Analysis and Design of Slabs

Analysis and Design of Slabs

Slabs are structural elements with a small thickness relative to their other dimensions. They carry loads primarily by flexure.

One-Way Slabs

A slab is considered one-way if the ratio of the longer span to the shorter span is greater than 2 ($L/S > 2$), or if supported on only two opposite edges. Design is similar to a 1-meter wide rectangular beam.

Two-Way Slabs

Two-way slabs are supported on all four sides with $L/S \leq 2$. Loads are transferred to supports in two orthogonal directions. Methods of analysis include:

1. Direct Design Method (DDM)
2. Equivalent Frame Method (EFM)
3. Coefficient Method (NSCP/ACI simplified tables)

---

Solved Problems