[Ord. No. 08-06 §3, 12-30-2008]
A.
A certain document, three (3) copies of which one (1) copy is on file in the office of the Cass County Clerk and the remaining two (2) copies may be maintained in the Building Codes office of the County of Cass, Missouri, being marked and designated as the International Residential Code, 2006 Edition, including Appendix Chapters G, J and M, as published by the International Code Council, Inc., be and is hereby adopted as the Building Code of the County of Cass in the State of Missouri for the control of building and structures as herein provided; and each and all of the regulations, provisions, penalties, conditions and terms of said Building Code are hereby referred to, adopted and made a part hereof, as if fully set out in this Article, with the additions, insertions, deletions and changes, if any, prescribed in Subsection (B) hereof and Section 500.020 of this Chapter.
B.
The following Sections are hereby revised.
1.
IRC Section R101.1. Insert: Cass County.
2.
IRC Section R103. Department of Building Safety. Shall be amended as follows: Delete Department of Building Safety
and insert: Building Codes Department.
3.
IRC Section R103.1. Creation of enforcement agency. Shall be amended as follows: Delete the entire paragraph and insert:
The Codes Administration Department is hereby created and the official
in charge thereof for purposes of administration of this code shall
be known as the Building Official, Code Official or Director of Codes
Administration.
4.
IRC Section R105.2. Work exempt from permit. Delete item number 1 and insert the following.
One-story detached accessory structures used as tool and storage
sheds, playhouses and similar uses, provided the floor area does not
exceed 400 square feet (37.1 m2).
5.
EXPIRATION
EXTENSIONS
RENEWAL OF EXPIRED PERMIT WHEN WORK HAS BEEN STARTED
RENEWAL OF EXPIRED PERMIT WHEN NO WORK HAS STARTED
IRC Section R105.5 Delete in its entirety.
Amend as follows.
Every permit issued shall become invalid unless the work
authorized by such permit is commenced and an inspection has been
requested by the permit holder within one hundred eighty (180) days
after its issuance or if the building or work authorized by such permit
is suspended or abandoned at any time after the work is commenced
for a period of one hundred eighty (180) days. Every building permit
issued by the Code Official under provisions of the technical codes
shall expire by limitation and become null and void unless the building
or work authorized by such permit is not completed and approved within
one (1) year from the date such permit was issued.
All work requiring a permit shall be suspended upon the expiration
of a permit.
A permittee holding an unexpired permit may apply for an
extension of the time within which work may be completed under that
permit. Permit extensions shall be subject to the expiration periods
specified by Section R105.5. Fees, as required by the fee schedule
adopted by the jurisdiction, for the extension of a permit shall be
paid prior to the expiration date of the permit.
A permittee holding an expired permit may apply for a renewal
of the permit to allow for the completion of the work started. Permit
renewals shall be subject to the expiration periods specified by Section
R105.5. Fees, as required by the fee schedule adopted by the jurisdiction,
for the renewal of a permit shall be paid prior to the work authorized
by the permit being started.
Before work can be started, a new permit shall be first obtained
to do so, provided no changes have been made or will be made in the
original plans and specifications for such work. In order to renew
action on a permit after expiration, the permittee shall pay a new
full permit fee. Permits shall not be renewed when no work has begun
if the codes or regulations adopted by the jurisdiction have been
changed since the permit was originally issued.
6.
IRC Section R106.3.1.1 shall be added as follows.
Design required. A design in accordance with
accepted engineering practice shall be provided for concrete or masonry
foundation walls when any of the conditions listed below are found
to exist.
1.
Foundation walls that are subject to hydrostatic pressure from
ground water.
2.
Foundation walls and retaining walls supporting more than 48
inches (1,219 mm) of unbalanced backfill that do not have permanent
lateral support at the top or bottom.
3.
Foundation walls exceeding 9 feet in height, measured from the
top of the wall to the bottom of the slab.
4.
Footings and foundations placed on fill.
5.
Foundations installed on slopes steeper than 4:1 before grading.
6.
Foundations that bear partially on soil and partially on rock.
7.
Foundation walls with an unbroken line of greater than 25 feet.
8.
Masonry foundation walls with an unbalanced backfill height
greater that 4 feet.
9.
ICF foundation walls.
10.
Concrete slabs located over accessible space that have a clear
span greater than 4 feet in any direction.
11.
Log structures.
12.
Cold formed steel framing.
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Where applicable, a standard design approved by the Code Official
may be used in lieu of a design from a design professional. For new
single-family dwellings where standard designs approved by the Code
Official are used, the design professional sealing the plans shall
specify the use of those designs on the approved plans or through
a separate report.
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8.
IRC Sections R112.2.1 and R112.2.2. Shall be
deleted in their entirety.
9.
AGRICULTURAL BUILDING
AGRICULTURAL USE
BEDROOM
CODE OFFICIAL
ELECTRICAL CODE
IRC Section R202. Shall be amended to include
the following:
A building or structure located on a tract of land forty
(40) contiguous acres or more in area, used for storage of equipment
or produce or other commodities necessary for agricultural use, but
not including buildings intended for residential uses or the parking
or storage of private motor vehicles.
