Footings
Design a Spread Footing (IBC 2024)
Design isolated spread footings to ACI 318-19 per IBC 2024 (ASCE 7-22): bearing, flexure, one-way and punching shear, and development length.
Design a Combined Footing to ACI 318-19
Design combined rectangular footings for two columns to ACI 318-19 per IBC 2024: bearing, overturning, sliding, flexure, shear and development length.
Design a Wall Footing to ACI 318-19
Design continuous wall footings to ACI 318-19 per IBC 2021 or IBC 2024. Results cover ultimate load, bearing capacity and serviceability.
Design a Pier Footing (IBC 2024)
Design pier, pole and deck-post footings to ACI 318-19 per IBC 2024 (ASCE 7-22): embedment, bearing, bending, shear and uplift.
Check a Point Load on a Slab on Grade
Check point load capacity on concrete slabs on grade using the Azzi-Laird and Shentu-Jiang-Hsu methods with ACI 318-19 material properties.
Guides and Examples
Understand Gross vs Net Soil Bearing Pressure for Footings
Gross vs net soil bearing pressure in the Calcs.com Spread Footing calculator (IBC 2024, ACI 318-19): how each is calculated and how to enter allowable values.
Development Length in Footings
Fix footings that fail development length checks: switch to plain concrete, adjust thickness, or develop the rebar.
Spread Footing to ACI 318-14 - Validation Examples
Validation and design examples for concrete spread footings to ACI 318-14.
Retaining Walls
Design a Cantilever Retaining Wall (IBC 2024)
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.
Design a Restrained (Basement) Retaining Wall (IBC 2024)
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.
Guides and Examples
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.
Active Pressure on Shear Keys in Retaining Walls (IBC 2024)
Why a shear key can lower or barely change the sliding factor of safety in the Cantilever Retaining Wall (IBC 2024) calculator, with a worked example.
Older Code Editions
Design a Spread Footing (IBC 2021)
Design isolated spread footings to ACI 318-19 per IBC 2021 (ASCE 7-16). An earlier code edition, kept for existing projects.
Design a Spread Footing to ACI 318-14
Design isolated spread footings to ACI 318-14. An earlier code edition, kept for existing projects.
Design a Wall Footing to ACI 318-14
Design continuous wall footings to ACI 318-14. An earlier code edition, kept for existing projects.
Design a Pier Footing to ACI 318-14
Design pier and deck footings to ACI 318-14 (IBC 2018). An earlier code edition, kept for existing projects.
Design a Pole Footing (IBC 2021)
Design pier and pole footings to ACI 318-19 per IBC 2021 (ASCE 7-16). An earlier code edition, kept for existing projects.
Design a Cantilever Retaining Wall (IBC 2021)
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.
Design a Cantilever Retaining Wall to ACI 318-14
Design cantilever retaining walls to ACI 318-14 and IBC 2018. An earlier code edition, kept for existing projects.
Design a Restrained (Basement) Retaining Wall (IBC 2021)
Design restrained (basement) retaining walls to IBC 2021, ASCE 7-16 and ACI 318-19. An earlier code edition, kept for existing projects.