Which of the following measurements indicates the maximum spacing for smoke detectors on sloped ceilings with steep angles?

The measurement that indicates the maximum spacing for smoke detectors on sloped ceilings with steep angles is 0.9m (3ft). This specification is important because smoke tends to rise and collect near the highest point of a sloped ceiling. When installing smoke detectors in these areas, adhering to proper spacing guidelines ensures that the detectors are effectively positioned to sense smoke as it accumulates.

By placing smoke detectors no more than 0.9 meters away from the peak of the ceiling, you're ensuring they can quickly and accurately detect any smoke that gathers there, which is especially crucial in environments where swift detection can save lives and property. The requirement for tighter spacing on sloped ceilings compared to flat ceilings accounts for the unique airflow dynamics and smoke movement in such areas.

Understanding these guidelines is essential for safety and compliance with fire protection regulations, highlighting why proper installation practices are critical for effective fire detection systems.