Fire Protection Worked Examples

Worked examples for sprinkler demand, fire pump head, hose hydrant demand, water tanks, and clean agent estimates.

Sprinkler Density & Coverage Planner

Sample inputs: density: 8.1; designArea: 230; coverage: 12; hose: 950; duration: 60; margin: 10

  • Estimated sprinkler count: 20 heads
  • Sprinkler flow demand: 1,863 L/min
  • Total demand with hose and margin: 3,094 L/min
  • Required fire water volume: 278.49 m³

Plan around 3,094 L/min total flow and 278.49 m³ water volume for this preliminary scenario.

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Fire Pump Sizing Calculator

Sample inputs: sprinkler: 1850; hose: 950; hydrant: 0; elevation: 18; residual: 4.5; pipeLoss: 1.2

  • Total pump flow: 3,080 L/min
  • Total pump flow: 814 GPM
  • Estimated pump head: 76.14 m
  • Estimated pump pressure: 7.46 bar

Use approximately 3,080 L/min at 76.14 m head for preliminary fire pump planning.

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Fire Hose Reel / Hydrant Demand Tool

Sample inputs: reels: 4; reelFlow: 100; hydrants: 2; hydrantFlow: 500; simultaneous: 75; duration: 60

  • Base connected fire flow: 1,400 L/min
  • Simultaneous demand: 1,050 L/min
  • Demand in GPM: 277 GPM
  • Required water volume: 94.50 m³

Use 1,050 L/min as the preliminary simultaneous hose/hydrant demand.

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Fire Water Tank Capacity Calculator

Sample inputs: sprinkler: 1850; hose: 950; hydrant: 0; duration: 60; usable: 90; refill: 150

  • Total fire demand: 2,800 L/min
  • Gross demand volume: 252.00 m³
  • Refill contribution: 13.50 m³
  • Required usable storage: 238.50 m³

Provide approximately 265.00 m³ gross tank capacity based on entered usable volume and refill assumptions.

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FM200 / Clean Agent Quantity Estimator

Sample inputs: length: 8; width: 6; height: 3.2; factor: 0.72; reserve: 10; cylinder: 45

  • Protected room volume: 153.60 m³
  • Base agent quantity: 110.59 kg
  • Total with reserve: 121.65 kg
  • Cylinder capacity entered: 45.00 kg

Plan approximately 121.65 kg of agent, or 3 cylinders based on the entered cylinder size.

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