.% to about 30 wt.% paper fiber, and about 1.5 wt.% to about 35 wt.% of one or more performance boosters selected from inorganic fiber, clay, vermiculite, and binder polymer.
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Citations
29 Claims
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1. A method of preparing an improved structure of the type having a glass panel supported by at least first and second framing members and having at least a 20 minute ASTM E-152 fire test rating, characterized by the steps comprising:
attaching said first framing member to said second framing member to provide support for said glass panel, at least one of said framing members comprising a gypsum-containing fiberboard composition having a density of at least about 60 lbs/ft3, a flexural strength of at least about 30 lbs (1/2 inch thick material), and a screw-holding capacity of at least about 400 lbs, said composition containing a substantially uniform distribution of solids including about 65 wt.% to about 97 wt.% set gypsum dihydrate and about 1.5 wt.% to about 30 wt.% paper fiber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An improved structure comprising:
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(a) a glass panel; and (b) framing members for framing and supporting said glass panel, at least one of said framing member comprising a gypsum-based framing member having a density of at least about 60 lbs/ft3. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification