Table of Contents
CHAPTER 4: FOUNDATION CONSTRUCTION
Exterior Surface Drainage and Gutters (R401.3 and R801.3)
Concrete Strength (R402.2)
Footings (R403)
Foundation Walls (R404)
Foundation Drains and Dampproofing (R405 and R406)
Crawl Spaces (R408)

CHAPTER 5: FLOOR CONSTRUCTION
Application of the Material in this Chapter
Decks (R502.2.1)
Wood Floor Joist Spans (R502.3)
Wood Header and Girder Spans (R502.5)
Wood Floor Framing (R502)
Wood Floor Joist and Truss Boring and Notching (R502.8)
Floor Joist Openings (R502.10)
Draftstopping (R502.12)
Wood Structural Panel Sheathing (R503.2)
Concrete Slab-On-Grade Floors (R506)

CHAPTER 6: WALL CONSTRUCTION
Wood Nailing Schedule (R602.3)
Wall Height and Stud Spacing (R602.3.1)
Sill, Sole, and Top Plates (R602.3.2 and R602.3.4)
Wood Stud and Plate Boring and Notching (R602.6)
Fireblocking (R602.8)
Cripple Walls (R602.9)
Wall Bracing (R602.10)
Masonry Walls Above Grade (R606, R607, R608)

CHAPTER 7: INTERIOR AND EXTERIOR WALL COVERINGS
Drywall (Gypsum Board) Interior Application (R702.3 and R702.4)
Exterior Wall Coverings (R703)
Stucco Application (R703.6)
Masonry (Brick) and Stone Veneer (R703.7)
Flashing (R703.8)

CHAPTER 8: ROOF AND CEILING CONSTRUCTION
Gutters (R801.3)
Ceiling Joist and Rafter Framing Details (R802.3)
Ceiling Joist and Rafter Spans (R802.4 and R802.5)
Ceiling Joist and Rafter Boring and Notching (R802.7)
Ceiling Joist and Rafter Openings (R802.9)
Wood Truss Installation and Bracing (R802.10)
Attic Ventilation (R806)
Attic Access (R807)
Insulation Clearance to Heat-Producing Devices (R808)

CHAPTER 9: ROOF COVERINGS AND FLASHING
Roof Flashing and Drainage (R903)
Asphalt (Fiberglass) Shingle Roof Covering Materials and Installation (R905.2)
Concrete and Clay Tile Roof Covering Materials and Installation (R905.3)
Mineral-Surfaced Roll Roof Covering Materials and Installation (R905.5)
Slate And Slate Type Shingle Roof Covering Materials and Installation (R905.6)
Wood Shingle Roof Covering Materials and Installation (R905.7)
Wood Shake Roof Covering Materials and Installation (R905.8)
Low Slope (Flat) Roof Covering Materials and Installation (R905.9 and 11-15)
Metal Panel Roof Covering Materials and Installation (R905.10)
Repair and Replacement of Roof Coverings (R907)

CHAPTER 10: FIREPLACES AND CHIMNEYS
Masonry Chimneys (R1001)
Masonry Fireplaces (R1003)
Fireplace Combustion Air (R1005)
Factory-Built Fireplaces and Chimneys (R1002 and R1004)

CHAPTER 11: ENERGY EFFICIENCY
Buildings Governed by IRC Energy Efficiency Requirements
Energy Efficiency Definitions
Component Thermal Performance Minimum Value Requirements (N1102)

CHAPTER 12: MECHANICAL SYSTEMS CHANGES AND MAINTENANCE
Mechanical Systems Changes and Maintenance (M1201 and M1202)

CHAPTER 13: MECHANICAL SYSTEMS GENERAL REQUIREMENTS
Access to Mechanical Appliances (M1305)
Oil and Solid-Fuel Appliance Clearance Reduction to Combustible Materials (M1306)
Appliance Installation, Anchorage, Elevation, and Protection

CHAPTER 14: HEATING AND COOLING EQUIPMENT
HVAC Equipment General Installation Requirements (M1401)
Electric Radiant Heating Systems Installation Requirements (M1406)
Electric Heating Elements Installed in HVAC Ducts, Heat Pumps, and Air Conditioners (M1407)
Vented Floor Furnaces (M1408 and G2437)
Vented Wall Furnaces (M1409 and G2436)
Vented Room Heaters (M1410)
Air Conditioning Condensate Disposal (M1411)
Evaporative Cooling Equipment Installation Requirements (M1413)

