Static structures (e.g. – buildings) – Facers; e.g. – modules – mutually bonded by internal settable... – Lapped or bridger strip juncture-type surfacing
Patent
1986-06-09
1988-03-01
Perham, Alfred C.
Static structures (e.g., buildings)
Facers; e.g., modules, mutually bonded by internal settable...
Lapped or bridger strip juncture-type surfacing
52317, 52410, 52488, 52573, 52747, 411368, 411480, 411533, 411544, E04B 274, E04B 280, E04B 168
Patent
active
047277009
ABSTRACT:
A ceiling or wall for a partition structure that contains framing members has the usual sheets of wallboard applied side-by-side to the framing members so that seams exist between the edges of adjacent sheets. Improved fire resistance is derived from runners which extend between the framing members directly behind the seams so as to serve as fire stops and as additional support for the wallboard sheets. Each runner is at its ends attached to the framing members between which it extends and further consists of several components which slip relative to each other, so that the length of the runner remains constant even though its components experience thermal expansion. This prevents the runners from bowing and pushing the wallboard sheets away from the framing members in the event of a fire. The runners further receive and anchor edge fasteners. Each edge fastener consists of a screw which passes through a seam between two sheets and threads into the runner behind that seam and also a disk which the screw draws up against the exposed surfaces of the sheets on each side of the seam. The disks, while supporting the sheets, allow the sheets to shrink without destroying their structural integrity in the region of support. A method of installing the ceiling or wall surface is also described. The runners have tabs which cause them to be located against the edge of the first sheet so as to be centered with respect to the seam when the second sheet is attached to the framing members.
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"Gypsum Board", Georgia-Pacific, pp. 22-24, 1975.
"Fire Resistance Design Manual", Gypsum Association, Tenth Edition, 1983, cover, pp. `-11 and 43-60.
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