Minnesota Administrative Rules

1346.0404 SECTION 404 GARAGES.

Subpart 1.

Section 404.1.

IMC section 404.1 is amended to read as follows:

404.1 Enclosed parking garages. Mechanical ventilation systems for enclosed parking garages shall operate automatically upon detection of certain gas concentrations. Enclosed parking garages shall be equipped with a carbon monoxide (CO) detector and a nitrogen dioxide (NO₂) detector. The mechanical ventilation system shall activate upon detection of a CO level of 25 parts per million (ppm) or greater, a NO₂ level of 3 ppm or greater, or both. Such detectors shall be listed in accordance with UL 2075 and installed in accordance with their listing and manufacturers' instructions.

Subp. 2.

Section 404.2.

IMC section 404.2 is amended to read as follows:

404.2 Occupied spaces accessory to public garages. Connecting offices, waiting rooms, ticket booths, elevator lobbies, and similar uses that are accessory to a public garage shall be maintained at a positive pressure and shall be provided with ventilation in accordance with IMC section 403.3.

Subp. 3.

Section 404.3.

IMC section 404 is amended by adding a subsection 404.3 to read as follows:

404.3 Minimum exhaust. The mechanical ventilation system shall be capable of producing a minimum exhaust rate of 0.75 cfm per square foot (0.0038 m³/s·m²) of floor area.

Subp. 4.

Section 404.4.

IMC Section 404.4 is amended by adding a section to read as follows:

404.4 Prohibition of heated commercial parking garages. Commercial parking garages shall comply with the Minnesota Commercial Energy Code, chapter 1323.

Statutory Authority:

MS s 16B.59; 16B.61; 16B.64; 326B.02; 326B.101; 326B.106; 326B.13

History:

15 SR 71; 29 SR 299; L 2007 c 140 art 4 s 61; art 13 s 4; 34 SR 537; 39 SR 690; 44 SR 1085

Published Electronically:

April 22, 2020