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NOTE: This is an unformatted excerpt from our online fire protection training library.

Hydraulic Calculations

Special Design Approaches

Special Areas

If a building chute is the area under consideration, and the chute is serviced by a separate sprinkler riser, three (3) sprinklers in the chute have to be calculated to flow at least fifteen (15) psi each.

When any area will be protected by a single row of sprinklers, the design areaThis is not meant to be applied to corridors, but some authorities may want to use this as the most stringent application, even in corridors. must include all sprinklers on the line, up to a maximum of seven (7).

In duct work, all sprinklers must be calculated as flowing in the entire duct.  Each is calculated as flowingIf standard 1/2-inch orifice sprinklers are used, the flow is equal to 5.6, the k-factor for a 1/2-inch sprinkler, multiplied by the square root of 7 psi. This means that each sprinkler flows 5.6 times 2.65, or 15 gpm. at a nozzle pressure of seven (7) psi minimum.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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