Adopts With Amendments
Chapter 4
Foundations
International Residential Code 2021
[F] 401.1 Application - Foundations
Section 401.1 — Application - Foundations. 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.
[F] 401.1.1 Foundation Scope
Section 401.1.1 — Foundation Scope. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
[F] 401.2 Foundation Requirements
Section 401.2 — Foundation Requirements. 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.
[F] 401.2.1 Foundation Materials
Section 401.2.1 — Foundation Materials. 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.
[F] 401.3 Drainage
Section 401.3 — Drainage. 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.
[F] 401.4 Soil Tests
Section 401.4 — Soil Tests. 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.
[F] 401.4.1 Presumptive Load-Bearing Values
Section 401.4.1 — Presumptive Load-Bearing Values. 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.
[F] 402.1 Wood Foundations
Section 402.1 — Wood Foundations. 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.
[F] 402.1.1 Concrete Footings
Section 402.1.1 — Concrete Footings. 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.
[F] 402.2 Footings in Flood Hazard Areas
Section 402.2 — Footings in Flood Hazard 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.
[F] 403.1 General Footing Requirements
Section 403.1 — General Footing 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.
[F] 403.1.1 Minimum Size - Footings
Section 403.1.1 — Minimum Size - Footings. 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.
[F] 403.1.3 Footing Seismic Reinforcement
Section 403.1.3 — Footing Seismic Reinforcement. 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.
[F] 403.1.4 Minimum Footing Depth
Section 403.1.4 — Minimum Footing Depth. 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.
[F] 403.1.4.1 Frost-Protected Shallow Foundations
Section 403.1.4.1 — Frost-Protected Shallow Foundations. 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.
[F] 403.1.6 Foundation Anchorage
Section 403.1.6 — Foundation Anchorage. 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.
[F] 403.2 Footings for Accessory Buildings
Section 403.2 — Footings for Accessory Buildings. 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.
[F] 404.1 Foundation Walls
Section 404.1 — Foundation Walls. 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.
[F] 404.1.1 Foundation Walls
Section 404.1.1 — Foundation Walls. 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.
[F] 404.1.2 Foundation Wall Thickness
Section 404.1.2 — Foundation Wall Thickness. 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.
[F] 404.1.3 Foundation Wall Thickness
Section 404.1.3 — Foundation Wall Thickness. 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.
[F] 404.1.5 Foundation Wall Drainage
Section 404.1.5 — Foundation Wall Drainage. 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.
[F] 404.1.6 Height Above Finished Grade
Section 404.1.6 — Height Above Finished Grade. 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.
[F] 404.2 Masonry Foundation Walls
Section 404.2 — Masonry Foundation Walls. 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.
[F] 405.1 Foundation Drainage
Section 405.1 — Foundation Drainage. 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.
[F] 405.1.1 Foundation Drainage
Section 405.1.1 — Foundation Drainage. 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.
[F] 406.1 Dampproofing
Section 406.1 — Dampproofing. 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.
[F] 406.2 Waterproofing
Section 406.2 — Waterproofing. 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.
[F] 407.1 Columns
Section 407.1 — Columns. 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.
[F] 408.1 Columns - General
Section 408.1 — Columns - 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.
[F] 408.2 Under-Floor Space - Ventilation
Section 408.2 — Under-Floor Space - Ventilation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 408.3 Unvented Crawl Space
Section 408.3 — Unvented Crawl Space. 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.
[F] R401 General Foundation Requirements
Section R401 — General Foundation Requirements. 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.
[F] R401.1 Foundations General Scope
Section R401.1 — Foundations General Scope. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
[F] R401.1.1 Foundation Design General
Section R401.1.1 — Foundation Design General. 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.
[F] R401.2 Requirements
Section R401.2 — 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.
[F] R401.3 Drainage
Section R401.3 — Drainage. 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.
[F] R401.4 Soil Tests
Section R401.4 — Soil Tests. 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.
[F] R402 Materials
Section R402 — 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.
[F] R402.1 Soil Tests
Section R402.1 — Soil Tests. 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.
[F] R402.1.1 Soil Tests
Section R402.1.1 — Soil Tests. 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.
[F] R402.2 Concrete Minimum Compressive Strength
Section R402.2 — Concrete Minimum Compressive Strength. 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.
[F] R402.3 Precast Concrete Foundations
Section R402.3 — Precast Concrete Foundations. 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.
[F] R403 Footings
Section R403 — Footings. 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.
[F] R403.1 Footings - General
Section R403.1 — Footings - 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.
[F] R403.1.1 Footing Requirements
Section R403.1.1 — Footing 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.
[F] R403.1.2 Continuous Footings
Section R403.1.2 — Continuous Footings. 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.
[F] R403.1.3 Footing Seismic Reinforcement
Section R403.1.3 — Footing Seismic Reinforcement. 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.
[F] R403.1.3.1 Reinforcement Lap Splices
Section R403.1.3.1 — Reinforcement Lap Splices. 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.
[F] R403.1.4 Minimum Depth of Footings
Section R403.1.4 — Minimum Depth of Footings. 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.
[F] R403.1.4.1 Frost Protection
Section R403.1.4.1 — Frost 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.
