What seismic-resistant features should be included when specifying a metal ceiling for earthquake-prone areas?

In earthquake-prone regions, metal ceiling systems must include specific seismic design features to ensure safety and code compliance. Start with flexible suspension components: use seismic-rated hangers, energy-dissipating clips, and lateral restraint systems that allow for building drift while preventing panel disengagement. Design the suspension grid with positive locking connections and redundant supports so individual component failure does not lead to progressive collapse. Incorporate perimeter anchorage that allows movement—sliding clips or slip joints—so the ceiling can expand or contract without damage. For large panels or continuous runs, add intermediate lateral bracing to limit out-of-plane displacement and maintain visual alignment. Coordinate with structural engineers to define maximum allowable inter-story drift and design ceiling attachments to accommodate that movement safely. Use tested seismic assemblies and follow applicable standards (e.g., ASCE 7, local seismic codes) that specify component performance and testing protocols. Consider lightweight materials to reduce inertial loads and provide separate support for heavy fixtures instead of relying on the ceiling grid. Lastly, plan for post-event inspection access and replacement strategies: use modular, easily replaceable panels and maintain spare parts inventory to accelerate recovery. Well-specified seismic details reduce risk to occupants and maintain ceiling integrity during and after seismic events.