Minnesota Legislature
Office of the Revisor of Statutes
Minnesota Administrative Rules
1305.0905 [F] SECTION 905, STANDPIPE SYSTEMS.
Subpart 1.
[F] Section 905.2.
IBC [F] Section 905.2 is amended by adding a subsection to read as follows:
905.2.1 Modification to standards. In buildings other than high rise that are protected throughout by an automatic sprinkler system installed in accordance with Sections 903.3.1.1 and 903.3.1.2, a Class I or III standpipe system need only meet the pressure requirements for the sprinkler system when such systems comply with Sections 905.2.1.1 through 905.2.1.5:
905.2.1.1 Municipal water supply. A municipal water supply capable of supplying the required standpipe flow rate with a residual pressure not less than 20 psi (1.4 bars) through a fire hydrant shall be provided. A fire hydrant shall be located within 300 feet (91 m) of the building's fire department connection.
905.2.1.2 System testing and pipe size. The standpipe system shall be able to provide the pressure and flow rate required by NFPA 14 when the standpipe system is supported by local fire department apparatus through the fire department connection as verified with hydraulic calculations. The hydraulic calculations are to be performed between the hydraulically most demanding standpipe hose connection and the fire department connection. Pipe sizes shall not be less than the minimum requirements in NFPA 14.
905.2.1.3 Design pressure. A maximum design pressure of 150 psi (10.3 bars) is permitted at the fire department connection when the standpipe is supported by local fire department apparatus.
905.2.1.4 Hose connection. At least one 2-1/2 inch (64 mm) hose connection shall be provided on the exterior of the building at the fire department connection for each 250 gpm (980 L/min) of required standpipe flow.
905.2.1.5 Automatic sprinkler system demand. The automatic sprinkler system demand, including the inside hose stream demand from NFPA 13, is to be provided by the municipal water supply system without requiring fire department pumping into the system.
Subp. 2.
[F] Section 905.3.2.
IBC [F] Section 905.3.2 is amended by adding a section to read as follows:
905.3.2.1 Group A exhibition. Class III automatic standpipes shall be provided in Group A-3 Occupancies where the floor area used for exhibition exceeds 12,000 square feet (1115 m2).
Subp. 3.
[F] Section 905.3.4.
IBC [F] Sections 905.3.4 and 905.3.4.1 are amended by deleting the sections in their entirety.
Subp. 6.
[F] Section 905.3.8.
IBC [F] Section 905.3 is amended by adding a subsection to read as follows:
905.3.8 Detention and correctional facilities. Regardless of the height of the building or number of stories, every building in a Group I-3 detention and correctional facility, where 50 or more persons are under restraint or security under Occupancy Condition 3, 4 or 5, shall be provided with a Class III automatic wet or semiautomatic dry standpipe system.
Exception: Combined systems meeting the provisions of Section 905.2 may be used.
When acceptable to the fire chief, fire department connections may be located inside all security walls or fences on the property.
Standpipes shall be located in accordance with Section 905. In addition, standpipes shall be located so that it will not be necessary to extend hose lines through smoke barriers. When located in cell complexes, standpipes may be located in secured pipe chases.
Subp. 6a.
[F] Section 905.3.9.
IBC [F] Section 905.3 is amended by adding a subsection to read as follows:
905.3.9 Group R-2 occupancies. Class III wet standpipes shall be installed in Group R-2 occupancies three or more stories in height where any portion of the building's interior area is more than 200 feet (60,960 mm) of travel, vertically or horizontally, from the nearest point of fire department vehicle access. Standpipes required by this section shall be installed in enclosed stairways.
History:
27 SR 1474; 32 SR 7; L 2007 c 140 art 4 s 61; art 13 s 4; L 2008 c 337 s 64
Published Electronically:
February 23, 2009
Official Publication of the State of Minnesota
Revisor of Statutes