ORDINANCE NO. 8166
AN ORDINANCE OF THE CITY OF LAWRENCE, KANSAS REPEALING ARTICLE 6 OF CHAPTER V OF THE CITY CODE OF LAWRENCE, KANSAS, 2006 EDITION AND AMENDMENTS THERETO, AND ADOPTING THE INTERNATIONAL MECHANICAL CODE, 2006 EDITION, AND EXCEPTING, AMENDING AND MODIFYING CERTAIN OF ITS PORTIONS.
BE IT ORDAINED BY THE GOVERNING BODY OF THE CITY OF LAWRENCE, KANSAS:
Section 1. Article 6 of Chapter V of the Code of the City of Lawrence, Kansas, 2006 Edition and amendments thereto, is hereby repealed.
Section 2. Article 6 of Chapter V of the Code of the City of Lawrence, Kansas, 2006 Edition and amendments thereto, is enacted to read as follows, the intent being to replace the current provisions:
ARTICLE 6. MECHANICAL CODE
5-601 MECHANICAL CODE INCORPORATED.
The International Mechanical Code, 2006 Edition, published by the International Code Council, is hereby adopted by reference as if it were fully set out in this article, except for those portions that are hereinafter deleted, modified or amended.
5-602 SAME.
Not less than one copy of the International Mechanical Code, 2006 Edition, marked or stamped in the manner provided by K.S.A. 12-3010, with all sections or portions thereof intended to be omitted clearly marked and showing portions that are amended and to which shall be attached a copy of the amendments, shall be filed with the City Clerk and shall be open to inspection and available to the public at reasonable business hours. Official copies of such Code shall be supplied at the cost of the City to the officials and agencies in the manner listed and set forth in K.S.A. 12-3010. Subsequent references to the "International Mechanical Code" or "Standard Code" shall mean the "International Mechanical Code, 2006 Edition" as adopted herein.
5-603 SEVERABILITY.
If any section, clause, sentence, or phrase of this ordinance is found to be unconstitutional or is otherwise held invalid by any court of competent jurisdiction, it shall not affect the validity of any remaining parts of this ordinance.
5-604 Amendments Made to the International Mechanical Code, 2006 Edition
The International Mechanical Code, 2006 Edition is amended or changed as follows. The amendment of any section shall not serve to amend or repeal any other discretely numbered provision of the code, whether or not such provision is considered a section or subsection, unless that section or subsection is specifically referenced in the ordinance.
5-604.1 A100 Appendix Chapter A Combustion Air Openings and Chimney Connector Pass-Throughs contained within the International Mechanical Code is hereby specifically adopted.
5-604.2 Chapter 1 of the International Mechanical Code, entitled Administration, is hereby deleted.
5-605.1 SECTION 303.3 of the International Mechanical Code is amended to read as follows:
303.3 Prohibited locations. Fuel-fired appliances shall not be located in, or obtain combustion air from, any of the following rooms or spaces:
(A) Sleeping rooms.
(B) Bathrooms.
(C) Toilet rooms.
(D) Storage closets.
(E) Surgical rooms.
(F) Hot tub rooms.
Exception: This section shall not apply to the following appliances:
(A) Direct-vent appliances that obtain all combustion air directly from the outdoors.
(B) Solid fuel-fired appliances provided that the room is not a confined space and the building is not of unusually tight construction.
(C) Appliances installed in a dedicated enclosure in which all combustion air is taken directly from the outdoors, in accordance with Section 703. Access to such enclosure shall be through a solid door, weather-stripped in accordance with the exterior door air leakage requirements of the International Energy Conservation Code and equipped with an approved self-closing device.
5-606 Section 401.1 of the International Mechanical Code is amended to read as follows:
401.1 Scope. This chapter shall govern the ventilation of spaces within a building intended to be occupied. This chapter does not govern the requirements for smoke control systems.
401.1.1 Standards. Conformance with the current ASHRAE 62 standard shall be allowed in lieu of the ventilation requirements of Chapter 4.
5-607 Section 504.6 of the International Mechanical Code and the indicated subsections are amended to read as follows:
504.6 Domestic clothes dryer ducts. Exhaust ducts for domestic clothes dryers shall be constructed of metal and shall have a smooth interior finish. The exhaust duct shall be a minimum nominal size of 4 inches (102 mm) in diameter. The entire exhaust system shall be supported and secured in place. The male end of the duct at overlapped duct joints shall extend in the direction of airflow. Clothes dryer transition ducts used to connect the appliance to the exhaust duct system shall be limited to single lengths not to exceed 8 feet (2438 mm) and shall be listed and labeled for the application. Transition ducts shall not be concealed within construction.
