Minnesota Mh ilMechanical CdC ode Chapter 1346

1 Minnesota Minnesota M h i lC d Mechanical code Chapter 1346. p 1. Major changes in the MN amendments to the IMC. d h None Clerical change: Most changes involved the deletion of an Most changes involved the deletion of an amendment because the change has been incorporated into the 06. incorporated into the 06 IMC. IMC. MN Rule Clerical Change Clerical Change 2000 Editorial change for 2006. publishing date bli hi d Chapters 2 to 15 of the 2000 edition of Chapters 2 to 15 of the 2006 edition of the International Mechanical code the International Mechanical code , the International Mechanical code the International Mechanical code , promulgated by the International code promulgated by the International code Council, Inc., 5203 Leesburg Pike, Suite Council, Inc., 5203 Leesburg Pike, Suite 600, Falls Church, Virginia 22041 3401, 600, Falls Church, Virginia 22041 3401, are incorporated by reference as part of p y p are incorporated by reference as part of p y p the Minnesota Mechanical code with the the Minnesota Mechanical code as amendments in this Chapter .

2 As used in amended in this Chapter . Portions of this this Chapter , "IMC" means the Chapter reproduce text and tables from International Mechanical code the International Mechanical code . The i incorporated in this part. t d i thi t I t International Mechanical code is ti lM h i lC d i copyright 2006 by the International code Council, Inc. All rights reserved. As used Editorial change for in this Chapter , "IMC" means the copyright clarity copyright clarity International Mechanical code International Mechanical code incorporated in this part. 3. MN Rule Deletion Change Deletion Change GENERAL DEFINITIONS. 2000 2006. ATMOSPHERICALLY VENTED GAS OR (Amendment has been OIL APPLIANCE. incorporated into the 2006 COMMERCIAL KITCHEN HOODS. COMMERCIAL KITCHEN HOODS. IMC). Backshelf hood. A backshelf hood is .. Double island canopy hood. A double island canopy hood is.

3 Eyebrow hood. An eyebrow hood is .. Single island canopy hood. Single island canopy hood A A. single island canopy hood is .. Wall canopy hood. A wall canopy exhaust hood is .. 4. MN Rule D l i Ch Deletion Change GENERAL. 2000 2006. IMC Section is IMC Section is amended to read as amended to read as amended to read as amended to read as follows: follows: Opening location. Opening location. Intake openings. Intake openings. Exhaust Exhaust openings openings. openings openings. Venting system Venting system terminations. terminations. 5. End Things Design Professionals Miss . IMC Alterations to trusses. IMC Alterations to trusses. Truss members and components shall not be Truss members and components shall not be cut, drilled, notched, spliced or otherwise altered in anyway without written altered in anyway without written concurrence and approval of a registered design professional design professional.

4 IMC Alterations to trusses. l .Alterations resulting in the addition of loads Alterations resulting in the addition of loads to any member ( , HVAC equipment, water heaters) shall not be permitted without heaters) shall not be permitted without verification that the truss is capable of supporting such additional loading supporting such additional loading. IMC IMC Equipment Equipment and appliances shall be installed as and appliances shall be installed as required by the terms of their approval, .the manufacturer'ss installation instructions . manufacturer installation instructions Manufacturer's installation instructions shall be available on the job site at the time of be available on the job site at the time of inspection. 11. IMC HEATING AND COOLING LOAD CALCULATIONS. Heating and cooling system design loads for the Heating and cooling system design loads for the purpose of sizing systems, appliances and equipment shall be determined in accordance with the procedures described in the ASHRAE Handbook of procedures described in the ASHRAE Handbook of Fundamentals.

5 Heating and cooling loads shall be adjusted to account for load reductions that are achieved when energy recovery systems are utilized in hi d h t tili d i the HVAC system in accordance with the ASHRAE Handbook HVAC Systems and Equipment. Alternatively, design loads shall be determined by an approved equivalent computation procedure, using the design parameters specified in Chapter 3 of the design parameters specified in Chapter 3 of the International Energy Conservation code . Commercial Energy code Load Calculations d l l Must calculate heating and cooling system design loads g g y g Must base calculations on generally accepted engineering standards and handbooks Outdoor design conditions are specified at Locations not listed shall use those of the listed city with geographical proximity and similar climate conditions as approved by the building official. 13.

