EDITORIAL CHANGES – SECOND PRINTING
Page 7, Section R109.1.2: Exception line 3 now reads . . .M2105.28 prior to inspection shall be permitted.
Page 8, R110.2: line 3 now reads . . .tions 407 and 408 of the International Existing Building Code.
Page 41, FIGURE R301.2(5) notes now read . . .For SI: 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa, 1 mile = 1.61 km.
a.In CS areas, site-specific Case Studies are required to establish ground snow loads. Extreme local variations in ground snow loads in theses areas preclude mapping at this scale.
b.Numbers in parentheses represent the upper elevation limits in feet for the ground snow load values presented below. Site-specific case studies are required to establish ground snow loads at elevations not covered.
Page 56, Section R303.7.1 has been deleted.
Page 56, Section R303.9 now reads . . .R309.9 Required glazed openings. Required glazed openings shall open directly onto a street or public alley, or a yard or court located on the same lot as the building.
1.Required glazed openings that face into a roofed porch where the porch abuts a street, yard or court and the longer side of the porch is not less than 65 percent unobstructed and the ceiling height is not less than 7 feet (2134 mm).
2.Eave projections shall not be considered as obstructing the clear open space of a yard or court.
3.Required glazed openings that face into the area under a deck, balcony, bay or floor cantilever where a clear vertical space not less than 36 inches (914 mm) in height is provided.
Page 56, Section 303.8.1 is renumbered and now reads . . .Section 303.9.1.
Page 56, Section 303.9 is renumbered and now reads . . .Section 303.10.
Page 62, Section R310.2.5 has been added.
Page 74, Section R322.2.1: Items 1 and 2 now read . . .
1.Buildings and structures in flood hazard areas, including flood hazard areas designated as Coastal A Zones, shall have the lowest floors elevated to or above the base flood elevation plus 1 foot (305 mm), or the design flood elevation, whichever is higher.
2.In areas of shallow flooding (AO Zones), buildings and structures shall have the lowest floor (including basement) elevated to a height above the highest adjacent grade of not less than the depth number specified in feet (mm) on the FIRM plus 1 foot (305 mm), or not less than 3 feet (915 mm) if a depth number is not specified.
Page 75, Section R322.2.2: Item 2.3 has been added and now reads . . .
2.3.The presence of louvers, blades, screens and faceplates or other covers and devices shall allow the automatic flow of floodwater into and out of the enclosed areas and shall be accounted for in the determination of the net open area.
Page 75, R322.214.171.124: Item 1, line 4 now reads . . .flood elevation, each area shall have openings.
Page 75, Section R322.3.2: line 3 now reads . . .so that the bottom of the lowest horizontal structural
Page 76, Section R322.3.4: Item 4 now reads . . .4. Where wind loading values of this code exceed 20 pounds per square foot (958 Pa), as determined using allowable stress design, the construction documents shall include documentation prepared and sealed by a registered design professional that:
Page 76, Section R322.3.4: Item 6 have been deleted.
Page 77, Section R324.3: line 3 now reads . . .through R324.6.1 and NFPA 70. Inverters shall be listed and
Page 77, Sections R324.7 through R3126.96.36.199 have been deleted.
Page 77, Section R325.5: line 3 now reads . . .walls not more than 36 inches (914 mm) in height, columns
Page 77, Section R325.5: Exception 2 now reads . . .2. In buildings that are not more than two stories above grade plane and equipped throughout with an automatic sprinkler system in accordance with Section R313, a mezzanine shall not be required to be open to the room in which the mezzanine is located.
Page 86, FIGURE R403.1(2) reads as shown.
Page 88, FIGURE R403.1.3: subfigure 5 reads as shown.
Page 92, FIGURE R403.3(1): top figure, lower left callout reads as shown.
Page 106, TABLE R404.1.2(1): Note b now reads . . .b. See Section R404.1.3.2 for minimum reinforcement required for foundation walls supporting above-grade concrete walls.
