At what distance should sidewall sprinkler head deflectors be located from the finished ceiling?

The correct answer regarding the distance sidewall sprinkler head deflectors should be located from the finished ceiling is 4 to 6 inches. This distance is significant because it ensures that the spray pattern of the sprinkler heads is effective in providing adequate coverage during a fire.

When sprinkler heads are installed too close to the ceiling, it can hinder the distribution of water, as the deflector may not allow for an optimal spread. Properly locating the deflector within the 4 to 6-inch range helps to ensure that the water is dispersed evenly across the intended area. This placement takes into account factors like fire dynamics and room geometry, allowing the system to operate effectively.

Additionally, adhering to this specification helps meet regulatory codes and standards that govern fire safety systems, ensuring that installations not only protect properties but also comply with safety regulations.