What is the maximum distance a standard spray sprinkler should be located from obstacles to avoid obstructing the spray pattern?

The maximum distance a standard spray sprinkler should be located from obstacles to avoid obstructing the spray pattern is 9-1/2 inches. This distance is specified to ensure that the discharge from the sprinkler heads is not hindered by nearby structures or fixtures, which could interfere with the distribution of water and reduce the effectiveness of the sprinkler system in controlling or suppressing fire.

Keeping the spray sprinkler at this specified distance allows for optimal performance, ensuring that the water pattern reaches the target area effectively. This is critical for proper coverage and helps to achieve the desired density of water over the hazard being protected. If the sprinkler is placed closer to an obstacle, it might lead to shadowing effects, where parts of the intended area do not receive adequate coverage, increasing the risk during a fire incident.