This test method helps predict the performance that can be encountered during a seismic event of a full-scale suspended ceiling system using a dynamic seismic simulator (shake table). The test assemblies are suspended from a test frame with specific dynamic properties.
The response of nonstructural components such as suspended ceiling systems can significantly affect the functionality of a building after an earthquake, even when the structural components are undamaged. Traditional suspended ceiling systems which consist of typical direct hung T shaped main runners and cross tees are installed according to the prescriptive requirements contained in Practice E580 and ASCE 7. Specification C635 and Practice C636 cover suspension systems and do not address seismic restraint of suspension systems or the performance of the ceiling panels. The performance of these traditional ceiling suspension systems is determined by mechanical testing of the connections strengths and the load-carrying capability of the suspension members. Practice E580 contains specific instructions concerning the placement of hanger wires, perimeter fastening, and seismic bracing. In addition, the ceiling panels or tiles are not always supported on all four sides of the suspension members.The integrity of ceiling systems depends on the ability of the ceiling infill panels to remain in place during an earthquake and on the structural integrity of the suspension system. No current ASTM standard or practice address the performance of these non-traditional suspended ceiling systems. This test method gives a procedure for full scale evaluation that can be used by anyone with an interest in this type of performance such as AHJs and code officials.
KeywordsSeismic performance; Suspended ceiling systems; full-scale dynamic testing
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top