[F] R403.1.5 Slope Setbacks
Section R403.1.5 — Slope Setbacks. 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.
[F] R403.1.6 Foundation Anchorage
Section R403.1.6 — Foundation Anchorage. 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.
[F] R403.1.6.1 Foundation Anchorage in Seismic Design Categories D0 D1 and D2
Section R403.1.6.1 — Foundation Anchorage in Seismic Design Categories D0 D1 and D2. 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.
[F] R403.1.7 Footings on or Adjacent to Slopes
Section R403.1.7 — Footings on or Adjacent to Slopes. 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.
[F] R403.2 Column Footings
Section R403.2 — Column Footings. 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.
[F] R403.3 Frost-Protected Shallow Foundations
Section R403.3 — Frost-Protected Shallow Foundations. 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.
[F] R403.4 Precast concrete footings
Section R403.4 — Precast concrete footings. 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.
[F] R404 Foundation and Retaining Walls
Section R404 — Foundation and Retaining Walls. 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.
[F] R404.1 Concrete and Masonry Foundation Walls
Section R404.1 — Concrete and Masonry Foundation Walls. 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.
[F] R404.1.1 Concrete Foundation Walls
Section R404.1.1 — Concrete Foundation Walls. 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.
[F] R404.1.2 Reinforcement for Foundation Walls
Section R404.1.2 — Reinforcement for Foundation Walls. 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.
[F] R404.1.3 Masonry Foundation Wall Reinforcement
Section R404.1.3 — Masonry Foundation Wall Reinforcement. 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.
[F] R404.1.4 Concrete and Masonry Wall Reinforcement
Section R404.1.4 — Concrete and Masonry Wall Reinforcement. 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.
[F] R404.1.5 Precast Concrete Foundation Walls
Section R404.1.5 — Precast Concrete Foundation Walls. 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.
[F] R404.1.6 Height Above Finished Grade
Section R404.1.6 — Height Above Finished Grade. 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.
[F] R404.1.7 Backfill Protection
Section R404.1.7 — Backfill 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.
[F] R404.1.8 Rubble Stone Foundation Walls
Section R404.1.8 — Rubble Stone Foundation Walls. 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.
[F] R404.1.9 Pier and Curtain Wall Foundations
Section R404.1.9 — Pier and Curtain Wall Foundations. 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.
[F] R404.2 Wood Foundation Walls
Section R404.2 — Wood Foundation Walls. 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.
[F] R404.3 Wood Sill Plates
Section R404.3 — Wood Sill Plates. 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.
[F] R404.4 Retaining Walls
Section R404.4 — Retaining 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.
[F] R405 Foundation Drainage
Section R405 — Foundation Drainage. 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.
[F] R405.1 Concrete or Masonry Foundations - Drainage
Section R405.1 — Concrete or Masonry Foundations - Drainage. 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.
[F] R405.1.1 Foundation Drain Location
Section R405.1.1 — Foundation Drain Location. 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.
[F] R405.2 Wood Foundation Drainage
Section R405.2 — Wood Foundation Drainage. 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.
[F] R405.3 Drainage Pipe
Section R405.3 — Drainage Pipe. 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.
[F] R406 Foundation Waterproofing and Dampproofing
Section R406 — Foundation Waterproofing and Dampproofing. 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.
[F] R406.1 Concrete and Masonry Foundation Dampproofing
Section R406.1 — Concrete and Masonry Foundation Dampproofing. 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.
[F] R406.1.1 Foundation Waterproofing and Dampproofing
Section R406.1.1 — Foundation Waterproofing and Dampproofing. 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.
[F] R406.2 Concrete and Masonry Foundation Waterproofing
Section R406.2 — Concrete and Masonry Foundation Waterproofing. 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.
[F] R406.2.1 Waterproofing Application
Section R406.2.1 — Waterproofing Application. 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.
[F] R406.3 Drainage System
Section R406.3 — Drainage System. 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.
[F] R406.4 Wood Foundation Moisture Control
Section R406.4 — Wood Foundation Moisture Control. 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.
[F] R407.1 Columns - Wood Column Protection
Section R407.1 — Columns - Wood Column Protection. 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.
[F] R407.2 Steel Column Protection
Section R407.2 — Steel Column Protection. 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.
[F] R408 Under-Floor Space
Section R408 — Under-Floor Space. 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.
[F] R408.1 Ventilation of Under-Floor Spaces
Section R408.1 — Ventilation of Under-Floor Spaces. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] R408.1.1 Under-Floor Space Ventilation
Section R408.1.1 — Under-Floor Space Ventilation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] R408.2 Openings for Under-Floor Ventilation
Section R408.2 — Openings for Under-Floor Ventilation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] R408.3 Under-Floor Space as Plenum
Section R408.3 — Under-Floor Space as Plenum. 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.
[F] R408.4 Access
Section R408.4 — Access. 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.
[F] R408.5 Removal of Debris
Section R408.5 — Removal of Debris. 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.
[F] R408.6 Finished Grade
Section R408.6 — Finished Grade. 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.
[F] R408.7 Flood Resistance
Section R408.7 — Flood Resistance. 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.
Code sections are sourced from the International Code Council (ICC) and NFPA. Refer to ICC Digital Codes or NFPA for the authoritative source documents.