How are "lean-to" structures specifically addressed in NFPA 13?

"Lean-to" structures, which are typically attached to an existing building and have one sloped roof, have specific considerations when it comes to sprinkler system design and installation. The correct answer highlights the importance of assessing these structures to determine their unique requirements.

In NFPA 13, "lean-to" structures may have different fire hazards and building characteristics compared to typical standard structures. These factors can include the proximity of the lean-to to the main structure, the materials used, and how fire and heat may transfer between the two buildings. As such, a thorough assessment ensures that the sprinkler system effectively addresses the fire risks associated with the design and layout of the lean-to.

This focus on unique sprinkler installation requirements supports the overall safety and fire protection of both the lean-to and the adjacent primary structure. Understanding these distinctions is crucial for fire safety professionals and ensures compliance with NFPA 13 standards.