Page 123, Section R502.2.2: lines 4-6 now read . . .grade lumber, No. 4 common grade boards or wood structural panels as specified in Section R503.2. Fireblocking shall be of any grade lumber.
Page 150, TABLE R507.2: Note a now reads . . .a. Ledgers shall be flashed in accordance with Section R703.4 to prevent water from contacting the house band joist.
Page 152, FIGURE R507.2.3(2): 7th callout on the right line 3 now reads . . .ALONG DECK AND ONE WITHIN 24” OF EACH
Page 170, TABLE R602.7(1): Note b now reads . . .b. No. 1 or better grade lumber shall be used for southern pine. Other tabulated values assume #2 grade lumber.
Page 171, TABLE R602.7(2): Note b now reads . . .b. No. 1 or better grade lumber shall be used for southern pine. Other tabulated values assume #2 grade lumber.
Page 172, FIGURE R602.7.2 reads as shown.
Page 177, Section R602.10.4.1: Item 2, line 4 now reads . . .Design Categories A, B and C where the ultimate
Page 180 TABLE R602.10.33(1): column 1, row 3 now reads . . .< 140
Page 184, TABLE R602.10.3(4): column 2, row 8, line 5 now reads . . .in SDC D0 – D2d, f
Page 186, TABLE R602.10.4: Note c now reads . . .c. Garage openings adjacent to a Method CS-G panel shall be provided with a header in accordance with Table R602.5(1). A full-height clear opening shall not be permitted adjacent to a Method CS-G panel.
Page 188, Section R602.10.6.5: paragraph 2, line 3 now reads . . .accordance with Section R703.8, and the veneer does
Page 188, Section R602.10.6.5: paragraph 3, line 4 now reads . . .R703.8, and the veneer exceeds the first-story height,
Page 195, Section R602.10.8.2: Item 2, line 1 now reads . . .For Seismic Design Categories D0, D1 and D2,
Page 197, FIGURE R602.10.8.2(3) reads as shown.
Page 239, Section R603.9.4.1: line 6 now reads . . .S230, Section F7.2, as required for 139 miles per hour
Page 261, Section R608.5.4.2: line 3 now reads . . .above-grade walls, see Sections R404.1.3.3.7.2 and
Page 342, TABLE R702.1(3): column 5, row 4 now reads . . .1
Page 342, TABLE R702.1(3): column 6, row 4 is now blank
Page 347, TABLE R703.3(1): column1, row 6 now reads . . .Hardboard panel siding (see Section R703.5)
Page 347, TABLE R703.3(1): column1, row 7 now reads . . .Hardboard lap siding (see Section R703.5)
Page 348, TABLE R703.3(1)—continued: column 1, row 4 now reads . . .Wood siding (see Section R703.5)
Page 348, TABLE R703.3(1)—continued: column 1, row 5 now reads . . .Wood structural panel ANSI/APA PRP-210 siding (exterior grade) (see Section R703.5)
Page 348, TABLE R703.3(1)—continued: column 1, row 6 now reads . . .Wood structural panel lap siding (see Section R703.5)
Page 350, Section R703.5: lines 3 and 4 now read . . .be installed in accordance with this section and Table R703.3(1). Hard-board siding shall comply with CPA/ANSI
Page 351, Section R703.7.1: lines 5 and 6 now read . . .long (22.2 mm), 16 gage staples, spaced not more than 6 inches (152 mm), or as otherwise approved.
Page 358, Section R703.9.1: Item 3, line 2 now reads . . .with the requirements of Section R703.4.
Page 358, Section R703.9.2: Item 6, line 2 now reads . . .accordance with the requirements of Section R703.4.
Page 360, Section R703.12.3: line 4 now reads . . .R703.7.3. The water-resistive barrier shall lap over the
Page 365, Section R802.1.1.1: line 3 now reads . . .to Section R802.1.1 shall be permitted to be used inter-
Page 365, Section R802.1.5.3: line 5 now reads . . .Section R802.1.5. Testing of only the front and back
Page 418, Section R905.2.8.5: line 11 now reads . . .drip edge along rake edges.
