WebThe NFA fire flow formula is: Required fire flow (gpm) = (Length x Width) ÷ 3. Using the same example, an IC arrives at a burning mercantile occupancy that measures 50 feet by 75 feet and is one story (12 feet) tall. The IC quickly determines that the area of the structure is 3,750 square feet. Using this number and the NFA formula, the ...
Nozzle Reaction - Fire Apparatus: Fire trucks, fire engines, …
WebGPM = 29.7 x D² x √NP (Smooth Bore Nozzle) Gallons per minute = 29.7 x (diameter)² x √ nozzle pressure RULE OF EIGHT’S FOR SMOOTH BORE MASTER STREAMS This … WebGPM. Notes: Projected available flows calculated at 20 psi residual, or ½ the static pressure for low pressure hydrants having static pressures of less than 40 psi. This calculator is … fwl medical
K-factor (fire protection) - Wikipedia
WebMar 13, 2024 · Using the hand method, for each 100-foot length of 1¾-inch hose flowing 200 gpm, the friction loss is 48 psi: 2 x 4 x 6 = 48 psi. For a 3-inch supply line flowing 300 gpm, the friction loss per ... WebJun 1, 1996 · 50% involvement = 200 gpm 25% involvement = 100 gpm. The quick-calculation formula indicates that if the dwelling were fully involved, it would require 400 … WebFeb 1, 2010 · The NFA formula is based on offensive interior operations where less than 50 percent of the building is involved. The formula is: Needed fire flow = [(length x width) … glam shack aiea