ACI 318-19
RC Two-Way Slab Design Calculator (ACI 318-19)
AutoDesign’s two-way slab tool designs reinforced-concrete two-way slabs to ACI 318-19 by the Direct Design Method — flat plate on columns or with edge beams — covering strip flexure in both directions, punching (two-way) and one-way shear, and deflection control.
What this calculator does
- ✓Design RC two-way slabs to ACI 318-19 by the Direct Design Method
- ✓Flat-plate (on columns) or edge-beam configurations
- ✓Column-strip and middle-strip flexure in both directions
- ✓Punching (two-way) and one-way shear checks
- ✓Shrinkage & temperature steel and minimum-thickness deflection control
Frequently asked questions
What design method is used? +
The Direct Design Method (DDM) of ACI 318-19, distributing total static moment to column and middle strips in each direction.
Does it check punching shear? +
Yes — two-way (punching) shear around columns and one-way shear are both checked.
Is this tool available now? +
Yes — the two-way slab calculator is live. Enter your panel geometry, materials and factored load to design the column and middle strips by the Direct Design Method and run the punching- and one-way-shear checks.
Ready to run a design?
Open the RC Two-Way Slab Design Calculator (ACI 318-19) in your browser — no install required.
Launch calculator