[R.O. 2011 § 500.070; R.O. 2009
§ 150.020; Ord. No. 97-152, 5-8-1997; Ord. No. 02-46, 3-5-2002; Ord. No. 05-152, 5-27-2005; Ord.
No. 10-152 § 6, 7-21-2010; Ord. No. 15-102 § 2, 5-19-2015; Ord.
No. 22-153, 12-6-2022]
A.
The 2021 International Residential Code for One- and Two-Family Dwellings,
including Appendixes A, B, C, D, G, H, J, K, N, and P, except as otherwise
provided in this Chapter, as published by the International Code Council,
Inc., is adopted by reference as the One- and Two-Family Dwelling
Code of the City and made a part of this Section as if fully set forth
herein.
B.
Wherever the phrase "Name of Jurisdiction" appears in the 2021 Edition
of the International Residential Code for One- and Two-Family Dwellings,
it shall be deemed to mean the City.
C.
Nothing in Sections 500.070 and 500.080 or in the One- and Two-Family Dwelling Code hereby adopted shall be construed to affect any suit or proceeding pending in any court, or any rights acquired, or liability incurred, or any cause or causes of action acquired or existing under any act or ordinance hereby amended by Sections 500.070 and 500.080. No just or legal right or remedy of any character shall be lost, impaired or affected by Sections 500.070 and 500.080.
[R.O. 2011 § 500.080; R.O. 2009
§ 150.021; Ord. No. 97-152, 5-8-1997; Ord. No. 98-494, 11-19-1998; Ord. No. 02-46, 3-5-2002; Ord.
No. 05-152, 5-27-2005; Ord. No. 10-152 § 6, 7-21-2010; Ord. No. 15-102 § 2, 5-19-2015; Ord. No. 19-025, 2-5-2019; Ord. No. 19-235, 11-19-2019; Ord. No. 22-153, 12-6-2022; Ord. No. 23-044, 4-18-2023]
A.
1.
Section R102.4, Referenced codes and standards, is amended to
read as follows:
Section R102.4 Referenced codes and standards. If
a referenced standard is in conflict with a code independently and
specifically adopted by the City, the standard in the code specifically
adopted by the City shall prevail over the referenced standard.
2.
Section R103, Department of Building safety, is deleted.
3.
Section 104.11.2, Special Inspections, is to be added and reads
as follows:
Section 104.11.2 Special Inspections. The use of
alternative materials may require special inspections at the cost
of the applicant, owner or authorized agent at the building official's
discretion.
4.
Section R105.2, Work exempt from
permit, the following Sections are amended to read as follows:
Section R105.2 Work exempt from permit.
Building:
1.
One-story detached accessory structures, provided the floor area
does not exceed one hundred forty-four (144) square feet, or decks/porches,
provided the floor area does not exceed twenty-five (25) square feet.
3.
Retaining walls that are not over four (4) feet
(1,219 mm) in height measured from finished grade to the top of the
wall, unless supporting a surcharge.
5.
Sidewalks and driveways not more than thirty (30)
inches (762 mm) above adjacent grade and not over any basement or
story below.
8.
Swings and other playground equipment accessory
to a one- or two-family dwelling.
5.
Section R106.3.1, Approval of construction documents, is amended
to read as follows:
R106.3.1 Approval of construction documents.
Where the building official issues a permit, the construction
documents shall be approved in writing or by a stamp that states "REVIEWED
FOR CODE COMPLIANCE." One set of construction documents so reviewed
shall be retained by the building official. The other set shall be
returned to the applicant, plans are to be available at the site of
work or made available at the time of inspection and shall be open
to inspection by the building official or a duly authorized representative.
6.
Section R108.6, Work commencing before permit issuance, is deleted.
7.
Section R112, Board of Appeals, is deleted.
8.
Section R113.4, Violation penalties, is deleted.
9.
ROUGH-IN
STORY ABOVE GRADE PLANE
1.
2.
Section R202, Definitions, the
definitions of "rough-in" and "story above grade plane" are amended
to read as follows:
The installation of all parts of the plumbing system that
must be completed prior to the installation of fixtures. This includes
DWV, water supply and built in fixture supports. In unfinished areas,
rough-ins will require waste lines only.
Any story having its finished floor surface entirely above
grade plane, or in which the finished surface of the floor next above
is either of the following:
More than six (6) feet (1,829 mm) above grade plane.
More than twelve (12) feet (3,658 mm) above the finished ground
level at any point.
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Exception: When a crawl space or supporting wall
is below a walkout basement, that supporting wall is to be engineered
but will not be considered a story.
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10.
Table R301.2(1) Climatic and Geographic
Design Criteria, the following values shall be entered into the table,
and footnotes b and h to the table are amended as follows:
Ultimate Wind Speed: 107 (48)
Ground Snow Load: 20 psf
Wind Design Speed: 90 mph
Wind Topographical Effect: No
Seismic Design Category: C (unless indicated otherwise in a
soils evaluation report from an approved geotechnical agency)
Weathering: Severe
Frost Line Depth: 30 inches
Termite: Heavy to Severe
Winter Design Temp: 6
Ice Barrier Underlayment Required: No
Flood Hazards: (a) 4-9-1977, (b) 1-20-2016 & 3-9-2021
Air Freezing Index: 1000
Special Wind Region: No
Windborne Debris Zone: No
Mean Annual Temp: 55.2
Foot Notes b and h are amended to read as follows:
12.
Section R302.2, Townhouses, is
amended to read as follows:
R302.2 Townhouses. Common walls separating townhouses
shall be assigned a fire-resistance rating in accordance with Section
R302.2, Item 1 or 2. The common wall shared by two (2) townhouses
shall be constructed without plumbing or mechanical equipment, ducts
or vents in the cavity of the common wall. The wall shall be rated
for fire exposure from both sides and shall extend to and be tight
against exterior walls and the underside of the roof sheathing. Electrical
installations shall be in accordance with Chapters 34 through 43.
Penetrations of the membrane of common walls for electrical outlet
boxes shall be in accordance with Section R302.4.
1.
Where a fire sprinkler system in accordance with Section P2904 is
provided, the common wall shall be not less than a one-hour fire-resistance-rated
wall assembly tested in accordance with ASTM E 119 or UL 263.
2.
Where a fire sprinkler system in accordance with Section P2904 is
not provided, the common wall shall be not less than a two-hour fire-resistance-rated
wall assembly tested in accordance with ASTM E 119 or UL 263.
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Each townhouse shall be considered a separate building and shall
be separated by fire-resistance-rated wall assemblies meeting the
requirements of Section R302.1 as amended for exterior walls.
|
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Each townhouse may be separated with two one-hour fire-resistant
exterior walls or a common two-hour fire-resistant-rated wall. The
two-hour fire-resistant common wall shall not be used for any plumbing
or mechanical equipment, including ducts or vents. Electrical outlet
box penetrations of the common two-hour fire-resistant assembly shall
be installed in accordance with Section R302.4. A parapet is required
above the two-hour common wall or two one-hour fire-resistant exterior
walls constructed in accordance with Section R302.2.3.
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13.
Section R302.5.1, Open protection, is amended to read as follows:
Openings from a private garage directly into a room used for
sleeping purposes shall not be permitted. Other openings between the
garage and residence shall be equipped with solid wood doors not less
than 1 3/8 inches (35 mm) in thickness, solid or honeycomb-core
steel doors not less than 1 3/8 inches (35 mm) thick, or tweenty
(20) minute fire-rated doors.
14.
Section R302.5.2, Duct penetration, is amended to read as follows:
R302.5.2 Duct penetration. Ducts in the garage
and ducts penetrating the walls or ceilings separating the dwelling
from the garage shall be constructed of a minimum No. 28 gage (0.48
mm) sheet steel or other approved material and shall not have openings
into the garage.
15.
Section R302.11, Fireblocking required,
is amended by amending Section 7 to read as follows:
7.
Open web or perforated truss floor joists must be
covered by one (1) sheet of five eights (5/8) inch type "X" fire rated
gypsum board (or equivalent) or a NFPA 13D or a NFPA 13R sprinkler
system must be installed in the basement.
