2015 IRC Transition from the 2009 IRC Copyright 2015 International Code Council 1 2015 IRC Transition from the 2009 IRC 2015 IRC Transition from the 2009 IRC Based on the International Residential Code ® (IRC ® ) Marginal Markings in the IRC Marginal Markings in the IRC 2 ▌ solid vertical line technical change arrow deletion * single asterisk relocated elsewhere ** double asterisk relocated here Errata – iccsafe.org/errata-central/ Errata – iccsafe.org/errata-central/ iccsafe.org/ errata- central/ Errata page 3 Scope and Administration (Chapter 1) Scope and Administration (Chapter 1) Part 1 4
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2015 IRC Transition from the 2009 IRC
Copyright 2015 International Code Council 1
2015 IRC Transition from the 2009 IRC2015 IRC Transition from the 2009 IRCBased on the International Residential Code® (IRC®)
Marginal Markings in the IRCMarginal Markings in the IRC
2015 R104.11 Alternative Materials, Design, and Methods of Construction and EquipmentR104.11 Alternative Materials, Design, and Methods of Construction and Equipment
Reason for disapproval in writing by the building official.
2015 IRC Transition from the 2009 IRC 6
2015
R105.2 Fences Exempt from PermitR105.2 Fences Exempt from Permit• Fences ≤ 7 feet high
Determination of substantial improvement by building official
Related provisions consolidated in R105.3.1.1.
2015 IRC Transition from the 2009 IRC 8
2015
2015 IRC Transition from the 2009 IRC
Copyright 2015 International Code Council 3
R106.1.4 Information for Construction in Flood Hazard AreasR106.1.4 Information for Construction in Flood Hazard Areas Construction documents
for Coastal A Zones Special hazard area landward
of V Zone (wave < 3 ft.) Include elevation of the bottom
of lowest horizontal structural member
Same as high hazard Zone V R322.3 Coastal high-hazard
areas
2015 IRC Transition from the 2009 IRC 9
2015
Building Planning (Chapter 3)Building Planning (Chapter 3)
Part 2
10
Table R301.2(1) Climatic and Geographic Design CriteriaTable R301.2(1) Climatic and Geographic Design Criteria The jurisdiction must indicate if it contains
special wind regions or wind borne debris zones
2015 IRC Transition from the 2009 IRC 11
2015Wind Design Criteria Wind Design Criteria 2012 IRC 2015 IRC R301.2.1 R301.2 A new map indicates the geographic locations that require wind design.
R301.2.1.2 Protection of Openings in Wind Borne Debris RegionsR301.2.1.2 Protection of Openings in Wind Borne Debris Regions Prescriptive attachment
provisions for wood structural panels:
Mean roof height limit increased from 33 to 45 ft.
To permit on 3-story buildings
2015 IRC Transition from the 2009 IRC 17
2015 R301.2.1.4 Wind Exposure CategoryR301.2.1.4 Wind Exposure Category Wind Exposure Category A deleted Wind Exposure Category D: Unobstructed areas ≥5,000 ft.: Open water Mud and salt flats Unbroken ice fields Includes hurricane-prone regions.
2015 IRC Transition from the 2009 IRC 18
2015
R301.3 Story Height R301.3 Story Height Story height 11 ft 7in.: Wood and steel wall
6 feet, 4 inches all basements: Beams Girders Ducts Other obstructions
2015 IRC Transition from the 2009 IRC 34
2015
R308.4 Hazardous Locations for GlazingR308.4 Hazardous Locations for Glazing
Reorganization Each item in a separate
subsection with title
2015 IRC Transition from the 2009 IRC 35
2012
2006 201211 items 7 subsections10 exceptions
R308.4.2 Glazing Adjacent to DoorsR308.4.2 Glazing Adjacent to Doors Glazing installed
perpendicular to a door < 24 inches from door Safety glazing if on hinge
side of an in-swinging door
2015 IRC Transition from the 2009 IRC 36
2015
2015 IRC Transition from the 2009 IRC
Copyright 2015 International Code Council 10
Glazing and Wet SurfacesGlazing and Wet Surfaces2012 IRC 2015 IRCR308.4.5 R308.4.5• Combines provisions
• tubs • swimming pools
• “in walls … facing … bathtubs, showers …”.
• Not safety glazing when ≥ 60 in. from edge of
• Shower• Sauna• Steam room
2015 IRC Transition from the 2009 IRC 37
R308.4.6 Glazing Adjacent Stairs and RampsR308.4.6 Glazing Adjacent Stairs and Ramps
Stairs and ramps Intermediate landing 36 in. height
2015 IRC Transition from the 2009 IRC 38
2012
R308.4.7 Glazing Adjacent to the Bottom Stair LandingR308.4.7 Glazing Adjacent to the Bottom Stair Landing2012 IRC 2015 IRCR308.4.7 R308.4.7 36 in height. Area in front of the plane of the
bottom tread.
