Why do we provide reinforcement in 2 directions in one way slab?

In two way slab, the ratio of longer span (l) to shorter span (b) is less than 2. So, the main reinforcement is provided in both directions for two way slabs. Example: These types of slabs are used in constructing floors of a multi-storeyed building.

How reinforcement is provided in two way slab?

In two way slab, as the loads are carried in both directions (longer and shorter direction) main reinforcement bars are provided in both directions. The loads are carried by two sides are equal. Slab with reinforcement in both directions is more economical than one way reinforcement slabs.

Why do we need to provide additional reinforcements perpendicular to the main reinforcements in one way slabs?

To provide adequate support on the larger side, the main reinforcement bar is provided perpendicular to that side or parallel to the shorter direction. Distribution bars are provided in the longer direction, which won’t help in carrying any load (refer to below image). So it is a one way slab.

What is meant by one way slab?

The one-way slab is a slab, which is supported by parallel walls or beams, and whose length to breadth ratio is equal to or greater than two and it bends in only one direction (spanning direction) while it is transferring the loads to the two supporting walls or beams, because of its geometry.

In which direction the main reinforcement will be in one way slab?

shorter direction
As we all knows that main reinforcement in one way slab will be along shorter direction and in two way slab main reinforcement will be along both direction.

Why cranks are provided in slab?

Cranked bars / Bent up bars are provided on top of the reinforcement to resist negative bending moment/Hogging at the supports of the slab. To resist the shear force at the supports. To reduce the risk of a brittle failure of slab-column connection.

What is the difference between singly and doubly reinforced beam?

A Singly reinforced beam holds a steel bar in the tension zone, but in doubly reinforced beams, steel bars are given in both zones, tension, and compression. While in the doubly reinforced beam, compression steel resists compressive stresses and constitutes the addition moment of resistance.

What is a singly reinforced beam?

The beam that is longitudinally reinforced only in tension zone, it is known as singly reinforced beam. In Such beams, the ultimate bending moment and the tension due to bending are carried by the reinforcement, while the compression is carried by the concrete.

How do you find singly or doubly reinforced beam?

Difference Between Single and Doubly Reinforced Beam In a beam, if the reinforcement is only in the stress zone, it will be called the Singly Reinforcement Beam, and if the reinforcement is in the Tension and Compression zone, it will be called the Doubly Reinforced Beam.

What is crank in slab?