What does NFPA 13 mandate regarding obstruction control?

NFPA 13 emphasizes the importance of effective obstruction control in the design and installation of sprinkler systems. The standard specifically mandates that obstruction by structures or materials must be prevented to ensure that water from the sprinklers can effectively reach and extinguish a fire. This control is critical because any obstruction can impede the flow of water, reducing the sprinkler's effectiveness and potentially leading to a greater loss.

The standard provides guidelines on how to assess and address potential obstructions in the environment where sprinklers are installed, including the necessary clearances around the sprinklers. This ensures that the intended spray pattern and coverage are maintained, allowing for optimal performance during a fire event.

By focusing on preventing obstructions, NFPA 13 aims to create a reliable fire protection system that functions as intended when needed most.