the upper part of the stem and provides an attractive reveal on the visible face of the flange application_number US 58433600 A description fig1 illustrates a specialty three dimensional suspended ceiling system 10 constructed in accordance with the invention the system 10 includes parallel rows of main runners or tees 11 interconnected with cross runners 12 to form a grid 13 supported on the main runners 11 are decorative lay in panels 14 segments 16 17 of the main runners 11 are curved in vertical planes so as to form vaults 16 or valleys 17 typically an architect or designer can select combinations and patterns of these vaults 16 and valleys 17 or simply all vaults or all valleys as he or she chooses to construct the desired look the adjacent ends of the segments 16 17 of the main runners 11 are joined together by suitable clips 18 having bendable tabs inserted into appropriate slots provided in the segments adjacent their ends the main runners 11 are suspended from overhead structure by wires 19 in a generally conventional manner except that the horizontal spacing between wires along a given main runner varies in relation to the inclination of the local part of a runner since the holes for receiving the suspension wires are uniformly spaced along the arcuate length of the runner this irregular spacing requires extra attention by the installer and can present situations where accurate placement of the suspension points for the wires in both the longitudinal direction.