NFPA 221:2024

Chapter 1 Administration 1.1 Scope. 1.2 Purpose. 1.3 Application. 4.12 Insulation and Siding. Chapter 5 High Challenge Fire Walls 1.6 Units. Chapter 2 Referenced Publications 2.1 General. 2.2 NFPA Publications. 2.3 Other Publications. 2.4 References for Extracts in Mandatory Sections. Chapter 3 Definitions 3.1 General. 3.2 NFPA Official Definitions. 3.3 General Definitions. Chapter 4 General Requirements 4.1 Scope. 4.2 Design Loads. 4.3 Fire Resistance Ratings. 4.4 Performance-Based Design. 4.5 Ducts and Air-Transfer Openings. 4.6 Double Wall Assemblies. 4.7 Impact Damage. 4.8 Joints. 4.9 Opening Protectives. 4.10 Penetrations. 4.11 Grade Plane. 4.12 Insulation and Siding.Chapter 5 High Challenge Fire Walls 5.1 Scope. 5.2 Structural Stability. 5.3 Cantilevered HC Fire Walls. Chapter 7 Fire Barrier Walls 7.1 Scope. 5.6 HC Fire Walls at Elevation Differences. 5.7 Clearance. 5.8 Opening Protectives. 5.9 Penetrations in HC Fire Walls. 5.10 Ducts and Air Transfer Openings. 5.11 High-Hazard Materials. 5.12 Parapets. 5.13 Roof Surface Protection. 5.14 Roof Structures. 5.15 Roof Penetrations. 5.16 Horizontal Continuity. Chapter 6 Fire Walls 6.1 Scope. 6.2 Structural Stability. 6.3 Cantilevered Fire Walls. 6.4 Tied Fire Walls. 6.5 Double Fire Walls. 6.6 Fire Wall Termination. 6.7 Fire Walls with Elevation Differences. 6.8 Clearance. 6.9 Horizontal Continuity. 6.10 Opening Protectives. Chapter 7 Fire Barrier Walls 7.1 Scope.7.2 Continuity.7.3 Opening Protectives. Annex A Explanatory Material Annex B Informational References

This standard specifies requirements for the design and construction of high challenge fire walls, fire walls, and fire barrier walls including protection of openings and penetrations.