With respect to hydrant Fire Flows for High-rise buildings that are sprinklered to NFPA 13.
I have researched a Multiple of standards NFPA 13,14,24,1142,and 101 in an attempt to locate recommended hydrant flows for high-rise buildings . Currently I’m attempting to gain access to SFPE Code Official’s Guide to Performance-Based Design Review that is referenced in a number of the standards.
The following are excerpts from NFPA standards.
3.3.16 Municipal-Type Water System. A system having water pipes servicing fire hydrants and designed to furnish, over and above domestic consumption, a minimum of 250 gpm (950 L/min) at 20 psi (138 kPa) residual pressure for a 2-hour duration. [1141, 2012]
Which in this case I don’t believe 1142 would not be appropriate standard.
Nfpa 14 has a higher level of water flow requirements:
Nfpa 14 10.1.3.2 For a combined system in a building equipped with
partial automatic sprinkler protection, the flow rate required
by 7.10.1 shall be increased by an amount equal to the hydraulically
calculated sprinkler demand or 150 gpm (568 L/min) for
light hazard occupancies, or by 500 gpm (1893 L/min) for
ordinary hazard occupancies, whichever is less
7.10.3 Maximum Flow Rates for Individual Connections.
184.108.40.206 The maximum flow required from a 21∕2 in. (65 mm)
hose connection shall be 250 gpm (946 L/min).
220.127.116.11 The maximum flow required from a 11∕2 in. (40 mm)
hose connection shall be 100 gpm (379 L/min).
7.10.4 Sprinkler System Hose Demand. Sprinkler system hose
demand in fully sprinklered buildings shall not be required to
be added to standpipe calculations
The British Columbia building code has a minimum residual pressure of 690 kpa or 100 PSI in standpipes but no GPM .
Our Municipal standard for fire flows is as follows:
FIRE FLOW DEMANDS
Fire flows shall be based on the publication "Water Supply for Public Fire Protection - A
Guide to Recommended Practice 1999" published by Fire Underwriters Survey except
that the minimum acceptable fire flows shall be:
Zone Required Fire Flow
Residential except Compact Lot Residential 60 l/s 900 usgpm
Suburban Residential 60 l/s 900 usgpm
Multiple Family, Compact Lot Residential, Comprehensive 90 l/s 1380 usgpm
Commercial & Institutional 150 l/s 2340 usgpm
Industrial 225 l/s 3540 usgpm
Maximum allowable pressure 1035 kPa 150 psi
Minimum pressure at Peak Hour Demand 300 kPa 43 psi
Minimum pressure anywhere in system during design 150 kPa 21 psi
Fire Flow and Peak Day Demand
Could you provide some guidance for hydrant flows for high rise occupancies from an NFPA perspective.