16.
Section R302.13, Fire protection
of floors, is amended to read as follows:
R302.13 Fire protection of floors.
Floor assemblies that are not required elsewhere in this code
to be fire-resistance rated, shall be provided with a one-half (1/2)
inch (12.7 mm) gypsum wallboard membrane, five eighth (5/8) inch (16
mm) wood structural panel membrane, or equivalent on the underside
of the floor framing member. Penetrations or openings for ducts, vents,
electrical outlets, lighting, devices, luminaires, wires, speakers,
drainage, piping and similar openings or penetrations shall be permitted.
Exceptions:
1.
Floor assemblies located directly over a space protected by an automatic
sprinkler system in accordance with Section P2904, NFPA 13D, or other
approved equivalent sprinkler system.
2.
Floor assemblies located directly over a crawl space not intended
for storage or for the installation of fuel-fired or electric-powered
heating appliances.
3.
Portions of floor assemblies
shall be permitted to be unprotected where complying with the following:
3.1.
The aggregate area of the unprotected portions does not exceed
80 square feet (7.4 m2) per story.
3.2.
Fireblocking in accordance with Section R302.11.1 is installed
along the perimeter of the unprotected portion to separate the unprotected
portion from the remainder of the floor assembly.
3.3.
Areas of the floor assembly covered by HVAC metal plenum, trunk
lines, and steel structural beams shall be considered protected. Gypsum
wallboard membrane or other approved fireblocking material shall be
within one-half (1/2) inch of all previously listed items.
4.
Wood floor assemblies using dimension lumber or structural composite
lumber equal to or greater than two (2) inch by ten (10) inch (50.8
mm by 254 mm) nominal dimension, or other approved floor assemblies
demonstrating equivalent fire performance.
17.
Section R303.1, Habitable rooms,
the following exception is added to the list of exceptions to read
as follows:
4.
Unfinished basements and utility rooms require natural
ventilation (net openable area) at the ratio of one percent (1%) of
the square footage floor area served. Mechanical ventilation with
outdoor air (not re-circulated air) in accordance with the Mechanical
Code may be substituted at a rate of .05 cfm/sq. ft. of area.
18.
Section R303.3, Bathrooms, the exception is amended to read
as follows:
Exception: The glazed areas shall not be required
where artificial light and a local exhaust system are provided. The
minimum local exhaust rates shall be determined in accordance with
Section M1507. Exhaust air from the space shall be exhausted directly
to the outdoors or to an attic gable vent or ventilated soffit.
19.
Section R303.4, Mechanical ventilation, is amended to read as
follows:
Where the air infiltration rate of a dwelling unit is 3 air
changes per hour or less where tested with a blower door at a pressure
of two tenths (0.2) inch w.c. (50 Pa) in accordance with Section N1102.4.1.2,
the dwelling unit shall be provided with whole-house mechanical ventilation
in accordance with Section M1507.3.
20.
Section R303.5.2, Exhaust openings, is amended to read as follows:
Exhaust air shall not be directed below six (6) feet and eight
(8) inches onto public walkways.
21.
Section R303.8, Exterior stairway illumination, is amended by
adding an exception to read as follows:
Exception: Illumination is not required on residential
decks that are not part of the required of egress path.
22.
Section R306.5, Hose bibb, the following Section is added to
read as follows:
Section R306.5 Hose Bibb. Every dwelling shall
provide one outside frost-proof hose bibb. The hose bibb shall be
protected from backflow per Section P2902.
23.
Section R306.6, Floor Drain, the following Section is added
to read as follows:
Section R306.6, Floor Drain. All basements shall
have a floor drain within twenty (20) feet of the heating/cooling
system(s) and water heaters. The floor drain shall comply with Chapter
27 of the International Residential Code for One- and Two-Family Dwellings.
24.
Section R309.5, Fire sprinklers, is amended to read as follows:
R309.5 Fire sprinklers. Private garages shall be
protected by fire sprinklers where the garage wall has been designed
based on Table 302.1(2), Footnote a, and the homeowner has opted to
purchase a fire sprinkler system for their residence, as per Section
67.281, RSMo. Sprinklers in garages shall be connected to an automatic
sprinkler system that complies with Section P2904. Garage sprinklers
shall be residential sprinklers or quick-response sprinklers, designed
to provide a density of 0.05 gpm/ft2. Garage
doors shall not be considered obstructions with respect to sprinkler
placement.
25.
Section R310.1, Emergency escape
and rescue opening required, is amended by amending the exceptions
to read as follows:
Exceptions:
1.
Storm shelters and basements used only to house mechanical equipment
not exceeding a total floor area of two hundred (200) square feet
(18.58 m2).
26.
Section R311.3, Floors and landings
at exterior doors, is amended to read as follows:
R311.3 Floors and landings at exterior doors. There
shall be a landing or floor at each required egress exterior door.
The width of each landing shall not be less than the door served.
Every landing shall have a dimension of not less than thirty-six (36)
inches (914 mm) measured in the direction of travel. The slope at
exterior landings shall not to exceed 1/4 unit vertical in 12 units
horizontal (two percent).
Exceptions:
1.
Exterior balconies less than sixty (60) square feet (5.6 m2) and only accessible from a door are permitted to
have a landing less than thirty-six (36) inches (914 mm) measured
in the direction of travel.
2.
Non-required means of egress doors with no landing, for future deck/balcony
shall be protected with a mechanical fastened thirty-six (36) inches
tall guard rail if/when the door sill height exceeds (23 1/4
inches) above grade.
27.
Section R311.3.2, Floor elevations
for other exterior doors, is amended by amending the exceptions to
read as follows.
Exceptions:
1.
A top landing is not required where a stairway of four (4) or fewer
risers is located on the exterior side of the door, provided the door
does not swing over the stairway.
2.
Doors, with no landing, for future deck/balcony shall be protected
by an approved guard if the door threshold is more than three (3)
risers (23 1/4 inches) above grade.
3.
Exterior balconies less than sixty (60) square feet and only accessible
from a door are permitted to have a landing less than thirty-six (36)
inches measured in the direction of travel.
28.
Sections R313.1 to R313.2.1, Townhouse automatic fire sprinkler
systems, are deleted.
29.
Section R403.1.4.1, Frost protection,
is amended by amending the exceptions to read as follows:
Exceptions:
1.
Freestanding accessory structures with an area not exceeding two
hundred (200) square feet and an eave height of ten (10) feet or less
shall not be required to be protected.
2.
Decks not supported by a dwelling, not exceeding one hundred forty-four
(144) square feet, need not be provided with footings that extend
below the frost line. Footings shall not bear on frozen soil unless
such frozen condition is of a permanent character.
30.
Section R403.1.7, Footings on or adjacent to slopes, is amended
to read as follows:
The placement of buildings and structures on or adjacent to
slopes steeper than one (1) unit vertical in three (3) units horizontal
thirty-three and three tenths percent (33.3%) slope shall conform
to Sections R403.1.7.1 through R403.1.7.4 or plans as signed and sealed
by a registered structural engineer.
31.
Section R405.1, Concrete and masonry
foundations, is amended by amending the exceptions to read as follows:
Exceptions:
1.
A drainage system is not required where the foundation is installed
on well-drained ground or sand-gravel mixture soils according to the
Unified Soil Classification System, Group I soils, as detailed in
Table R405.1.
2.
Drains provided as detailed in Section R405.1.2 are approved as an
alternative method to meet the requirements of this Section.
32.
Section R405, Foundation Drainage, is amended to add five (5)
new subsections to read as follows:
R405.1.2 Soil evaluations. An evaluation of the
soil from a geotechnical engineer for the presence or absence of groundwater
is required. The evaluation report shall be based on either a subsurface
soil investigation or satisfactory data from adjacent areas together
with an inspection of the excavation prior to pouring concrete.
R405.1.2.1 Groundwater present. Provide drain tile,
perforated pipe or other approved foundation drainage systems (such
as water channel system) around perimeter of the outside of the foundation
and inside the foundation. Drain discharge shall be by gravity to
daylight or be connected to a basement floor sump.
