Associate Safety Professional Practice Exam

For sprinkler head placement, what is the minimum clearing space required underneath and around the sprinkler heads according to NFPA 13?

1. 6 inches

2. 12 inches

3. 18 inches

4. 24 inches

The correct answer is: 18 inches

The minimum clearing space required underneath and around sprinkler heads according to NFPA 13 is 18 inches. This requirement ensures that there is adequate space for the sprinkler to operate effectively and that the water spray pattern is unobstructed. An 18-inch clearance helps to prevent any interference from obstructions, such as light fixtures or ductwork, which could hinder the sprinkler's ability to deliver water over the required area in the event of a fire. This clearance also gives sufficient room for maintenance and inspection. When sprinklers are adequately spaced, they can perform optimally, ensuring safety and compliance with fire protection standards.