**One Way Slab**

**One way slab** is supported by beams in only 2 sides. 2) The ratio of longer span panel (L) to shorter span panel (B) is equal. or greater than 2. Thus, L/B >= 2. 3) Main reinforcement is provided in only **one** direction for **one way slabs**.

**Two Way Slab**

**Two way slabs** are the **slabs** that are supported on four sides and the ratio of longer span (l) to shorter span (b) is less than 2. In **two way slabs**, load will be carried in both the directions. So, main reinforcement is provided in both direction for **two way slabs**.