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How is two way slab design?
A two-way slab is supported on all its four sides by beams. The supports carry the loads along both directions of the slab, therefore it is called a two-way slab. The two-way slabs distribute the loads in both directions. Hence, the reinforcement is provided along shorter and longer sides of the slabs.
How do I make a two way concrete slab?
Procedures of Two Way Slab Design by Direct Design Method
- Determine slab type and layout.
- Choose slab thickness that should be adequate for avoiding excessive deflections and satisfy shear at the interior and exterior columns.
- Choose design method (direct design method in this case)
How do you design a slab?
The effective depth d of two way slabs can also be assumed using cl. 24.1,IS 456 provided short span is <3.5m and loading class is <3.5KN/m….Or, the following thumb rules can be used:
- One way slab d=(L/22) to (L/28).
- Two way simply supported slab d=(L/20) to (L/30)
- Two way restrained slab d=(L/30) to (L/32)
How can we make one way slab and two way slab?
In two-way slab, the crank is provided in four directions. If L/b the ratio is greater than or equal 2 or then it is considered a one-way slab. If L/b the ratio is less than 2 then it is considered a two-way slab. In one-way slab, the load is carried in one direction perpendicular to the supporting beam.
How do you design a slab thickness?
Standards like ACI 318 have specified the minimum thickness of the slab based on the span of the slab.
- Simply Supported Slab = Span / 20.
- One End Continuous Slab = Span / 24.
- Both End Continuous Slab = Span / 28.
- Cantiliver = Span / 10.
What is two way slab and where we can design for two way slab?
Difference Between One Way Slab And Two Way Slab:
| One Way Slab | Two Way Slab |
|---|---|
| The slabs are supported by the beams on the two opposite sides. | The slabs are supported on all the four sides. |
| The loads are carried along one direction. | The loads are carried along with both directions. |
How do you make a one way spanning slab?
One-Way Continuous Solid Slab Design
- Find Minimum effect depth [d] Minimum Effective depth (dmin) = span/ (basic span /depth) x M.F
- Find Nominal Cover.
- Calculate the height of the slab (h)
- Calculate the loading and Design load.
- Calculate the Moment for each panel of the slab, then design it.
What is a two way spanning slab?
Two way slab is a slab supported by beams on all the four sides and the loads are carried by the supports along with both directions, it is known as two way slab. In two way slabs, the load will be carried in both the directions. So, the main reinforcement is provided in both directions for two way slabs.
What are the steps to design a slab?
Steps to design a two way slab Determine the effective span of the slab – dimension (l x X l y) Assume an effective depth (d) on the basis of span to effective depth Analysis – Calculate the moment Consider the various loads due to Self weight Dead Load Live load Calculate the total load and factored load (1.5 * Total Determine the area of reinforcement ( Ast )
Where are one way and two way slabs used?
In two-way slab, the load is carried in both directions. The deflected shape of the one-way slab is cylindrical. Whereas the deflected shape of the two-way slab is a dish or saucer-like shape. Whereas two-way slabs are used in constructive floors of the Multistorey building .
What is one way and two way slab?
Two Way Slab. Two way slabs are the slabs that are supported on four sides and the ratio of longer span (l) to shorter span (b) is less than 2. In two way slabs, load will be carried in both the directions. So, main reinforcement is provided in both direction for two way slabs.
What is reinforcement in two way slab?
In two-way slab, the main reinforcement is provided in both directions. In one-way slab, the crank is provided in two directions. In two-way slab, the crank is provided in four directions. The one-way slab is supported by a beam on two opposite side only.
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