Sec. 40-592. - Amendments to the International Mechanical Code.
The International Mechanical Code, is hereby amended, altered, modified and changed in the following respects:
Section 202 General Definitions. Add the following definitions:
AUTOMATIC. Automatic shall mean as a direct result of a sensing device or interlock with equipment process.
CONFINED SPACE. Any enclosed space that does not meet the space requirements for access and service as defined by this code.
ELECTRICAL CODE: The electrical code for this jurisdiction shall be Chapter 44 of the Omaha Municipal Code and all codes adopted therein.
EMBEDMENT. Any object entirely, or partially, concealed behind a finished construction surface that is not fully and readily accessible for service or repair.
FIRE CODE: The fire code for this jurisdiction shall be Chapter 46 of the Omaha Municipal Code and all codes adopted therein.
FUEL GAS CODE: The fuel gas code for this jurisdiction shall be NFPA 54 as adopted in Chapter 40 of the Omaha Municipal Code and the Metropolitan Utilities District Rules and Regulations.
ICC ELECTRICAL CODE: Wherever reference is made to the ICC Electrical Code it shall mean "Electrical Code". See definition for "Electrical Code".
INTERNATIONAL ENERGY CONSERVATION CODE: Wherever reference is made to the International Energy Conservation Code, it shall mean the International Energy Conservation Code as adopted and amended by this jurisdiction.
INTERNATIONAL FIRE CODE: Wherever reference is made to the International Fire Code it shall mean "Fire Code". See definition for "Fire Code".
INTERNATIONAL FUEL GAS CODE: Wherever reference is made to the International Fuel Gas Code it shall mean NFPA 54 as adopted in Chapter 40 of the Omaha Municipal Code and the Metropolitan Utilities District Rules and Regulations. See definition for "Fuel Gas Code".
INTERNATIONAL MECHANICAL CODE: Wherever reference is made to the "International Mechanical Code it shall mean Mechanical Code". See definition for "Mechanical Code".
INTERNATIONAL PLUMBING CODE: Wherever reference is made to the International Plumbing Code it shall mean "Plumbing Code". See definition for "Plumbing Code".
INTERNATIONAL PROPERTY MAINTENANCE CODE: Wherever reference is made to the International Property Maintenance Code it shall mean "Property Maintenance Code".
KITCHENETTE. A breakroom, or other similarly used room, which includes an exposed cooking surface (electric, gas or induction) that is not utilized for commercial purposes.
LICENSED CONTRACTOR. A holder of a valid master ACAD contractor license, a master ACAD contractor (residential) license for air conditioning/air distribution or a master steam/pipe fitting contractor as issued under the provisions of Chapter 40, Articles II & VII of the Omaha Municipal Code. For the purposes of this code, such license shall not be considered equivalent to a registered design professional as defined by the State of Nebraska Engineers and Architects Act.
MECHANICAL CODE: The mechanical code for this jurisdiction shall be Chapter 40 of the Omaha Municipal Code.
PLUMBING CODE: The plumbing code for this jurisdiction shall be Chapter 49 of the Omaha Municipal Code.
PORTABLE: An appliance, or equipment, which is not fixed in place. A portable appliance utilizes a cord and plug connection and, or has an integral fuel supply less than 250 gallons and is not an ASME pressurized vessel.
PROPERTY MAINTENANCE CODE: The property maintenance code for this jurisdiction shall be Chapter 48 of the Omaha Municipal Code and all codes adopted therein.
Add the following sentence to Section 307.2.1
Condensate shall not discharge to the exterior of a building, into a street, alley, walkway, sidewalk, deck, or grade.
Amend Section 307.2.1.1 to delete:
"Except where discharging to grade outdoors"
Amend Section 502.9.3 to read as follows:
Sec. 502.9.3 Cryogenics. Storage areas for stationary or portable containers of cryogenic fluids in any quantity shall be ventilated in accordance with Section 502.8, International Fire Code and NFPA 55. Indoor areas where cryogenic fluids in any quantity are dispensed shall provide independent emergency ventilation in accordance with the requirements of Section 502.8.4, International Fire Code and NFPA 55 in a manner that captures any vapor at the point of generation.