CHAPTER 15: KITCHEN AND CLOTHES DRYER EXHAUST SYSTEMS
Clothes Dryer Exhaust Systems (M1501 and G2439)
Kitchen Range Hoods and Exhaust Systems (M1502)

CHAPTER 16: HVAC DUCT SYSTEMS
Flexible Duct Installation (M1601.3)
Framing Cavity Return Ducts (M1601.1.1)
Underground Ducts (M1601.1.2)
Outdoor and Return Air Location and Installation (M1403, M1602 and G2442)

CHAPTER 17: COMBUSTION AIR
Combustion Air for Liquid and Solid-Fuel Appliances General Requirements (M1701)
Combustion Air for Liquid and Solid-Fuel Appliances from Inside the Building (M1702)
Combustion Air for Liquid and Solid-Fuel Appliances from Outside the Building (M1703)

CHAPTER 18: CHIMNEYS AND VENTS FOR LIQUID AND SOLID-FUEL APPLIANCES
Appliances Governed by this Chapter
Chimneys and Vents for Liquid and Solid-Fuel Appliances General Requirements (M1801)
Adding or Removing Liquid and Solid-Fuel Appliances from Chimneys and Vents (M1801.3)
Draft Hoods, Draft Regulators, and Dampers for Liquid and Solid-Fuel Appliances (M1802)
Connection of Vent Connectors to Chimneys for Liquid and Solid-Fuel Appliances (M1803 and 1805)
Vents for Liquid and Solid-Fuel Appliances (M1804)

CHAPTER 19: SPECIAL FUEL-BURNING EQUIPMENT
Kitchen Cooking Equipment (M1901)
Sauna Heaters (M1902 and G2440)

CHAPTER 20: BOILERS AND WATER HEATERS
Hot Water and Steam Boilers (M2001 and G2452)
Water Heater Installation and Access (M2005)
Pool Heater Installation (M2006)

CHAPTER 21: HYDRONIC PIPING
Hydronic Piping Systems (M2101)

CHAPTER 22: OIL PIPING AND STORAGE SYSTEMS
Oil Piping and Storage Systems (M2201)

CHAPTER 23: SOLAR ENERGY SYSTEMS
Solar Energy Systems (M2301)

CHAPTER 24: FUEL GAS
Gas Appliances and Gas Piping Systems General Requirements (G2401, G2403-G2405)
Gas Appliances Prohibited Locations and Prohibited Combustion Air Sources (G2406)
Combustion Air for Gas Appliances General Requirements (G2407)
Combustion Air for Gas Appliances from Inside the Building (G2407.5)
Combustion Air for Gas Appliances from Outside the Building (G2407.6)
Combustion Air for Gas Appliances from Inside and Outside the Building (G2407.7)
Gas Appliance Clearance Reduction to Combustible Materials (G2409)
Gas Piping System Grounding and Bonding (G2410 and G2411)
Gas Piping General Installation, Modification, and Identification (G2412)
Gas Pipe Sizing (G2413)
Gas Pipe Materials (G2414)
Gas Pipe Installation and Protection (G2415)
Gas Pipe Inspection, Testing, and Purging (G2417)
Gas Pipe Support (G2418 and G2424)
Drips and Sediment Traps (G2419)
Gas Shutoff Valves (G2420)
Gas Pressure Regulators (G2421)
Gas Connections to Appliances (G2422)
Vents for Gas Appliances General Requirements (G2425, G2426, G2427)
Adding or Removing Gas Appliances from Chimneys and Vents (G2425.15)
Venting Gas Appliances Using a Masonry Chimney (G2427.5)
Gas Vent Roof Termination (G2427.6)
Single Wall Vents for Gas Appliances (G2427.7)
Vent Termination for Mechanical Draft and Direct Vent Appliances (G2427.8)
Vent Connectors for Category I Gas Appliances (G2427.10)
Gas Vent Draft Hoods and Dampers (G2427.12, G2427.13, G2427.14)
Gas Vent Size Tables Definitions (G2428.1)
Type B Gas Vent Size for One Appliance General Installation Requirements and Examples (G2428.2)
Type B Gas Vent Size Table for One Appliance Using Type B Vent Connector (G2428.2-1)
Type B Gas Vent Size Table for One ApplianceUsing Single Wall Vent Connector (G2428.2-2)
Type B Gas Vent Size for Multiple Appliances General Installation Requirements and Examples (G2428.3)
Type B Gas Vent Size Table for Multiple Appliances Using Type B Vent Connector (G2428.3-1)
Type B Gas Vent Size Table for Multiple Appliances Using Single Wall Vent Connector (G2428.3-2)
Masonry Chimney Size Table when Chimney Used as Vent for Gas Appliances Using Type B Vent Connector (G2428.3-3)
Masonry Chimney Size Table when Chimney Used as Vent for Gas Appliances Using Single Wall Vent Connector (G2428.3-4)
Unvented Gas Room Heaters (G2445)
Gas Cooking Appliances (G2447)
Gas Lighting (G2450)

