CODES

ADOPTS WITH AMENDMENTS:

International Mechanical Code 2012 (IMC 2012)

1346.0050 TITLE;
INCORPORATION BY REFERENCE

Parts 1346.0050 to 1346.1500 are known and may be cited as the “Minnesota Mechanical Code.

Chapters 2 to 15 of the 2012 edition of the International Mechanical Code (IMC), promulgated by the International Code Council, Inc., Washington, DC, are incorporated by reference as part of the Minnesota Mechanical Code except as qualified by the applicable provisions in Minnesota Rules, Chapter 1300, and as amended in this chapter. Portions of this chapter reproduce excerpts from the 2012 IMC, International Code Council, Inc., Washington, DC, copyright 2012, reproduced with permission, all rights reserved.

The IMC is not subject to frequent change and a copy of the IMC with amendments for use in Minnesota is available in the office of the commissioner of labor and industry.

Chapters 1 to 10 and 12 to 15 of the 2014 edition of NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, promulgated by the National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471, are incorporated by reference as part of the Minnesota Mechanical Code as amended in this chapter. As used in this code, “NFPA 96” means the NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations chapters that are incorporated into this code. Portions of this chapter reproduce text and tables from the NFPA 96. The NFPA 96 is copyrighted, 2014, by the National Fire Protection Association. All rights reserved.

The NFPA 96 is not subject to frequent change and a copy of the NFPA 96, with amendments for use in Minnesota, is available in the office of the commissioner of labor and industry.

1346.0060
REFERENCES TO OTHER
INTERNATIONAL CODE COUNCIL (ICC) CODES

Subpart 1. General.
References to other codes and standards promulgated by the International Code Council in the IMC and IFGC are modified in subparts 2 to 11.
Subp. 2. Building code.
References to the International Building Code mean the Minnesota Building Code, Minnesota Rules, Chapter 1305, adopted pursuant to Minnesota Statutes, Section 326B.106, subdivision 1.
Subp. 3. Residential code.
References to the International Residential Code mean the Minnesota Residential Code, Minnesota Rules, Chapter 1309, adopted pursuant to Minnesota Statutes, Section 326B.106, subdivision 1.
Subp. 4. Electrical code.
References to the International Code Council Electrical Code mean the Minnesota Electrical Code, Minnesota Rules, Chapter 1315, adopted pursuant to Minnesota Statutes, Section 326B.35.
Subp. 5. Fuel gas code.
References to the International Fuel Gas Code mean the Minnesota Fuel Gas Code, Minnesota Rules, parts 1346.5050 to 1346.6014, adopted pursuant to Minnesota Statutes, Section 326B.106, subdivision 1.
Subp. 6.
(Repealed)
Subp. 7. Plumbing code.
References to the International Plumbing Code mean the Minnesota Plumbing Code, Minnesota Rules, Chapter 4715, adopted pursuant to Minnesota Statutes, Section 326B.106, subdivisions 1 and 2.
Subp. 8. Private sewage disposal code.
References to the International Private Sewage Disposal Code mean the Minnesota Pollution Control Agency’s minimum standards and criteria for individual sewage treatment systems Minnesota Rules, Chapter 7080, adopted pursuant to Minnesota Statutes, Chapters 103F, 103G, 115, and 116.
Subp. 9. Energy conservation code.
References to the International Energy Conservation Code mean the Minnesota Residential Energy Code, Minnesota Rules, Chapter 1322, and the Minnesota Commercial Energy Code, Minnesota Rules, Chapter 1323, adopted pursuant to Minnesota Statutes, Section 326B.115.
Subp. 10. Property maintenance code.
References to the International Property Maintenance Code are deleted.
Subp. 11. Fire code.
References to the International Fire Code mean the Minnesota State Fire Code, Minnesota Rules, Chapter 7511, adopted pursuant to Minnesota Statutes, Chapter 299F.

1346.0101
SCOPE

This code shall regulate the design, installation, maintenance, alteration, and inspection of mechanical systems that are permanently installed and utilized to provide control of environmental conditions and related processes within buildings. Fuel gas piping systems, fuel gas utilization equipment and appliances, and related accessories shall be regulated by parts 1346.5050 through 1346.6000.

