Traditional ceilings in rigis buildings generally caused few problems when under earthquake attack. The introduction of modern suspended ceilings with light metal grids and lay-in tiles or light fittings has created an entirely new situation. Increased flexibility of modern buildings has added to the problem, particularly with respect to the integration of ceilings and partitions. The authors discuss the theoretical considerations of the problem and relate these to evidence from earthquake damage. Code requirements are reviewed and a number of typical solutions are presented. Economics are briefly discussed and in conclusion the authors refer to a number of aspects not fully understood at present. Suggestions are made for further study and testing to clarify some dynamic aspects and fire barrier problems.