: A minimum K-factor of 11.2 is now required for OH-2 and higher hazards.
: For professionals needing deeper context, the NFPA 13 Handbook includes the full text of the standard plus expert commentary and diagrams. Key Updates in the 2025 Edition
The latest 2025 edition introduces several critical changes for fire protection designers: Nfpa 13 Standards Download
: Plans submitted to local jurisdictions generally require detailed worksheets and computer-generated hydraulic calculations as specified by NFPA 13. Nfpa 13 Handbook - sciphilconf.berkeley.edu
: For ceilings over 30 feet, sidewall sprinklers are no longer permitted in Ordinary Hazard (OH-1) or higher occupancies. : A minimum K-factor of 11
: You can view NFPA 13 for free online through the NFPA Official Document Information Page. This provides read-only access to stay compliant without purchasing a physical copy.
: New protection options and criteria have been added for sloped ceilings in both storage and non-storage settings. Core Requirements Nfpa 13 Handbook - sciphilconf
: Covers everything from system types (wet, dry, pre-action) to water supply requirements and seismic bracing.
