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NFPA 13 density / area curves

Design density and area of operation by hazard group for NFPA 13 control-mode systems (density/area method).

Hazard groupDensity (gpm/ft²)Density (mm/min)Area (ft²)Area (m²)
Light0.14.11500139
Ordinary 10.156.11500139
Ordinary 20.28.21500139
Extra 10.312.22500232
Extra 20.416.32500232

Hinweise

  • Area reduces by 40% for ESFR and CMSA systems with quick-response heads (per NFPA 13 §11.2.3.2).
  • Hose stream allowance: 100 gpm (LH), 250 gpm (OH), 500 gpm (EH).

Quelle

NFPA 13 (2022) Figure 19.2.3.1.1 + Chapter 19.

Cite this page
APA
FireTwin AI (2026). NFPA 13 density / area curves. FireTwin AI. https://firetwin.eu/de/data/nfpa13-density-area
IEEE
FireTwin AI, "NFPA 13 density / area curves," FireTwin AI, 2026. [Online]. Available: https://firetwin.eu/de/data/nfpa13-density-area

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