SLAB:
A slab is structural element whose thickness is small compared to
its own length and width.
Slabs in buildings are usually used to transmit the loads on floors and
roofs to the supporting beams.
TYPES OF
SLABS:
·
One-Way Slab
·
Two-Way Slab
·
Flat Plate
·
Flat slab
·
Grid or waffle slab
ONE WAY SLAB:
A one way slab is simply a very wide beam that spans between supports.
When Slab is supported on two opposite sides only,total load is carried
along the perpendicular direction of supporting beams.
When slab is Supported at all sides and length/Width>2 of a slab
panel,maximum load is carrying along the short direction.
Main reinforcement is Placed along the load carrying direction.
A One way slab is supported by parallel walls or beams ,and the main
tension reinforcing bars run parallel to the span .It looks like the following.
Example:
Generally all the Cantilever slabs are one Way slab. Chajjas and verandahs are
an practical example of one way slab.
TWO WAY SLAB:
Two way slab is a slab supported by beams on all the four sides and
the loads are
carried by the supports along both directions, it is known as two way slab. In
two way slab, 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.
Example: These types of slabs are used in constructing floors of multi
storeyed building.
Difference between
One Way Slab and Two way slab:
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One Way Slab
|
Two Way Slab
|
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Slabs are supported by the beams on
the two opposite sides
|
Slabs are supported by beams on all
the four sides.
|
|
Main reinforcement is provided on
shorter span due to bending
|
Main reinforcement is provided in
both sides due to bending occurs on both sides
|
|
Main Reinforcement is provided in
only direction for one way slabs
|
Main Reinforcement is provided
along both the directions in two way slabs.
|
|
Loads are carried along one
direction in one way slab.
|
Loads are carried along both the
directions in two way slabs.
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