A one-way slab is a type of reinforced concrete slab that is supported by beams on two opposite sides and transmits the load to the supporting beams in one direction only. The reinforcement in the slab is placed parallel to the supporting beams in order to resist the bending moment in one direction only.
A two-way slab is a type of reinforced concrete slab that is supported by beams on all four sides and transmits the load to the supporting beams in two perpendicular directions. The reinforcement in the slab is placed in both directions to resist the bending moment and shear forces in both directions.
The main difference between the two types of slabs is the direction of the load transmission and the direction of the reinforcement. One-way slabs are generally used for longer spans and can carry heavier loads, while two-way slabs are used for shorter spans or smaller areas and are typically more economical.
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