Series 103 2002 ORDINANCES/RESOLUTIONS
Section 103-590; Ord. 17501; Repealing Article VI of Chapter 6 RE: CABO One and Two Family Dwelling Code of 1995; Enacting New Article VI Adopting International Residential Code for One and Two Family Dwellings of 2000
Ordinance No. 17501 Council
Bill No. B 369-02
repealing Article VI of Chapter 6 of the City Code relating to the CABO One and Two Family
Dwelling Code of 1995 and enacting in lieu thereof a new Article VI adopting the International
Residential Code for One- and Two-Family Dwellings of 2000; and fixing the time when this
ordinance shall become effective.
BE IT ORDAINED BY THE COUNCIL OF THE CITY OF COLUMBIA, MISSOURI, AS
SECTION 1. Article VI of Chapter 6 of the Code of Ordinances, City of
relating to the CABO One and Two Family Dwelling Code of 1995 is hereby repealed and in
lieu thereof a new Article VI, relating to the International Residential Code for One- and Two-Family
Dwellings of 2000, is hereby enacted reading in words and figures as follows:
CHAPTER 6. BUILDINGS AND BUILDING REGULATIONS
Article VI. INTERNATIONAL RESIDENTIAL CODE FOR ONE AND TWO FAMILY
Sec. 6-65. Adopted.
The 2000 Edition of the International Residential Code for One- and Two-Family
published by The International Code Council, Inc. including Appendices E, G and H, three
copies of which have been on file with the city clerk for a period of ninety (90) days prior to the
adoption of this article, is hereby adopted by reference and made a part of the Code of
Ordinances, City of Columbia, Missouri as fully as if set forth in its entirety. At least three
copies of the International Residential Code for One- and Two-Family Dwellings, 2000 Edition
shall remain on file in the office of the city clerk and shall be kept available for public use,
inspection and examination.
Sec. 6-66. Amendments.
The code adopted by this article is hereby amended by substituting the following
lieu of these sections with corresponding numbers in the code, or, where there is no
corresponding section in the code, the following sections shall be enacted as additions to the
R101.1 Title: These provisions shall be known as the Residential Code for One- and Two-Family
Dwellings of the City of Columbia, and shall be cited as such and will be referred to herein as
R103.1 Creation of enforcement agency: (Delete)
R103.2 General: The building official is hereby authorized and directed to administer and
enforce all provisions of this code. The building official shall be the director of public works.
R104.10.1 Areas prone to flooding. (Delete)
R105.2, No. 2.: Fences not over twelve (12) feet high.
R112.1 General: Any aggrieved person shall have the right to appeal a decision of the code
official to the building construction codes commission. Applications for appeal shall be
accordance with the procedures set out in Section 112.0 of the International Building Code of
2000 as amended by section 6-17 of the Code of Ordinances. Applications must be filed within
twenty (20) days of the decision of the code official.
R112.2.1 Determination of substantial improvements in areas prone to flood: (Delete)
R112.2.2 Criteria for issuance of a variance for areas prone to flooding: (Delete)
R112.3 Qualifications: (Delete)
R113.4 Violation penalties: Any person who shall violate a provision of this code or shall fail to
comply with any of the requirements thereof, shall be guilty of a misdemeanor and upon
conviction thereof, shall be punished by a fine of not more than one thousand dollars ($1,000.00)
or by imprisonment not exceeding one year, or by both such fine and imprisonment. Each day
that a violation continues shall be deemed a separate offense.
Table 301.2a - The following values shall be inserted in the appropriate spaces:
Roof Snow Load - 20; Wind - 90; Seismic Condition - 1; Weathering - Yes, Severe; Frost Line
Depth - Yes, 30 inches; Termite - Moderate to Heavy; Decay - Slight to Moderate; Winter
Design Temp - +4 Degrees F; Flood Hazards
R307.3 Water Closet: All water closets shall be spaced fifteen (15) inches from the centerline of
the fixture to any wall or plumbing fixture.
R309.2 Separation required: The garage shall be completely separated from the residence
its attic area by means of 5/8-inch gypsum board or equivalent applied to the garage side
R314.2 Treads and risers: The maximum riser height shall be 8 1/4 inches and the minimum
tread depth shall be 9 inches. The riser height shall be measured vertically between leading
edges of the adjacent treads. The tread depth shall be measured horizontally between the vertical
planes of the foremost projection of adjacent treads and at a right angle to the treads leading
edge. The walking surface of treads and landings of a stairway shall be sloped no steeper than
one unit vertical in 48 units horizontal (2-percent slope). The greatest riser height within any
flight of stairs shall not exceed the smallest by more than 3/8 inch (9.5mm).
R314.4 Winders: Winders are permitted, provided that the width of the tread
at a point not
more than 12 inches (305mm) from the side where the treads are narrower is not less than 9
inches and the minimum width of any tread is not less than 6 inches (153 mm). The continuous
handrail required by Section 315.1 shall be located on the side where the tread is narrower.
R314.6 Circular stairways: Circular stairways shall have a minimum tread depth and
maximum riser height in accordance with Section 314.2 and the smaller radius shall not be less
than twice the width of the stairway. The minimum tread depth of 9 inches shall be measured
from the narrower end.
