Adopts With Amendments
Chapter 18
Soils and Foundations
International Building Code 2021
[F] 1801 General
Section 1801 — 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] 1801.1 Soils and Foundations Scope
Section 1801.1 — Soils and Foundations 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] 1801.1.1 Soils and Foundations Scope
Section 1801.1.1 — Soils and Foundations 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] 1801.1.2 Geotechnical Investigation
Section 1801.1.2 — Geotechnical Investigation. 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] 1801.2 Foundation Design
Section 1801.2 — Foundation Design. 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] 1801.2.1 Soils and Foundations Scope
Section 1801.2.1 — Soils and Foundations 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] 1801.3 Foundation Design Soil Investigation
Section 1801.3 — Foundation Design Soil Investigation. 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] 1802 Foundation and Soils Investigations
Section 1802 — Foundation and Soils Investigations. 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] 1802.1 Definitions
Section 1802.1 — Definitions. This section provides definitions relevant to the code. Defined terms have specific meanings that affect how requirements are applied throughout the code. Refer to the official code text for complete requirements.
[F] 1802.1.1 Foundation Design Loads
Section 1802.1.1 — Foundation Design 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.
[F] 1802.1.2 Presumptive Bearing Capacity
Section 1802.1.2 — Presumptive Bearing Capacity. 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] 1802.2 Soil classification
Section 1802.2 — Soil classification. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
[F] 1802.3 Soil Classification
Section 1802.3 — Soil Classification. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
[F] 1802.4 Investigation Depth
Section 1802.4 — Investigation 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] 1802.5 Rock Strata
Section 1802.5 — Rock Strata. 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] 1802.6 Reporting
Section 1802.6 — Reporting. 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] 1803 Excavation, Grading, and Fill
Section 1803 — Excavation, Grading, and Fill. 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] 1803.1 Geotechnical Investigations Required
Section 1803.1 — Geotechnical Investigations 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.
[F] 1803.1.1 Geotechnical Investigation Requirements
Section 1803.1.1 — Geotechnical Investigation 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] 1803.1.2 Deep Foundations
Section 1803.1.2 — Deep 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] 1803.2 Expansive Soils
Section 1803.2 — Expansive Soils. 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] 1803.3 Soil classification
Section 1803.3 — Soil classification. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
[F] 1803.4 Liquefaction Study
Section 1803.4 — Liquefaction Study. 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] 1803.5 Investigations Required
Section 1803.5 — Investigations 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.
[F] 1803.5.1 Liquefaction Study
Section 1803.5.1 — Liquefaction Study. 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] 1803.5.2 Expansive Soil Study
Section 1803.5.2 — Expansive Soil Study. 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] 1803.5.3 Drainage and Erosion
Section 1803.5.3 — Drainage and Erosion. 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] 1803.6 Liquefaction and Soil Strength Loss
Section 1803.6 — Liquefaction and Soil Strength Loss. 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] 1804.1 Excavation Near Foundations
Section 1804.1 — Excavation Near 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] 1804.1.1 Dampproofing and Waterproofing
Section 1804.1.1 — Dampproofing and 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] 1804.1.2 Foundation Drainage
Section 1804.1.2 — 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] 1804.2 Placement of Backfill
Section 1804.2 — Placement of Backfill. 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] 1804.3 Site Grading
Section 1804.3 — Site Grading. 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] 1805 Footings and Foundations
Section 1805 — Footings and 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] 1805.1 Footings and Foundations General
Section 1805.1 — Footings and Foundations 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] 1805.1.1 Dampproofing and Waterproofing
Section 1805.1.1 — Dampproofing and 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] 1805.2 Depth of footings
Section 1805.2 — 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] 1805.3 Waterproofing Required
Section 1805.3 — Waterproofing Required. 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] 1805.4 Bearing walls
Section 1805.4 — Bearing 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] 1805.4.1 Prescriptive footings for light-frame construction
Section 1805.4.1 — Prescriptive footings for light-frame 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.
[F] 1805.5 Foundation walls
Section 1805.5 — 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] 1805.8 Dampproofing and waterproofing
Section 1805.8 — Dampproofing and 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] 1806.1 Presumptive Load-Bearing Capacity
Section 1806.1 — Presumptive Load-Bearing Capacity. 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] 1806.1.1 Presumptive Bearing Capacity
Section 1806.1.1 — Presumptive Bearing Capacity. 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] 1806.2 Presumptive Load-Bearing Values Table
Section 1806.2 — Presumptive Load-Bearing Values Table. 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] 1806.3 Lateral Sliding Resistance
Section 1806.3 — Lateral Sliding 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.
