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eng.fire-suppression-system Calculator
Calculates fire suppression system design flow rate, pipe sizing, and sprinkler head spacing from hazard occupancy classification. NFPA 13 requires minimum discharge density of 0.1 gpm/ft² for light hazard to 0.4 gpm/ft² for extra hazard occupancies.
Inputs
Area M2
Two-dimensional surface extent (m²). For complex shapes, break into simpler sub-shapes and sum.
Hazard Class
Reference formula or conversion factor shown for context.
Sprinkler Area M2
Two-dimensional surface extent (m²). For complex shapes, break into simpler sub-shapes and sum.
Design Density Mm Min
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Results
sprinkler heads needed
Sample size or count used in the calculation.
design demand (L/min)
Sample size or count used in the calculation.
hose allowance (L/min)
Sample size or count used in the calculation.
total system demand (L/min)
The combined total across all inputs and components.
hazard class
The classification assigned based on the computed value.