R405.1.2.2 No groundwater present. Provide drain
tile, perforated pipe or other approved foundation drainage systems
(such as water channel system) around perimeter of the outside of
the foundation or inside the foundation. Drain discharge shall be
by gravity to daylight or be connected to a basement floor sump pit/pump.
R405.1.2.3 Filter membranes. An approved filter
membrane shall be placed over the top of the joints/pipe perforations.
The tile/pipe shall be placed on two (2) inches minimum of gravel
or crushed stone and have six (6) inches of minimum cover.
R405.1.2.4 Drainage system. A drainage system shall
discharge by gravity to daylight or be connected to an approved sump
(eighteen (18) inches in diameter x twenty-four (24) inches deep with
fitted cover). A sump pump shall be provided if the basement is finished
or partially finished with pump discharge by an approved method.
33.
Section R506.2.3, Vapor Retarder, is amended to read as follows:
R506.2.3 Vapor Retarder. A minimum six (6) mil
(0.006 inch; 0.152 mm) vapor retarder conforming to ASTM E1745 Class
A requirements with joints lapped not less than six (6) inches (152
mm) shall be placed between the concrete floor slab and the base course
or the prepared subgrade where a base course does not exist.
34.
Table R507.9.1.3(1), Deck Ledger Connection to Band Joist, is
amended to read as follows:
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Table R507.9.1.3(1) Deck Ledger Connection to Band Joist
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|---|---|---|---|---|---|---|---|
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(Deck Live Load = 40 psf, Deck Dead Load = 10 psf, Snow Load
< 40 psf)
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Joist Span
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6'-0" and Less
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6'-1" to 8'-0"
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8'-1" to 10'-0"
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10'-1" to 12'-0"
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12'-1" to 14'-0"
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14'-1" to 16'-0"
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16'-1" to 18'-0"
|
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Connection Details
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On-Center Spacing of Fastenersd,e
| ||||||
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1/2-inch diameter lag screw with 1/2-inch maximum sheathing
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16
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16
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16
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15
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13
|
11
|
10
|
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1/2-inch diameter bolt with 1/2-inch maximum sheathing
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24
|
24
|
24
|
24
|
24
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21
|
19
|
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1/2-inch diameter bolt with 1-inch maximum sheathing
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24
|
24
|
24
|
24
|
21
|
18
|
16
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35.
Section R905.2.8.2, Valleys, is
amended to read as follows:
R905.2.8.2 Valleys. Valley linings shall be installed
in accordance with the manufacturer's instructions before applying
shingles. Valley linings of the following types shall be permitted:
1.
For open valleys (valley lining exposed) lined with metal, the valley
lining shall be not less than twenty-four (24) inches (610 mm) wide
and of any of the corrosion-resistant metals in Table R905.2.8.2.
2.
For open valleys, valley lining of two (2) plies of mineral-surfaced
roll roofing, complying with ASTM D 3909 or ASTM D 6380 Class M, shall
be permitted. The bottom layer shall be eighteen (18) inches (457
mm) and the top layer not less than thirty-six (36) inches (914 mm)
wide.
3.
For closed valleys (valley covered with shingles), valley lining
of two (2) ply of No. 15 felt complying with ASTM D 226 Type I, ASTM
D 4869 Type I, or ASTM D 6757, or valley lining as described in Item
1 and 2 shall be permitted. Self-adhering polymer modified bitumen
underlayment complying with ASTM D 1970 shall be permitted in lieu
of the lining material.
36.
Section R905.2.8.5, Drip edge, is amended to read as follows:
R905.2.8.5 Drip Edge. A drip edge or equivalent
shall be provided at eaves and rake edges of shingle roofs. Adjacent
segments of drip edge shall be overlapped not less than two (2) inches
(51 mm). Drip edges shall extend not less than one-fourth (1/4) inch
(6.4 mm) below the roof sheathing and extend up back onto the roof
deck not less than two (2) inches (51 mm). Drip edges shall be mechanically
fastened to the roof deck at not more than twelve (12) inches (305
mm) o.c. with fasteners as specified in Section R905.2.5. Underlayment
shall be installed over the drip edge along eaves and under the underlayment
along rake edges.
37.
Section R1005.7, Factory-build chimney offsets, is amended to
add an exception to read as follows:
Exception: When chimneys are installed per manufacturer's
installation instructions.
38.
Section R1005.8, Installation, is added, which shall read as
follows:
Section R1005.8 Installation: Factory-built chimneys
shall be installed in accordance with the manufacturer's installation
instructions. The flue chase for a factory-built chimney shall have
a minimum of one (1) thickness of five-eighths (5/8) inch, Type X
drywall or its equivalent extending to the roof sheathing of the structure
applied to the inside of every portion of the flue chase that abuts
a structure.
39.
Section 1005.9, Required Fire Separation Enclosures, is added,
which shall read as follows:
Section R1005.9 Required Fire Separation Enclosures. All prefabricated metal chimneys shall be enclosed in a shaft with
one (1) layer of five-eighths (5/8) inch, Type X drywall or equivalent
from the fireplace connector to the underside of the roof sheathing
securely attached with framing material. When the chimney is located
on the exterior of the structure, it need only be separated by lining
the exterior wall adjacent to the shaft with one (1) layer of five-eighths
(5/8) inch, Type X drywall or equivalent. All joints are to be tight
within one-eighth (1/8) of an inch or taped with a layer of joint
compound. Required clearances shall be maintained between chimney
and the drywall per chimney manufacturer's specifications.
40.
R1006.2, Exterior air intake, is amended to read as follows:
R1006.2 Exterior air intake. The exterior air intake
on masonry fireplaces shall be capable of supplying combustion air
from the exterior of the dwelling or from spaces within the dwelling
ventilated with outdoor air such as nonmechanically ventilated crawl
or attic spaces. The exterior air intake shall not be located within
the garage or basement of the dwelling. The exterior air intake, for
other than listed factory-built fireplaces, shall not be located at
an elevation higher than the firebox. The exterior air intake shall
be covered with a corrosion-resistant screen of one quarter (1/4)
inch (6.4 mm) mesh.
41.
Chapter 11 is to be amended to read as follows:
All Sections of Chapter 11 of the 2021 International Residential
Code and referenced 2021 International Energy Conservation Code are
to be deleted. Chapter 11 shall reference the 2015 International Residential
Code and 2015 International Energy Conservation Code and their amended
sections as listed per City ordinance.
42.
Section N1101.13 (R401.2), Compliance,
is amended to read as follows:
N1101.13 (R401.2) Compliance. Projects shall comply
with one of the following:
43.
Section N1102.14 (R401.3), Certificate (Mandatory), is amended
to read as follows:
N1101.14 (R401.3) Certificate (Mandatory). Unless
otherwise presented to the home owner and building official in writing,
a permanent certificate shall be completed by the builder or registered
design professional and posted on a wall in the space where the furnace
is located, a utility room or an approved location inside the building.
Where located on an electrical panel, the certificate shall not cover
or obstruct the visibility of the circuit directory label, service
disconnect label or other required labels. The certificate shall list
the predominant R-values of insulation installed in or on ceiling/roof,
walls, foundation (slab, basement wall, crawl space wall and/or floor)
and ducts outside conditioned spaces; U-factors for fenestration and
the solar heat gain coefficient (SHGC) of fenestration, and the results
from any required duct system and building envelope air leakage testing
done on the building. Where there is more than one (1) value for each
component, the certificate shall list the value covering the largest
area. The certificate shall list the types and efficiencies of heating,
cooling and service water heating equipment. Where a gas-fired unvented
room heater, electric furnace, or baseboard electric heater is installed
in the residence, the certificate shall list "gas-fired unvented room
heater," "electric furnace" or "baseboard electric heater," as appropriate.
An efficiency shall not be listed for gas-fired unvented room heaters,
electric furnaces or electric baseboard heaters.
44.
