Design Software
Mat (Raft) Foundation — Conventional Rigid Method
Rectangular mat foundations supporting N columns per ACI 318-25 §13.3.4 and Wight & MacGregor 7e §15-7. Conventional rigid-method analysis: bilinear soil pressure from total load and eccentricity of the column resultant; per-column two-way (punching) shear at d/2 with auto-detected αs (interior/edge/corner). For rigorous plate-on-Winkler-foundation analysis with subgrade reaction (ks), export geometry to a dedicated finite-element foundation solver.
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Mat FAILS — 3 issue(s)qnu = 94.4 kPa · resultant offset (eX, eY) = (0, 0) mm
Mat geometry (mm)
Soil
Materials (MPa)
Columns (4)
| ID | Shape | cx (mm) | cy (mm) | x (mm) | y (mm) | PD (kN) | PL (kN) | Loc (αs) | |
|---|---|---|---|---|---|---|---|---|---|
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Warnings
- Strip-method flexure (X) fails — increase mat reinforcement in X.
- Strip-method flexure (Y) fails — increase mat reinforcement in Y.
- Per ACI 318-25 R13.3.4.4: continuous top + bottom reinforcement in BOTH directions is recommended for crack control and to intercept punching cracks.