E - Fixed Constructions – 04 – C
Patent
E - Fixed Constructions
04
C
20/18.9
E04C 2/42 (2006.01) E04B 9/12 (2006.01)
Patent
CA 1286470
ABSTRACT OF THE INVENTION In a fire-resistant suspended ceiling grid structure adapted to support ceiling tiles or the like, connecting apparatus between ceiling grid inverted T main and cross members disposed at right angles to each other and having upright central fins and bottom horizontal flanges comprise a locking tab formed in the tongue of the cross members that is V-shaped in cross section and contacts the web of the main member when a cross member has been inserted through a slot in the main member, an opening in the tongue of the cross member that allows the locking tab to flex back when the cross member is inserted through a slot in the main member, a fingernail and fingernail interlocking pocket formed in each end of the cross member to interlock oppo- sitely disposed cross members together and an interlock release pocket formed in the bottom of the fingernail inter- locking pocket to disengage interlocked cross members without damage to either cross member. A shear tab is formed in the web adjacent each tongue, which is intended to shear, or at least bend, to permit the cross member to expand through the slot in the main runner when the cross tee expands in a fire.
551056
Baker Harold C.
Worthington Armstrong Venture
LandOfFree
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