Table N1102.1.2 (R402.1.2), Insulation and Fenestration Requirements
by Component, is amended to read as follows:
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Table N1102.1.2 (R402.1.2)
Insulation and Fenestration Requirements by Componenta
| ||||
|---|---|---|---|---|
|
Climate Zone
|
Fenestration U-Factorb
|
Skylightb U-Factor
|
Glazed Fenestration SHGCb,e
|
Ceiling R-Value
|
|
1
|
NR
|
0.75
|
0.25
|
30
|
|
2
|
0.40
|
0.65
|
0.25
|
38
|
|
3
|
0.35
|
0.55
|
0.25
|
38
|
|
4 except Marine
|
0.40
|
0.55
|
NR
|
38
|
|
5 and Marine 4
|
0.32
|
0.55
|
NR
|
49
|
|
6
|
0.32
|
0.55
|
NR
|
49
|
|
7 and 8
|
0.32
|
0.55
|
NR
|
49
|
|
Climate Zone
|
Wood Frame Wall R-Value
|
Mass Wall R-Valuei
|
Floor R-Value
|
Basementc Wall R-Value
|
Slabd R-Value and Depth
|
Crawl Spacec Wall R-Value
|
|---|---|---|---|---|---|---|
|
1
|
13
|
3/4
|
13
|
0
|
0
|
0
|
|
2
|
13
|
4/6
|
13
|
0
|
0
|
0
|
|
3
|
20 or 13 + 5h
|
8/13
|
19
|
5/13f
|
0
|
5/13
|
|
4 except Marine
|
13l,m
|
8/13
|
19
|
0j,k
|
10, 2 ft
|
10/13
|
|
5 and Marine 4
|
20 or 13 + 5h
|
13/17
|
30g
|
15/19
|
10, 2 ft
|
15/19
|
|
6
|
20 + 5 or 13 + 10h
|
15/20
|
30g
|
15/19
|
10, 4 ft
|
15/19
|
|
7 and 8
|
20 + 5 or 13 + 10h
|
19/21
|
38g
|
15/19
|
10, 4 ft
|
15/19
|
|
NOTES:
| |
|
For SI: 1 foot = 304.8mm.
| |
|
a
|
R-values are minimums. U-factors and SHGC are maximums. When
insulation is installed in a cavity which is less than the label or
design thickness of the insulation, the installed R-value of the insulation
shall not be less than the R-value specified in the table.
|
|
b
|
The fenestration U-factor column excludes skylights. The SHGC
column applies to all glazed fenestration. Exception: Skylights may
be excluded from glazed fenestration SHGC requirements in Climate
Zones 1 through 3 where the SHGC for such skylights does not exceed
0.30.
|
|
c
|
"15/19" means R-15 continuous insulation on the interior or
exterior of the home or R-19 cavity insulation at the interior of
the basement wall. "15/19" shall be permitted to be met with R-13
cavity insulation on the interior of the basement wall plus R-5 continuous
insulation on the interior or exterior of the home. "10/13" means
R-10 continuous insulation on the interior or exterior of the home
or R-13 cavity insulation at the interior of the basement wall.
|
|
d
|
R-5 shall be added to the required slab edge R-values for heated
slabs. Insulation depth shall be the depth of the footing or two (2)
feet, whichever is less in Zones 1 through three (3) for heated slabs.
|
|
e
|
There are no SHGC requirements in the Marine Zone.
|
|
f
|
Basement wall insulation is not required in warm-humid locations
as defined by Figure N1101.10 or Table N1101.10.
|
|
g
|
Or insulation sufficient to fill the framing cavity, R-19 minimum.
|
|
h
|
The first value is cavity insulation, the second value is continuous
insulation, so "13+5" means R-13 cavity insulation plus R-5 continuous
insulation.
|
|
i
|
The second R-value applies when more than half of the insulation
is on the interior of the mass wall.
|
|
j
|
Exception: Unfinished basements may have up to a maximum of
twenty percent (20%) of the total basement wall area exposed above
the outside finished grade/ground level as uninsulated concrete foundation
walls. The foundation wall area above the outside grade/ground level
that may be uninsulated is determined by the formula [.20 times the
basement wall height of all walls (including insulated exterior frame
walls for walkout basements and walls common to both basement and
attached garages) times the perimeter of these basement walls]. In
unfinished areas, the basement foundation wall insulation shall extend
down to the basement floor slab or to a minimum of twenty-four (24)
inches below outside finished grade when the grade is above the floor
slab elevation.
|
|
k
|
Basement blankets will be required only to depth of the frost
line.
|
|
l
|
Low expansive foam shall be used around doors and windows. Foam
insulations shall be applied around all exterior wall penetrations
and electrical boxes, and caulking shall be applied at the top and
bottom of wall plates.
|
|
m
|
Exhaust systems shall be installed in the home and designed
to have the capacity to exhaust a minimum air flow rate of 50 cfm
intermittent or 20 cfm continuous to help provide outside air through
typical home use and passive air infiltration.
|
45.
Section N1102.1.3 (R402.1.3), R-value computation, is amended
to read as follows:
N1102.1.3 (R402.1.3) R-value computation. Insulation
material used in layers, such as framing cavity insulation, or continuous
insulation shall be summed to compute the corresponding component
R-value. The manufacturer's settled R-value shall be used for blown
insulation. Computed R-values may include an R-value for other building
materials or air films. Where insulated siding is used for the purpose
of complying with the continuous insulation requirements of Table
N1102.1.2, the manufacturer's labeled R-Value for insulated siding
shall be reduced by R-0.6.
46.
Section N1102.2.1 (R402.2.1), Ceilings with attic spaces, is
amended to read as follows:
N1102.2.1 (R402.2.1) Ceilings with attic spaces. Where Section R1102.1.2 would require R-38 insulation in the ceiling,
installing R-30 over one hundred percent (100%) of the ceiling area
requiring insulation shall be deemed to satisfy the requirement for
R-38 wherever the full height of uncompressed R-30 insulation extends
over the wall top plate at the eaves using Averaging Computation Method
(ACM). Similarly, where Section R1102.1.2 would require R-49 insulation
in the ceiling, installing R-38 over one hundred percent (100%) of
the ceiling area requiring insulation shall be deemed to satisfy the
requirement for R-49 insulation wherever the full height of uncompressed
R-38 insulation extends over the wall top plate at the eaves using
Averaging Computation Method (ACM). This reduction shall not apply
to the U-factor alternative approach in Section R1102.1.4 and the
total UA alternative in Section R1102.1.5.
47.
Section N1102.4 (R402.4), Air leakage, is amended to read as
follows:
N1102.4 (R402.4) Air leakage. The building thermal
envelope may be designed and constructed to limit air leakage in accordance
with the requirements of Sections R1102.4.1 through R1102.4.4.
48.
Table N1102.4.1.1 (R402.4.1.1), Air Barrier and Insulation,
is amended to read as follows:
|
Table N1102.4.1.1 (402.4.1.1)
Air Barrier and Insulation Installation
| ||
|---|---|---|
|
Component
|
Air Barrier Criteria
|
Insulation Installation Criteria
|
|
General requirements
|
A continuous air barrier shall be installed in the building
envelope.
The exterior thermal envelope contains a continuous air barrier.
Breaks or joints in the air barrier shall be sealed.
|
Air-permeable insulation shall not be used as a sealing material.
|
|
Ceiling/attic
|
The air barrier in any dropped ceiling/soffit shall be aligned
with the insulation and any gaps in the air barrier sealed.
Access openings, drop down stairs or knee wall doors to unconditioned
attic spaces shall be sealed.
|
The insulation in any dropped ceiling/soffit shall be aligned
with the air barrier.
|
|
Walls
|
The junction of the foundation and sill plate shall be sealed.
The junction of the top plate and the top of the exterior walls
shall be sealed
Knee walls shall be sealed.
|
Cavities within corners and headers of frame walls shall be
insulated by completely filling the cavity with a material having
a thermal resistance of R-3 per inch minimum.
