E - Fixed Constructions – 04 – B
Patent
E - Fixed Constructions
04
B
20/18, 20/38.3
E04B 9/04 (2006.01)
Patent
CA 1308227
ABSTRACT A ceiling panel, in a drop ceiling, formed from a relatively large ceiling board and at least one rein- forcing metal channel affixed to the board top side, in which the channel has at least one opening shaped to form a tongue. The tongue extends into an opening on a metal plate which is mechanically affixed to the top of the board, such as by a plurality of tangs which penetrate the back of the board.
587988
National Gypsum Company
Osler Hoskin & Harcourt Llp
LandOfFree
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