What is the maximum spacing allowed for detectors on a smooth ceiling?

The maximum spacing allowed for smoke detectors on a smooth ceiling is 30 feet. This distance is established by safety codes to ensure that smoke can effectively reach the detector, allowing it to perform its function of alerting occupants to the presence of smoke or fire. Spacing detectors too far apart can delay detection, posing increased risks in the event of a fire.

Smooth ceilings provide a more ideal surface for smoke to travel across compared to textured ceilings, where air currents can disrupt the flow. As a result, the regulation allows for this increased spacing on smooth ceilings. Other factors, such as airflow patterns, architectural features, and system design, may also affect the optimal placement and spacing of smoke detectors; however, the standard maximum of 30 feet is a key guideline for general installation practices.