What is the minimum spacing required between an upright sprinkler head and a hanger rod?

The minimum spacing required between an upright sprinkler head and a hanger rod is 3 inches. This standard is set to ensure that the sprinkler can function effectively and without obstruction. The spacing allows for adequate water distribution and minimizes any interference that could be caused by the hanger rod, which may block or redirect the water spray pattern.

Maintaining this spacing is essential because it helps prevent situations where the water from the sprinkler head does not reach the intended area due to physical barriers. Moreover, proper spacing contributes to the overall reliability and effectiveness of the fire protection system, ensuring that in the event of a fire, the sprinkler can perform optimally.