6 MN rule Chapter 1322 Changing Design Conditions Summer Db/Wb F Winter Db F. City 1999 2006 1999 2006. Albert Lea 87/72 85/72 17 15. Alexandria 88/72 86/70 22 21. Bemidji 85/69 84/68 31 24. Brainerd 87/71 86/71 20 20. Duluth 82/68 81/67 21. 21 20. 20. Faribault 88/72 86/73 17 16. Fergus Falls 88/72 86/71 21 21. Virginia 83/72 25 . International Falls 83/68 83/67 29 28. Mankato 88/72 86/72 17 15. Minneapolis/St. Paul 89/73 88/72 16 15. Rochester 87/72 85/72 17 17. St. Cloud 88/72 86/71 15 20. Willmar 88/72 85/71 15. 15 20. 20. Winona 88/73 88/74 14 13. 14. Changing Design Conditions SSummer Db/Wb Db/Wb F Winter Db F. Wi t Db F. City 1999 2006 1999 2006. Aitkin 82/72 24. Cloquet q 82/68. / 20. Crookston 84/70 27. Ely 82/68 29. Eveleth 82/68 26. Hibbingg 82/68 19. Montevideo 86/72 17. Mora 84/70 21. Morris 84/72 21. New Ulm 87/73 15. Owatonna 86/73 16. Pequot Lake 84/68 23.

7 Pipestone 85/73 15. Redwood Falls 89/73 17. Roseau 82/70 29. Thief River 82/68 25. Tofte 75/61 14. Warroad 83/67 29. Wheaton 84/71 20. Worthington 84/71 14. 15. Outdoor air required d d The The minimum ventilation rate of required minimum ventilation rate of required outdoor air shall be determined in accordance with the Ventilation Rate Procedure Section with the Ventilation Rate Procedure, Section of ASHRAE 2004, or the Indoor Air Quality Procedure Section 6 3 of ASHRAE Quality Procedure, Section of ASHRAE. 2004. IMC Electrical requirements. l l A receptacle outlet shall be provided at or p p near the equipment location in accordance with the ICC Electrical code . Access and Service space d Sloped roofs Where appliances, equipment, fans, are installed on a roof having a slope of three units vertical in 12 units horizontal . or greater more than 30 inches above grade a level platform shall be provided on each side (where) access is required shall be provided on each side.

8 (where) access is required for service, repair, or maintenance. The platform shall be at least 30 inches in any dimension and shall be provided with guards. The guards shall extend at least 42 inches above the platform, prevent the passage of a 21 inch diameter sphere l f h f 21 i h di h and shall comply with the loading requirements for guards specified in the International Building code 18. Sloped Roofs 3) The Platform shall be level and be at least 30 inches (both dimensions) where 4)) Guards > 42 inches service, repair, or maintenance is required and no greater than 21. inches apart and shall have loading requirements per 2006. IBC. 2) Edge Ed > 30 inches i h above b grade d 1)) Roof slope p >. 3/12. 19. (. (TYPE 2) KITCHEN HOODS. ). Type II hoods shall be installed where cooking or dishwashing appliances produce heat, steam, or products of combustion and do li d h t t d t f b ti dd not produce grease or smoke, such as steamers, kettles, pasta cookers, and dishwashing machines.

9 Exceptions: 1. Under counter type commercial dishwashing machines. 2. A Type II hood is not required for dishwashers and potwashers that are provided with heat and water vapor exhaust or recovery that are provided with heat and water vapor exhaust or recovery systems that are supplied by the appliance manufacturer and are installed in accordance with the manufacturer's instructions. The additional heat and moisture loads generated by such appliances shall be accounted for in the design of the HVAC system The shall be accounted for in the design of the HVAC system. The HVAC system shall maintain a maximum relative humidity of 65 percent in the space. (. (TYPE 2) KITCHEN HOODS. ) (cont). Exceptions: 3. A single light duty electric convection, bread, retherm, or microwave oven that are rated at kW or less. The additional heat and moisture loads generated by such appliances shall be accounted for in the design of the HVAC system The HVAC.

10 Accounted for in the design of the HVAC system. The HVAC system shall maintain a maximum relative humidity of 65 percent in the space. 4. A Type II hood is not required for the following electrically heated appliances: toasters, steam tables, popcorn poppers, hot dog cookers, coffee makers, rice cookers, egg cookers, and holding/warming ovens that are rated at kW or less. The additional heat and moisture loads generated by such appliances additional heat and moisture loads generated by such appliances shall be accounted for in the design of the HVAC system. The HVAC system shall maintain a maximum relative humidity of 65 percent in the space. Kitchen relative humidity no greater than 65%! 22. Piping in Plenums. l Piping carrying flammable or combustible gases or liquids in a plenum must have all connections made by welding or brazing. No flanges, valves, threaded fittings, unions, or connectors are permitted.