Which type of reinforcement is called the main reinforcement in a one-way slab?

Explanation:

1. In a one-way slab, the main reinforcement is provided in the shorter span direction (the direction in which the slab bends the most).
2. This is because in a one-way slab, the bending occurs primarily along the shorter span, and the slab acts like a beam spanning in one direction.
3. Therefore, the bottom reinforcement is placed in the direction of the shorter span to resist the bending.

 Additional InformationOne-Way Slab:

1. Load Distribution: Loads are carried in one direction (along the shorter span).

2. Reinforcement: Main reinforcement is provided in the shorter span direction (bottom reinforcement).

3. Support: Supported by beams or walls on opposite sides, typically on all four edges.

4. Shape: Slab is longer in one direction, and the other direction is much shorter (like a rectangular slab).

5. Usage: Common in smaller structures, floors of residential buildings, and simple slabs with longer spans in one direction.

Two-Way Slab:

1. Load Distribution: Loads are carried in both directions (along both spans).

2. Reinforcement: Main reinforcement is provided in both directions, with bottom reinforcement generally in both the shorter and longer spans.

3. Support: Supported on all four edges, with the slab bending in both directions.

4. Shape: The length and width of the slab are relatively equal (square or nearly square).

5. Usage: Common in large structures, such as commercial buildings, parking garages, and large floor areas.