Exception:
Ventilation for indoor dispensing areas is not required where it can be demonstrated by a registered design professional that the cryogenic fluids do not create harmful vapors.
Amend Section 506.1 to read as follows:
506.1 General. Commercial kitchen hood ventilation ducts and exhaust equipment shall comply with the requirements of this section. Type I hoods shall comply with the requirements of NFPA 96 and this section. Commercial kitchen grease ducts shall be designed for the type of cooking appliance and hood served.
Amend the first sentence of Section 506.3.8 to read as follows:
Sec. 506.3.8 Grease duct cleanouts and openings. Grease duct cleanouts and openings shall comply with NFPA 96 and all of the following:
Amend section 507.1 to delete exceptions 1 & 2. Amend section 507.1 to renumber exceptions 3, 4, 5 and 6 as exceptions 1, 2, 3 and 4.
Add the following exception to Section 507.1.2
Exception:
Domestic cooking appliances not utilized for commercial purposes, and not installed in rooms with separate Type I or Type II hood systems, shall be permitted to be provided with a Type II exhaust hood with a factory-installed integrated fire suppression system in accordance with the manufacturer's installation instructions for the following commercial occupancies:
(1) High School Teaching Class Rooms
(2) Assisted Living Facility Training Kitchens
(3) Religious Assembly
(4) Rehabilitation Skilled Training Facilities, and
(5) Where approved by the code official.
Add Sec 507.3.5 Type II hoods. Occupancies and spaces containing residential cooking appliances that require Type II hoods with an integrated fire suppression system shall be designed to incorporate the requirements in NFPA 17A. Systems shall be certified to LC 1031, UL300A and UL 507 standards.
Add Sec. 507.3.6 Appliances and Ductwork. Residential appliances and the ductwork serving the hood system shall be installed in accordance with the manufacturer's specifications, applicable listings and the following requirements:
(1) Residential cooking appliances shall not exceed 36 inches in width.
(2) Only one residential cooking appliance and Type II hood system with an integrated fire suppression system is permitted per room.
(3) Exhaust ductwork shall be constructed of steel having a minimum thickness of 0.0220 inch (0.5550 mm) (No. 24 gage).
(4) Exhaust ductwork shall be constructed with continuous liquid tight joints, seams and penetrations.
(5) Exhaust duct termination shall comply with Section 506.4.2 for Type II hoods.
(6) Clearance between the cooking surface and the bottom of the hood shall meet manufacturer's requirements.
(7) A key-locked switch shall be provided to deactivate cooking appliances when staff members are not present. The switch shall be on an automatic timer to independently deactivate the cooking appliance and shall have a maximum capacity of 120 minutes, at which point the entire system will power down and require manual reset.
Amend Section 603.6.1.1 to read as follows:
603.6.1.1 Duct length. Flexible air ducts shall not be permitted except as final connectors to equipment or outlets.
Amend Section 603.6.2.1 to read as follows:
603.6.2.1 Connector length. Flexible air connectors shall be limited in length to 6 feet with no change in direction greater than 45 degrees.
Section 701.1 Scope. Revise the last sentence to read as follows:
The requirements for combustion and dilution air for gas-fired appliances shall be in accordance with the National Fuel Gas Code and NFPA 58.
Amend Section 906.1 to read as follows:
906.1 General. Factory-built barbecue appliances shall be of an approved type and shall be installed in accordance with the manufacturer's installation instructions, this chapter and Chapters 3, 5, 7, 8 the National Fuel Gas Code, NFPA and Metropolitan Utilities District Rules and Regulations.
Section 908.7 Refrigerants and hazardous fluids. Revise the last sentence to read as follows:
Heat exchange equipment containing heat transfer fluids which are flammable, combustible or hazardous shall comply with NFPA and the International Fire Code.
Section 916.1 General. Revise the first sentence to read as follows:
Sec. 916.1 General. Pool and spa heaters shall be installed in accordance with Chapter 49. Omaha Municipal Code, the Nebraska Boiler Act and the manufacturer's installation instructions.