2015 IRC Transition from the 2009 IRC 39
R309.5 Garage Fire SprinklersR309.5 Garage Fire Sprinklers
Not required unless: Nonrated exterior wall of
garage constructed on lot line when: Sprinklers in garage Sprinklers for all homes in
subdivision 6-foot setback on adjacent lot
2015 IRC Transition from the 2009 IRC 40
2012
2015 IRC Transition from the 2009 IRC
Copyright 2015 International Code Council 11
R310 Emergency Escape and Rescue OpeningsR310 Emergency Escape and Rescue Openings Reorganized Separate provisions
for windows and doors Less precise sill height
measurement Grade floor or below
grade openings 5.0
2015 IRC Transition from the 2009 IRC 41
2015 R310.2.2 EEROWindow Well DrainageR310.2.2 EEROWindow Well Drainage Window wells serving
emergency escape and rescue openings
Direct surface water to the foundation drainage system
Except for locations with well-drained soils
2015 IRC Transition from the 2009 IRC 42
2012
R310.5, R310.6 Emergency Escape and Rescue Openings for Additions, Alterations and Repairs
R310.5, R310.6 Emergency Escape and Rescue Openings for Additions, Alterations and Repairs No additional
emergency escape and rescue openings: Basement addition with
access to an emergency escape and rescue opening
Alterations or repairs to an existing basement unless new bedroom
Minimum Required FootingMinimum Required Footing Two-story house with slab on grade
foundation: Light-frame construction Soil-bearing strength @ 1500 psf Roof Live Load @ 20 psf 32ft. wide building with interior load-bearing wall
612015 IRC Transition from the 2009 IRC
R403.1.3 Footing and Stem Wall Reinforcing in Seismic Design Categories D₀, D₁, and D₂R403.1.3 Footing and Stem Wall Reinforcing in Seismic Design Categories D₀, D₁, and D₂
Defines required reinforcing
Updated figures
2015 IRC Transition from the 2009 IRC 62
2015
R403.1.6Foundation AnchorageR403.1.6Foundation Anchorage Anchor bolts in the middle
third of sill plate Measured to edge of bolt (Optimum 1¾ in.)
• Prescriptive provisions for deck ledger attachment revised to correlate with the National Design Specifications (NDS) for Wood Construction.
• Deck Ledger Connection to Band Joist• Clarified• Reorganized• Removes conflicting
and redundant language
2015 IRC Transition from the 2009 IRC 69
R507.2.4 Alternative Deck Lateral Load ConnectionR507.2.4 Alternative Deck Lateral Load ConnectionOptional Connections Figure 507.2.3(1): Two hold-down devices ≤ 2 ft of the ends of the deck
Figure 507.2.3(1): Four hold-downs
installed below the deck structure
2015 IRC Transition from the 2009 IRC 70
2015
R507.4DeckingR507.4Decking Max. deck joist
spacing for common decking materials
2015 IRC Transition from the 2009 IRC 71
2015 R507.5, R507.6, R507.7Deck Joists and BeamsR507.5, R507.6, R507.7Deck Joists and Beams Prescriptive methods for joists and beams in deck
construction. Spans & bearing requirements
2015 IRC Transition from the 2009 IRC 72
2015
2015 IRC Transition from the 2009 IRC
Copyright 2015 International Code Council 19
R507.8 Deck PostsR507.8 Deck Posts Minimum sizes of wood
posts supporting wood decks
Lateral restraint at bottom
2015 IRC Transition from the 2009 IRC 73
2015 Fastener Schedule for Structural MembersFastener Schedule for Structural Members2012 IRC 2015 IRC Table R602.3(1) Table R602.3(1)Table R602.3 (1) now includes requirements for nailing roof trusses to plates, abutting studs at intersecting wall corners, and connection of rim board to sill plates.
The Fastening Schedule now contains multiple nail size options. Roof rafter connections at ridge, valley, and hip are revised. Double top plate splicing is clarified. Clarification of the joist-to-band-joist (rim board) connection is added.
