Abstract: A ranged, hollow, coffered rectilinear structure having integrally joined side member for hanging within a conventional, suspended T-bar subceiling matrix. Optionally the rectilinear structure may have a lip beneath the flange so that when two side members of two structures sit opposite one another on a conventional T-bar rail, both side members cooperate to reveal a space beneath the T-bar for mounting an additional track assembly, such track lighting, to the T-bar rail. Cross members in the hollow rectilinear structure add to its aesthetic appeal. A single cross member bisecting the rectilinear structure is formed so that it may be split, creating two smaller rectilinear structures having uniformly shaped, flanged side members for hanging within smaller T-bar matrices. By modifying the T-bar matrix and the rectilinear structure, a 3-Dimensional T-bar matrix is formed in the suspended ceiling, allowing rectilinear structures to be oriented on each other in both the horizontal and vertical planes.