Minnesota Administrative Rules
Agency 171 - Public Safety Department
Chapter 7511 - FIRE CODE
Part 7511.0507 - SECTION 507, FIRE PROTECTION WATER SUPPLIES
Universal Citation: MN Rules 7511.0507
Current through Register Vol. 48, No. 39, March 25, 2024
Subpart 1. IFC section 507.3.
IFC section 507.3 is amended and sections added to read:
507.3
Fire flow. Fire flow
requirements for buildings or portions of buildings and facilities shall be
determined by an approved method. If no municipal water supply exists, the
minimum water flow and duration requirements for new buildings, portions of
buildings hereafter constructed, or buildings moved into or within the
jurisdiction shall be as specified in Table 507.3.
507.3.1
Fire flow for Group R-3 or
Group U occupancies. No minimum fire flows are required for Group R-3
occupancies or Group U occupancies with less than 5,000 square feet of floor
area (465 m2).
TABLE 507.3
MINIMUM FIRE FLOW REQUIREMENTS
| Hazard Classification [Note 1] | Sprinklered Building [Note 2] | Unsprinklered or partially sprinklered building | Duration (minutes) |
| Light Hazard | 100 gpm available for fire department use | 250 gpm available for fire department use | 30 |
| Ordinary Hazard | 250 gpm available for fire department use | 500 gpm available for fire department use | 60 |
| Extra Hazard | 500 gpm available for fire department use | 750 gpm available for fire department use | 90 |
| High Piled Combustible Storage | Hose stream demand from sprinkler installation standard (NFPA 13) or 500 gpm, whichever is larger | 1,000 gpm available for fire department use | 120 |
| Other Group H Occupancies | Hose stream demand from sprinkler installation standard (NFPA 13, MSFC Chapter 57, etc.) or 500 gpm, whichever is larger | 1,000 gpm available for fire department use | 120 |
[Note 1: Light, ordinary, and extra hazard are as defined in NFPA 13, Standard for the Installation of Automatic Sprinkler Systems.]
[Note 2: In sprinklered buildings, when a fixed water supply is used for the sprinklers, the hose stream available for fire department need not come from the fixed source (i.e. tank).]
Subp. 2. IFC section 507.5.1.
IFC section 507.5.1 is amended to read:
507.5.1
Where required. Where a
portion of the facility or building hereafter constructed or moved into or
within the jurisdiction is more than 300 feet (91.5 m) from a hydrant on a fire
apparatus access road, as measured by an approved route around the exterior of
the facility or building, on-site fire hydrants and mains shall be provided
where required by the fire code official.
Exceptions:
1. For Group R-3 and Group U occupancies, the
distance requirement shall be 400 feet (122 m).
2. For buildings equipped throughout with an
approved automatic sprinkler system installed in accordance with Section
903.3.1.1 or 903.3.1.2, the threshold for requiring on site fire hydrants and
mains shall be increased to 400 feet (122 m).
3. For Group R-3 buildings equipped
throughout with an automatic sprinkler system installed in accordance with
Section 903.3.1.1, 903.3.1.2, or 903.3.1.3, the threshold for requiring on site
fire hydrants and mains shall be increased to 600 feet (183 m).
Statutory Authority: MS s 299F.011; 326B.02
Disclaimer: These regulations may not be the most recent version. Minnesota may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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