Shaking table tests of models of grid system ceiling were conducted. An original design model fell down because upper flange of T-bars crashed by the bending moment from hangers and hangers themselves also opened and could not support T-bars. The models were revised as mentioned below and scheduled tests were completed without any damage. (a) A brace was connected to the same in-plane T-bar through supporting hanger. (b) The width of supporting hanger with brace was enlarged twice. (c) T-bar connection detail was revised to be able to transfer axial force directly.
