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International Residential Code
Code Compare
Chapter 1
Scope and Administration
Chapter 2
Definitions
Chapter 3
Building Planning
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
Chapter 11
Building Thermal Envelope and Insulation
Chapter 12
Interior Finishes
Chapter 13
Energy Efficiency
Chapter 14
Exterior Walls
Chapter 15
Roof Assemblies and Rooftop Structures
Chapter 16
Structural Design
Chapter 17
Foundations and Soils
Chapter 18
Concrete
Chapter 19
Steel
Chapter 20
Wood
Chapter 21
Masonry
Chapter 22
Glass and Glazing
Chapter 23
Gypsum Board and Plaster
Chapter 24
Plastics
Chapter 25
Electrical
Chapter 26
Mechanical Systems
Chapter 27
Plumbing Systems
Chapter 28
Elevators
Chapter 29
Encroachments Into Public Right-of-Way
Chapter 30
Safeguards During Construction
Chapter 31
Means of Egress
Chapter 32
Accessibility
Chapter 33
Interior Environment
Chapter 34
Exterior Walls
Chapter 35
Reserved for Future Use
Chapter 36
Referenced Standards
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Home / Code Library / massachusetts / International Residential Code 2021 / Chapter 3
Adopts With Amendments
Chapter 3

Building Planning

International Residential Code 2021

[F] 301.1 Application

Section 301.1 — Application. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 301.1.1 Building Planning General

Section 301.1.1Building Planning General. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 301.1.2 Climatic Design Criteria

Section 301.1.2 — Climatic Design Criteria. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 301.1.3 Design Live Loads

Section 301.1.3 — Design Live Loads. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
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[F] 301.1.4 Dead Loads

Section 301.1.4 — Dead Loads. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
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[F] 301.1(1) Design Criteria - Application

Section 301.1(1) — Design Criteria - Application. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 301.2 Climatic and Geographic Design Criteria

Section 301.2 — Climatic and Geographic Design Criteria. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 301.2.1 Climatic and Geographic Design Criteria

Section 301.2.1 — Climatic and Geographic Design Criteria. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 301.2.1(1) Wind Design Criteria - General

Section 301.2.1(1) — Wind Design Criteria - General. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 301.2.2 Seismic Provisions

Section 301.2.2 — Seismic Provisions. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 301.2.2(1) Seismic Provisions - General

Section 301.2.2(1) — Seismic Provisions - General. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 301.2.3 Snow Loads

Section 301.2.3 — Snow Loads. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
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[F] 301.2(1) Climatic and Geographic Design Criteria

Section 301.2(1) — Climatic and Geographic Design Criteria. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 301.3 Wind Design Criteria

Section 301.3 — Wind Design Criteria. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 301.3.1 Story Height

Section 301.3.1Story Height. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] 301.4 Seismic Design Criteria

Section 301.4 — Seismic Design Criteria. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 302.1 Exterior Walls - IRC

Section 302.1 — Exterior Walls - IRC. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 302.1.1 Exterior Walls

Section 302.1.1 — Exterior Walls. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 302.1.2 Dwelling Unit Separation

Section 302.1.2Dwelling Unit Separation. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 302.2 Townhouse Separation

Section 302.2 — Townhouse Separation. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
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[F] 302.2.1 Townhouse Separation

Section 302.2.1 — Townhouse Separation. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
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[F] 302.5 Dwelling/Garage Separation

Section 302.5 — Dwelling/Garage Separation. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 302.6 Dwelling/Garage Opening/Penetration

Section 302.6 — Dwelling/Garage Opening/Penetration. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 303.1 Light

Section 303.1 — Light. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 303.1.1 Light Requirements

Section 303.1.1 — Light Requirements. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 303.2 Habitable Rooms - Ventilation

Section 303.2 — Habitable Rooms - Ventilation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
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[F] 303.3 Bathrooms - Ventilation

Section 303.3 — Bathrooms - Ventilation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
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[F] 304.1 Minimum Room Areas