[F] 1807 Foundation Walls
Section 1807 — 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] 1807.1 Foundation Walls and Retaining Walls - General
Section 1807.1 — Foundation Walls and Retaining Walls - 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] 1807.1.1 Foundation Wall Design
Section 1807.1.1 — Foundation Wall Design. 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] 1807.1.2 Foundation Wall Thickness
Section 1807.1.2 — 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] 1807.1.3 Rubble Stone Foundation Walls
Section 1807.1.3 — 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] 1807.1.4 Permanent Wood Foundation Systems
Section 1807.1.4 — Permanent Wood Foundation Systems. 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] 1807.1.5 Foundation Plate or Sill
Section 1807.1.5 — Foundation Plate or Sill. 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] 1807.1.6 Foundation Wall Drainage
Section 1807.1.6 — 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] 1807.2 Retaining Walls
Section 1807.2 — 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] 1807.3 Foundation Dampproofing and Waterproofing
Section 1807.3 — Foundation Dampproofing and 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] 1808 Deep Foundations
Section 1808 — Deep 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] 1808.1 General - Foundations
Section 1808.1 — General - 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] 1808.1.1 Foundation Design Requirements
Section 1808.1.1 — Foundation Design 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] 1808.2 Design for Capacity of Foundations
Section 1808.2 — Design for Capacity of 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] 1808.3 Stepped Footings
Section 1808.3 — Stepped 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] 1808.4 Frost Protection
Section 1808.4 — 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] 1808.5 Frost Protection
Section 1808.5 — 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] 1808.6 Foundation on Expansive Soils
Section 1808.6 — Foundation on Expansive Soils. 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] 1808.7 Design for Expansive Soils
Section 1808.7 — Design for Expansive Soils. 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] 1808.8 Design for Seismic Overturning
Section 1808.8 — Design for Seismic Overturning. 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] 1808.8.1 Footing Design
Section 1808.8.1 — Footing 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.
[F] 1808.8.2 Concrete or Grout Strength and Dimensions
Section 1808.8.2 — Concrete or Grout Strength and Dimensions. 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] 1808.8.5 Stepped Footings
Section 1808.8.5 — Stepped 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] 1808.9 Seismic Requirements for Foundations
Section 1808.9 — Seismic Requirements for 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] 1809 Frost Protection
Section 1809 — 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] 1809.1 General - Shallow Foundations
Section 1809.1 — General - 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] 1809.1.1 Shallow Foundation Requirements
Section 1809.1.1 — Shallow 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] 1809.10 Plain Concrete Pedestals
Section 1809.10 — Plain Concrete Pedestals. 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] 1809.11 Timber Footings
Section 1809.11 — Timber 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] 1809.12 Timber Footings
Section 1809.12 — Timber 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] 1809.13 Slab-on-Ground Foundations
Section 1809.13 — Slab-on-Ground 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] 1809.2 Spread Footings
Section 1809.2 — Spread 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] 1809.3 Pile driving
Section 1809.3 — Pile driving. 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] 1809.4 Placement of Footings
Section 1809.4 — Placement 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] 1809.5 Combined Footings
Section 1809.5 — Combined 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] 1809.6 Mat Foundations
Section 1809.6 — Mat 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] 1809.7 Footings on or Adjacent to Slopes
Section 1809.7 — 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] 1809.8 Post-Tensioned Slabs-on-Ground
Section 1809.8 — Post-Tensioned Slabs-on-Ground. 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] 1809.9 Pier Foundations
Section 1809.9 — Pier 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] 1810.1 General - Deep Foundations
Section 1810.1 — General - Deep 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] 1810.1.1 Deep Foundation Requirements
Section 1810.1.1 — Deep 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] 1810.2 Micropile design
Section 1810.2 — Micropile 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.
[F] 1810.3 Design and Detailing
Section 1810.3 — Design and Detailing. 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] 1810.3.1 Minimum Depth - Deep Foundations
Section 1810.3.1 — Minimum Depth - Deep 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] 1810.3.11 Group Effects
Section 1810.3.11 — Group Effects. 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] 1810.3.2 Allowable Stresses
Section 1810.3.2 — Allowable Stresses. 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] 1810.3.3 Determination of Capacity
Section 1810.3.3 — Determination of Capacity. 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] 1810.3.4 Lateral Support
Section 1810.3.4 — Lateral 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.
[F] 1810.3.5 Group Action
Section 1810.3.5 — Group Action. 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] 1810.3.9 Lateral Support
Section 1810.3.9 — Lateral 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.
[F] 1810.4 Driven Piles
Section 1810.4 — Driven Piles. 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] 1811.1 Drilled Deep Foundations
Section 1811.1 — Drilled Deep 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] 1811.2 Concrete piles
Section 1811.2 — Concrete piles. 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] 1812.2 Steel piles
Section 1812.2 — Steel piles. 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] 1813.2 Timber piles
Section 1813.2 — Timber piles. 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] 1814.2 Caisson foundations
Section 1814.2 — Caisson 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.
Code sections are sourced from the International Code Council (ICC) and NFPA. Refer to ICC Digital Codes or NFPA for the authoritative source documents.