Continuous Footing

Wall / strip footing — soil bearing, one-way shear, flexure (ACI 318).

Enter service (unfactored) loads — the tool applies the 1.2D + 1.6L strength combination internally. Allowable soil bearing q_allow is a geotechnical (service-level) input from the soils report.

Design diagram — updates live with your inputs

Wall & Loads

Wall dead load (plf) Service

Wall live load (plf) Service

Wall thickness (in)

Footing & Soil

Allowable soil bearing (psf)

Footing width B (ft)

Footing thickness h (in)

Concrete & Reinforcement

Concrete f'c (psi)

Reinforcement fy (psi)

Transverse bar

Bar spacing (in) On center

Clear cover (in)

ACI 318-19 / IBC 2021

Validation, assumptions & limitations Download validation report (PDF) ↗

This calculator is verified by 4 independent tests comparing its output against closed-form statics, NDS/SDPWS design-standard values and published worked examples. Full case-by-case results are in the PDF report.

Assumptions

Continuous wall footing; one-way action (no punching).
Designed per 12-in strip of wall length; uniform soil pressure.
Strength loads for concrete; service loads for soil bearing.

Limitations

Allowable soil bearing is a geotechnical input — confirm with soils report.
Concentric wall load; no overturning/eccentricity.

Results are for preliminary design and must be confirmed by a licensed engineer against the current adopted code and project-specific conditions.