Foundation Design Calculator

Design spread footings with punching shear and bearing capacity checks

ACI 318-19DPT 1008-61Punching / Bearing / Development

Calculation results are decision-support tools. The design engineer must review and verify all results independently.

Unit System

Service (unfactored) loads used for bearing and settlement checks.

Axial load (kN) Pₛ

Moment X (kN·m) Mₛₓ

Moment Y (kN·m) Mₛᵧ

Shear X (kN)

Shear Y (kN)

Load components (D/L/W/E) — enables project load-combo envelopes

Service-level actions. Complete every row you start; leave an optional row blank when that category does not exist.

Use factored values (e.g. 1.2D+1.6L) in kN / kN·m; compare with expected column/building load

Axial load (kN) Pᵤ

Moment X (kN·m) Mᵤₓ

Moment Y (kN·m) Mᵤᵧ

Bearing capacity: net value (kN/m²) after deducting overburden; 150–300 kN/m² typical for compacted soil

Net allowable bearing capacity (kN/m²)

Footing depth (m)

Type

Isolated

Column width (mm)

Column depth (mm)

Concrete

Steel

Fill in the form on the left and click Calculate to see results