In which direction do we provide the main reinforcement for a one way slab supported on all four sides longer or shorter )?
One Way Slab Reinforcement Details: To provide adequate support to the longer side, the main reinforcement bars are provided parallelly to the shorter side and the distribution bars are provided on the longer side which won’t help in carrying the load.
Why do we provide minimum reinforcement?
A minimum area of reinforcement is required to control the cracking, which occurs in the concrete due to temperature, shrinkage and creep. It enables cracking to be uniformly distributed and therefore minimizes individual crack width.
What is the purpose of providing minimum amount of flexural steel in beam?
In the design of reinforced rectangular concrete beam structure, the minimum amount of flexural reinforcement is required to avoid brittle failure.
In which direction main steel is placed in a two way simply supported slab?
The two-way slab is supported by the beam on all four sides. In a one-way slab, the load is carried in one direction perpendicular to the supporting beam. In a two-way slab, the load is carried in both directions.
Why temperature and shrinkage reinforcement is used in one way slab?
Temperature and Shrinkage Reinforcement Shrinkage and temperature reinforcements are provided to resist shrinkage and temperature stresses in concrete. Slabs are joined rigidly to other parts of the structure and cannot contract freely, this results in tension stresses known as shrinkage stresses.
What is the reinforcement in two way slab?
In two way slab main reinforcement is provided along both direction. Slabs could be simply supported, continuous or cantilever. In two way slab the corners may be held down by restraints or may be allowed to lift up. Additional torsion reinforcement is required at corners when it is restrained against uplifting as shown in Fig.1.
What is the difference between one way slab and two way slab?
In one way slab main reinforcement is parallel to shorter direction and the reinforcement parallel to longer direction is called distribution steel. In two way slab main reinforcement is provided along both direction. Slabs could be simply supported, continuous or cantilever. In two way slab the corners may be held down by restraints
When is torsion reinforcement required at corners of slab?
Additional torsion reinforcement is required at corners when it is restrained against uplifting as shown in Fig.1. Thickness of the slab is decided based on span to depth ratio specified in IS456-2000.
What is the re-reinforcement detailing of isolated footings?
Reinforcement detailing of isolated footing include:- 1- The concrete cover of Reinforcements According to IS 456-200, the minimum thickness to main reinforcement in footing should not be less than 50 mm if the footing is in contact with the earth surface directly, and 40 mm for the external exposed face such as surface leveling PCC.