For smooth ceilings, what is the required detector spacing related to the selected spacing?

For smooth ceilings, the required spacing for smoke detectors is typically set at 0.7 times the selected spacing. This multiplier is based on testing and fire safety standards that dictate how far apart detectors can be placed while still effectively detecting smoke. The rationale behind 0.7 times is to ensure that if a fire starts, the smoke will be detected promptly, minimizing the response time and maximizing safety.

Utilizing this spacing allows for coverage that accounts for the way smoke rises and disperses in a smooth ceiling environment, ensuring that detectors are optimally positioned to react to smoke particles as they accumulate. Adequate spacing can result in a significant increase in safety for occupants by facilitating quicker alarms. The other spacing values mentioned either do not reflect the required distances for optimal safety or imply a less effective arrangement, leading to potential gaps in detection capabilities.