2015 IRC Transition from the 2009 IRC 74
R602.3.1 Stud Size, Height, and SpacingR602.3.1 Stud Size, Height, and Spacing Table R602.3.1 is deleted Exception for walls > 10 feet tall is added to the
Reorganization Inset distance BWP spacing Continuous sheathing end
conditions
Updated to Ultimate design wind speed
CS-PF & PFH modified Cripple walls
2015 IRC Transition from the 2009 IRC 80
2015 IRC Transition from the 2009 IRC
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R602.10.2 Braced Wall PanelsR602.10.2 Braced Wall Panels Measurements to edge of BWP BWP ≤10 feet from both ends of BWL BWP at end in SDC D0, D1, D2 Exceptions for other end conditions
≤ 20 feet between BWPs 2 BWPs for BWL >16 feet
2015 IRC Transition from the 2009 IRC 81
2012
82
Page 102
2015 IRC Transition from the 2009 IRC
2015
3500 lb. strap
Table R602.10.5 Min. Length BWPsTable R602.10.5 Min. Length BWPs
R703.9 Exterior Insulation and Finish SystemsR703.9 Exterior Insulation and Finish Systems Limitations for EIFS EIFS without drainage: Concrete and masonry
EIFS with drainage: All other wall assemblies
2015 IRC Transition from the 2009 IRC 93
2015 R703.11.1Vinyl Siding AttachmentR703.11.1Vinyl Siding Attachment Min. 1¼ inches into
“nailable substrate” or Through sheathing per test
report and manufacturer Nail 0.120 shank x 0.313
head 16 in. o.c.
942015 IRC Transition from the 2009 IRC
R703.12 Adhered Masonry Veneer
R703.12 Adhered Masonry Veneer
Minimum clearance and flashing requirements for exterior walls
2015 IRC Transition from the 2009 IRC 95
2012 R703.13, R703.14 Insulated Vinyl Siding and Polypropylene SidingR703.13, R703.14 Insulated Vinyl Siding and Polypropylene Siding
Insulated vinyl siding ≥ R-2 Continuous insulation Improved moisture control
Polypropylene siding requires separation: 5 ft. lot lines 10 ft. building on other lot
Fastening requirements
2015 IRC Transition from the 2009 IRC 96
2015
2015 IRC Transition from the 2009 IRC
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R703.15, R703.16, R703.17 Cladding Attachment over Foam SheathingR703.15, R703.16, R703.17 Cladding Attachment over Foam Sheathing
To wood framing (R703.15),
To cold-formed steel framing (R703.16), and
To masonry or concrete walls (R703.17).
2015 IRC Transition from the 2009 IRC 97
2015 Tables R802.4, R802.5 Ceiling Joist and Rafter Span TablesTables R802.4, R802.5 Ceiling Joist and Rafter Span Tables Span lengths Decreased for
Southern Pine Increased for DFL
and HF
2015 IRC Transition from the 2009 IRC 98
2015
R802.7 Cutting, Drilling, and Notching of Roof MembersR802.7 Cutting, Drilling, and Notching of Roof Members References Section R502.8.1 Notching of cantilevered rafters
(R802.7.1.1) New section Actual minimum
dimension of 3½ inches New figure
R802.7.1.1 Ceiling joist taper cut requirements New figure
R802.7.1.2
2015 IRC Transition from the 2009 IRC 99
2012 802.11 Roof Uplift Resistance802.11 Roof Uplift Resistance New Table R802.11 Accurate prescriptive values Rafters and trusses Both low- and high-slope roofs Wind Exposure Categories B and C
2015 IRC Transition from the 2009 IRC 100
2012
2015 IRC Transition from the 2009 IRC
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Table R802.11 Rafter or truss uplift connectionTable R802.11 Rafter or truss uplift connection
101
Rafter or Truss
Spacing
Roof Span (feet)
Exposure BUltimate Wind Speed Vult
(mph)115
Roof Pitch< 5:12 ≥ 5:12
24 in. o.c.28 198 17632 218 19436 240 212
2015 IRC Transition from the 2009 IRC
R806Roof VentilationR806Roof Ventilation Revised by placing two exceptions after the
general rule of 1/150 Exception for 1/300 vapor retarder on ceiling (only in cold-weather
climates) 40 – 50% of ventilation in upper portion ≤3 feet
below the ridge (previously 50-80)
Option to omit attic ventilation when approved (2015) Upper vents ≥3 feet above the eave vents (2012)
2015 N1102.2.4 Access Hatches and DoorsN1102.2.4 Access Hatches and Doors Vertical doors that
access unconditioned attics and crawl spaces: Do not require an R-
value to match the required wall insulation.
Must comply with the fenestration U-factor requirements of Table N1102.1.2.