Section 304.1 — Minimum Room Areas. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] 304.1.1 Minimum Room Areas

Section 304.1.1 — Minimum Room Areas. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] 305.1 Ceiling Height

Section 305.1 — Ceiling Height. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] 305.1.1 Ceiling Height

Section 305.1.1 — Ceiling Height. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] 306.1.1 Sanitation

Section 306.1.1 — Sanitation. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 307.1.1 Garages and Carports

Section 307.1.1 — Garages and Carports. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 308.1.1 Glazing in Hazardous Locations

Section 308.1.1 — Glazing in Hazardous Locations. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 309.1.1 Stairway Requirements

Section 309.1.1 — Stairway Requirements. This section addresses means of egress requirements including travel distances, widths, and component specifications. Refer to the official code text for complete requirements.
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[F] 310.1 Emergency Escape and Rescue Openings

Section 310.1 — Emergency Escape and Rescue Openings. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 310.1.1 Emergency Escape and Rescue

Section 310.1.1 — Emergency Escape and Rescue. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 310.2 Emergency Escape Window Dimensions

Section 310.2 — Emergency Escape Window Dimensions. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 310.2.1 Minimum Opening Dimensions

Section 310.2.1 — Minimum Opening Dimensions. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 311.1 Means of Egress

Section 311.1Means of Egress. This section addresses means of egress requirements including travel distances, widths, and component specifications. Refer to the official code text for complete requirements.
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[F] 311.1.1 Guards

Section 311.1.1 — Guards. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 311.3 Floors and Landings at Exterior Doors

Section 311.3 — Floors and Landings at Exterior Doors. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 311.7 Stairways

Section 311.7 — Stairways. This section addresses means of egress requirements including travel distances, widths, and component specifications. Refer to the official code text for complete requirements.
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[F] 311.7.5 Handrails

Section 311.7.5 — Handrails. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 312.1 Guards Required

Section 312.1 — Guards Required. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 312.1.3 Guard Opening Limitations

Section 312.1.3Guard Opening Limitations. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] 312.2 Guard Height

Section 312.2Guard Height. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] 313.1 Townhouse Automatic Fire Sprinkler Systems

Section 313.1 — Townhouse Automatic Fire Sprinkler Systems. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] 313.2 One- and Two-Family Dwellings Automatic Fire Sprinkler Systems

Section 313.2 — One- and Two-Family Dwellings Automatic Fire Sprinkler Systems. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] 314.1 Smoke Alarms

Section 314.1 — Smoke Alarms. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] 315.1 Carbon Monoxide Alarms

Section 315.1 — Carbon Monoxide Alarms. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] R301 Design Criteria

Section R301 — Design Criteria. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.1 Application

Section R301.1 — Application. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.1.1 Building Planning - Wind Design Criteria

Section R301.1.1 — Building Planning - Wind Design Criteria. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.1.2 Building Planning - Seismic Design Categories

Section R301.1.2 — Building Planning - Seismic Design Categories. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.1.3 Engineered Design

Section R301.1.3 — Engineered Design. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.2 Climatic and Geographic Design Criteria

Section R301.2 — Climatic and Geographic Design Criteria. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.2.1 Wind Design Criteria

Section R301.2.1 — Wind Design Criteria. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.2.1.1 Wind Limitations

Section R301.2.1.1 — Wind Limitations. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.2.1.2 Protection of openings

Section R301.2.1.2 — Protection of openings. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.2.1.4 Building Planning - Exposure Category

Section R301.2.1.4 — Building Planning - Exposure Category. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.2.2 Seismic Design

Section R301.2.2 — Seismic Design. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.2.2.1 Building Planning - Seismic Provisions

Section R301.2.2.1 — Building Planning - Seismic Provisions. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.2.2.2 Wind Protection of Openings

Section R301.2.2.2 — Wind Protection of Openings. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.2.2.3 Seismic Design Category D

Section R301.2.2.3 — Seismic Design Category D. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.2.3 Snow Loads

Section R301.2.3 — Snow Loads. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
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[F] R301.2.4 Floodplain Construction

