Beam for drywall ceiling
AssigneeWorthington Armstrong Venture
InventorWilliam J. Platt
Life of this patent
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Abstract
A beam for a grid in a ceiling that has drywall affixed to the grid by self-tapping screws. The beam has a hem rolled downwardly and inwardly along the edge of both flanges of the beam. The hem prevents the flange from bending upward and sliding off the screw tip. The screw tip enters one of many indentations in the flange and is captured. The captured screw tip penetrates the flange and secures the drywall to the beam. The beam does not have a face cap over the flanges.
Claims3
For use with a suspended drywall ceiling (25), a beam (23) having an inverted T cross-section with a bulb (59) at the top, a layered web (55, 56) extending downwardly from the bulb, and flanges (61, 62) extending oppositely from the web,
- the improvement comprising:
- a. a portion extending continuously along the edge of each flange (61, 62) that is folded downwardly and inwardly on the bottom of each flange to form a hem (65), and
- b. upward indentations (60) on the bottom of each flange (61, 62).
Dependencies are inferred from the claim text.