![]() The web portion 18 is generally vertically disposed in the installed condition of the respective runner 13, 14. At the top of its cross-section, each runner 13, 14, in the illustrated case, has a stiffening bulb or spine 17 which extends longitudinally at the top of a web element or portion 18. When installed, each of the runners 13, 14 has a cross-section that can be generally described as an inverted T-shape. The grid system 11 includes main or through runners 13 and lateral or transverse runners 14. The panels 12, as is conventional, are generally flat and rigid. Referring now to the figures, there is illustrated a suspended ceiling 10 which comprises a ceiling grid system 11 and ceiling panels 12 supported on the grid. ![]() 8 is a cross-sectional view of the ceiling taken in the plane indicated at the line 8-8 in FIG. 7 is a fragmentary perspective view of an end of a cross-runner with an end connector shown in phantom andįIG. 6 is a fragmentary bottom view of the through runner įIG. 5 is a fragmentary side elevational view of the grid through runner įIG. 4 is a fragmentary perspective view from below of a grid through runner įIG. 3 is a fragmentary bottom view of an intersection of grid runners of the invention įIG. 2 is a fragmentary perspective view from below of an intersection of grid runners constructed in accordance with the invention įIG. 1 is a view from below of a suspended ceiling embodying the invention įIG. A crease formed in the remaining visible flange material in the through runner transverse to its longitudinal axis improves the appearance of the faux miter joint by visually continuing the center plane seam of the intersecting transverse runners. The disclosed flange geometry allows miter notches to be cut into the flanges while sufficient stock remains in these elements at locations that produce a relatively high bending moment of inertia or section modulus. In another aspect of the invention, a faux miter joint between intersecting grid runners is formed while maintaining adequate lateral bending strength in a main or through runner. The seam between these diverging flanges gives the appearance of a joint between adjacent panels. At the lower part of the profile, the sheet stock diverges from the center plane into flanges that appear as the bevels of the associated panels. The sheet metal is bent or folded in a profile symmetrical about a central vertical plane. In the disclosed embodiment, the grid runners are formed of sheet metal rolled into a beam structure with a shape that is described generally as an inverted tee. This configuration contributes to the visual effect in which the grid is perceived to be part of the panels they support. As disclosed, the grid is configured to lie flush with the plane of the visible face of rabbeted panels. The bevelled detail can be used to compliment other architectural bevel features in a building to obtain an integrated motif. The construction thus gives the illusion of a gridless ceiling. The invention provides a suspended ceiling grid construction that is configured to look like bevelled edges of the panels supported by the grid. 4,505,083 discloses grid runners having a longitudinal recess such as an inverted V-shaped channel in the lower exposed face of the runners and faux miter joints. An example of such systems is illustrated in U.S. Such grid systems are often used in hospitals where patient privacy curtains or other equipment can be mounted on the T-fasteners. It is known to provide a generally T-shaped grid member with a downwardly open slot shaped to receive T-fasteners which can be positioned in the slot and used to support various equipment or fixtures. Such systems are extensively used and a need exists for a suspension ceiling system that is distinctive from this common arrangement. In such systems, the assembled grid and panels of the ceiling are a generally planar system in which the panels appear to provide a surface interrupted by a plurality of flat, relatively wide bands. In most prior art grid systems, the grid members or runners are formed with a cross-section of an inverted "T" and provide a lower or exposed flat surface formed by the oppositely extending flanges on which the panels are supported. Suspension grid systems typically provide grid members interconnected to form rectangular or square openings in which panels are positioned and supported.
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