Shall Indicate a mandatory
Should Indicate a Recommendation or Advised
A building where the floor of an occupiable story is greater than 75ft (23m) above the lowest level of fire department vehicle access.
- The building in the above figure is 84ft but Rooftop is not occupiable (rooftop free). the occupiable story is 72ft (22m) so, this building is not a high-rise.
- If rooftop is occupiable, Building is a high-rise
- If high rise require Sprinkler system
Classes of Standpipe Systems
Section 5.3.1 Class I Systems
A Class I standpipe system shall provide 2.5 in. (65 mm) hose connections to supply water for use by fire departments and those trained in handling heavy fire streams.
Section 18.104.22.168 Class II Systems
A Class II standpipe system shall provide 1.5 in. (40 mm) hose stations to supply water for use by trained personnel or a hose connection for the fire department during initial response.
Section 5.3.3 Class III Systems
A Class III standpipe system shall provide 1.5 in. (40 mm) hose stations to supply water for use by trained personnel and 2.5 in. (65 mm) hose connections to supply a larger volume of water for use by fire departments and those trained in handling heavy fire streams.
Number of Standpipes
Separate standpipes shall be provided in each required exit stairway
Minimum Sizes for Standpipes
Class I and Class III standpipes shall be at least 4 in. (100 mm) in size.
Standpipes that are part of a combined system shall be at least 6 in. (150 mm) in size.
Locations of Hose Connections
Hose connections shall be located so that there is at least 3 in. (76.2 mm) clearance between any adjacent object and the handle of the valve when the valve is in any position ranging from fully open to fully closed
Hose connections and hose stations shall be unobstructed and shall be located not less than 3 ft (0.9m) or more than 5ft (1,5m) above the floor
22.214.171.124* Each hose connection provide for use by trained personnel (Class II and Class III systems) shall be equipped with not more than 100ft (30.5m) of listed 1.5in. (40mm), lined, collapsible or noncollapsible fire hose attached and ready for use.
4.6.4 Nozzles provided for class II service shall be listed
4.6.5* Label. Each rack or storage facility for 1.5in. (40mm) or smaller hose shall be provided with a label that includes the wording “FIRE HOSE FOR USE BY TRAINED PERSONNEL” and Operating instructions.
4.7.1 Hose valves shall be listed.
Min & Max Pressure Limits
A minimum residual pressure of 100 psi (6.9 bar) at the outlet of the hydraulically most remote 2.5in. (65 mm) hose connection and 65 psi (4.5 bar) at the outlet of the hydraulically most remote 1.5 in. (40 mm) hose station.
The maximum flow rate shall be 1000 GPM (3785 L/min) for buildings that are sprinklered throughout, in accordance with NFPA 13, Standard for the Installation of Sprinkler Systems, and 1250 GPM (4731 L/min) for buildings that are not sprinklered throughout, in accordance with NFPA 13.
Section 126.96.36.199.1 For Class I and Class III systems
The minimum flow rate for the hydraulically most remote standpipe shall be 500 gpm (1893 L/min), through the two most remote 2.5 in. (65 mm) outlets, and the calculation procedure shall be in accordance with 188.8.131.52.
Section 7.10.2 Class II Systems
184.108.40.206.1 For Class II systems, the minimum flow rate for the hydraulically most remote hose connection shall be 100 gpm (379 L/min).
Section 7.10.3 Maximum Flow Rate for Individual Connections
220.127.116.11 The maximum flow required from a 2.5 in. (65 mm) hose connection shall be 250 gpm (946 L/min).
18.104.22.168 The maximum flow required from a 1.5 in. (40 mm) hose connection shall be 100 gpm (379 L/min).
Fire department connections (FDC) shall be located not more than 100 ft (30.5 m) from the nearest fire hydrant connected to an approved water supply.
Fire department connections shall be visible and recognizable from the street or nearest point of fire department apparatus accessibility or on the street side of buildings.
Fire department connections shall be located not less than 18 in. (457 mm) not more than 48 in. (1219 mm) above the level of the adjoining ground, sidewalk, or grade surface.