R317.2 Power source: In new construction, required smoke detectors shall receive their primary
power from the building wiring when such wiring is served from a commercial source. In
addition to the required primary power source, required smoke detectors shall receive power
from a battery when the primary power source is interrupted. Smoke detectors may be battery
operated when installed in existing buildings, or in buildings without commercial power, or in
buildings which undergo alterations, repairs or additions regulated by Section R317.1.1.
Exception #1 All buildings shall be insulated in accordance with the following: ceiling or roof
R-38; exterior wall-- R-15.5; floor above unheated area or crawl space and ducts shall have a
value of R-19 for the assembly; finished exterior basement walls and interior garage walls shall
have insulating batts, blankets, fills or similar types of materials with a value of R-13.
Exception # 2 Joints in the building conditioned envelope that are sources of air leakage,
as around window and door frames, between wall cavities and window or door frames, between
wall assemblies or their sill plates and foundations, between utility service penetrations through
the building envelope, shall be properly sealed with compatible and durable caulking, gasketing,
weatherstripping or other materials in an approved manner.
Exception # 3: Exception #3: All exterior walls shall have a vapor barrier, capable of reducing
vapor transmission to less than 1 perm, installed on the inside or the warm surface side of the
insulated wall or ceiling. Only those ceilings that are attached directly to the underside of
roof rafters, such as flat roofs or cathedral ceilings, are required to install the vapor barrier.
Exception #4: Ducts in heated areas.
Exception #5: Ducts in unheated areas and not exposed to outside ventilation, such as a garage,
shall have an insulation value of R-4.
Exception #6: All windows shall have a maximum Thermal Transmittance (U) value of 0.55.
P2602.1.1 Individual water supply. Where a potable public water supply is not available,
individual sources of potable water supply shall be utilized.
P2602.1.2 Availability. A potable public water supply system shall be considered available to
building when the nearest property line is located within two hundred twenty-five (225) feet of
the public water main.
P2603.2.1 Protection against physical damage: Delete
P2603.6 Freezing: A water, soil or waste pipe shall not be installed outside of a building, or
concealed in outside walls or in any place subjected to freezing temperature, unless adequate
provision is made to protect such pipe from freezing by insulation or heat or both. Water pipes
shall not be installed in an exterior wall cavity in one and two family dwellings. For purposes
this section exterior wall cavity shall mean all walls that rain can fall upon. Water service piping
shall be installed below recorded frost penetration but not less than thirty (30) inches below
P2603.7 Sewer depth: Building sewers that connect to private sewage disposal systems shall be
a minimum of thirty (30) inches below finished grade at the point of septic tank connection.
Building sewers shall be a minimum of thirty (30) inches below grade.
P2604.3 Backfilling: Delete last sentence from section which reads, Loose earth shall be
carefully placed in the trench in 6-inch (152 mm) layers and tamped in place.
P2903.5 Water hammer: Delete
P3003.3.6.1 Solvent cementing. Joint surfaces shall be clean and free from moisture. A primer
that conforms to ASTM F 656 shall be applied. Solvent cement not purple in color and
conforming to ASTM D 2564, CSA CAN/CSAB137.3, CSA CAN/CSAB181.2 or CSA
CAN/CSAB182.1 shall be applied to all joint surfaces. The joint shall be made while the cement
is wet and shall be in accordance with ASTM D 2855. Solventcement joints shall be applied to
all joint surfaces. The joint shall be permitted above or below ground.
P3008.1 General: Deleted
P3114.6.1 Air admittance valve maximum load limitations for horizontal fixture branches
NOMINAL PIPE SIZE (inches) D.F.U.
1 1/4 1
1 1/2 3
* Not more than two water closets or bathroom groups per interval.
E3508.1.1: Add: Exception: When a concrete-encased electrode and/or a ground ring are
available for use in a grounding electrode system a made or other electrode as specified in
E3508.2 can be used as a substitute. The second made electrode shall not be connected in
with the first made electrode.
E3509.6.1 Water Heater Jumper: The interior metal water piping bonding shall include a bonding
jumper between the hot and cold waterlines at the water heater fixture.
E3509.7 Metal gas piping bonding: Delete
AG105.2 Outdoor swimming pool: An outdoor swimming pool, including an in-ground,
aboveground or on-ground pool, hot tub or spa shall be provided with a barrier which shall
comply with the following:
1. The top of the barrier shall be at least seventy-two
(72) inches (1836 mm) above finished
ground level measured on the side of the barrier which faces away from the swimming pool. The
maximum vertical clearance between finished ground level and the barrier shall be two (2) inches
(51 mm) measured on the side of the barrier which faces away from the swimming pool. Where
the top of the pool structure is above grade, such as an aboveground pool, the barrier may be at
ground level, such as the pool structure, or mounted on top of the pool structure. Where the
barrier is mounted on top of the pool structure, the maximum vertical clearance between the top
of the pool structure and the bottom of the barrier shall be four (4) inches (102 mm).
Exception: The top of the barrier shall be at
least forty-eight (48) inches (1219 mm) above
ground level measured on the side of the barrier which faces away from the swimming pool
provided the swimming pool is equipped with a rigid safety cover.
2 through 10. Same as International Residential Code.
SECTION 2. The repeal of article VI of Chapter 6 of the
Code of Ordinances, City of
Columbia, Missouri relating to the CABO One and Two Family Dwelling Code shall not affect
any offense or act committed or done or any penalty or forfeiture incurred before the effective
date of this ordinance.
SECTION 3. This ordinance shall be in full force and effect from and after
January 1, 2003.
PASSED this 4th day of November, 2002.