Answer / m. ghailani

1-In two way slab, the slab is supported by beams, the load
of both slab and beams is conveyed to columns and footings.
Flat slab, or more accurately flat plate the slab is
supported by columns, no beams to be used.
2-In two way slab,shear is critical in beams and considered
in slab.
In flat slab, the shear is very critical at the area of
connection of slab with column (called punching shear).
here the column due to load is trying to punch through the
slab and we need the slab to be thickened ( by using Caps)
and/ or heavily reinforced to resist this shear.
3-In two way slab, due to (drop) beams, some of the floor
height is lost (we need more height for different piping
installations.
In flat slab, we don't have this problem because we don't
have drop beams.

Answer / yaswanth kumar

the difference between two way slabs and flat slabs are
load tranfer and resting of slabs.

In two way slabs the slabs are resting on T-Beams and the
slab load transfer to the beams and then in to the columns.

Flat slabs means A concrete slab which is reinforced in two
or more directions, usually without beams or girders to
transfer the loads to supporting members.

Answer / sam

2 way slab are placed on beams.in 2way slab load is
tranfered to beam 1st then to the columns.its more rigid.may
be its depth small.
in flat slab the beam is placed on only columns.deflection
be more.load is directly transferred 2 the columns

Answer / suraj

1-In two way slab, the slab is supported by beams, the load
of both slab and beams is conveyed to columns and footings.
Flat slab, or more accurately flat plate the slab is
supported by columns, no beams to be used.
2-In two way slab,shear is critical in beams and considered
in slab.

Answer / sudhir patel

In two way slab, the slab is supported by beams, the load
of both slab and beams is conveyed to columns and footings.
Flat slab, or more accurately flat plate the slab is
supported by columns, no beams to be used.
In flat slab, the shear is very critical at the area of
connection of slab with column (called punching shear).
here the column due to load is trying to punch through the
slab and we need the slab to be thickened ( by using Caps)
and/ or heavily reinforced to resist this shear.

Answer / neelam saroj

if Ly/Lx < 2 then the slab is Two Way.
and if Ly/Lx > 2 then the slab is One way.
Ly is Longer Span of slab
Lx is shorter span of Slab.

Flat slab is different then the above.
In which beams are not designed and the in casting of slab
is prestressed or Column cap are used.
Advantage =it will give a clear height (without beam) and
good architectural apperance.

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