Adopts With Amendments:
International Residential Code 2018 (IRC 2018)
Part I — Administrative
Chapter 1 Scope and Administration
Part II — Definitions
Chapter 2 Definitions
Part III — Building Planning and Construction
Chapter 3 Building Planning
R301 Design Criteria
R302 Fire-Resistant Construction
R303 Light, Ventilation and Heating
R304 Minimum Room Areas
R305 Ceiling Height
R306 Sanitation
R307 Toilet, Bath and Shower Spaces
R308 Glazing
R309 Garages and Carports
R310 Emergency Escape and Rescue Openings
R311 Means of Egress
R312 Guards and Window Fall Protection
R313 Automatic Fire Sprinkler Systems
R314 Smoke Alarms
R315 Carbon Monoxide Alarms
R316 Foam Plastic
R317 Protection of Wood and Wood-Based Products Against Decay
R318 Protection Against Subterranean Termites
R319 Site Address
R320 Accessibility
R321 Elevators and Platform Lifts
R322 Flood-Resistant Construction
R323 Storm Shelters
R324 Solar Energy Systems
R325 Mezzanines
R326 Swimming Pools, Spas and Hot Tubs
R327 Stationary Storage Battery Systems
Chapter 4 Foundations
Chapter 5 Floors
Chapter 6 Wall Construction
Chapter 7 Wall Covering
Chapter 8 Roof-Ceiling Construction
Chapter 9 Roof Assemblies
Chapter 10 Chimneys and Fireplaces
Part IV — Energy Conservation
Chapter 11 [RE] Energy Efficiency
Part V — Mechanical
Chapter 12 Mechanical Administration
Chapter 13 General Mechanical System Requirements
Chapter 14 Heating and Cooling Equipment and Appliances
Chapter 15 Exhaust Systems
Chapter 16 Duct Systems
Chapter 17 Combustion Air
Chapter 18 Chimneys and Vents
Chapter 19 Special Appliances, Equipment and Systems
Chapter 20 Boilers and Water Heaters
Chapter 21 Hydronic Piping
Chapter 22 Special Piping and Storage Systems
Chapter 23 Solar Thermal Energy Systems
Part VI — Fuel Gas
Chapter 24 Fuel Gas
Part VII — Plumbing
Chapter 25 Plumbing Administration
Chapter 26 General Plumbing Requirements
Chapter 27 Plumbing Fixtures
Chapter 28 Water Heaters
Chapter 29 Water Supply and Distribution
Chapter 30 Sanitary Drainage
Chapter 31 Vents
Chapter 32 Traps
Chapter 33 Storm Drainage
Part VIII — Electrical
Chapter 34 General Requirements
Chapter 35 Electrical Definitions
Chapter 36 Services
Chapter 37 Branch Circuit and Feeder Requirements
Chapter 38 Wiring Methods
Chapter 39 Power and Lighting Distribution
Chapter 40 Devices and Luminaires
Chapter 41 Appliance Installation
Chapter 42 Swimming Pools
Chapter 43 Class 2 Remote-Control, Signaling and Power-Limited Circuits
Part IX — Referenced Standards
Chapter 44 Referenced Standards
Appendix A Sizing and Capacities of Gas Piping
Appendix B Sizing of Venting Systems Serving Appliances Equipped With Draft Hoods, Category I Appliances and Appliances Listed for Use With Type B Vents
Appendix C Exit Terminals of Mechanical Draft and Direct-Vent Venting Systems
Appendix D Recommended Procedure for Safety Inspection of an Existing Appliance Installation
Appendix E Manufactured Housing Used as Dwellings
Appendix F Radon Control Methods
Appendix G Piping Standards for Various Applications
Appendix H Patio Covers
Appendix I Private Sewage Disposal
Appendix J Existing Buildings and Structures
Appendix K Sound Transmission
Appendix L Permit Fees
Appendix M Home Day Care—R-3 Occupancy
Appendix N Venting Methods
Appendix O Automatic Vehicular Gates
Appendix P Sizing of Water Piping System
Appendix Q Tiny Houses
Appendix R Light Straw-Clay Construction
Appendix S Strawbale Construction
Appendix T [RE] Solar-Ready Provisions—Detached One- And Two-Family Dwellings and Townhouses
User note:
About this chapter: Chapter 3 contains a wide array of building planning requirements that are critical to designing a safe and usable building. This includes, but is not limited to, requirements related to: general structural design, fire-resistant construction, light, ventilation, sanitation, plumbing fixture clearances, minimum room area and ceiling height, safety glazing, means of egress, automatic fire sprinkler systems, smoke and carbon monoxide alarm systems, accessibility, solar energy systems, swimming pools, spas and hot tubs.
Habitable space, hallways and portions of basements containing these spaces shall have a ceiling height of not less than 7 feet (2134 mm). Bathrooms, toilet rooms and laundry rooms shall have a ceiling height of not less than 6 feet 8 inches (2032 mm).
Exceptions:
- For rooms with sloped ceilings, the required floor area of the room shall have a ceiling height of not less than 5 feet (1524 mm) and not less than 50 percent of the required floor area shall have a ceiling height of not less than 7 feet (2134 mm).
- The ceiling height above bathroom and toilet room fixtures shall be such that the fixture is capable of being used for its intended purpose. A shower or tub equipped with a showerhead shall have a ceiling height of not less than 6 feet 8 inches (2032 mm) above an area of not less than 30 inches (762 mm) by 30 inches (762 mm) at the showerhead.
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Every dwelling unit shall be provided with a water closet, lavatory, and a bathtub or shower.
Each dwelling unit shall be provided with a kitchen area and every kitchen area shall be provided with a sink.
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Plumbing fixtures shall be connected to a sanitary sewer or to an approved private sewage disposal system.
Plumbing fixtures shall be connected to an approved water supply. Kitchen sinks, lavatories, bathtubs, showers, bidets, laundry tubs and washing machine outlets shall be provided with hot and cold water.
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