2015 IRC Transition from the 2009 IRC 122
2015
N1102.2.7, Table N1102.1.2 R-Value Reduction for Walls with Partial Structural Sheathing
N1102.2.7, Table N1102.1.2 R-Value Reduction for Walls with Partial Structural Sheathing Moved from
footnote h of Table N1102.1.2 and placed in a new section
≤ 40% gross wall area
1232015 IRC Transition from the 2009 IRC
2015 N1102.2.8, Table N1102.4.1.1 Floor Framing Cavity InsulationN1102.2.8, Table N1102.4.1.1 Floor Framing Cavity Insulation Permits air space
above floor framing cavity insulation
Table N1102.4.1.1 reformatted into three columns to separate air barrier from insulation requirements.
2015 IRC Transition from the 2009 IRC 124
2015
2015 IRC Transition from the 2009 IRC
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Table N1102.4.1.1 Insulation at Wall Corners and HeadersTable N1102.4.1.1 Insulation at Wall Corners and Headers Cavity insulation min. R-3 per inch of insulation
1252015 IRC Transition from the 2009 IRC
2015 N1102.4.1.2 Building Thermal Envelope TestingN1102.4.1.2 Building Thermal Envelope Testing Blower door test required Air-leakage rate: Zones 1-2: ≤ 5 ACH Zones 3-8: ≤ 3 ACH
2012 N1103.5 Heated Water Circulation and Temperature Maintenance SystemsN1103.5 Heated Water Circulation and Temperature Maintenance Systems
Automatic controls Continuously operating circulation pumps are
no longer permitted. Heat trace systems must comply with one of
the referenced standards.
2015 IRC Transition from the 2009 IRC 130
2015
N1103.5.3 (N1103.4.2) Hot Water Pipe InsulationN1103.5.3 (N1103.4.2) Hot Water Pipe Insulation Minimum R-3 insulation for hot water piping ≥ 3/4 in diameter Serving more than one dwelling unit Outside conditioned space Water heater to distribution manifold Under a floor slab or buried Supply and return piping in recirculation systems
Mechanical (Chapter 12 through 32) Mechanical (Chapter 12 through 32)
Part 5
1332015 IRC Transition from the 2009 IRC
M1301 Identification and Certification of Pipe, Tubing, and FittingsM1301 Identification and Certification of Pipe, Tubing, and Fittings All pipe, tubing, and fittings require manufacturer’s mark third-party testing or certification
New definitions supplement the provisions.
2015 IRC Transition from the 2009 IRC 134
2012
M1411.6 Locking Access Port CapsM1411.6 Locking Access Port Caps The code now
recognizes any approved means to prevent unauthorized access to outdoor refrigerant ports.
2015 IRC Transition from the 2009 IRC 135
2012 M1502.4 Dryer Exhaust DuctM1502.4 Dryer Exhaust Duct Support spacing increased from 4 to12 feet Mechanical fastening requiredScrew fasteners penetrate ≤ 1/8 inch
Specified length increased from 25 to 35 feet
2015 IRC Transition from the 2009 IRC 136
2012
2015 IRC Transition from the 2009 IRC
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M1502.4.4, M1502.4.5 Dryer Exhaust Duct Power Ventilators M1502.4.4, M1502.4.5 Dryer Exhaust Duct Power Ventilators Dryer exhaust duct power
ventilators (DEDPVs) to increase the allowable exhaust duct length for clothes dryers.
Label not required where equivalent duct length ≤35 feet
Not based on whether the duct is concealed or not
2015 IRC Transition from the 2009 IRC 138
2015
M1503.4Makeup Air for Range HoodsM1503.4Makeup Air for Range Hoods Makeup air for kitchen
exhaust systems >400 cfm: Automatic damper, or Gravity damper Transfer openings are
permitted to obtain makeup air from rooms other than the kitchen
139
2015
2015 IRC Transition from the 2009 IRC
M1506Exhaust OpeningsM1506Exhaust Openings Termination ≥ 3 feet from property
line ≥ 3 feet from openings ≥ 10 feet from or 3 feet
above mechanical air intakes
2015 IRC Transition from the 2009 IRC 140
2012
2015 IRC Transition from the 2009 IRC
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M1506.2 Exhaust Duct LengthM1506.2 Exhaust Duct Length Maximum exhaust duct lengths based on: Duct diameter Type of duct Exhaust fan airflow rating
2015 IRC Transition from the 2009 IRC 141
2015 M1507Mechanical VentilationM1507Mechanical Ventilation Whole-house mechanical ventilation Prescriptive air flow rate based on Area of dwelling Number of bedrooms Continuous or intermittent operation
Local exhaust Mechanical ventilation of kitchens and bathrooms
2015 IRC Transition from the 2009 IRC 142
2012
M1507.3 Whole-house mechanical ventilation systemM1507.3 Whole-house mechanical ventilation system System design: One or more supply or
exhaust fans, or a combination
Supply ventilation can be outdoor air ducts connected to the return side of air handler
System controls To enable manual override
1432015 IRC Transition from the 2009 IRC
M1601.1 Above-Ground Duct Systems
M1601.1 Above-Ground Duct Systems Stud cavities of
exterior walls are no longer permitted to be used for return air plenums.
