Fire rated grid-member with controlled expansion means

Details Fire rated grid-member with controlled expansion means Fire rated grid-member with controlled expansion means

1974-08-01

1976-06-29

Purser, Ernest R.

Static structures (e.g., buildings)

Irreversibly reactive component

52573, 52DIG5, E04B 168

Patent

active

039656314

ABSTRACT:
A fire rated grid-member having fixed end points and the web thereof absorbing thermally induced longitudinally compression which results from fixed end point reaction forces. The grid member further includes a bead surmounting the web which is deformed to create a plurality of weakened portions which deform further upon grid member compression to thereby absorb longitudinal compression in the bead. Each deformed portion of the bead comprises opposing portions of the bead sides being crimped together to form a plane of abutment which is obliquely disposed to a limited extent with respect to the longitudinal axis of the bead. Such a disposition of the plane of abutment minimizes the reduction in compressive strength of the bead while assuring that deformation of the bead will occur in a desired manner during thermally induced compression of the grid member so as to maintain a supported grid network in position.

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