When placing a smoke detector on a drop ceiling tile what weight data is involved?

• A. can hold up to 50 lbs
• B. can hold up to 20 lbs
• C. must be under 5 lbs
• D. must be exactly 10 lbs

Answer: (B)

When you put a smoke detector on a drop ceiling tile, you have to pay attention to the load rating of the tile and its supporting grid. The weight data you’re concerned with is the maximum weight that the tile/grids and the mounting hardware are rated to carry. For many suspended ceilings, that safe load is about 20 pounds. So as long as the detector and its mounting hardware stay under that limit, the tile can hold it securely. If you need to mount something heavier or place multiple devices on one tile, you’d use a different mounting method tied to the structural ceiling or a heavier-rated support. This is why the applicable weight data is up to 20 pounds.