Patent ID: 8117793

Claim:
A suspended ceiling grid system comprising at least first and second grid members extending end-to-end in opposite directions from each other, the first and second grid members each including reinforcing bulb and a central web, with a tab extending from the web, a separation joint for securing the first grid member to the second grid member and for providing limited movement of the first and second grid members toward and away from each other comprising: an elongated slot in each grid member extending from the web of the grid member into the tab associated therewith, the slots of the grid members being aligned when the grid system is assembled, and a fastener having a shaft portion received in a portion of the tab of at least one of the grid members distally of the slot and in the slot of the tab of the other grid member, the elongated slot in each grid member including a seat for locating the fastener, the seat being sized to receive the shaft portion of the fastener and the slot being narrower than a diameter of the shaft portion of the fastener.