Patent ID: 6763642
Filing Date: 2004-07-20
Classification: E04B,Y10S

Abstract:
In a group of main beams, 4 ft. cross beams, and 2 ft. cross beams, capable of being assembled in the field into a ceiling grid forming 2 ft. by 2 ft. square openings, the assembled grid having:(a) connections between a main beam and two 4 ft. cross beams, and (b) connections between a 4 ft. cross beam and two 2 ft. cross beams; wherein both connections in (a) and (b) are made with connectors of the same design; the improvement comprising in combination, a tighter (a) than (b) connection, and a looser (b) than (a) connection, to form a more precise 2 ft.Ã—2 ft. opening in the assembled grid, wherein the position of a stop on a connector in the (a) connection and in the (b) connection determines whether the connection is tighter or looser.