"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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Required flexural steel at midspan and supports, temperature/shrinkage steel, deflection check (L/d ratio or rigorous calculation).

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Column dimensions, reinforcement ratio (ρg), number and size of bars, axial load (Pu), moments (Mux, Muy), unbraced length, end conditions.

"Two-Way Slab Design (Direct Design Method).xls" – follows ACI 318's DDM, including panel moment distribution. 4. Footing Design (Isolated Square or Rectangular) What it does: Sizes the footing based on soil bearing capacity, checks one-way and two-way (punching) shear, designs flexural reinforcement, and checks development length.

Interaction diagram points (nominal vs. design capacity), slenderness check, required tie spacing.

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