This code shall also regulate those mechanical systems, system components, equipment, and appliances specifically addressed in the IMC as amended in this chapter. This code shall also regulate process piping installed within, or in conjunction with, buildings or structures. For the purposes of this section, the term “process piping” includes piping or tubing which conveys gas, liquid, or fluidized solids and which is used directly in research, laboratory, or production processes. Process piping and tubing shall be installed in accordance with ASME B31.3, Process Piping Code, or ASME B31.9, Building Services Piping, as applicable. Refer to Minnesota Rules, Chapter 1300, for additional administrative provisions of the Minnesota State Building Code. Refer to Minnesota Statutes, Section 13.7911, for data classification of biotechnology process piping systems.

1346.0102
EXISTING INSTALLATIONS

Except as otherwise provided for in this chapter, a provision in this code shall not require the removal, alteration, or abandonment of, nor prevent the continued utilization and maintenance of, a mechanical system lawfully in existence at the time of the adoption of this code.

1346.0103
MAINTENANCE

Mechanical systems, both existing and new, and parts of those systems, shall be maintained in proper operating condition in accordance with the original design and in a safe and sanitary condition. Devices or safeguards which are required by this code shall be maintained in compliance with the code edition under which they were installed. The owner or the owner’s designated agent shall be responsible for maintenance of mechanical systems. To determine compliance with this provision, the building official shall have the authority to require a mechanical system to be reinspected.

1346.0104
ADDITIONS, ALTERATIONS,
RENOVATIONS, OR REPAIRS

Additions, alterations, renovations, or repairs to a mechanical system shall conform to this code for a new mechanical system without requiring the remainder of the existing mechanical system to comply with all of the requirements of this code. Additions, alterations, renovations, or repairs shall not cause an existing mechanical system to become unsafe, hazardous, or overloaded.

1346.0105
WORK EXEMPT FROM PERMIT

Work performed under this code shall be exempted from a permit in accordance with Minnesota Rules, Chapter 1300.

1346.0106
REQUIRED INSPECTIONS

The building official, upon notification from the permit holder or the permit holder’s agent, shall make the following inspections and other such inspections as necessary, and shall either release that portion of the construction or shall notify the permit holder or the permit holder’s agent of violations that must be corrected. The holder of the permit shall be responsible for the scheduling of these inspections.

1. Underground inspection shall be made after trenches or ditches are excavated and bedded, piping installed, and before backfill is put in place. When excavated soil contains rocks, broken concrete, frozen chunks, and other rubble that would damage or break the piping or cause corrosive action, clean backfill shall be used.

2. Rough-in inspection shall be made after the roof, framing, fireblocking, and bracing are in place and all ducting and other components to be concealed are complete, and prior to the installation of wall or ceiling membranes.

3. Final inspection shall be made upon completion of the mechanical system.

Exception: Ground-source heat pump loop systems tested in accordance with this code shall be permitted to be backfilled prior to inspection.

1346.0107
(REPEALED)

1346.0108
AUTHORITY TO CONDEMN
MECHANICAL SYSTEMS

Whenever the building official determines that any mechanical system or portion of a system regulated by this code has become hazardous to life, health, or property, or has become unsanitary, the building official shall issue an order in writing to the building’s owner or owner’s agent. This order shall require that the system either be removed or restored to a safe condition. A time limit for compliance with the building official’s order shall be specified in the written order. A person shall not use or maintain a defective mechanical system after receiving a notice under this section.

When a mechanical system is to be disconnected, written notice shall be given to the building’s owner or owner’s agent in accordance with Minnesota Rules, Chapter 1300. In cases of immediate danger to life or property, the disconnection shall be made immediately without notice.

1346.0109
AUTHORITY TO ORDER DISCONNECTION
OF ENERGY SOURCES

The building official shall have the authority to order disconnection of energy sources supplied to a building, structure, or mechanical system regulated by this code, when it is determined that the mechanical system or any portion of the system has become hazardous or unsafe. Written notice of an order to disconnect service and the causes of the order shall be given within 24 hours to the owner and occupant of the building, structure, or premises, provided, however, that in cases of immediate danger to life or property, the disconnection shall be made immediately without notice. Where energy sources are provided by a public utility, the building official shall immediately notify the serving utility in writing of the issuance of an order to disconnect.

1346.0110
CONNECTION AFTER ORDER TO DISCONNECT

A person shall not make energy source connections to mechanical systems regulated by this code which have been:

1. disconnected; or

2. ordered to be disconnected by the building official; or

3. the use of which has been ordered to be discontinued by the building official until the building official authorizes the reconnection and use of such mechanical systems.

When a mechanical system is maintained in violation of this code, and in violation of a notice issued pursuant to this part, the building official shall institute appropriate action to prevent, restrain, correct, or abate the violation.

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