Wall-Mounted (Sidewall) Sprinklers — Required Distances

By S. N. • Published 10/19/2025

For a **four-story R-3, Type VB building** in California protected by an **NFPA 13R sprinkler system**, wall-mounted (sidewall) sprinklers must meet the **NFPA 13R standard** and the **UL listing of the specific sprinkler head**. Unlike special-hazard or geometry-based occupancies, **the location type—such as a staircase—does not change these distance rules.** The required clearances and spacing remain the same throughout the building.