CHAPTER 25: PLUMBING ADMINISTRATION
Plumbing Systems Changes, Inspection, Testing, and Maintenance (P2502 and P2503)

CHAPTER 26: GENERAL PLUMBING INSTALLATION REQUIREMENTS
Plumbing Pipe General Installation Requirements

CHAPTER 27: PLUMBING FIXTURES
Definitions of Terms Used in Plumbing Systems
Plumbing Fixtures General Installation Requirements
Showers (P2708 and P2709)

CHAPTER 28: WATER HEATERS
Water Heater Drip Pans and Relief Valves

CHAPTER 29: WATER SUPPLY SYSTEM INSTALLATION REQUIREMENTS
Backflow Protection of Water Supply (P2902)
Backflow Protection by Air Gaps (P2902.2.1)
Backflow Protection Using Backflow Prevention Devices (P2902.3 and P2902.4)
Water Supply General Requirements (P2903)
Water Supply Pipe Size (P2903.7)
Water Supply Valves (P2903.9)
Water Service and Distribution Pipe General Installation Requirements (P2904)
Reverse Osmosis Water Treatment Units (P2907.2)

CHAPTER 30: SANITARY DRAINAGE SYSTEM INSTALLATION REQUIREMENTS
Drainage and Sewer Pipe Materials, Fittings, and Joints
Drainage and Sewer Pipe Size (P3005.4)
Drainage and Sewer Pipe Fittings Definitions (P3005.1)
Drainage and Sewer Pipe Fittings Installation (P3005.1)
Drainage and Sewer Pipe Cleanouts (P3005.2)
Sewage Pumps and Ejectors (P3007)
Backwater Valves (P3008)

CHAPTER 31: PLUMBING VENTS
Plumbing Vents General Installation Requirements
Vent Exterior Terminations (P3103)
Fixture Drains (P3105)
Individual Vents (P3106)
Common Vents (P3107)
Wet Vents (P3108)
Waste Stack Vents (P3109)
Circuit Vents (P3110)
Combination Waste and Vent (P3111)
Island Fixture Vents (P3112)
Vent Pipe Size (P3113)
Air Admittance Valves (P3114)

CHAPTER 32: TRAPS
Fixture Traps (P3201)

CHAPTER 33: ELECTRICAL SYSTEM GENERAL REQUIREMENTS
Electrical System General Installation Requirements
Electrical Equipment Access and Clearances (E3305)
Wire Splices and General Wire Installation Requirements (E3306 and E3307)

CHAPTER 34: DEFINITIONS OF TERMS USED IN ELECTRICAL SYSTEMS

CHAPTER 35: ELECTRICAL SERVICES
Electrical Services General Requirements (E3501)
Electrical Service Load Calculation (E3502)
Electrical Service, Feeder, and Grounding Electrode Wire Size (E3503)
Service Drop Clearances and Installation (E3504)
Service Entrance Wire and Mast Installation (E3505)
Service Grounding General Requirements (E3507)
Grounding Electrodes (E3508)
Bonding (E3509)
Grounding Electrode Wires (E3510 and E3511)

CHAPTER 36: BRANCH CIRCUIT AND FEEDER REQUIREMENTS
Multiwire Branch Circuits (E3601.5)
Branch Circuit Voltage and Amperage Ratings (E3602)
Branch Circuits Required (E3603)
Feeder Load Calculation (E3604)
Wire Sizing and Overcurrent Protection (E3605)
Panelboard Protection and Rating (E3606)