504.6.1 Maximum length. The maximum length of a clothes dryer exhaust duct shall not exceed 25 feet (7620 mm) from the dryer location to the outlet terminal. The maximum length of the duct shall be reduced 2½ feet (762 mm) for each 45 degree (0.79 rad) bend and 5 feet (1524 mm) for each 90 degree (1.6 rad) bend. The maximum length of the exhaust duct does not include the transition duct.
Exception: Where the make and model of the clothes dryer to be
installed is known and the manufacturer’s installation instructions for such
dryer are provided to the code official, the maximum length of the exhaust
duct, including any transition duct, shall be permitted to be in accordance with
the dryer manufacturer’s installation instructions.
5-608.1 Section [B] 601.2 of the International Mechanical Code and the indicated subsections are amended to read as follows:
[B] 601.2 Air movement in egress elements. Corridors shall not serve as supply, return, exhaust, relief or ventilation air ducts.
Exceptions:
(A) Use of a corridor as a source of makeup air for exhaust systems in rooms that open directly onto such corridors, including toilet rooms, bathrooms, dressing rooms, smoking lounges and janitor closets, shall be permitted, provided that each such corridor is directly supplied with outdoor air at a rate greater than the rate of makeup air taken from the corridor.
(B) Where located within a dwelling unit, the use of corridors for conveying return air shall not be prohibited.
(C)
Where located
within tenant spaces of 1,000 square feet (93 m2) or less in area, utilization
of corridors for conveying return air is permitted.
[B] 601.2.1 Corridor ceiling. Use of the space between the corridor ceiling and the floor or roof structure above as a return air plenum is permitted for one or more of the following conditions:
(A) The corridor is not required to be of fire-resistance-rated construction;
(B) The corridor is separated from the plenum by fire-resistance-rated construction;
(C) The air-handling system serving the corridor is shut down upon activation of the air-handling unit smoke detectors required by this code;
(D) The air-handling system serving the corridor is shut down upon detection of sprinkler waterflow where the building is equipped throughout with an automatic sprinkler system; or
(E) The space between the corridor ceiling and the floor or roof structure above the corridor is used as a component of an approved engineered smoke control system.
5-608.2 Table 603.4 of the International Mechanical Code is amended to read as follows:
TABLE 603.4
DUCT CONSTRUCTION MINIMUM SHEET METAL
THICKNESSES FOR SINGLE DWELLING UNITS
|
DUCT SIZE |
GALVANIZED |
APPROXIMATE ALUMINUM B&S GAGE |
|
|
Minimum thickness (inches) |
Equivalent galvanized gage no. |
||
|
Round ducts 14” or less Over 14” |
0.013 0.016 |
30 28 |
26 24 |
|
All rectangular ducts 14” or less Over 14” |
0.016 0.019 |
28 26 |
24 22 |
5-608.3 Section 603.5 of the International Mechanical Code and the indicated subsections are amended to read as follows:
603.5 Nonmetallic ducts. Nonmetallic ducts shall be constructed with Class 0 or Class
1 duct material in accordance with UL 181. Fibrous duct construction shall
conform to the SMACNA Fibrous Glass Duct Construction Standards or NAIMA
Fibrous Glass Duct Construction Standards. The maximum air temperature
within nonmetallic ducts shall not exceed 250ºF (121ºC).
603.5.1 Gypsum ducts. The use of gypsum boards to form air shafts (ducts) shall be limited to return air systems where the air temperatures do not exceed 125ºF (52ºC) and the gypsum board surface temperature is maintained above the airstream dew-point temperature. Air ducts formed by gypsum boards shall not be incorporated in air-handling systems utilizing evaporative coolers.
603.5.2 Prohibited. Rigid fibrous glass duct shall be prohibited.
Exception: Rigid Fibrous duct is permitted in R occupancies provided the duct is readily accessible for repair or cleaning.
5-608.4 Section 603.6 of the International Mechanical Code and the indicated subsections are amended to read as follows:
603.6 Flexible air ducts and
flexible air connectors. Flexible air ducts, both metallic and nonmetallic, shall
comply with Sections 603.6.1, 603.6.1.1, 603.6.3 and 603.6.4. Flexible air
connectors, both metallic and nonmetallic, shall comply with Sections 603.6.2
through 603.6.4.
