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Difference between One Way Slab and Two Way Slab

Difference between One Way Slab and Two Way Slab

The one way and two way slab systems are the most commonly used floor system in the reinforced concrete structure. These slabs are constructed to provide flat surfaces, usually horizontal, in building floors, roofs or other types of structures. These two slab system has some basic differences. The main differences between one way slab system and two way slab system are given below.

Difference between One Way Slab and Two Way Slab - Simple Explanation
12 Difference Between One-Way And Two-Way Slab (With Comparison Chart) - Viva Differences
 One Way SlabTwo Way Slab
1In one way slab, the ratio of longer span panel (L) to shorter span panel (B) is equal or greater than 2. Thus, L/B ≥ 2In two way slab, the ratio of longer span panel (L) to shorter span panel (B) is less than 2. Thus, L/B < 2.
2Slab panel is supported on two opposite sides in short direction of one-way slabSlab panel is supported on four sides of two-way slab.
3One way slab bends or deflect in a direction perpendicular to the supporting edgesTwo way slab bend or deflect in both directions.
4Deflected shape of one way slab is cylindrical.Deflected shape of two way slab is dish-shaped.
5one way slab has structural strength in shortest directionTwo way slab has structural strength in both direction
6Main reinforcement is provided in only one direction for one way slabs.Main reinforcement is provided in both the direction for two way slabs.

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