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1. Charter
2. Title 1 General Administration
3. Title 2 Government Organization
4. Title 3 Revenue and Taxation
5. Title 4 Licenses and Permits
6. Title 5 General Offenses
7. Title 6 Health, Safety, and Sanitation
8. Title 7 Regulation of Vehicles, Pedestrians, and Parking
9. Title 8 Parks, Open Space, Streets, and Public Ways
10. Title 9 Land Use Regulation
11. Title 10 Structures
1. Chapter 10-1 Definitions
2. Chapter 10-2 Housing Code
3. Chapter 10-2.5 Abatement of Public Nuisances
4. Chapter 10-3 Rental Licenses
5. Chapter 10-4 Condominium Conversions
6. Chapter 10-5 Building Code
7. Chapter 10-5.5 Residential Building Code
8. Chapter 10-6 Electrical Code
9. Chapter 10-7 Energy Conservation and Insulation Code
10. Chapter 10-7.5 Green Building and Green Points Program
11. Chapter 10-8 Fire Prevention Code
12. »Chapter 10-9 Mechanical Code
13. Chapter 10-9.5 Fuel Gas Code
14. Chapter 10-10 Plumbing Code
15. Chapter 10-11 Signs on Private Property
16. Chapter 10-12 Mobile Homes
17. Chapter 10-13 Historic Preservation
12. Title 11 Utilities and Airport
13. Title 12 Human Rights
14. Title 13 Elections and Campaign Disclosures and Activities
15. Title 14 Arts
16. Index
17. Ordinances Pending Codification

Page Contents

• 10-9-1 Legislative Intent
• 10-9-2 Adoption of the International Mechanical Code With Modifications
• 10-9-3 Mechanical Permit Fees

Chapter 10-9: Mechanical Code³³

10-9-1 Legislative Intent.

The purpose of this chapter is to protect the public health and safety by regulating the installation, alteration, and repair of heating, ventilating, cooling, and refrigeration devices in structures in the city. The city council hereby adopts the 2006 edition of the International Mechanical Code with certain amendments and deletions thereto found to be in the best interests of the residents of the city.

Ordinance Nos. 4984 (1986); 5177 (1989); 5493 (1992); 5781 (1996); 7566 (2007)

10-9-2 Adoption of the International Mechanical Code With Modifications.

(a) The 2006 edition of the International Mechanical Code, including appendices A thereto of the International Code Council, is hereby adopted by reference as the Mechanical Code of the City of Boulder or mechanical code and has the same force and effect as though fully set forth in this chapter, except as specifically amended by the provisions of this chapter.

(b) Except as specified below, Chapter 1 is repealed. This code shall be administered in accordance with Chapter 1, "Administration," of the International Building Code as adopted, with amendments, by Section 10-5-2, "Adoption Of International Building Code with Modifications," B.R.C. 1981.

(1) Section 101.2, "Scope," is adopted as an administrative provision.

(2) Section 101.2.1, "Appendices," is adopted as an administrative provision. Appendix A is adopted as a part of this code.

(3) Section 101.3, "Intent," is adopted as an administrative provision.

(c) Section 301.7, "Electrical," is repealed and reenacted to read:

301.7 Electrical. Electrical wiring, controls and connections to equipment and appliances regulated by this code shall be in accordance with Chapter 10-6, "Electrical Code," B.R.C. 1981.

(d) Section 306.5 "Equipment and appliances on roofs or elevated structures," is repealed and reenacted to read:

306.5 Equipment and appliances on roofs or elevated structures. Where equipment and appliances requiring access are installed on roofs or elevated structures at a height exceeding 16 feet (4877 mm), such access shall be provided by a permanent approved means of access. The means of access shall start at no more than 8 feet (2438 mm) above finished grade or floor level and continue unobstructed to the equipment and appliances level service space.

(e) 306.6 Rooftop equipment support and clearances.

(1) Mechanical equipment placed, replaced, or resting over roofing shall be supported by curbs or legs which shall be flashed to the roofing and made watertight. Mechanical equipment shall include, but not be limited to, heating equipment, cooling and refrigeration equipment, ventilating fans, blowers, and other similar devices located on the roof.

(2) Flat roofs. On roofs having a pitch of less than 2 in 12, mechanical equipment shall be supported on a solid curb greater in size than the equipment which it serves. Curbs can be manufactured or built-in-place. If built-in-place, the curb shall be covered with metal of at least 26 gauge. All seams and miter corners of the metal shall be riveted and soldered so as to be weathertight. The curb shall be a minimum of 9 inches above the finished roof.

(A) Ducts less than four feet in width shall have at least twelve inches clearance from the finished roof surface to the bottom of the duct.

(B) Ducts between four feet and eight feet in width shall have at least twenty-four inches clearance from the finished roof surface to the bottom of the duct.

(C) Ducts over eight feet in width shall have at least thirty-six inches clearance from the finished roof surface to the bottom of the duct.

(3) Pitched Roofs. On roofs having a slope over a 2 and 12, mechanical equipment may be set on legs which provide a minimum of 11 inches clearance between the finished roof surface and the equipment frame.

(f) Section 603.6.1.1, "Duct length," is repealed and reenacted to read:

603.6.1.1 Duct length. Approved Class 0 and Class 1 flexible air duct shall not exceed seven feet in length.

(g) Section 603.6.2.1, "Connector length," is modified to read limited in length to 7 feet (2134 mm).

(h) Section 606.3, "Installation," is amended by the addition of a new sentence to read:

Smoke detectors must be capable of being tested from a remote and readily accessible location.

Ordinance Nos. 4984 (1986); 5177 (1989); 5493 (1992); 5781 (1996); 7566 (2007)

10-9-3 Mechanical Permit Fees.

Mechanical permit fees are those prescribed by Subsection 4-20-13(c), B.R.C. 1981.

Ordinance Nos. 4984 (1986); 5493 (1992); 5781 (1996); 7566 (2007)

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³³ Adopted by Ordinance No. 4636. Amended by Ordinance Nos. 6015, 7304. Derived from Ordinance Nos. 4327, 4502, 4548.

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