2015 IRC Transition from the 2009 IRC 144
2012
2015 IRC Transition from the 2009 IRC
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M1601.4 Duct InstallationM1601.4 Duct Installation Tapes and mastics used to seal sheet metal
ducts must be listed to UL 181 B as has been required for sealing flexible ducts.
Snap-lock and button-lock seams are no longer exempt from the sealing requirements.
2015 IRC Transition from the 2009 IRC 145
2015 M1601.4.1 Duct Joints, Seams and ConnectionsM1601.4.1 Duct Joints, Seams and Connections IMC & SMACNA HVAC Duct Construction
Standards Joints, seams and connections: Securely fastened Sealed Unlisted duct tape not
permitted for sealing
2015 IRC Transition from the 2009 IRC 146
2012
M1602Return AirM1602Return Air Return air provisions
reorganized & clarified Provisions for outdoor air
openings removed in favor of references to the applicable provisions for outdoor air in Chapter 3
Preserves intent to keep contaminants out of return air circulated throughout the dwelling
2015 IRC Transition from the 2009 IRC 147
2015 M1602.2 Prohibited Sourcesof Outdoor and Return AirM1602.2 Prohibited Sourcesof Outdoor and Return Air Permits return air from garage for system that
serves garage only 10-foot rule applies to atmospheric burner
appliances only
2015 IRC Transition from the 2009 IRC 148
2012
2015 IRC Transition from the 2009 IRC
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M1901Ranges and OvensM1901Ranges and Ovens
Cooking appliances listed and labeled for household use
Commercial appliances prohibited
Vertical clearances clarified
2015 IRC Transition from the 2009 IRC 149
2012
Fuel Gas (Chapter 24)Fuel Gas (Chapter 24)
Part 6
1502015 IRC Transition from the 2009 IRC
G2404.11 Condensate PumpsG2404.11 Condensate Pumps Condensate pumps located in uninhabitable
spaces must be connected to the appliance to shut down the equipment in the event of pump failure.
2015 IRC Transition from the 2009 IRC 151
2015 G2409.1 Reduced Clearance to Combustible MaterialsG2409.1 Reduced Clearance to Combustible Materials Gypsum board is now specifically identified as a
combustible material for purposes of determining required clearances around gas-fired appliances.
2015 IRC Transition from the 2009 IRC 152
2012
2015 IRC Transition from the 2009 IRC
Copyright 2015 International Code Council 39
G2411.1.1 Electrical Bonding of Corrugated Stainless Steel TubingG2411.1.1 Electrical Bonding of Corrugated Stainless Steel Tubing
75-foot maximum allowable length of bonding jumper
Bonding methods must comply with NFPA 70
Devices, such as clamps, must be listed in accordance with UL 467
1532015 IRC Transition from the 2009 IRC
G2412, G2415 Pipe Identification and CertificationG2412, G2415 Pipe Identification and Certification All pipe, tubing, and fittings used in a fuel-gas
system now require Manufacture’s mark and Third-party testing or certification
New definitions supplement the provisions.
2015 IRC Transition from the 2009 IRC 154
2012
G2413.2 Maximum Gas DemandG2413.2 Maximum Gas Demand Table G2413.2 Approximate Input and the
reference to it were deleted The code requires the actual maximum input
rating of the appliances to be known and used for gas pipe sizing purposes.
2015 IRC Transition from the 2009 IRC 155
2015 G2414.6Plastic Pipe, Tubing and FittingG2414.6Plastic Pipe, Tubing and Fitting PVC and CPVC pipe are expressly prohibited
materials for supplying fuel gas.
2015 IRC Transition from the 2009 IRC 156
2015
2015 IRC Transition from the 2009 IRC
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G2415.5Fittings in Concealed LocationsG2415.5Fittings in Concealed LocationsChange Type: Clarification Approved fittings:
1. Threaded elbows, tees and couplings
2. Brazed fittings3. Welded fittings4. Fittings listed to ANSI
LC-1/CSA 6.26 or ANSI LC-4.
2015 IRC Significant Changes 157
2015 G2415.7 Protection of Concealed Piping Against Physical DamageG2415.7 Protection of Concealed Piping Against Physical Damage Completely rewritten to address concealed
piping: Parallel to framing members Within framing members
Protection must extend well beyond edge of members that are bored or notched
2015 IRC Transition from the 2009 IRC 158
2015
G2419.4 Sediment TrapG2419.4 Sediment Trap A new figure for correct
configuration Not required for: Gas-fired decorative
vented appliances installed in vented fireplaces Gas fireplaces
to increase the allowable exhaust duct length for clothes dryers
Permanent label: Required where equivalent duct length >35 feet Not required ≤35 feet whether the duct is concealed or not
Instead of prohibiting all duct fasteners such as screws and rivets, the code now limits the penetration of fasteners, where installed.
