Which property distinguishes a one-way slab from a two-way slab?

• A. Thickness
• B. Load direction
• C. Type of reinforcement used
• D. Material composition

Answer: (B)

The distinguishing property that sets a one-way slab apart from a two-way slab is the load direction. In structural design, a one-way slab primarily supports and transmits loads in one direction. This means that it is designed to span between two supports, typically with supports on opposite sides, which allows it to carry loads predominantly in that one direction.

On the other hand, a two-way slab is supported on all four sides and can distribute loads in two directions, allowing it to behave more like a plate rather than a beam. Two-way slabs are commonly used in situations where the loading occurs from various points and requires more equal support across the entire surface.

Thicker slabs can be found in both one-way and two-way designs, as thickness is more dependent on load requirements and design specifications rather than slab type. The type of reinforcement used can also vary between one-way and two-way slabs; however, it is the load direction that fundamentally characterizes the difference. Lastly, material composition does not differentiate these slabs; both can be made of similar materials like concrete or composites.