NFPA 170, Standard for Fire Safety

The 2024 edition of NFPA 170 establishes the current standard for uniform fire safety and emergency symbols used by designers, architects, engineers, and emergency personnel. Among its key features are updated visual symbols for hybrid (water and inert) fire extinguishing systems—aligned with the new NFPA 770 standard—which help professionals involved in design and emergency planning clearly represent critical systems. The document provides standardized graphics for evacuation plans, emergency diagrams, and emergency management maps, enhancing clarity and response efficiency during crises.
This edition introduces revised symbols for hybrid extinguishing system components such as hangers, pipelines, valves, control units, and detectors for oxygen and fuel gases. It also presents a new consolidated table of symbols for Emergency Communication Radio Enhancement Systems (ECRCES). By offering consistent and widely recognizable visual representations, these updates support accurate communication of vital safety information across various emergency and building systems.