Difference Between The One Way And Two Way Slab || Slab BBS

Introduction
As you probably know, one of the most important structural elements in buildings are slabs. They are typically horizontal and flat surfaces made of concrete or other materials. When it comes to concrete slabs, steel-reinforced slabs are used more often for ceilings and floors. The thickness of a concrete slab is usually around 100-500mm. Some builders also use thin slabs for exterior paving. For the construction of ground floors and foundations, thick concrete slabs are typically used.
Structurally speaking, slabs can be categorized in two types, which we will focus on in this article. Let’s have a look at them and identify differences among them.
One-Way Slab
The one-way slab has reinforcements which help resisting bending moments from bending along the slab’s long direction. One-way slabs deforms under load into a cylindrical surfaces. The direction that is normal to support on opposite sides of the rectangle is the structural action present in the one-way slab. The designs of the one-way slab include ribbed slabs and corrugated slabs.
In case of one-way slab, if we increase the beams width to depth ratio, and increase the percentage of steel, perpendicular to the direction of bending, then one-way slab will be more economical and will be stronger than two way slab. When we apply the load, a one-way slab bends into a surface that is in the shape of a disc rather than cylindrical.
It means that if at a point, the slab is curved in both of the principal directions, the curvature is proportional to bending moments which also exist in both of the directions. This is a distinguishing factor related to the one-way slab which makes it different from the two-way slab. In further discussion, the focus will be on the two-way slab and its distinguishing features.
Two-way Slab
This type of slab has a reinforcement that resists moments in both directions. One of the most important aspects of two-way slabs is the ratio between two horizontal spans. If ly:lx LESS THAN 2, where lx is shorter dimension and ly is longer slabs dimension, then it is considered as a two-way slab. Moments from both of the directions are important for design development. So, it is quite evident from the above discussion that if the axial ratio is more than 2, it requires a two-way slab.
To resist the moments, the slab is reinforced in each of the two directions. Usually, two bars layers are used perpendicularly to reinforce the slab. The slab must be designed for taking a proportionate amount of load in every direction.
Different types of reinforced concrete are important in the two-way slab that include:
Slabs supported by beams or walls from all sides,
Those which get support directly over columns are the flat plates.
Such slab which is without the beam, but gets support from the drop panel, is the flat slab.
Some of the choices in two-way slabs is cut-off, such as straight bars and bent bars. On industrial scale, bar fabrication favors the straight bars because its manufacturing is economic. It is important that the reinforcement spacing should not exceed 2 times the thickness of slab, because it will result in occurrence of flexural cracks.
One Way Slab & Two Way Slab
Difference Between The One Way And Two Way Slab || Slab BBS
#oneway #twoway #slab
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CIVIL ENGINEER
AVINASH SHARMA
POSITIVE BUILDER
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[@statusguru882]

1000 sq me tow way krana he to steel kitna zada lagega one way se

[@positivebuilder]

100 - 150 kg bus

[@nitishkumar-lz2zr]

Sir, one way slab me crank bar L/4 distance pe hi provide hoga kya. Or crank bar ka jo distance mapna hai bo beam ka ending point se mapte hai kya

[@positivebuilder]

As per structural drawing pe jo mention ho waise provide krna hai agar structure ki drawing Nhi banwayi h to l/4 distance pe crank provide kr de

[@nitishkumar-lz2zr]

Sir, but L/4 ham kaha se mape beam 6or kar ya pura beam measurement karna hai

[@nitishkumar-lz2zr]

Sir, can you whatsApp [phone]