What is one requirement for suspended ceilings in DSA structural enforcement projects?

In the context of DSA (Division of the State Architect) structural enforcement projects, one critical requirement for suspended ceilings is the need for horizontal restraint points every 12 feet. This specification is important for maintaining the structural integrity of the ceiling system, especially during seismic events. These restraint points help to limit lateral movement and ensure that the ceiling remains attached and stable, reducing the risk of collapse or damage during an earthquake.

The requirement for horizontal restraint points aids in distributing forces across the ceiling grid and ensures that the system can withstand imposed loads while maintaining its safety and functionality. This practice aligns with the overall objective of DSA projects to promote safety by adhering to strict building codes and guidelines that address seismic performance.

Other options refer to different considerations but do not meet the specific structural requirements outlined for suspended ceilings in DSA projects. For example, having no horizontal restraint points or limiting attachments to drywall would not provide adequate support or structural stability, and relying solely on ground support is contrary to the design principles needed for effective ceiling systems in seismic-prone areas.