Exterior thermal envelope insulation for framed walls shall
be installed in substantial contact and continuous alignment with
the air barrier.
|
|
Windows, skylights and doors
|
The space between window/door jambs and framing, and skylights
and framing shall be sealed.
| |
|
Rim joists
|
Rim joists shall include the air barrier.
|
Rim joists shall be insulated.
|
|
Floors (including above garage and cantilevered floors)
|
The air barrier shall be installed at any exposed edge of insulation.
|
Floor framing cavity insulation shall be installed to maintain
permanent contact with the underside of subfloor decking, or floor
framing cavity insulation shall be permitted to be in contact with
the top side of sheathing, or continuous insulation installed on the
underside of floor framing; and extends from the bottom to the top
of all perimeter floor framing members.
|
|
Crawl space walls
|
Exposed earth in unvented crawl spaces shall be covered with
Class I vapor retarder with overlapping joists taped.
|
Where provided instead of floor insulation, insulation shall
be permanently attached to the crawl space walls.
|
|
Narrow cavities
|
Batts in narrow cavities shall be cut to fit, or narrow cavities
shall be filled by insulation that on installation readily conforms
to the available cavity space.
| |
|
Garage separation
|
Air sealing shall be provided between the garage and conditioned
spaces.
| |
|
Plumbing and wiring
|
Batt insulation shall be cut neatly to fit around wiring and
plumbing in exterior walls, or insulation that on installation readily
conforms to available space shall extend behind piping and wiring.
| |
|
Shower/tub on exterior wall
|
The air barrier installed at exterior walls adjacent to showers
and tubs shall separate them from showers and tubs.
|
Exterior walls adjacent to showers and tubs shall be insulated.
|
|
Electrical/phone box on exterior walls
|
The air barrier shall be installed behind electrical or communication
boxes or air-sealed boxes shall be installed.
| |
|
Concealed sprinklers
|
When required to be sealed, concealed fire sprinklers shall
only be sealed in a manner that is recommended by the manufacturer.
Caulking or other adhesive sealants shall not be used to fill voids
between fire sprinkler cover plates and walls or ceilings.
| |
|
NOTES:
| |
|
a.
|
In addition, inspection of log walls shall be in accordance
with the provisions of ICC 400.
|
49.
Section N1102.4.1.2 (R402.4.1.2),
Testing, is amended to read as follows:
N1102.4.1.2 (R402.4.1.2) Testing. Any building
or dwelling unit when constructed substantially above the standards
set forth in Table N1102.1.2 shall be tested and verified as having
an air leakage rate of not exceeding five (5) air changes per hour
in Climate Zone 4. Testing shall be conducted in accordance with ASTM
E 779 or ASTM E 1827 and reported at a pressure of two and five tenths
(0.2) inches w.g. (fifty (50) Pascals). Where required by the code
official, testing shall be conducted by an approved third party. A
written report of the results of the test shall be signed by the party
conducting the test and provided to the code official. Testing shall
be performed at any time after creation of all penetrations of the
building thermal envelope.
During testing:
1.
Exterior windows and doors, fireplace and stove doors shall be closed,
but not sealed, beyond the intended weatherstripping or other infiltration
control measures.
2.
Dampers, including exhaust, intake, makeup air, backdraft and flue
dampers, shall be closed, but not sealed beyond intended infiltration
control measures.
3.
Interior doors, if installed at the time of the test, shall be open.
4.
Exterior doors for continuous ventilation systems and heat recovery
ventilators shall be closed and sealed.
5.
Heating and cooling systems, if installed at the time of the test,
shall be turned off.
6.
Supply and return registers, if installed at the time of the test,
shall be fully open.
50.
Section N1102.4.5 (R402.4.5), Recessed lighting, is amended
to read as follows:
N1102.4.5 (R402.4.5) Recessed lighting. Recessed
luminaires-penetrating the building thermal envelope shall be sealed
to limit air leakage between conditioned and unconditioned spaces.
All recessed luminaires shall be IC-rated and labeled as having an
air leakage rate not more than 2.0 cfm (0.944 L/s) when tested in
accordance with ASTM E 283 at a 1.57 psf (75 Pa) pressure differential.
All recessed luminaires shall be sealed with a gasket or caulk between
the housing and interior wall or ceiling covering.
51.
Section N1103.7 (R403.7), Equipment sizing and efficiency rating
(Mandatory), is amended to read as follows:
N1103.7 (R403.7) Equipment sizing and efficiency rating
(Mandatory). Heating and cooling equipment shall be sized in
accordance with ACCA Manual J or other approved heating and cooling
calculation methodologies. New or replacement heating and cooling
equipment shall have an efficiency rating equal to or greater than
the minimum required by Federal law for the geographic location where
the equipment is installed.
52.
Section N1104.1 (R404.1), Lighting equipment (Mandatory), is
amended to read as follows:
N1104.1 (R404.1) Lighting equipment (Mandatory). When provided by the builder, not less than seventy-five percent
(75%) of the supplied lamps in permanently installed lighting fixtures
shall be high-efficacy lamps or not less than seventy-five percent
(75%) of the permanently installed lighting fixtures shall contain
only high-efficacy lamps.
Exception: Low-voltage lighting.
53.
Section N1104.1.1 (R404.1.1), Lighting equipment (Mandatory),
is deleted.
54.
TABLE N1105.5.2(1), Specifications for the Standard Reference
and Proposed Designs, is amended to read as follows:
|
Table N1105.5.2(1) [R405.5.2(1)]
Specifications for the Standard Reference and Proposed
Designs
| ||
|---|---|---|
|
Building Component
|
Standard Reference Design
|
Proposed Design
|
|
Above-grade walls
|
Type: mass wall if proposed wall is mass; otherwise wood frame
|
As proposed
|
|
Gross area: same as proposed
|
As proposed
| |
|
U-factor: as specified in Table N1102.1.4
|
As proposed
| |
|
Solar absorptance = 0.75
|
As proposed
| |
|
Remittance = 0.90
|
As proposed
| |
|
Basement and crawl space walls
|
Type: same as proposed
|
As proposed
|
|
Gross area: same as proposed
|
As proposed
| |
|
U-factor: from Table N1102.1.4, with insulation layer on interior
side of walls
|
As proposed
| |
|
Above-grade floors
|
Type: wood frame
|
As proposed
|
|
Gross area: same as proposed
|
As proposed
| |
|
U-factor: as specified in Table N1102.1.4
|
As proposed
| |
|
Ceilings
|
Type: wood frame
|
As proposed
|
|
Gross area: same as proposed
|
As proposed
| |
|
U-factor: as specified in Table N1102.1.4
|
As proposed
| |
|
Roofs
|
Type: composition shingle on wood sheathing
|
As proposed
|
|
Gross area: same as proposed
|
As proposed
| |
|
Solar absorptance = 0.75
|
As proposed
| |
|
Emittance = 0.90
|
As proposed
| |
|
Attics
|
Type: vented with aperture = 1 ft2 per 300 ft2 ceiling area
|
As proposed
|
|
Foundations
|
Type: same as proposed
|
As proposed
|
|
Foundation wall area above and below grade and soil characteristics:
same as proposed
|
As proposed
| |
|
Opaque doors
|
Area: 40 ft2
|
As proposed
|
|
Orientation: North
|
As proposed
| |
|
U-factor: same as fenestration from Table N1102.1.4
|
As proposed
| |
|
Vertical fenestration other than opaque doors
|
Total areab = 15% of the conditioned
floor area
|
As proposed
|
|
Orientation: equally distributed to four cardinal compass orientations
(N, E, S & W)
|
As proposed
| |
|
U-factor: as specified in Table N1102.1.4
|
As proposed
| |
|
SHGC: as specified in Table N1102.1.2 except that for climates
with no requirement (NR) SHGC = 0.40 shall be used
|
As proposed
| |
|
Interior shade fraction: 0.92 - (0.21 x SHGC for the standard
reference design)
|
0.92 - (0.21 x SHGC as proposed)
| |
|
External shading: none
|
As proposed
| |
|
Skylights
|
None
|
As proposed
|
|
Thermally isolated sunrooms
|
None
|
As proposed
|
|
Air exchange rate
|
Air leakage rate of 5 air changes per hour in Climate Zones
1 and 2, and 3 air changes per hour in Climate Zones 3 through 8 at
a pressure of two tenths (0.2) inches w.g. (50 Pa). The mechanical
ventilation rate shall be in addition to the air leakage rate and
the same as in the proposed design, but no greater than 0.01 x CFA
+ 7.5 x (Nbr + 1)
where:
CFA = conditioned floor area
Nbr = number of bedrooms
Energy recovery shall not be assumed for mechanical ventilation.
|
For residences that are not tested, the same air leakage rate
as the standard reference design
For tested residences, the measured air exchange ratea.