Page 435, FIGURE R1003.18: callout on the right reads as shown.
Page 438, definition HISTORIC BUILDING now reads . . .HISTORIC BUILDING. Any building or structure that is one or more of the following:
1.Listed, or certified as eligible for lising by the State Historic Preservation Officer or the Keeper of the National Register of Historic Places, in the National Register of Historic Places.
2.Designated as historic under an applicable state or local law.
3.Certified as a contributing resource within a National Register-listed, state-designated or locally designated historic distsrict.
Page 454, Section N1101.10.3 now reads as shown:
N1101.10.3 (R303.1.3) Fenestration product rating. U-factors of fenestration products (windows, doors and skylights) shall be determined in accordance with NFRC 100.
Exception: Where required, garage door U-factors shall be determined in accordance with either NFRC 100 or ANSI/DASMA 105.
U-factors shall be determined by an accredited, independent laboratory, and labeled and certified by the manufacturer.
Products lacking such a labeled U-factor shall be assigned a default U-factor from Table N1101.10.3(1) or N1101.10.3(2). The solar heat gain coefficient (SHGC) and visible transmittance (VT) of glazed fenestration products (windows, glazed doors and skylights) shall be determined in accordance with NFRC 200 by an accredited, independent laboratory, and labeled and certified by the manufacturer. Products lacking such a labeled SHGC or VT shall be assigned a default SHGC or VT from Table N1101.10.3(3).
Page 455, Section N1101.13.1: Item 9, line 2 now reads . . .directions have operable fenestration on exterior
Page 455, Section N1102.1: line 3 now reads . . .N1102.1.1 through N1102.1.5.
Page 458, Section N1102.3: line 3 now reads . . .ply with Sections N1102.3.1 through N1102.3.5.
Page 459, Section N1102.4: lines 3 and 4 now read . . .accordance with the requirements of Sections N1102.4.1 through N1102.4.5.
Page 461, Section N1003.3.3: Item 2 and Exception now read as shown:
2.Postconstruction test: Total leakage shall be measured with a pressure differential of 0.1 inch w.g. (25 Pa) across the entire system, including the manufacturer’s air handler enclosure. Registers shall be taped or otherwise sealed during the test.
Exception: A duct air leakage test shall not be required where the ducts and air handlers are located entirely within the building thermal envelope.
Page 462, Section N1103.5: line 3 now reads . . .accordance with Sections N1103.5.1 through N1103.5.4.
Page 462, Section N1103.5.3: Item 6 now reads . . .6. Buried piping.
Page 463, Section N1103.10: line 4 now reads . . .N1103.10.1 through N1103.10.3.
Page 463, Section N1103.10.1 has been deleted.
Page 463, Section N1103.10.2 title now reads . . .N1103.10.1 (R403.10.1) Heaters.
Page 463, Section N1103.10.3 title now reads . . .N403.10.2 (R403.10.2) Time switches.
Page 463, Section N1103.10.4 title now reads . . .N1103.10.3 (R403.10.3) Covers.
Page 465, TABLE N1105.5.2(1): column 2, row 6 now reads . . .Emittance = 0.90
Page 465, TABLE N1105.5.2(1): column 2, row 26, line 1 now reads . . .Total areah =
Page 466, TABLE N1105.5.2.(1)—continued: Note h has been added and reads as shown:
h.For residences with conditioned basements, R-2 and R-4 residences and townhouses, the following formula shall be used to determine glazing area:
AF = Total glazing area. As = Standard reference design total glazing area. FA = (Above-grade thermal boundary gross wall area)/(above-grade boundary wall area + 0.5 × below-grade boundary wall area). F = (Above-grade thermal boundary wall area)/(above-grade thermal boundary wall area + common wall area) or 0.56, whichever is greater.
