In recent years, three major ceiling grid manufacturers in the United States have conducted extensive earthquake simulator testing of suspended ceilings. The tests to date have followed the ICC-ES AC-156 protocol and have been performed on an elevated test frame of limited size. The test protocol was developed to be applicable for a wide array of nonstructural components and is referenced in the building codes as a standard when testing nonstructural components. The tests have provided researchers and engineers with invaluable data and have enabled manufacturers to assess the seismic performance of their components with a degree of reliability. However, the tests have also revealed shortcomings in the current experimental and evaluation procedures. It is proposed to develop a second-generation test protocol that takes into account the unique properties of suspended ceilings such as multiple attachment points and large floor plan, and to address evaluation questions including qualification levels and performance targets.
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