> ## Documentation Index
> Fetch the complete documentation index at: https://calcs.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Foundations and Retaining Walls

> Footing, slab-on-grade and retaining wall calculators for the United States.

### Footings

<CardGroup cols={3}>
  <Card title="Design a Spread Footing (IBC 2024)" icon="pencil" href="/docs/calculators/us/foundations-and-retaining-walls/foundationsSpreadFootingUSAIBC2024">
    Design isolated spread footings to ACI 318-19 per IBC 2024 (ASCE 7-22): bearing, flexure, one-way and punching shear, and development length.
  </Card>

  <Card title="Design a Combined Footing to ACI 318-19" icon="layer-group" href="/docs/calculators/us/foundations-and-retaining-walls/foundationsCombinedFootingUSAIBC2024">
    Design combined rectangular footings for two columns to ACI 318-19 per IBC 2024: bearing, overturning, sliding, flexure, shear and development length.
  </Card>

  <Card title="Design a Wall Footing to ACI 318-19" icon="pencil" href="/docs/calculators/us/foundations-and-retaining-walls/foundationsWallFootingUSAACI318-19">
    Design continuous wall footings to ACI 318-19 per IBC 2021 or IBC 2024. Results cover ultimate load, bearing capacity and serviceability.
  </Card>

  <Card title="Design a Pier Footing (IBC 2024)" icon="pencil" href="/docs/calculators/us/foundations-and-retaining-walls/foundationsPierFootingUSAIBC2024">
    Design pier, pole and deck-post footings to ACI 318-19 per IBC 2024 (ASCE 7-22): embedment, bearing, bending, shear and uplift.
  </Card>

  <Card title="Check a Point Load on a Slab on Grade" icon="calculator" href="/docs/calculators/us/foundations-and-retaining-walls/concreteSlabOnGradeACI318-19">
    Check point load capacity on concrete slabs on grade using the Azzi-Laird and Shentu-Jiang-Hsu methods with ACI 318-19 material properties.
  </Card>
</CardGroup>

#### Guides and Examples

<CardGroup cols={3}>
  <Card title="Understand Gross vs Net Soil Bearing Pressure in Spread Footing Design" icon="book" href="/docs/calculators/us/foundations-and-retaining-walls/gross-vs-net-soil-bearing-pressure">
    How Calcs.com calculates gross and net soil bearing pressure, what the difference is, and how to input geotechnical values correctly.
  </Card>

  <Card title="Development Length in Footings" icon="pyramid" href="/docs/calculators/us/foundations-and-retaining-walls/development-length-footings">
    Fix footings that fail development length checks: switch to plain concrete, adjust thickness, or develop the rebar.
  </Card>

  <Card title="Spread Footing to ACI 318-14 - Validation Examples" icon="pyramid" href="/docs/calculators/us/foundations-and-retaining-walls/spread-footing-validation-examples">
    Validation and design examples for concrete spread footings to ACI 318-14.
  </Card>
</CardGroup>

### Retaining Walls

<CardGroup cols={3}>
  <Card title="Design a Cantilever Retaining Wall (IBC 2024)" icon="map" href="/docs/calculators/us/foundations-and-retaining-walls/retainingWallCantileverUSAIBC2024">
    Design concrete or CMU cantilever retaining walls to IBC 2024, ASCE 7-22, ACI 318-19 and TMS 402-22, with shear key design and seismic loads.
  </Card>

  <Card title="Design a Restrained (Basement) Retaining Wall (IBC 2024)" icon="map" href="/docs/calculators/us/foundations-and-retaining-walls/retainingWallRestrainedUSAIBC2024">
    Design restrained (basement) retaining walls to IBC 2024, ASCE 7-22 and ACI 318-19, with at-rest or active soil pressure and an optional shear key.
  </Card>
</CardGroup>

#### Guides and Examples

<CardGroup cols={3}>
  <Card title="CMU Cantilever Retaining Wall Worked Example" icon="map" href="/docs/calculators/us/foundations-and-retaining-walls/cmu-cantilever-retaining-wall-worked-example">
    Worked example: a reinforced CMU cantilever wall retaining 9 ft of earth, checked for bending and shear in the Cantilever Retaining Wall (IBC 2024) calculator.
  </Card>

  <Card title="Active Pressure on Shear Keys in Retaining Walls" icon="stack-2" href="/docs/calculators/us/foundations-and-retaining-walls/retaining-wall-shear-keys">
    Why a shear key can reduce the sliding factor of safety in the Cantilever Retaining Wall (IBC 2024) calculator: active pressure on the key.
  </Card>
</CardGroup>

### Older Code Editions

<CardGroup cols={3}>
  <Card title="Design a Spread Footing (IBC 2021)" icon="calculator" href="/docs/calculators/us/foundations-and-retaining-walls/foundationsSpreadFootingUSAACI318-19">
    Design isolated spread footings to ACI 318-19 per IBC 2021 (ASCE 7-16). An earlier code edition, kept for existing projects.
  </Card>

  <Card title="Design a Spread Footing to ACI 318-14" icon="calculator" href="/docs/calculators/us/foundations-and-retaining-walls/foundationsSpreadFootingUSA">
    Design isolated spread footings to ACI 318-14. An earlier code edition, kept for existing projects.
  </Card>

  <Card title="Design a Wall Footing to ACI 318-14" icon="calculator" href="/docs/calculators/us/foundations-and-retaining-walls/foundationsWallFootingUSA">
    Design continuous wall footings to ACI 318-14. An earlier code edition, kept for existing projects.
  </Card>

  <Card title="Design a Pier Footing to ACI 318-14" icon="calculator" href="/docs/calculators/us/foundations-and-retaining-walls/foundationsPierFootingUSA">
    Design pier and deck footings to ACI 318-14 (IBC 2018). An earlier code edition, kept for existing projects.
  </Card>

  <Card title="Design a Pole Footing (IBC 2021)" icon="calculator" href="/docs/calculators/us/foundations-and-retaining-walls/foundationsPierFootingUSAACI318-19">
    Design pier and pole footings to ACI 318-19 per IBC 2021 (ASCE 7-16). An earlier code edition, kept for existing projects.
  </Card>

  <Card title="Design a Cantilever Retaining Wall (IBC 2021)" icon="calculator" href="/docs/calculators/us/foundations-and-retaining-walls/retainingWallCantileverUSAACI318-19">
    Design concrete or CMU cantilever retaining walls to IBC 2021, ASCE 7-16, ACI 318-19 and TMS 402-16. An earlier edition, kept for existing projects.
  </Card>

  <Card title="Design a Cantilever Retaining Wall to ACI 318-14" icon="calculator" href="/docs/calculators/us/foundations-and-retaining-walls/retainingWallCantileverUSA">
    Design cantilever retaining walls to ACI 318-14 and IBC 2018. An earlier code edition, kept for existing projects.
  </Card>

  <Card title="Design a Restrained (Basement) Retaining Wall (IBC 2021)" icon="calculator" href="/docs/calculators/us/foundations-and-retaining-walls/retainingWallRestrainedUSA">
    Design restrained (basement) retaining walls to IBC 2021, ASCE 7-16 and ACI 318-19. An earlier code edition, kept for existing projects.
  </Card>
</CardGroup>