Suspension ceiling grid runner with expansion means

Details Suspension ceiling grid runner with expansion means Suspension ceiling grid runner with expansion means

E - Fixed Constructions

04

B

20/18.1

E04B 9/08 (2006.01)

Patent

CA 1252266

SUSPENSION CEILING GRID INNER WITH EXPANSION MEANS ABSTRACT OF THE DISCLOSURE 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 temperature 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 panels even when fire conditions occur.

489026

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