Discharge densities are defined by which standard?

Discharge densities are defined by which standard?

• A. NFPA 25
• B. NFPA 13R
• C. NFPA 70
• D. NFPA 13

Answer: (D)

Discharge density is a design parameter used in sizing water-based sprinkler systems. It describes how much water, per square foot, must be discharged over the design area to control a fire. The standard that defines this concept and provides the hydraulic design procedure for sprinkler systems is NFPA 13. It sets the required densities for different hazard categories and ties those densities to design area, sprinkler spacing, and water supply. NFPA 13R covers low-rise residential systems with its own criteria, but it still relies on NFPA 13 for the hydraulic design details. NFPA 25 and NFPA 70 address maintenance and electrical installations, respectively, and do not define discharge density.

Discharge density is a design parameter used in sizing water-based sprinkler systems. It describes how much water, per square foot, must be discharged over the design area to control a fire. The standard that defines this concept and provides the hydraulic design procedure for sprinkler systems is NFPA 13. It sets the required densities for different hazard categories and ties those densities to design area, sprinkler spacing, and water supply. NFPA 13R covers low-rise residential systems with its own criteria, but it still relies on NFPA 13 for the hydraulic design details. NFPA 25 and NFPA 70 address maintenance and electrical installations, respectively, and do not define discharge density.