The use of a tract of land forty (40) contiguous acres or
more in area for the raising of crops, dairying, pasturage, general
farming, truck farming, cultivation of field crops, orchards, groves,
raising fish, birds or poultry and accessory uses, necessary for the
carrying out of farming operations, including structures for storage,
processing and sale of products raised on the premises.
A room that meets the minimum dimension, area and height
requirements for a habitable room as specified in Section R304 and
that has an adjoining area or space that may be utilized as a closet
whether or not the room is actually utilized for sleeping purposes.
This definition is intended to clarify the applications for the requirements
for emergency escape and rescue openings in accordance with Section
R310 and smoke alarms in accordance with Section R317 of the International
Residential Code for One- and Two-Family Dwellings.
The term "Code Official" contained in any reference in this resolution or in any of the model codes adopted in Article II may be used synonymously with the terms Building Codes Director, Building Official, Chief Building Official, authority having jurisdiction, Chief Building Inspector or any other similar terms.
Any reference in this resolution or in any of the model codes
adopted herein to the ICC Electrical Code may be deemed to refer to
the NFPA 70, National Electrical Code, 2005 Edition.
10.
Table R301.2(1). Climatic and Geographic Design Criteria. Insert:
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Ground Snow Load
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20 pounds per square foot
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Wind Speed
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90 miles per hour
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Seismic Design Category
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A
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Weathering
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Severe
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Frost Line Depth
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36 inches
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Termite
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Moderate to heavy
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Winter Design Temp
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6 Degrees Fahrenheit
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Ice Barrier Underlayment
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N/A
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Air Freezing Index
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927
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Annual Air Temperature
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55.5 Degrees Fahrenheit
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11.
IRC Section R303.3. Bathrooms. Amend the last
sentence as follows: Ventilation air from the space shall be exhausted
directly to the outside or to an attic ventilated in accordance with
R806. The point of discharge of the exhaust air shall be at least
three (3) feet (915 mm) from any opening into the building. Bathrooms
which contain only a water closet or lavatory or combination thereof
and similar rooms may be ventilated with an approved mechanical recirculating
fan or similar device designed to remove odors from the air.
12.
IRC Section R317.1. Two-family dwellings. Amend
exception number 1 by adding R after 13.
13.
IRC Section R319.1.1. Field treatment. Delete in its entirety.
14.
IRC Section R319.3. Fasteners. Amend as follows:
Add exception number 3. Borate treated lumber is not subject to this
requirement.
15.
IRC Section R320.1.2. Field treatment. Delete in its entirety.
16.
IRC Section R321.1. Premises identification. Amend as per the 911 director's ordinance.
17.
IRC Section R322.1. Scope. Amend as follows:
Where there are four (4) or more dwelling units in a single structure,
the provisions of Chapter 11 of the International Building Code for
Group "R-3" shall apply.
18.
IRC Section R401.4.1 Shall be amended by adding
the following to the end of the sentence: The load-bearing values
of soils in Cass County shall be assumed to be 2,000 psf for typical
clays.
19.
IRC Section R403.1.1.1. Footing reinforcement. Add the following: Footings for basement foundation walls shall
have a minimum reinforcement consisting of not less than two (2) No.
4 bars, uniformly spaced, located a minimum of three (3) inches (76
mm) from the bottom and edges of the footing.
20.
IRC Section R403.1.1.2. Column pads. Add the
following: Column pads shall be a minimum of twenty-four (24) inches
(610 mm) by twenty-four (24) inches (610 mm) and eight (8) inches
(203 mm) deep (24" x 24" x 8"). Reinforcement shall consist of a minimum
of three (3) No. 4 bars each way, uniformly spaced within each column
pad.
21.
IRC Section R403.1.4 Shall be deleted in its
entirety. Amend as follows.
R403.1.4 Minimum depth. All exterior footings
and foundation systems shall extend below the frost line specified
in Table R301.2(1). All exterior footings shall be placed at least
thirty-six (36) inches (914 mm) below the undisturbed ground surface.
22.
IRC Section R404.1.3. Design required. Amend
by adding the following:
3. Foundation walls over nine (9) feet (2,745 mm) in height
measured from the top of the wall to the bottom of the slab.
23.
IRC Table R404.1(1). Delete in its entirety.
24.
IRC Table R404.1(2). Maximum plate anchorage-bolt
spacing for supported foundation walls.
Delete in its entirety and insert Foundation anchorage. The
sole plate at exterior walls shall be anchored to the foundation with
anchor bolts spaced a maximum of six (6) feet on center. There shall
be a minimum of two (2) bolts per plate section with one (1) bolt
located not more than twelve (12) inches or less than seven (7) bolt
diameters from each end of the plate section. Bolts shall be at least
one-half (½) inch in diameter and shall extend a minimum of
seven (7) inches into masonry or concrete and be capable of having
washer and nut fully installed on bolt. Interior wall sole plates
shall be positively anchored with approved fasteners. A nut and washer
shall be tightened on each bolt of the plate. Sills and sole plates
in contact with concrete shall be protected against decay and termites
in accordance with Section R319 and R320.
25.