Section R301.2.4 — Floodplain Construction. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
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[F] R301.3 Story Height

Section R301.3 — Story Height. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] R301.3.1 Story Height IRC

Section R301.3.1 — Story Height IRC. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] R301.4 Dead Load

Section R301.4 — Dead Load. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
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[F] R301.5 Live Load

Section R301.5 — Live Load. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
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[F] R301.6 Roof loads

Section R301.6 — Roof loads. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
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[F] R301.7 Deflection

Section R301.7 — Deflection. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R301.8 Nominal Sizes

Section R301.8 — Nominal Sizes. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R302 Fire-Resistant Construction

Section R302 — Fire-Resistant Construction. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] R302.1 Exterior Walls

Section R302.1 — Exterior Walls. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R302.1.1 Exterior Wall Fire-Resistance Rating

Section R302.1.1 — Exterior Wall Fire-Resistance Rating. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] R302.1(1) Exterior Walls Fire Separation Distance

Section R302.1(1) — Exterior Walls Fire Separation Distance. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] R302.10 Fire Sprinkler Systems - Townhouse

Section R302.10 — Fire Sprinkler Systems - Townhouse. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] R302.10.1 Fireblocking Materials

Section R302.10.1 — Fireblocking Materials. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] R302.11 Fireblocking

Section R302.11 — Fireblocking. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] R302.11.1 Fireblocking Locations

Section R302.11.1 — Fireblocking Locations. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] R302.12 Draftstopping

Section R302.12 — Draftstopping. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R302.13 Fire Protection of Floors

Section R302.13 — Fire Protection of Floors. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] R302.2 Townhouses

Section R302.2 — Townhouses. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
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[F] R302.2.1 Townhouse Separation

Section R302.2.1 — Townhouse Separation. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
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[F] R302.2.2 Townhouse Parapets

Section R302.2.2 — Townhouse Parapets. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
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[F] R302.2.3 Structural independence

Section R302.2.3 — Structural independence. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
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[F] R302.3 Two-Family Dwellings

Section R302.3 — Two-Family Dwellings. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R302.3.1 Two-Family Dwelling Separation

Section R302.3.1 — Two-Family Dwelling Separation. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R302.4 Dwelling/garage separation

Section R302.4 — Dwelling/garage separation. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R302.4.1 Garage door openings

Section R302.4.1 — Garage door openings. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R302.4.2 Other penetrations

Section R302.4.2 — Other penetrations. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R302.5 Dwelling-Garage Opening and Penetration Protection

Section R302.5 — Dwelling-Garage Opening and Penetration Protection. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R302.5.1 Garage Duct Penetrations

Section R302.5.1 — Garage Duct Penetrations. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
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[F] R302.6 Dwelling/Garage Opening Protection

Section R302.6 — Dwelling/Garage Opening Protection. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R302.6.1 Dwelling-Garage Fire Separation

Section R302.6.1 — Dwelling-Garage Fire Separation. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] R302.7 Under-Stair Protection

Section R302.7 — Under-Stair Protection. This section addresses means of egress requirements including travel distances, widths, and component specifications. Refer to the official code text for complete requirements.
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[F] R302.8 Flame Spread and Smoke Density

Section R302.8 — Flame Spread and Smoke Density. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R302.8.1 Fireblocking materials

Section R302.8.1 — Fireblocking materials. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
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[F] R302.9 Draftstopping

Section R302.9 — Draftstopping. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R302.9.1 Draftstopping in floors

Section R302.9.1 — Draftstopping in floors. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R303 Light, Ventilation, and Heating

Section R303 — Light, Ventilation, and Heating. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
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[F] R303.1 Habitable Rooms - Light and Ventilation

Section R303.1 — Habitable Rooms - Light and Ventilation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
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[F] R303.1.1 Habitable Room Lighting

Section R303.1.1 — Habitable Room Lighting. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R303.10 Room dimensions

Section R303.10 — Room dimensions. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R303.2 Adjoining rooms