CHAPTER 37: WIRING METHODS
Wiring Methods Definition
Knob-And-Tube Wiring
Wiring Methods and Allowed Uses (E3701)
Above Ground Wiring Installation (E3702)
Below Ground Wiring Installation (E3703)

CHAPTER 38: RECEPTACLE, LIGHT, AND WIRING INSTALLATION
Receptacle Installation (E3801)
Ground-Fault and Arc-Fault Protection Required Locations (E3802)
Light Fixture Required Locations (E3803)
Conduit, Tubing, and Cable Installation (E3804)
Junction Boxes and Device Boxes (E3805 and E3806)
Cabinets and Panelboards (E3807)
Equipment Grounding (E3808)
Flexible Cords (E3909)

CHAPTER 39: FINAL INSTALLATION OF SWITCHES, RECEPTACLES, AND LIGHTS
Switch Installation (E3901)
Receptacle Installation (E3902)
Light Fixture Installation (E3903 and E3904)
Clothes Closet Light Installation (E3903.11)
Track Lights (E3905)

CHAPTER 40: APPLIANCE INSTALLATION
Appliance Definition
Appliance Installation (E4001)

CHAPTER 41: ELECTRICAL REQUIREMENTS FOR POOLS, SPAS, WHIRLPOOL TUBS, FOUNTAINS
Application of the Material in this Chapter
Swimming Pool and Spa Definitions (E4101)
Swimming Pool and Spa Wiring Methods (E4102)
Receptacles and Switches Near Swimming Pools and Spas (E4103.1 - E4103.3)
Lights and Fans Near Swimming Pools and Spas (E4103.4)
Bonding of Metal Near Swimming Pools and Spas (E4104)
Grounding of Metal Near Swimming Pools and Spas (E4105)
Installation Requirements for Underwater Lights, Junction Boxes, and Other Equipment Near Pools and Spas (E4106)

CHAPTER 42: LOW VOLTAGE CIRCUITS

APPENDIX AE: MANUFACTURED HOMES

APPENDIX AF: RADON CONTROL

APPENDIX AG: SWIMMING POOL AND SPA BARRIERS AND ACCESS CONTROL

SATELLITE DISHES AND TELEVISION AND RADIO ANTENNAS (NEC ARTICLE 810)

CABLE TELEVISION SYSTEM WIRING - RESIDENTIAL (NEC ARTICLE 820)

BROADBAND COMMUNICATION WIRING - RESIDENTIAL (NEC ARTICLE 830)
EVERYBODY'S BUILDING CODE

TABLE OF CONTENTS
Primary Contact: Bruce Barker, inspectorbruce@cox.net, 623-328-8629
ACKNOWLEDGEMENTS

PREFACE

PREFACE FOR HOME INSPECTORS

THE TRUTH ABOUT BUILDING CODES

CHAPTER 1: BUILDING PERMITS AND CODE ADMINISTRATION
Buildings Governed by the IRC (R101.2)
Manufacturer's Instructions (R102.4)
Building Permits (R105)

CHAPTER 2: DEFINITIONS

CHAPTER 3: BUILDING DESIGN AND SAFETY
Seismic and Wind Design Areas (R301)
Fire Separation Between Buildings (R302)
Habitable Rooms Light and Ventilation (R303)
Bathroom Light and Ventilation (R303.3)
Outdoor Air Intake and Exhaust Openings (R303.4)
Stairway Lighting (R303.6)
Room Size and Ceiling Height Requirements (R304 and R305)
Plumbing Fixture Minimum Clearances and Requirements (R306,
307)
Safety Glazing (R308)
Fire Separation Between Garage and Home (R309)
Emergency Escape Openings (R310)
Hallways (R311.3)
Exterior Doors (R311.4)
Stairways (R311.5)
Handrails (R311.5.6)
Ramps (R311.6)
Guards (R312)
Smoke Alarms (R313)
Foam Plastic Insulation and Trim (R314)
Separation of Multiple Dwellings Contained in One Building (R317)
Wood on Concrete and Masonry, Wood in the Ground, Wood
Exposed to the Weather (R319)
Site Address (R321)