The mechanical ventilation rateb shall
be in addition to the air leakage rate and shall be proposed.
|
|
Mechanical ventilation
|
None, except where mechanical ventilation is specified by the
proposed design, in which case:
Annual vent fan energy use:
kWh/yr = 0.03942 x CFA + 29.565 x (Nbr + 1)
where:
CFA = conditioned floor area
Nbr = number of bedrooms
|
As proposed
|
|
Internal gains
|
IGain = 17,900 + 23.8 x CFA + 4104 x Nbr (Btu/day per dwelling unit)
|
Same as standard reference design.
|
|
Internal mass
|
An internal mass for furniture and contents of 8 pounds per
square foot of floor area
|
Same as standard reference design, plus any additional mass
specifically designed as a thermal storage elementc but not integral to the building envelope or structure.
|
|
Structural mass
|
For masonry floor slabs, 80% of floor area covered by R-2 carpet
and pad, and 20% of floor directly exposed to room air
|
As proposed
|
|
For masonry basement walls, as proposed, but with insulation
required by Table R402.1.4 located on the interior side of the walls
|
As proposed
| |
|
For other walls, for ceilings, floors, and interior walls, wood
frame construction
|
As proposed
| |
|
Heating systemsd, e
|
Fuel type: same as the proposed design
Efficiencies:
Electric: air-source heat pump with prevailing Federal minimum
standards
Nonelectric Furnaces: natural gas furnace with prevailing Federal
minimum standards
Nonelectric boilers: natural gas boiler with prevailing Federal
minimum standards
Capacity: sized in accordance with Section N1103.7
|
As proposed
|
|
Cooling systemsd, f
|
Fuel type: electric
Efficiency: in accordance with prevailing
Federal minimum standards
Capacity: sized in accordance with Section
N1103.7
|
As proposed
|
|
Service water heatingd, e, f
|
Fuel type: same as proposed design
Efficiency: in accordance with prevailing Federal minimum standards
Use: gal/day = 30 +10 x Nbr Tank temperature:
120° F.
|
As proposed
Same as standard reference
|
|
Thermal distribution systems
|
Duct insulation: from Section N1103.2.1
A thermal distribution system efficiency (DSE) of 0.88 shall
be applied to both the heating and cooling system efficiencies for
all systems other than tested duct systems. For tested duct systems,
the leakage rate shall be 4 cfm (113.3 L/min) per 100 ft2 (9.29 m2) of conditioned
floor area at a pressure of differential of 0.1 inches w.g. (25 Pa)
|
As tested or specified in Table R405.5.2(2) if not tested. Duct
insulation shall be as proposed.
|
|
Thermostat
|
Type: Manual, cooling temperature setpoint = 75° F.;
Heating temperature setpoint = 72° F.
|
Same as standard reference
|
|
NOTES:
| |
|
For SI: 1 square foot = 0.93 m2,
1 British thermal unit = 1055 J, 1 pound per square foot = 4.88 kg/m2, 1 gallon (US) = 3.785 L, ° C. = (°F-32)/1.8,
1 degree = 0.79 rad
| |
|
a
|
Where required by the code official, testing shall be conducted
by an approved party, Hourly calculations as specified in the ASHRAE
Handbook of Fundamentals, or the equivalent shall be used to determine
the energy loads resulting from infiltration.
|
|
b
|
The combined air exchange rate for infiltration and mechanical
ventilation shall be determined in accordance with Equation 43 of
2001 ASHRAE Handbook of Fundamentals, page 26.24 and the "Whole-house
Ventilation" provisions of 2001 ASHRAE Handbook of Fundamentals, page
26.19 for intermittent mechanical ventilation.
|
|
c
|
Thermal storage element shall mean a component not part of the
floors, walls or ceilings that is part of a passive solar system,
and that provides thermal storage such as enclosed water columns,
rock beds, or phase-change containers. A thermal storage element must
be in the same room as fenestration that faces within fifteen degrees
(15°) (0.26 rad) of true south, or must be connected to such a
room with pipes or ducts that allow the element to be actively charged.
|
|
d
|
For a proposed design with multiple heating, cooling or water
heating systems using different fuel types, the applicable standard
reference design system capacities and fuel types shall be weighted
in accordance with their respective loads as calculated by accepted
engineering practice for each equipment and fuel type present.
|
|
e
|
For a proposed design without a proposed heating system, a heating
system with the prevailing Federal minimum efficiency shall be assumed
for both the standard reference design and proposed design.
|
|
f
|
For a proposed design home without a proposed cooling system,
an electric air conditioner with the prevailing Federal minimum efficiency
shall be assumed for both the standard reference design and the proposed
design.
|
|
g
|
For a proposed design with a nonstorage-type water heater, a
forty (40) gallon storage-type water heater with the prevailing Federal
minimum energy factor for the same fuel as the predominant heating
fuel type shall be assumed. For the case of a proposed design without
a proposed water heater, a forty (40) gallon storage-type water heater
with the prevailing Federal minimum efficiency for the same fuel as
the predominant heating fuel type shall be assumed for both the proposed
design and standard reference design.
|
55.
Section M1301.2, Identification, is amended to read as follows:
M1301.2 Identification. Each ten (10) foot length
of pipe and tubing and each pipe fitting utilized in a mechanical
system shall bear the identification of the manufacturer.
56.
Section M1305.1.3.1, Ground clearance, is amended to read as
follows:
M1305.1.3.1 Ground clearance. Equipment and appliances
supported from the ground shall be level and firmly supported on a
concrete slab or other approved material extending not less than two
(2) inches (50.8 mm) above the adjoining ground. Such support shall
be in accordance with the manufacturer's installation instructions.
Appliances suspended from the floor shall have a clearance of not
less than six (6) inches (152 mm) from the ground.
57.
Section M1305.1.3.3, Electrical requirements, is amended to
add one (1) exception to read as follows:
Exception: Basements
58.
Section M1307.2, Anchorage of appliances,
is amended to read as follows:
M1307.2 Anchorage of appliances. Appliances designed
to be fixed in position shall be fastened or anchored in an approved
manner. In Seismic Design Categories D0, D1 and D2, water heaters and thermal
storage units shall be anchored or strapped to resist horizontal displacement
caused by earthquake motion in accordance with one (1) of the following:
1.
Anchorage and strapping shall be designed to resist a horizontal
force equal to one-third (1/3) of the operating weight of the water
heater storage tank, acting in any horizontal direction. Strapping
shall be at points within the upper one-third (1/3) and lower one-third
(1/3) of the appliance's vertical dimensions. At the lower point,
the strapping shall maintain a minimum distance of four (4) inches
(102 mm) above the controls.
2.
The anchorage strapping shall be in accordance with the appliance
manufacturer's recommendations.
59.
Section M1401.3, Equipment and
appliance sizing, is amended to read as follows:
M1401.3 Equipment and appliance sizing. Heating
and cooling equipment and appliances shall be sized in accordance
with ACCA Manual J or other approved heating and cooling calculation
methodologies.
Exception: Heating and cooling equipment and appliance
sizing shall not be limited to the capacities determined in accordance
with Manual S where either of the following conditions applies
1.
The specified equipment or appliance utilizes multistage technology
or variable refrigerant flow technology and the loads calculated in
accordance with the approved heating and cooling calculation methodology
are within the range of the manufacturer's published capacities for
that equipment or appliance.
2.