Amend Section 926.1 to read as follows:
Sec. 926.1 Installation. The installation of gaseous hydrogen systems shall be in accordance with the applicable requirements of this code, the International Fire Code, the National Fuel Gas Code, NFPA, and the International Building Code.
Amend Section 1001.1 Scope to delete exceptions 1 through 8 in their entirety.
Amend Section 1002.1 to read as follows:
Sec. 1002.1 General. Potable water heaters and hot water storage tanks shall be listed and labeled and installed in accordance with the Nebraska Boiler Act, ASME Sections 4 or 8, the manufacturer's installation instructions, and this code. All water heaters shall be capable of being removed without first removing a permanent portion of the building structure or in-service mechanical equipment. The potable water connections and relief valves shall conform to the requirements of the Nebraska Boiler Act, ASME Sections 4 or 8. Domestic electric water heaters shall comply with the Nebraska Boiler Act, ASME Section 4, NFPA 70 and UL 174 or UL 1453. Commercial electric water heaters shall comply with the Nebraska Boiler Act, ASME Section 4, NFPA 70 and UL 1453. Domestic electric water heaters shall comply the Nebraska Boiler Act, ASME Section 4, NFPA 31 and 30 and UL 732.
Exception:
Listed and approved potable water heaters operating:
1) Under 200,000 Btu/hr input or,
2) Under 210 degrees F or,
3) Under 120 gallons.
Amend Section 1002.2 to read as follows:
See. 1002.2 Water heaters utilized for space heating. All vessels used for space heating will be constructed to the minimum standards of ASME. The vessel must bear an ASME "H" or "S" stamping.
Sec. 1002.3 Supplemental water-heating devices. Potable water-heating devices that utilize refrigerant-to-water heat exchangers shall be approved and installed in accordance with the Nebraska Boiler Act, ASME Sections 4 or 8, and the manufacturer's installation instructions. Amend Section 1003.1 to read as follows:
Amend Section 1003.1 to read as follows:
See. 1003.1 General. All pressure vessels shall bear the ASME Code stamping and be manufactured to the requirements of ASME Section 8 Divisions 1, 2, and 3 or Section 10, and shall be installed in accordance with the Nebraska e Boiler Act and the manufacturer's installation instructions.
Amend Section 1004.1 to ell add the following sentence:
Boilers shall be listed and labeled in accordance with the Nebraska Boiler Act, NFPA 30 and NFPA 31.
Amend Section 1004.2 to ell add the following sentence:
The installation of boilers shall conform to the Nebraska Boiler Act.
Section 1004.3 Working clearance. Revise the last sentence to read as follows:
Passageways around all sides of boilers shall have an unobstructed width of not less the than 36 inches (914 mm) unless otherwise approved by the Nebraska Boiler Act or allowed by the code official.
Amend Section 1005.1 ell to delete the exception in its entirety.
Amend Section 1006.6 to read as follows:
Sec. 1006.6 Safety and relief valves discharge. Safety and relief valve discharge pipes shall be of rigid pipe that is approved for the temperature of the system. The discharge pipe shall be the same diameter as the safety or relief valve outlet. Safety and relief valves shall not discharge so as to be a hazard, a potential cause of damage or otherwise a nuisance. High pressure-steam safety valves shall discharge to the outside of the structure. Where a low- pressure safety valve or a relief valve discharges to drainage system, the installation of said drainage system shall conform to the Omaha Plumbing Code.
Add Section 1006.9 to read as follows:
Sec. 1006.9 Safety and pressure relief valves and controls. All safety valves, safety relief valves, boiler safety devices, controls, and electrical requirements shall be listed and labeled for their appropriate use and conditions. The installation of all safety and pressure relief valves, and controls shall comply with the Nebraska Boiler Act, ASME Boiler and Pressure Code Sections: I, VI, VIII Div. 1, 2, 3, X, CSD-1, the authority having jurisdiction and the manufacturer's installation instructions.
Amend Section 1007.1 to read as follows:
Sec. 1007.1 General. All steam and hot water boilers shall be protected with a low-water cutoff control as required by the Nebraska Boiler Act, ASME Sections I, IV, and CSD-1.
