Static structures (e.g. – buildings) – Irreversibly reactive component
Patent
1984-09-06
1986-07-08
Levy, Stuart S.
Static structures (e.g., buildings)
Irreversibly reactive component
52664, 52DIG5, E04C 252, E04C 304
Patent
active
045985146
ABSTRACT:
A fire-rated type suspension ceiling grid runner is disclosed having expansion means intermediate its ends which collapse when the runner expands due to elevated temperatures occurring during a fire or the like. The runner provides a boxlike panel supporting flange along the lower end of the web thereof in which slots are formed to define a flange segment and connecting legs. When the expansion means collapses, the flange segment is laterally displaced as a unit and remains connected to each adjacent portion of the boxlike flange by at least two longitudinally spaced legs. The displaced flange segment functions as a bridging beam which continues to connect the adjacent portions of the flange and maintain them in alignment so that a grid formed of the runners can continue to maintain proper support for panel even when fire conditions occur.
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Donn Incorporated
Levy Stuart S.
Sohacki Lynn M.
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