The specified equipment or appliance manufacturer's published capacities
cannot satisfy both the total and sensible heat gains calculated in
accordance with the approved heating and cooling calculation methodology
and the next larger standard size unit is specified.
60.
M1411.6, Insulation of refrigerant piping, is amended to read
as follows:
M1411.6 Insulation of refrigerant piping. Piping
and fittings for refrigerant vapor (suction) lines shall be insulated
with insulation having a thermal resistivity of not less than R-2.83.
61.
Section M1501.1, Outdoor discharge,
is amended to read as follows:
M1501.1 Outdoor discharge. The air removed by every
mechanical exhaust system shall be discharged to the outdoors in accordance
with Section M1504.3. Air shall not be exhausted into an attic, soffit,
ridge vent or crawl space.
Exceptions:
62.
Section M1502.4.1, Material and size, is amended to read as
follows:
M1502.4.1 Material and size. Exhaust ducts shall
have a smooth interior finish and be constructed of metal having a
minimum thickness of 0.0157 inch (0.3950 mm) (No. 30 gage). The duct
shall be four (4) inches (102 mm) nominal in diameter.
63.
Section M1502.4.2, Duct installation, is amended to read as
follows:
M1502.4.2 Duct installation. Exhaust ducts shall
be supported at intervals not to exceed twelve (12) feet (3,658 mm)
and shall be secured in place. The insert end of the duct shall extend
into the adjoining duct or fitting in the direction of airflow. Exhaust
duct joints shall be sealed in accordance with Section M1601.4.1 and
shall be mechanically fastened, i.e., foil tape or equivalent. Ducts
shall not be joined with screws or similar fasteners that protrude
more than 1/8 inch (3.2 mm) into the inside of the duct.
64.
Section M1503.6, Makeup air required, is amended to read as
follows:
M1503.6 Makeup air required. Exhaust hood systems
capable of exhausting in excess of six hundred (600) cubic feet per
minute shall be mechanically or naturally provided with makeup air
at a rate approximately equal to the exhaust air rate. Such makeup
air systems shall be equipped with a means of closure and shall be
automatically controlled to start and operate simultaneously with
the exhaust system.
65.
Section M1504.3, Exhaust openings,
is amended to read as follows:
M1504.3 Exhaust openings. Air exhaust openings
shall terminate as follows:
1.
Not less than three (3) feet (914 mm) from gravity air intake openings,
operable windows and doors.
2.
Not less than ten (10) feet (3,048 mm) from mechanical air intake
openings except where the exhaust opening is located not less than
three (3) feet (914 mm) above the air intake opening. Openings shall
comply with Sections R303.5.2 and R303.6.
66.
Table M1601.1.1, Duct Construction Minimum Sheet Metal Thickness
for Single Dwelling Units, is amended to read as follows:
|
Table M1601.1.1
Duct Construction Minimum Sheet Metal Thickness for Single Dwelling
Unitsa
| ||||
|---|---|---|---|---|
|
Round Duct Diameter
(inches)
|
Static Pressure
| |||
|
1/2 inch water gage
|
1 inch water gage
| |||
|
Thickness (inches)
|
Thickness (inches)
| |||
|
Galvanized
|
Aluminum
|
Galvanized
|
Aluminum
| |
|
< 12
|
0.013
|
0.018
|
0.013
|
0.018
|
|
12 to 14
|
0.013
|
0.018
|
0.016
|
0.023
|
|
15 to 17
|
0.016
|
0.023
|
0.019
|
0.027
|
|
18
|
0.016
|
0.023
|
0.024
|
0.034
|
|
19 to 20
|
0.019
|
0.027
|
0.024
|
0.034
|
|
Rectangular Duct Dimension
(largest dimension)
|
Static Pressure
| |||
|---|---|---|---|---|
|
1/2 inch water gage
|
1 inch water gage
| |||
|
Thickness (inches)
|
Thickness (inches)
| |||
|
Galvanized
|
Aluminum
|
Galvanized
|
Aluminum
| |
|
< 8
|
0.013
|
0.018
|
0.013
|
0.018
|
|
9 to 10
|
0.013
|
0.018
|
0.016
|
0.023
|
|
11 to 12
|
0.016
|
0.023
|
0.019
|
0.027
|
|
13 to 16
|
0.016
|
0.027
|
0.019
|
0.027
|
|
17 to 18
|
0.019
|
0.027
|
0.024
|
0.034
|
|
19 to 20
|
0.019
|
0.034
|
0.024
|
0.034
|
|
NOTES:
| |
|
For SI: 1 inch = 25.4 mm, 1 inch water gage = 249 Pa.
| |
|
a.
|
Ductwork that exceeds twenty (20) inches by dimension or exceeds
a pressure of one (1) inch water gage shall be constructed in accordance
with SMACNA HVAC Duct Construction Standards - Metal and Flexible.
|
67.
Section M1601.4.1, Joints, seams
and connections, is amended to read as follows:
M1601.4.1 Joints, seams and connections. Joints
of duct systems shall be made substantially airtight in an unconditioned
area by means of tapes, mastics, liquid sealants, gasketing or other
approved closure systems. Closure systems used with rigid fibrous
glass ducts shall comply with UL 181A and shall be marked 181A-P for
pressure-sensitive tape, 181A-M for mastic or 181A-H for heat-sensitive
tape. Closure systems used with flexible air ducts and flexible air
connectors shall comply with UL 181B and shall be marked 181B-FX for
pressure-sensitive tape or 181B-M for mastic. Duct connections to
flanges of air distribution system equipment or sheet metal fittings
shall be mechanically fastened. Mechanical fasteners for use with
flexible nonmetallic air ducts shall comply with UL 181B and shall
be marked 181B-C. Crimp joints for round metal ducts shall have a
contact lap of at least 1 1/2 means of at least three (3) sheet
metal screws or rivets equally spaced around the joint. Closure systems
used to seal metal ductwork shall be installed in accordance with
the manufacturer's installation instructions.
Exceptions:
1.
Spray polyurethane foam shall be permitted to be applied without
additional joint seals.
2.
Where a duct connection is made that is partially inaccessible, three
(3) screws or rivets shall be equally spaced on the exposed portion
of the joint so as to prevent a hinge effect.
3.
For ducts having a static pressure classification of less than two
(2) inches of water column (500 Pa), additional closure systems shall
not be required for continuously welded joints and seams and locking-type
joints and seams of other than snap-lock and button-lock types.
68.
Sections M2101.16, CPVC plastic pipe, and M2101.16.1, Threaded
joints, are deleted.
69.
M2101.26, Pipe penetrations, is amended to read as follows:
M2101.26 Pipe penetrations. Openings for pipe penetrations
in walls, floors and ceilings shall be larger than the penetrating
pipe. Openings in the foundation wall underground shall be sealed
to not allow groundwater into a building.
70.
Section G2408.4(305.7), Clearances from grade, is amended to
read as follows:
G2408.4 (305.7) Clearances from grade. Equipment
and appliances installed at grade level shall be supported on a level
concrete slab or other approved material extending not less than two
(2) inches (50.8 mm) above adjoining grade or shall be suspended not
less than six (6) inches (152 mm) above adjoining grade. Such supports
shall be installed in accordance with the manufacturer's installation
instructions.
71.
Section P2503.5.1, Rough plumbing,
is amended to read as follows:
P2503.5.1 Rough plumbing. DWV systems shall be
tested on completion of the rough piping installation by water or
by air without evidence of leakage. Either test shall be applied to
the drainage system in its entirety or in sections after rough-in
piping has been installed, as follows:
1.
Water test. Each section shall be filled with water to a point not
less than five (5) feet (1,524 mm) above the highest fitting connection
in that Section, or to the highest point in the completed system.
Water shall be held in the Section under test for a period of fifteen
(15) minutes. The system shall prove leak free by visual inspection.
2.
Air test. The portion under test shall be maintained at a gauge pressure
of five (5) pounds per square inch (psi) (34 kPa) or ten (10) inches
of mercury column (34 kPa). This pressure shall be held without introduction
of additional air for a period of fifteen (15) minutes.