Section R303.2 — Adjoining rooms. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R303.2.1 Bathroom Ventilation

Section R303.2.1 — Bathroom Ventilation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
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[F] R303.3 Bathrooms - Ventilation

Section R303.3 — Bathrooms - Ventilation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
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[F] R303.4 Mechanical Ventilation

Section R303.4 — Mechanical Ventilation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
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[F] R303.5 Opening location

Section R303.5 — Opening location. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R303.6 Stairway illumination

Section R303.6 — Stairway illumination. This section addresses means of egress requirements including travel distances, widths, and component specifications. Refer to the official code text for complete requirements.
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[F] R303.7 Interior Room Dimensions

Section R303.7 — Interior Room Dimensions. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R303.8 Required Heating

Section R303.8 — Required Heating. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R303.9 Ceiling Height

Section R303.9 — Ceiling Height. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] R304 Minimum Room Areas

Section R304 — Minimum Room Areas. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] R304.1 Minimum Room Area

Section R304.1 — Minimum Room Area. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] R304.1.1 Minimum Room Size

Section R304.1.1 — Minimum Room Size. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R304.2 Other rooms

Section R304.2 — Other rooms. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R304.3 Minimum Dimensions

Section R304.3 — Minimum Dimensions. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R304.4 Height Effect on Room Area

Section R304.4 — Height Effect on Room Area. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] R305 Ceiling Height

Section R305 — Ceiling Height. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] R305.1 Minimum Height

Section R305.1 — Minimum Height. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] R305.1.1 Basement Ceiling Height

Section R305.1.1 — Basement Ceiling Height. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
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[F] R305.2 Furred Ceiling

Section R305.2 — Furred Ceiling. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R306.1 Toilet Facilities

Section R306.1 — Toilet Facilities. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R306.2 Kitchen

Section R306.2 — Kitchen. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R306.3 Sewage Disposal

Section R306.3 — Sewage Disposal. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R306.4 Water closet clearance

Section R306.4 — Water closet clearance. This section covers plumbing system requirements. Specific sizing, materials, and installation methods are in the official code text. Refer to the official code text for complete requirements.
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[F] R307.1 Space Required Fixtures

Section R307.1 — Space Required Fixtures. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R307.2 Toilet Facilities Clearance

Section R307.2 — Toilet Facilities Clearance. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R308.1 Identification - Safety Glazing

Section R308.1 — Identification - Safety Glazing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R308.2 Where required

Section R308.2 — Where required. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R308.3 Human Impact Loads

Section R308.3 — Human Impact Loads. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
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[F] R308.4 Safety Glazing - Hazardous Locations

Section R308.4 — Safety Glazing - Hazardous Locations. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R308.4.1 Glazing adjacent to doors

Section R308.4.1 — Glazing adjacent to doors. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R308.4.2 Glazing Adjacent to Doors

Section R308.4.2 — Glazing Adjacent to Doors. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R308.4.3 Glazing near stairways

Section R308.4.3 — Glazing near stairways. This section addresses means of egress requirements including travel distances, widths, and component specifications. Refer to the official code text for complete requirements.
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[F] R308.4.4 Glazing near floors

Section R308.4.4 — Glazing near floors. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R308.4.5 Glazing Adjacent to Stairs and Ramps

Section R308.4.5 — Glazing Adjacent to Stairs and Ramps. This section addresses means of egress requirements including travel distances, widths, and component specifications. Refer to the official code text for complete requirements.
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[F] R308.4.7 Glazing Adjacent to Hot Tubs and Spas

Section R308.4.7 — Glazing Adjacent to Hot Tubs and Spas. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R308.6 Safety Glazing - Skylights and Sloped Glazing

Section R308.6 — Safety Glazing - Skylights and Sloped Glazing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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[F] R309.1 Opening Protection - Garages

Section R309.1 — Opening Protection - Garages. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
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Code sections are sourced from the International Code Council (ICC) and NFPA. Refer to ICC Digital Codes or NFPA for the authoritative source documents.