Downloaded "Isolated Footing Design.xls" from a civil engineering forum. Input wall load (65 kN/m), soil bearing (150 kPa), concrete C25/30, steel S420.
Service moment, reinforcement details, concrete cover, exposure class, age at loading. reinforced concrete design spreadsheet excel free download
Required footing thickness, reinforcement area and spacing, bearing check at column-footing interface. Downloaded "Isolated Footing Design
Spreadsheet suggested 0.3 m thickness (instead of assumed 0.25 m) to satisfy punching shear. Also showed that minimum steel (0.0018bh) governed over required flexural steel. Engineer saved a potential failure at a negligible cost. The spreadsheet’s calculation sheet was printed, signed, and included in the construction permit. Engineer saved a potential failure at a negligible cost
"Biaxial Column Interaction Diagram.xls" – a classic spreadsheet that solves strain compatibility for any section. 3. Slab Design (One-Way and Two-Way) What it does: Calculates required reinforcement for continuous or simply supported slabs, checks deflection limits, and designs edge or corner reinforcement.
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Slab thickness, span lengths, live and dead loads, concrete and steel properties, support conditions.