IRC Table R404.1(3). Delete in its entirety.
26.
IRC Table 404.1.1(5). Delete in its entirety
and amend as follows Table R404.1.1(5)
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Table R404.1.1(5)
Concrete Foundation Walls Minimum Vertical Reinforcement
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Maximum Wall Height
(feet)
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Wall Thickness
(inches)
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7.5
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9.5
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11.5
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4
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24
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30
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36
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5
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24
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30
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36
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6
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24
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30
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36
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7
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24
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30
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36
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8
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24
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30
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36
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9
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16
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24
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30
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10
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12
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18
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24
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Notes to Table:
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1.
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Reinforcing is based upon minimum yield strength of 60,000 psi.
Reinforcement with a minimum yield strength of 40,000 psi or 50,000
psi is permitted, provided the same size bar is used and the spacing
shown in the table is reduced by multiplying the spacing by 0.67 or
0.83, respectively.
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2.
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Horizontal reinforcing shall be spaced at a maximum of 24 inches
on center with one bar located within 12 inches of the top and bottom
of the wall.
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3.
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Spacing is based upon minimum #4 reinforcing bar, a larger bar
size may be used, provided the bar spacing results in an equivalent
cross-sectional area of reinforcement per linear foot of wall.
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4.
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Reinforcement shall be placed nearest the inside face of the
wall a distance d from the outside face (soil side) of the wall. The
distance d is equal to the wall thickness, t, minus 1.25 inches plus
one-half the bar diameter, db (d = t (1.25+db/2). The reinforcement
shall be placed within a tolerance of ± inch where d is less
than or equal to 8 inches or ± ½ inch where d is greater
than 8 inches.
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5.
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Concrete cover for reinforcement measured from the inside face
of the wall shall not be less than 3/4 inch. Concrete cover for reinforcement
measured from the outside face of the wall shall not be less than
1 ½ inches for #5 bars and smaller and not less than 2
inches for larger bars.
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6.
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Concrete shall have a minimum compressive strength of not less
than 3,000 psi at 28 days.
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7.
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Walls with an unbroken wall line greater than 25 feet shall
be provided with pilasters or shall be designed.
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8.
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Walls exceeding 7 feet in height shall be restrained at bottom
by floor slab.
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9.
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Maximum backfill height shall be one foot less than total wall
height.
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10.
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Foundations bearing on soils with different bearing capacities
as established by Table R401.4.1 require an engineered design.
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27.
IRC Section R404.1.7. Backfill placement. Amend
as follows: Backfill shall not be placed against the wall until the
wall has sufficient strength or has been sufficiently braced to prevent
damage by the backfill.
Exception: Such bracing is not required for
walls supporting less than 4 feet (1,219 mm) of unbalanced backfill.
28.
IRC Section R405.1. Concrete or masonry foundations. Amend as follows: Drains shall be provided around all concrete or
masonry foundations that retain earth and enclose habitable or usable
spaces located below grade. Drainage tiles, perforated pipe or other
approved systems or materials shall be installed at or below the area
to be protected and shall discharge by gravity or mechanical means
into an approved drainage system. The top of open joints of drain
tiles shall be protected with strips of building paper and the drainage
tiles or perforated pipe shall be placed on a minimum of 2 inches
(51 mm) of washed gravel or crushed rock at least one (1) sieve size
larger than the tile joint opening or perforation and covered with
not less than 6 inches (152 mm) of the same material.
29.
IRC Section R502.8.2. Engineered wood products. Amend as follows: Add last sentence to read: Engineering calculations
or data sheets provided by the manufacturer or registered design professional
for the proposed cut, notch or hole shall be provided to the Building
Codes Department.
30.
IRC Section R613.2. Window sills. Delete in
its entirety.
31.
IRC Section R801.3. Roof drainage. Amend as
follows: All dwellings shall have a controlled method of water disposal
from roofs that will collect and discharge all roof drainage to the
ground surface at least 3 feet (915 mm) from the foundation walls
or to an approved drainage system.
32.
IRC Section 1103.2. Ducts. Delete in its entirety
and amend as follows: All portions of the air distribution system
shall be installed in accordance with IRC Section M1601. Supply and
return ducts located within the building but outside of conditioned
space must be insulated to an installed R-5 and insulated to an installed
R-8 when located outside of the building.
33.
IRC Section G2417.4.1 Test Pressure. Amend
as follows: Change the 3 psig (20 kPa) to 10 psi (70kPa).
34.
IRC Section G2417.4.2. Test Duration. Amend
as follows: Change the 10 minutes to 15 minutes.
35.
IRC Section P2603.6.1. Sewer depth. Amend as
follows: Building sewers shall be a minimum of 12 inches (305 mm)
below grade.
36.
IRC Section P2902.5.3. Lawn irrigation systems. Amend as follows: The potable water supply to lawn irrigation systems
shall be protected against backflow by a device approved by the Missouri
Department of Natural Resources. Backflow devices installed within
structures shall be a minimum of 6 inches (152 mm) away from a wall
or vertical obstruction. The backflow device shall be installed between
12 inches (305 mm) and 48 inches (1,220 mm) above the floor and shall
be accessible.