603.6.1 Flexible air ducts. Flexible air ducts, both metallic and nonmetallic, shall be tested in accordance with UL 181. Such ducts shall be listed and labeled as Class 0 or Class 1 flexible air ducts and shall be installed in accordance with Section 304.1.
603.6.1.1 Duct
length. Flexible
air ducts shall not be limited in length to 15 feet.
603.6.2 Flexible air connectors. Flexible air connectors are not
permitted, both metallic and nonmetallic, shall be tested in accordance
with UL 181. Such connectors shall be listed and labeled as Class 0 or Class 1
flexible air connectors and shall be installed in accordance with Section 304.1.
603.6.2.1 Connector length. Flexible air connectors shall be
limited in length to 14 feet (4267 mm).
603.6.2.2 Connector penetration
limitations.
Flexible air connectors shall not pass through any wall, floor or ceiling.
603.6.3 Air temperature. The design temperature of air to be conveyed in flexible air ducts and flexible air connectors shall be less than 250ºF (121ºC).
603.6.4 Flexible air duct and
air connector clearance. Flexible air ducts and air connectors shall be
installed with a minimum clearance to an appliance as specified in the
appliance manufacturer’s installation instructions.
5-608.5 Section 603.8 of the International Mechanical Code and the indicated subsections are amended to read as follows:
603.8 Underground ducts. Ducts shall be approved for
underground installation. Metallic Underground ducts not having an
approved protective coating shall be completely encased in a minimum of 2
inches (51 mm) of concrete.
603.8.1 Slope. Ducts shall slope to allow drainage to a point provided with access.
603.8.2 Sealing. Ducts shall be sealed and secured prior to pouring the concrete encasement.
603.8.3 Plastic ducts and fittings. Plastic ducts shall be constructed of PVC having a minimum pipe stiffness of 8 psi (55 kPa) at 5-percent deflection when tested in accordance with ASTM D 2412. Plastic duct fittings shall be constructed of either PVC or high-density polyethylene. Plastic duct and fittings shall be utilized in underground installations only. The maximum design temperature for systems utilizing plastic duct and fittings shall be 150EF (66EC). Corridors shall not be used to convey air to or from rooms if the corridor is required to be of fire-resistive construction per the Building Code.
5-608.6 Section [B] 607.4 of the International Mechanical Code is amended to read as follows:
[B] 607.4 Access and
identification.
Fire and smoke dampers shall be provided with an approved means of access. To
permit inspection and maintenance of the damper and its operating parts there
shall be minimum 144 square inches access, when duct is less than 12” wide,
duct shall be equipped with a removable section of duct for access. Ceiling
access must have minimum 18”x18” access opening with unobstructed access to
duct access large enough. The access shall not affect the integrity
of fire-resistance-rated assemblies. The access openings shall not reduce the
fire-resistance rating of the assembly. Access points shall be permanently
identified on the exterior by a label having letters not less than 0.5 inch
(12.7 mm) in height reading: FIRE/SMOKE DAMPER, SMOKE DAMPER or FIRE DAMPER. Access
doors in ducts shall be tight fitting and suitable for the required duct
construction.
5-609.1 Section 1003.3 of the International Mechanical Code is amended to read as follows:
1003.3 Welding. Welding on pressure vessels shall be
performed by approved certified welders in compliance with
nationally recognized standards.
5-609.2 Section 1004.6 of the International Mechanical Code and the indicated subsections are amended to read as follows:
1004.6 Boiler rooms and enclosures. Boiler rooms and enclosures and access thereto shall comply with the International Building Code and Chapter 3 of this code. Boiler rooms shall be equipped with a floor drain or other approved means for disposing of liquid waste.
1004.6.1 Emergency Shutoff. Any Boiler, whether for building heat or domestic hot water that is 200,000 BTU and above shall have an emergency shut off located outside the boiler room. The switch must be labeled with a red tag and white letters that reads “EMERGENCY BOILER SHUT OFF”.
Exception: When approved by the State Boiler Inspector, the switch may be located inside the boiler room.
Section 3. This ordinance shall be in full force and take effect on January 1, 2008 and after its publication as provided by law.
Passed by the Governing Body this ____ day of _____________, 2007.
Sue Hack, Mayor
ATTEST:
Frank S. Reeb, City Clerk
Approved as to form and legality:
Toni Ramirez Wheeler, Director of Legal Services