Step-by-step design of an isolated (pad) footing — calculation example, assumptions, formulas, and checks
A beginner-friendly, calculation-focused tutorial that walks you through sizing and checking a square isolated (pad) footing for a column load. Includes assumptions, units, formulas, a worked numerical demonstration, flexural and shear checks (one-way and punching), reinforcement sizing, and reasonableness checks with references to ACI/FHWA/USACE guidance.