72.
P2801.8, Water heater seismic bracing, is amended to read as
follows:
P2801.8 Water heater seismic bracing. In Seismic Design Categories
D0, D1 and D2 water heaters shall be anchored or strapped in the
upper one-third (1/3) and in the lower one-third (1/3) of the appliance
to resist a horizontal force equal to one-third (1/3) of the operating
weight of the water heater, acting in any horizontal direction, or
in accordance with the appliance manufacturer's recommendations.
73.
Section P3201.2.1, Trap seal protection, is amended to add an
exception to read as follows:
Exception: Basement floor drains will be allowed
to have a deep seal.
74.
Section E3601.8, Emergency disconnects, is to be deleted.
75.
Sections E3606.5 through E3606.5.3, Surge protection, are to
be deleted.
76.
Section E3902.2, Garage and accessory building receptacles,
is amended to read as follows:
E3902.2 Garage and accessory building receptacles. 125-volt, single-phase, 15- or 20-ampere receptacles installed in
garages and grade-level, portions of unfinished accessory buildings
used for storage or work areas shall have ground-fault circuit-interrupter
protection for personnel. [210.8(A)(2)]
Exception:
Garage door opener receptacles not installed in a readily accessible
location.
77.
Section E3902.5, Basement receptacles,
is amended to read as follows:
E3902.5 Basement receptacles. All 125-volt receptacles
installed in basements and supplied by single-phase branch circuits
shall have ground-fault circuit-interrupter protection for personnel.
[210.8(A)(5)]
Exceptions:
1.
A receptacle supplying only a permanently installed fire alarm or
burglar alarm system. Receptacles installed in accordance with this
exception shall not be considered as meeting the requirement of Section
E3901.9. [210.8(A)(5) Exception]
2.
Fastened in place appliances or single plugged receptacle designated
for refrigerators/freezers.
3.
Sump pump: Sump pump receptacles must be a single dedicated outlet
(not a duplex) and only when a sump pump has been installed.
78.
Section E3902.6, Kitchen receptacles, is amended to add an exception
to read as follows:
Exception:Fastened in place appliances or outlets
designated for refrigerators/freezers.
79.
Section E3902.9, Laundry areas, is amended to read as follows:
E3902.9 Laundry areas. 125-volt, single-phase,
15- and 20-ampere receptacles installed in laundry areas shall have
ground-fault circuit interrupter protection for personnel. [210.8(A)(10)]
80.
Section E3902.11, Kitchen dishwater branch circuit, is deleted.
81.
Section P3902.17, Arc-fault
circuit interrupter protection, is amended to read as follows:
E3902.17 Arc-fault circuit-interrupter protection.Branch circuits that supply 120-volt, single phase, 15- and 20-ampere
outlets installed in, family rooms, dining rooms, living rooms, parlors,
libraries, dens, bedrooms, sunrooms, recreations rooms, closets, hallways,
and similar rooms or areas shall be protected by any of following:
[210.12(A)]
1.
A listed combination-type arc-fault circuit interrupter, installed
to provide protection of the entire branch circuit. [210.12(A)(1)]
2.
A listed branch/feeder-type AFCI installed at the origin of the branch-circuit
in combination with a listed outlet branch-circuit type arc-fault
circuit interrupter installed at the first outlet box on the branch
circuit. The first outlet box in the branch circuit shall be marked
to indicate that it is the first outlet of the circuit. [210.12(A)(2)]
3.
A listed supplemental arc-protection circuit breaker installed at
the origin of the branch circuit in combination with a listed outlet
branch-circuit type arc-fault circuit-interrupter installed at the
first outlet box on the branch circuit where all of the following
conditions are met:
a.
The branch-circuit wiring shall be continuous from the branch-circuit
overcurrent device to the outlet branch-circuit arc-fault circuit
interrupter.
b.
The maximum length of the branch-circuit wiring from the branch-circuit
overcurrent device to the first outlet shall not exceed fifty (50)
feet (15.2 m) for 14 AWG conductors and seventy (70) feet (21.3 m)
for 12 AWG conductors.
c.
The first outlet box in the branch circuit shall be marked to indicate
that it is the first outlet on the circuit. [210.12(A)(3)]
4.
A listed outlet branch-circuit-type arc-fault circuit interrupter
installed at the first outlet on the branch circuit in combination
with a listed branch-circuit overcurrent protective device where all
of the following conditions are met:
a.
The branch-circuit wiring shall be continuous from the branch-circuit
overcurrent device to the outlet branch-circuit arc-fault circuit
interrupter.
b.
The maximum length of the branch-circuit wiring from the branch-circuit
overcurrent device to the first outlet shall not exceed fifty (50)
feet (15.2 m) for 14 AWG conductors and seventy (70) feet (21.3 m)
for 12 AWG conductors.
c.
The first outlet box in the branch circuit shall be marked to indicate
that it is the first outlet on the circuit.
d.
The combination of the branch-circuit overcurrent device and outlet
branch-circuit AFCI shall be identified as meeting the requirements
for a system combination-type AFCI and shall be listed as such. [210.12(A)(4)]
5.
Where metal raceways, metal wireways, metal auxiliary gutters or
Type MC or Type AC cable meeting the applicable requirements of Section
E3908.9 with metal boxes, metal conduit bodies and metal enclosures
are installed for the portion of the branch circuit between the branch-circuit
overcurrent device and the first outlet, a listed outlet branch-circuit
type AFCI installed at the first outlet shall be considered as providing
protection for the remaining portion of the branch circuit. [210.12(A)(5)]
6.
Where a listed metal or nonmetallic conduit or tubing or Type MC
cable is encased in not less than two (2) inches (50.8 mm) of concrete
for the portion of the branch circuit between the branch-circuit overcurrent
device and the first outlet, a listed outlet branch-circuit type AFCI
installed at the first outlet shall be considered as providing protection
for the remaining portion of the branch circuit. [210.12(A)(6)]
|
Exception:
| |
|
•
|
AFCI protection shall not be required for an individual branch
circuit supplying a fire alarm system where the branch circuit is
installed in a metal raceway, metal auxiliary gutter, steel-armored
cable, Type MC or Type AC, meeting the requirements of Section E3908.9,
with metal boxes, conduit bodies and enclosures.
|
|
•
|
AFCI protection shall not be required for all kitchen countertop
receptacles, laundry receptacles and/or other already required GFCI
protected outlets.
|
82.
Section E3902.18, Arc-fault circuit
interrupter protection for branch circuit extensions or modifications,
is amended to read as follows:
E3902.18 Arc-fault circuit interrupter protection for
branch circuit extensions or modifications. Where branch-circuit
wiring is modified, replaced, or extended in any of the areas specified
in Section E3902.17, the branch circuit shall be protected by one
of the following:
1.
A combination-type AFCI located at the origin of the branch circuit.
2.
An outlet branch-circuit type AFCI located at the first receptacle
outlet of the existing branch circuit. [210.12(B)]
|
Exception: AFCI protection shall not be required
where the extension of the existing branch circuit conductors is not
more than thirty (30) feet (9.5 m) in length and does not include
any additional outlets or devices other than splicing devices. This
measurement shall not include the conductors inside an enclosure,
cabinet or junction box. [210.12(B) Exception]
|
83.
Section E4002.14, Tamper resistant receptacles, is deleted.
[1]
Note: The insulation shall be along the perimeter
of the foundation wall downward from the slab a minimum distance of
24 inches or horizontally under the slab for a minimum of 24 inches.
[R.O. 2011 § 500.085]
Any person who shall violate any
provision of the code adopted in this Article or shall fail to comply
with any of the requirements thereof or who shall erect, construct,
alter or repair a building or structure in violation of an approved
plan of or directive of the Code Official, or of a permit or certificate
issued under the provision of this code, shall be guilty of an ordinance
violation, punishable by a fine of not more than five hundred dollars
($500.00) or by imprisonment not exceeding three (3) months, or both
such fine and imprisonment. Each day that a violation continues after
due notice has been served shall be deemed a separate offense.
