A suspended ceiling grid assembly including parallel spaced main runners and pairs of cross runners on opposite sides of a main runner, the main runners having vertical slots spaced along their lengths, the cross runners having end connectors mutually inter-engaged in a common main runner slot, a brace stabilizing the pair of cross runners against relative hinge action in a vertical plane, the brace being a thin metal body having a cross section complimentary to a cross section of the cross runners, the brace abutting sides of the cross runners and being rigidly attached thereto.