Amend Condition 5 of Section 1104.2.2, to read as follows:
5. All electrical equipment and appliances conform to Class 1, Division 2, hazardous location classification requirements of NFPA 70 where the quantity of any Group A2, B2, A3 or B3 refrigerant, other than ammonia, in a single independent circuit would exceed 25 percent of the lower flammability limit (LFL) upon release to the space.
Amend Section 1109.2.5, exception 2 and add exception 4 to read as follows:
2. Piping in a direct refrigeration system using any refrigerant where the refrigerant quantity does not exceed the limits of Table 1103.1 for the smallest occupied space through which the piping passes.
4. Continuous refrigerant pipe or tube, including joints and connections, that have been tested in accordance with 2024 ASHRAE 15, 9.13 Refrigeration System Testing.
Amend Section 1202.4 to read as follows:
Sec. 1202.4 Piping materials and standards: Hydronic piping shall conform to the standards listed in Table 1202.4 and Table 1202.5 as amended by this section. The exterior of the pipe shall be protected from corrosion and degradation. Approved piping, valves, fittings and connections shall be installed in accordance with the installations instructions. Pipe and fittings shall be rated for use at the operating temperature and pressure of the hydronic system. Acrylonitrile butadiene styrene pipe, tubing, and fittings (ABS), Chlorinated poly vinyl chloride (CPVC) pipe, tubing and fittings, Cross-linked polyethylene (PEX) pipe, tubing and fittings, Cross-linked polyethylene/aluminum/ cross-linked polyethylene (PEX-AL-PEX) pipe, tubing and fittings, Polybutylene (PB) pipe, tubing and fittings, Polyethylene (PE) pipe, tubing and fittings, Polyethylene/aluminum/polyethylene (PE-AL-PE) pipe, tubing and fittings, Raised temperature polyethylene (PE-RT) pipe, tubing and fittings and Polypropylene (PP) pipe, tubing and fittings Polyvinyl chloride (PVC) pipe, tubing and fittings, will not be permitted for above ground use in a hydronic heating or cooling system except as otherwise acceptable to the code official. Hydronic piping and hydronic pipe fittings not listed in Table 1202.4, Table 1202.5 or in this section will be subject to approval by the code official and installed and tested per the requirements of Chapter 12 and the manufacturer's requirements.
Amend Section 1202.5 as follows:
Delete Section 1202.5 in its entirety (reference Section 1202.4)
Amend Section 1205.2 to read as follows:
Sec. 1205.2 Reduced pressure. A pressure relief valve shall be installed on the low-pressure side of a hydronic piping system that has been reduced in pressure. The relief valve shall be set at no greater than the lowest rated design pressure of any component installed downstream of the pressure reducing valve. The valve shall be installed in accordance with Section 1006.
Delete Chapter 13 in its entirety and replace with the following: Fuel Oil Piping and Storage:
Chapter 13: Fuel Oil Piping and Storage Systems
Sec. 1301.1 Scope. The design, installation, construction and repair of fuel oil piping and storage systems must comply with the requirements of NFPA 30, 30A, 31, and 37 State of Nebraska Title 159, Omaha Municipal Code, the International Fire Code and the International Building Code.
Chapter 15: Referenced Standards. Add the following standards:
NFPA (National Fire Protection Agency):
18 Wetting Agents —2017
18A Wetting Additives for Fire Control —2017
24 Private Fire Service Mains—2019
54 National Fuel Gas Code—2018
87 Fluid Heaters—2018
88A Parking Structures—2019
90A Installation of Air Conditioning and Ventilating Systems—2018
90B Installation of Warm Air Heating and Air Conditioning Systems—2018
220 Standards on Types of Building Construction—2018
329 Handling Releases of Flammable and Combustible Liquids and Gases—2015
490 Ammonium Nitrate, Storage of—2002
820 Fire Protection in Wastewater Treatment and Collection Plants—2016
Nebraska Boiler Act
Title 229 Ch 58 Pressure Vessels
(Ord. No. 38165, § 2, 7-15-08; Ord. No. 40299, § 1, 3-24-15; Ord. No. 41762, § 2, 3-12-19; Ord. No. 44671, § 28, 5-5-26)
