Abstract: A suspension ceiling grid for supporting rectangular panels. The grid members are elongated runners with a generally inverted T-shaped cross-section. Flanges on the lower side of the runners have inclined exposed portions and vertical portions concealed by rabbeted edges of the panels. The flange portions are configured with respect to the proportions of the rabbeted panels, to appear as beveled edges of the panels whereby the finished ceiling appears to be gridless. The runners are specially notched and trimmed to provide a strong but attractive faux miter joint at their intersections.

Abstract: A suspended ceiling grid system with an integrated aperture for accessories such as lights, air diffusers and like accessories. The system has an appearance ring of suitable size that forms the aperture and that interconnects with runner elements of corresponding suitable length. The ring is disposed at the geometric center of a grid module and the interconnected runners are arranged to provide support for the ring and related accessory.