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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 / washington / International Residential Code 2021 / Chapter 20
Adopts With Amendments
Chapter 20

Wood

International Residential Code 2021

[F] 2001.1 Scope

Section 2001.1 — Scope. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
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[F] 2001.1.1 Scope of Boilers and Water Heaters

Section 2001.1.1 — Scope of Boilers and Water Heaters. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
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[F] 2001.2.1 Exhaust Systems Scope

Section 2001.2.1 — Exhaust Systems Scope. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
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[F] 2002.1 Hydronic Piping Materials

Section 2002.1 — Hydronic Piping Materials. 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] 2002.1.1 Water Heater Installation

Section 2002.1.1 — Water Heater Installation. 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] 2002.2 Copper Tubing

Section 2002.2 — Copper Tubing. 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] 2002.3 Water Heater Location

Section 2002.3 — Water Heater Location. 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] 2002.4 Water Heater Pan

Section 2002.4 — Water Heater Pan. 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] 2003.1 Hydronic System Design

Section 2003.1 — Hydronic System 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] 2003.1.1 Relief Valve Requirements

Section 2003.1.1 — Relief Valve 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] 2003.2 Expansion Tanks

Section 2003.2 — Expansion Tanks. 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] 2003.3 Pressure and Temperature Relief

Section 2003.3 — Pressure and Temperature Relief. 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] 2003.4 Backflow Protection

Section 2003.4 — Backflow 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] 2004.1 Piping Support

Section 2004.1 — Piping Support. 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] 2004.2 Piping Insulation

Section 2004.2 — Piping Insulation. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
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[F] 2005.1 Joints and Connections - General

Section 2005.1 — Joints and Connections - 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] 2005.2 Soldered Joints

Section 2005.2 — Soldered Joints. 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] 2005.3 Mechanical Joints

Section 2005.3 — Mechanical Joints. 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] 2006.1 System Testing

Section 2006.1 — System Testing. 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] G2401.1 General Fuel Gas Scope

Section G2401.1 — General Fuel Gas Scope. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
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[F] M2001.1 Scope - Boilers

Section M2001.1 — Scope - Boilers. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
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[F] M2001.1.1 Hydronic Piping Materials

Section M2001.1.1 — Hydronic Piping Materials. 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] M2001.1.2 Expansion Tanks

Section M2001.1.2 — Expansion Tanks. 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] M2001.1.3 Pressure Relief Valves

Section M2001.1.3 — Pressure Relief Valves. 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] M2001.2 Boiler Standards

Section M2001.2 — Boiler Standards. 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] M2001.3 Water heater location

Section M2001.3 — Water heater location. 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] M2001.4 Safety Valves

Section M2001.4 — Safety Valves. 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] M2001.5 Expansion Tanks

Section M2001.5 — Expansion Tanks. 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] M2001.6 Gauges

Section M2001.6 — Gauges. 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] M2002.1 Safety Controls

Section M2002.1 — Safety Controls. 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] M2002.2 Relief valve discharge

Section M2002.2 — Relief valve discharge. 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] M2002.3 Relief Valve Discharge

Section M2002.3 — Relief Valve Discharge. 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] M2002.4 Seismic Bracing

Section M2002.4 — Seismic Bracing. 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] M2002.5 Pan Requirements

Section M2002.5 — Pan 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] M2003.1 Expansion Tanks

Section M2003.1 — Expansion Tanks. 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] M2004.1 Water heater seismic bracing

Section M2004.1 — Water heater seismic bracing. 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] M2005.1 General - Water Heater Installation

Section M2005.1 — General - Water Heater Installation. 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] M2005.2 Water Heater T&P Relief Valve

Section M2005.2 — Water Heater T&P Relief Valve. 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] M2006.1 Water Heater Installation

Section M2006.1 — Water Heater Installation. 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] M2006.2 Water Heater Location

Section M2006.2 — Water Heater Location. 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] M2006.3 Temperature and Pressure Relief

Section M2006.3 — Temperature and Pressure Relief. 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] M2006.4 Relief Valve Discharge

Section M2006.4 — Relief Valve Discharge. 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] M2006.5 Drain Pans

Section M2006.5 — Drain Pans. 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] M2007.1 Boiler Installation

Section M2007.1 — Boiler Installation. 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] M2007.2 Boiler Controls

Section M2007.2 — Boiler Controls. 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] M2007.3 Expansion Tanks

Section M2007.3 — Expansion Tanks. 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] M2101.1 Scope of Fuel Gas

Section M2101.1 — Scope of Fuel Gas. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
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[F] M2101.2 Hydronic Piping Materials

Section M2101.2 — Hydronic Piping Materials. 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] M2103.1 Radiant Floor Heating Systems

Section M2103.1 — Radiant Floor Heating Systems. 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] P2001.1 Scope - Plumbing General

Section P2001.1 — Scope - Plumbing General. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
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[F] P2001.2 Drainage General

Section P2001.2 — Drainage General. 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] P2002.1 Protection of Pipes

Section P2002.1 — Protection of Pipes. 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] P2002.2 Drainage Pipe Slope

Section P2002.2 — Drainage Pipe Slope. 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] P2002.3 Drainage Pipe Materials

Section P2002.3 — Drainage Pipe Materials. 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] P2003.1 Building Sewer

Section P2003.1 — Building Sewer. 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] P2003.2 Sewer Connection

Section P2003.2 — Sewer Connection. 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] P2004.1 Cleanouts

Section P2004.1 — Cleanouts. 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] P2004.2 Cleanout Size

Section P2004.2 — Cleanout 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] P2005.1 Sumps and Ejectors

Section P2005.1 — Sumps and Ejectors. 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] P2601 General Plumbing

Section P2601 — General Plumbing. 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] P2601.1 Scope - IRC Plumbing General

Section P2601.1 — Scope - IRC Plumbing General. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
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[F] P2602.1 Individual Water Supply

Section P2602.1 — Individual Water Supply. 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] P3001.1 Drainage System General

Section P3001.1 — Drainage System General. 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] P3002.1 Drainage Piping Materials

Section P3002.1 — Drainage Piping Materials. 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] P3005.1 Drainage Pipe Sizing

Section P3005.1 — Drainage Pipe Sizing. 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] R2001.1 Scope - Boilers and water heaters

Section R2001.1 — Scope - Boilers and water heaters. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
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[F] R2001.1.1 Heating and Cooling Equipment Scope

Section R2001.1.1 — Heating and Cooling Equipment Scope. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
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[F] R2001.2 Boiler Standards

Section R2001.2 — Boiler Standards. 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] R2002.1 General Boilers

Section R2002.1 — General Boilers. 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] R2002.2 Temperature and Pressure Relief

Section R2002.2 — Temperature and Pressure Relief. 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] R2002.3 Relief Valve Discharge

Section R2002.3 — Relief Valve Discharge. 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] R2002.4 Seismic Strapping

Section R2002.4 — Seismic Strapping. 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] R2003.1 Pool Barriers

Section R2003.1 — Pool Barriers. 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] R2003.2 Openings in Barriers

Section R2003.2 — Openings in Barriers. 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] R2003.3 Gates

Section R2003.3 — Gates. 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] R2004.1 Entrapment Protection

Section R2004.1 — Entrapment 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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Code sections are sourced from the International Code Council (ICC) and NFPA. Refer to ICC Digital Codes or NFPA for the authoritative source documents.