Thermal boundary wall is any wall that separates conditioned space from unconditioned space or ambient conditions. Above-grade thermal boundary wall is any thermal boundary wall component not in contact with soil.
Below-grade boundary wall is any thermal boundary wall in soil contact.
Common wall area is the area of walls shared with an adjoining dwelling unit.
L and CFA are in the same units.
Page 467, Section N1106.2: paragraph 1 now reads . . .N1106.2 (R406.2) Mandatory requirements. Compliance with this section requires that the mandatory provisions identified in Sections N1101.13 through N1104 identified as “mandatory” and Section N1103.5.3 be met. The building thermal envelope shall be greater than or equal to levels of efficiency and Solar Heat Gain Coefficient in Table 402.1.1 or 402.1.3 of the 2009 International Energy Conservation Code.
Page 468, Section N1106.7.1: Item 1 now reads . . .
1.Computer generation of the ERI reference design using only the input for the rated design.
The calculation procedure shall not allow the user to directly modify the building component characteristics of the ERI reference design.
Page 469, Section N1188.8.131.52: Exception, line 4 now reads . . .in Section N1102.1.5, of the existing building and
Page 470, Section N1109.1.1: line 5 now reads . . .and N1102.4.5.
Page 470, Section N1184.108.40.206: line 6 now reads . . .SHGC as provided in Table N1102.1.2.
Page 485, Section M1501.1: line 3 now reads . . .doors in accordance with Section M1506.3. Air shall not be
Page 486, Section M1502.4.5.2: line 8 now reads . . .clothes dryer manufacturer, Table M1502.4.5.1 shall be
Page 492, Section M1602.2: Item 4 and the following paragraphs now read as shown:
4.Return air shall not be taken from a closet, bathroom, toilet room, kitchen, garage, mechanical room, boiler room, furnace room or unconditioned attic.
1.Taking return air from a kitchen is not prohibited where such return air openings serve the kitchen only, and are located not less than 10 feet (3048 mm) from the cooking appliances.
2.Dedicated forced-air systems serving only the garage shall not be prohibited from obtaining return air from the garage.
5.Taking return air from an unconditioned crawl space shall not be accomplished through a direct connection to the return side of a forced-air furnace. Transfer openings in the crawl space enclosure shall not be prohibited.
6.Return air from one dwelling unit shall not be discharged into another dwelling unit.
Page 509, Section M2201.6 now reads . . .M2201.6 Flood-resistant installation. In flood hazard areas as established by Table R301.2(1), tanks shall be installed in accordance with Section R322.2.4 or R322.3.7.
Page 580, TABLE G2428.3(1): table application box now reads . . .
Number of Appliances Two or more Appliance Type Category I Appliance Vent Connection Type B double-wall connector
Page 581, TABLE G2428.3(2): table application box now reads . . .
Number of Appliances Two or more Appliance Type Category I Appliance Vent Connection Single-wall metal connector
Page 597, Section P2705.1: Item 7, line 3 now reads . . .dance with Section R322.1.6.
Page 599, Section P2706.3 title now reads . . .P2706.2 Prohibited waste receptors.
Page 603, Section P2801.6.1: line 7 now reads . . .indicated in Table P2906.5. Where a pan drain was not
Page 603, Section P2802.1: line 7 now reads . . .uses shall comply with Section P2803.2. A temperature-indi-
Page 614, FIGURE P2904.2.4.2: top table, column 2, row 1 now reads . . .”B” MUST BE NOT LESS THAN (FEET)
Page 614, FIGURE P2904.2.4.2: middle table, column 2, row 1 now reads . . .”B” MUST BE NOT LESS THAN (FEET)
Page 614, FIGURE P2904.2.4.2: bottom table, column 2, row 1 now reads . . .”B” MUST BE NOT LESS THAN (FEET)
Page 624, Section P2906.9.1.3: line 3 now reads . . .P2906.9.1.4.
