Flat Slab
uThe flat slab
is a reinforced concrete slab supported directly by concrete columns or caps.
Flat slab doesn’t have beams so it is also called as beam-less slab. They are
supported on columns itself. Loads are directly transferred to columns. In this
type of construction, a plain ceiling is obtained thus giving attractive
appearance from an architectural point of view. The plain ceiling diffuses the
light better and is considered less vulnerable in the case of fire than the
traditional beam slab construction. The flat slab is easier to construct and
requires less formwork. This is one of the types of concrete slabs.
uThe thickness
of the Flat slab is minimum 8″ or 0.2m.
Flat Slabs are used at:
uTo provide plain ceiling surface giving better
diffusion of light.
uEasy constructability with the economy in the formwork.
uLarger headroom or shorter story height & pleasing
appearance.
uThis kind of slabs are provided in parking.
uFlat slabs are
generally used in parking decks, commercial buildings, hotels or places where
beam projections are not desired.
Advantages of
Flat Slab:
uIt minimizes floor-to-floor heights when there is no
requirement for a deep false ceiling Building height can be reduced.
uAuto sprinkler is easier.
uLess construction time.
uIt increases the shear strength of the slab.
uReduce the moment in the slab by reducing the clear or
effective span.
Disadvantages of Flat slab:
uIn flat plate system, it is not possible to have large
span.
uNot suitable for supporting brittle (masonry)
partitions.
uHigher slab thickness.
There are four different types of concrete Flat Slabs:
uSlab without drop and column without column
head(capital).
uSlab with drop and column without column head.
uSlab without drop and column with column head.
uSlab with drop and column with column head.
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