2015 IRC Transition from the 2009 IRC 165
2015 G2442.4 Prohibited Sources of Outdoor and Return AirG2442.4 Prohibited Sources of Outdoor and Return Air Permits return air from garage for system that
serves garage only 10-foot rule applies to atmospheric burner
appliances only
2015 IRC Transition from the 2009 IRC 166
2012
G2447.2 Prohibited Location of Commercial Cooking AppliancesG2447.2 Prohibited Location of Commercial Cooking Appliances
The code does not prohibit the installation of cooking appliances that are listed as both commercial and domestic appliances.
2015 IRC Transition from the 2009 IRC 167
2015
Plumbing (Chapter 25 through 33)Plumbing (Chapter 25 through 33)
Part 7
1682015 IRC Transition from the 2009 IRC
2015 IRC Transition from the 2009 IRC
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P2502.1, P2503.4 Inspection and Tests for Building SewerP2502.1, P2503.4 Inspection and Tests for Building Sewer When the entire sanitary drainage system is
replaced: Internal examination of underground and under slab
piping is required to verify: Size Slope Condition
A new provision prescribes a pressure test for a forced sewer at a test pressure of 5 psi greater than the pump rating.
2015 IRC Transition from the 2009 IRC 169
2015 P2503.5 Drain, Waste, and Vent Systems TestingP2503.5 Drain, Waste, and Vent Systems Testing The head pressure for a water test on drain,
waste, and vent (DWV) systems has been reduced from 10ft to 5ft.
2015 IRC Transition from the 2009 IRC 170
2015
P2503.5.1 Rough Plumbing TestP2503.5.1 Rough Plumbing Test
The IRC no longer permits air testing of plastic piping in DWV systems.
2015 IRC Transition from the 2009 IRC 171
2012 P2603.2.1 Protection Against Physical DamageP2603.2.1 Protection Against Physical Damage Edge distance
reduced from <1½ in. to <1¼ in.
Accommodates ½-in. dia. copper pipe in 2x4 framing
2015 IRC Transition from the 2009 IRC 172
2015
2015 IRC Transition from the 2009 IRC
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P2603.3 Protection Against CorrosionP2603.3 Protection Against Corrosion The minimum thickness of sheathing material for
protection of piping against corrosion has been reduced from 0.025 inches to 0.008 inches (8 mil).
The corrosion protection requirement applies to metallic piping other than cast iron, ductile iron, and galvanized steel that is in direct contact with concrete, masonry or steel framing.
Previously, protection was only required for materials passing through walls and floors of these materials.
All metallic piping requires corrosion protection when located in corrosive soils.
2015 IRC Transition from the 2009 IRC 173
2015 P2603.4 Pipes through Foundation WallsP2603.4 Pipes through Foundation Walls A sleeve or relieving arch is not required for
pipes passing under a footing.
2015 IRC Transition from the 2009 IRC 174
2012
Table P2605.1 Piping SupportTable P2605.1 Piping Support Support spacing requirements for PEX and PE-RT
tubing 1¼ inches and greater in diameter have been added to the table.
Footnote b of Table P2605.1 clarifies the mid-story guide requirements for some types of vertical pipe 2 inches and smaller in diameter.
2015 IRC Transition from the 2009 IRC 175
2015 P2606 Sealing of Annular SpacesP2606 Sealing of Annular Spaces Sealing pipe
penetrations of the building envelope: Caulking material Foam sealant Gasketing system Serves to seal against air
leakage per IECC
2015 IRC Transition from the 2009 IRC 176
2012
2015 IRC Transition from the 2009 IRC
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P2609.1, 2609.4 Identification and CertificationP2609.1, 2609.4 Identification and Certification Pipe, fittings, and plumbing components identification of the manufacturer marking requirements of the applicable referenced
standard listed by a third-party certification agency Table P2608.4 and third-party testing requirements
prohibited locations for waste receptors and standpipes
Clothes-washer standpipes permitted in bathrooms
A definition of waste receptor has been added to the code. Waste receptors are now permitted in bathrooms and closets.
WASTE RECEPTOR. A floor sink, standpipe, hub drain or a floor drain that receives the discharge of one or more indirect waste pipes.
