NFPA 1142:2022

Chapter 1 Administration 1.1 Scope. 1.2 Purpose. 1.3 Application. 1.4 Equivalency. 1.5 Alternatives. 1.6 Modifications. 1.7 Units and Formulas. 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 Calculating Minimum Water Supplies 4.1 General. 4.2 Structures Without Exposure Hazards. 4.3 Structures with Exposure Hazards. 4.4 Structures with Automatic Sprinkler Protection. 4.5 Structures with Other Automatic Fire Suppression Systems. 4.6 Water Delivery Rate to the Fire Scene. 4.7 Other Uses. Chapter 5 Classification of Occupancy Hazard 5.1 General. 5.2 Occupancy Hazard Classification Number. Chapter 6 Classification of Construction 6.1 General. 6.2 Construction Classification Number. 6.3 Classification of Types of Building Construction. Chapter 7 Water Supply 7.1 Approved Water Supply. 7.2 Water Use Agreements. 7.3 Identifying Water Sources. 7.4 Fire Hose Connections. 7.5 Access to Water Sources. 7.6 Mobile Water Supply Training. 7.7 Records. Chapter 8 Dry Hydrants 8.1 ChapterScope. 8.2 Planning and Permits. 8.3 Dry Hydrant Design. 8.4 Dry Hydrant Locations. 8.5 Strainer Clearance. 8.6 Installation Procedure for Dry Hydrant System. 8.7 Inspection, Testing, and Maintenance of Dry Hydrants. 8.8 Records for Dry Hydrants. Annex A Explanatory Material Annex B Alternative Water Supply Annex C Mobile Water Supply Apparatus Annex D Large-Diameter Hose Annex E Portable Pumps Annex F Automatic Sprinkler Protection Annex G Municipal-Type Water System Annex H Calculating Minimum Water Supplies Annex I Dry Hydrant Design Annex J Geospatial Support for Water Supply Planning Annex K Informational References

This standard identifies a method of determining the minimum requirements for alternative water supplies for struc‐ tural firefighting purposes in areas where the authority having jurisdiction (AHJ) determines that adequate and reliable water supply systems for firefighting purposes do not otherwise exist.