What are sidewall sprinklers required to follow in an NFPA 13 D system?

Sidewall sprinklers in an NFPA 13D system must adhere to their listing limitations, which are established by the Underwriters Laboratories (UL) or similar testing organizations. These limitations define the specific performance characteristics of the sprinklers, including their spacing, orientation, and the types of environments in which they can be used. Adhering to these limitations ensures that the sprinklers will function effectively and reliably in case of a fire, maintaining the safety standards intended for life protection in residential occupancies.

While local codes, general industry standards, and manufacturer guidelines can be relevant in the installation and compliance process, the primary requirement for sidewall sprinklers in an NFPA 13D system is their adherence to the listing limitations set forth by the appropriate authorities. This focus on listing limitations emphasizes the importance of using approved equipment that has been rigorously tested for effectiveness in specified applications.