2015 IRC Transition from the 2009 IRC 178
P2709.1, P2709.2 Shower Receptors and LiningP2709.1, P2709.2 Shower Receptors and Lining
Shower liner extension above finished threshold reduced from 3 to 2 inches
No minimum thickness for PVC and CPE liners
2015 IRC Transition from the 2009 IRC 179
2012 P2717 Dishwashing MachinesP2717 Dishwashing Machines The code now references the applicable standards for
integral air gaps protecting the potable water supply to dishwashers.
The term “food waste disposer” replaces “food waste grinder.”
Sections P2717.2 and P2717.3 regarding dishwasher discharge to the sink tailpiece or the food waste disposer have been combined into a single Section P2717.2, eliminating redundant language.
2015 IRC Transition from the 2009 IRC 180
2015
2015 IRC Transition from the 2009 IRC
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Water Heater Drain Valves and PansWater Heater Drain Valves and Pans2012 IRC 2015 IRCP2801.5 P2801
Safety pan provisions: Apply to storage-
tank type water heaters and hot water storage tanks
Do not apply to tankless water heaters
Requires drain valves with a threaded outlet
Aluminum and plastic pans of the prescribed thickness acceptable.
Pan drain is not required when a water heater is replaced and there is no existing drain.
2015 IRC Transition from the 2009 IRC 181
P2804.6.1 Water Heater Relief Valve Discharge PipingP2804.6.1 Water Heater Relief Valve Discharge Piping The T&P relief valve
discharge pipe termination requires an air gap
PEX and PE-RT tubing used for relief valve discharge piping: Must be one size larger than
the T&P valve discharge outlet
Outlet end of the tubing must be fastened in place
2015 IRC Transition from the 2009 IRC 182
2015
P2901, P2910 through P2913 Nonpotable Water SystemsP2901, P2910 through P2913 Nonpotable Water Systems Nonpotable water outlets
identified The color purple identifies
distribution piping conveying nonpotable water.
New Sections P2910 through P2913 are extracted from the IgCC: Collection Storage Distribution
1832015 IRC Transition from the 2009 IRC
P2904.2.4.2 Minimum Fire Sprinkler Separation from ObstructionsP2904.2.4.2 Minimum Fire Sprinkler Separation from Obstructions
A new figure provides prescriptive values for minimum separation distances between fire sprinklers and obstructions.
Lesser distances are permitted in accordance with the manufacturer’s installation instructions.
2015 IRC Transition from the 2009 IRC 184
2012
2015 IRC Transition from the 2009 IRC
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P2905 Heated Water Distribution SystemsP2905 Heated Water Distribution Systems Pointers have been added to the IRC plumbing
provisions to direct the user to the applicable energy conservation provisions of IRC Chapter 11 related to heated water distribution systems.
Section N1103.5 requires automatic controls to maintain hot water temperature for heated water circulation systems and for heat trace temperature maintenance systems when such systems are installed.
2015 IRC Transition from the 2009 IRC 185
2015 P2906.2 Lead Content of Drinking Water Pipe and FittingsP2906.2 Lead Content of Drinking Water Pipe and Fittings Water for drinking or
cooking Piping, fittings, joints: ≤0.25% lead content Federal law NSF 372
Other water supply piping: ≤8% lead content NSF 61
2015 IRC Significant Changes 186
P3003.9 Solvent Cementing of PVC JointsP3003.9 Solvent Cementing of PVC Joints Primer is not required for: DWV PVC pipe and fittings ≤4-inch pipe size Non-pressure application
2015 IRC Transition from the 2009 IRC 187
2015 P3003.19 Joints between Drainage Piping and Water ClosetsP3003.19 Joints between Drainage Piping and Water Closets Use of waste connector and sealing gasket is
now permitted as an alternative to a flanged connection for floor-mounted water closets.
permitted for metallic piping Cleanout must be within 1½
inches of the finished wall surface
Cleanout is no longer required at the base of each waste or soil stack
2015 IRC Transition from the 2009 IRC 189
2015 P3007.3.5 Ejector Connectionto the Drainage SystemP3007.3.5 Ejector Connectionto the Drainage System
Discharge from ejector pumps permitted to connect to:
soil stacks waste stacks horizontal branch drains building sewers building drains
2015 IRC Transition from the 2009 IRC 190
2012
P3008.1 Backwater ValvesP3008.1 Backwater Valves For existing buildings, fixtures that are located
above the next upstream manhole cover are allowed to discharge through a backwater valve.
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2015 P3103.1, P3103.2 Vent TerminalsP3103.1, P3103.2 Vent Terminals Where a minimum 3-inch diameter vent terminal is
required to prevent frost blockage in cold climates, the 3-inch diameter pipe must extend at least 12 inches inside the building’s thermal envelope.