Page 641, Section P3005.2.5: Exceptions now read . . .
1.A removable P-trap with slip or ground joint connections can serve as a cleanout for drain piping that is one size larger than the P-trap size.
2.Cleanouts located on stacks can be one size smaller than the stack size.
3.The size of cleanouts for cast-iron piping can be in accordance with the referenced standards for cast iron fittings as indicated in Table P3002.3.
Page 658, Section E3402.2: line 10 now reads . . .Section R302.4. (300.21)
Page 672, Section E3603.1.1: title now reads . . .E3603.1.1 Ungrounded service conductors.
Page 672, Section E3603.1.2: title now reads . . .E3603.1.2 Ungrounded feeder conductors.
Page 672, Section E3603.1.3: title now reads . . .E3603.1.3 Feeder size relative to service size.
Page 672, Section E3603.1.4: title now reads . . .E3603.1.4 Grounded conductors.
Page 698, Section E3902.16: Item 6 and Exception now read as shown:
6.Where a listed metal or nonmetallic conduit or tubing or Type MC cable is encased in not less than 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 is not required for an individual branch circuit supplying only a fire alarm system where the branch circuit is wired with metal outlet and junction boxes and RMC, IMC, EMT or steel-sheathed armored cable Type AC or Type MC meeting the requirements of Section E3908.8.
Page 716, Section E3906.11: line 4 now reads . . .ble material where required by Section E4004.2. [314.25(B)]
Page 727, Section E4004.2: line 5 now reads . . .ered with a noncombustible material. (410.23)
Page 729, Section E4101.6: line 5 now reads . . .E3905.8. (422.18)
Page 736, Section E4203.6: line 2 now reads . . .installed with the clearances specified in Table E4203.6, the
Page 736, Section E4203.6: paragraph 2, line 3 now reads . . .Table E4203.6 for conductors operating at 0 to 750 volts to
Page 737, Section E4204.2: Exception 1.4, line 1 now reads . . .The top rim of the spa or hot tub is not
Page 749, Referenced Standard ANSI: reference number Z21.88/CSA 2.33—15 now reads . . .Z21.88/CSA 2.33—14
Page 750, Referenced Standard ASCE/SEI: reference number 24—13 now reads . . .24—14
Page 762, Referenced Standard AWC: reference standard ANSI AWC NDS—2015 title, line 2 now reads . . . with 2015 Supplement
Page 762, Referenced Standard AWC: reference number AWC PWF—2015 now reads . . . ANSI/AWC PWF—2015
Page 770, Referenced Standard SMACNA: reference standard SMACNA—15 title now reads . . . HVAC Duct Construction Standards, Metal and Flexible (2005)
Page 813, APPENDIX F now reads as shown.
Page 873, APPENDIX R: Section AR103.2.2 now reads . . .AR103.2.2 Bracing. Wind bracing shall be in accordance with Section R602.10 and shall use Method LIB. Walls with light straw-clay infill shall not be sheathed with solid sheathing.
Page 874, Section AR103.5.2: line 7 now reads . . .dance with Section AR103.5.4. Plasters shall have a thick-Page 876, Section AS103.6: line 3 now reads . . .AS103.3.
Page 877, Section AS104.4.8: lines 2 and 3 now read . . to ASTM C 926 and shall comply with Sections R703.7.2, R703.7.4 and R703.7.5, except that the amount of lime in
Page 878, Section AS105.6.8: line 6 now reads . . .dance with Section R703.7.3.
Page 879, Section AS106.10: line 7 now reads . . .screed as described in Section R702.7.2.1 is not an acceptable
Page 886, TABLE T301.1(3): column 1, row 1 now reads . . .CARBON MONOXIDE LEVEL (ppm)
Page 900, Index: SWIMMING POOLS now reads . . .SWIMMING POOLS . . .R326, Chapter 42
2015 International Residential Code