Applied Mechanical Department

Applied Mechanical Department

Govt. Poly. Valsad

Design Of Concrete Structures (Civil Vth Sem)

Design Examples

1)

An RCC column carries a
characteristic load of 1600 KN. The allowable bearing pressure on soil is
180KN/m
2
. Design the column and design an
isolated foo
ting for the same column. The
materials are m
20

grade concrete and HYSD reinforcement of grade Fe
415

for both, the column
and the footing.


Type Of Footing

Type Of Column

Batch 1

Isolated Pad F
ooting

Square C
olumn

Batch 2

Isolated Slopped Fo
oting

Square C
olumn


2)

S/S One way Slab
.

A simply supported one way slab of a corridor of an office building of a clear span 2
.
4m is
supported on beam of 230mm
width. Design the slab for a liv
e load of 5kn/m
2

. The materials
are M
20

grade concrete an
d

HYSD reinforcement of grade Fe
415
. Draw detailed sketch + all the
checks are required.


3)

Two Way slab with corners not held down.

A drawing room of resident
ial bu
ilding measures 4.3m X 6.55m. I
t is supported on 350mm thick
walls on all four sides. The

slab is simply supported at ed
ges with no provision to resist
t
orsi
o
n at
corners.

Design
the

slab using grade M
20
concrete and HYSD reinforcement of grade Fe
415.
Show
all the checks and draw detailed sketch.


4)

Two Way slab with corners held down.

Design th
e slab for the principal’s office of college building 3.6m
X 4.8m
. The slab is resting on
4010mm thick wall and ends are prevented from lifting the slab. Live load is 3kn/m
2
. Use
M
20

concrete mix and Fe
415

steel.


5)

One way Continuous Slab.

Design a
one
-
way

continuous slab for a
office building
for three equal span of 3.2m from the
following data.

i.

Live load = 4Kn/m
2

ii.

Floor Finish = 1Kn/m
2

iii.

Concrete M
20
,

Steel Fe
415.


6)

Sketch the reinforcement.

Details across a typical cross
-
section of a waist slab along
with the landing slab

of a single fight
star.
Simply
supported at both ends from following data.

i.

Rise 150mm and Trade 250mm

ii.

Waist slab 140mm thick

iii.

Main reinforcement 12mm diameter at 150mm C/C

iv.

Distribution steel 8mm diameter at 200mm C/C

v.

Going 2.5m and
landing 1m

vi.

Assume all other required data
.