The minimum 7-foot height requirement for vent terminations applies only to roofs used for purposes similar to residential decks, patios and balconies.
2015 P3103.5 Location of Vent TerminalP3103.5 Location of Vent Terminal The minimum
clearance to vent terminations above openings within 10 feet has been increased from 2 feet to 3 feet.
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Location of vent terminal
P3201.2 Trap Seal Protection Against EvaporationP3201.2 Trap Seal Protection Against Evaporation Trap seal protection against evaporation can
now be accomplished in a variety of ways, including trap seal primer valves supplied with nonpotable water and barrier-type trap seal protection devices
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Electrical (Chapter 34 through 43)Electrical (Chapter 34 through 43)
Part 8
1962015 IRC Transition from the 2009 IRC
2015 IRC Transition from the 2009 IRC
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E3608.1.2 Concrete-Encased ElectrodesE3608.1.2 Concrete-Encased Electrodes Separate parts to clarify
meaning. ≥ 20-foot length
≥ ½-inch electrically conductive reinforcing bars or
≥ 4 AWG bare copper conductor
≥ 2-inch encasement Concrete in direct contact
with earth
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2012 E3608.4 Supplemental Electrode RequiredE3608.4 Supplemental Electrode Required A rod, pipe, or
plate electrode requires a supplemental electrode unless testing confirms that the single electrode has a resistance to earth of 25 ohms or less.
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E3901.7 Outdoor OutletsE3901.7 Outdoor Outlets An outdoor outlet is
required for any size of deck, porch, or balcony that is accessible from inside the swelling unit.
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2012 E3901.9 Receptacle Outlets for GaragesE3901.9 Receptacle Outlets for Garages Garage receptacle
outlets must be served by a separate branch circuit that does not supply other outlets.
At least one receptacle outlet is required for each car space in a garage.
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E3901.11 Receptacle Outlets in FoyersE3901.11 Receptacle Outlets in Foyers Foyers > 60 square feet in area Receptacle in each wall space ≥ 3 feet
Laundry areas have been added to the list of locations requiring ground-fault circuit interrupter (GFCI) protection. Receptacles within 6 feet of bathtubs and showers, and receptacles for dishwashers also require CFGI protection.
receptacles are not required for receptacles: ≥ 5½ feet above
the floor part of a luminaire
or appliance in a dedicated
space for an appliance
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2012 E4203.4.3 Location of Low-Voltage Luminaires Adjacent to Swimming PoolsE4203.4.3 Location of Low-Voltage Luminaires Adjacent to Swimming Pools Listed low-voltage luminaires meeting the
prescribed conditions are permitted to be located less than 5 feet from the water’s edge of swimming pools, spas, and hot tubs
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2015 IRC Transition from the 2009 IRC
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E4204.2 Bonded Parts of Pools, Spas, and Hut TubsE4204.2 Bonded Parts of Pools, Spas, and Hut Tubs2012 IRC 2015 IRCE4204.2 E4204.2
Metal parts ≤ 5 feet from pool, including Awnings Fences Metal door and window
frames Walls ≥ 5 feet high and < 3
feet from pool: Equipotential bonding
required on pool side of wall only
Perimeter equipotential bonding is not required: Listed as a self-contained spa
for aboveground use Not identified as suitable only
for indoor use Installation per manufacturer
and located on or above grade Top rim of the spa or hot tub is ≥28 in. above all perimeter surfaces within 30 in.
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E4209.3 Accessibility to Electrical Equipment of Hydromassage BathtubsE4209.3 Accessibility to Electrical Equipment of Hydromassage Bathtubs When located behind
access panels and serving hydromassage bathtubs, receptacle outlets must have their face in direct view and within 1 foot of the access opening.
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Appendices Appendices
Part 9
2112015 IRC Transition from the 2009 IRC
Appendix RLight Straw-Clay Construction Appendix RLight Straw-Clay Construction Prescriptive provisions Light straw-clay walls are
non-bearing infill around a structural frame.
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Appendix S Strawbale ConstructionAppendix S Strawbale Construction Prescriptive provisions for strawbale construction Strawbale walls may be bearing walls or nonbearing
infill around a structural frame depending upon the method of construction and detailing.
Appendix S contains requirements for both construction methods.
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What will you do differently with the changes in the code?
How will the changes affect the inspection and plan review process?
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Final ReflectionFinal Reflection
This slide will help the learner to reflect on the day and what they will take back to the job and apply. What? What happened and what was observed
in the training? So what? What did you learn? What difference
did this training make? Now what? How will you do things differently
back on the job as a result of this training?
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International Code Council is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request.
This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
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2015 IRC Transition from the 2009 IRC
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