In: Civil Engineering

**The detail of column and pad footing are as under:
[5]**

** **
_{ } Size of column:
300 mm x 300 mm.

**Live load on column: 900
kN.**

** **

**Dead load on column: 1200
kN.**

** **

**Soil Bearing Pressure: 180
kN/m² and Depth of footing as 400 mm**

** **

**Nominal cover: 50 mm and 20 mm
diameter bars for reinforcement**

**Design the footing for bending.**_{ }**Check the footing in two way shear.**

**iii.** **Write the reasons for considering the
service loads for dimensioning of the footing** **and
factored loads for calculating the factored soil
pressure.**

**Consider f**_{cu}=40 N/mm^{2}, f_{y}=460 N/mm^{2}, severe exposure condition and 2 hours of fire resistance for all the questions.**Use B.S 8110 for all your calculations and references.****Draw the structural detailing after designing each member for all the questions.****Unit weight of concrete as 25 kN/m**^{3}

Design for britishcode 8110
Design a square pad footing for a 300 mm square column
supporting a factored axial load of 800 kN. Safe bearing capacity
of soil is 200 kN/m2, fcu=20
N/mm2, fy=415 N/mm2.Design a
square pad footing for a 300 mm square column supporting a factored
axial load of 800 kN. Safe bearing capacity of soil is 200
kN/m2, fcu=20 N/mm2,
fy=415 N/mm2.

QUESTIONS:
Design a square column footing for a 20-in. square
tied interior column that supports loads of DL (170) k and Live
load LL (210) k. The column is reinforced with eight No 8 bars, the
bottom of the footing is 5 foot below final grade, and the soil
weighs 100 lb. /ft3 the allowable soil pressure is 4 w ksf. The
concrete strength is 4,000 psi and the steel is Grade
60.

Explain the way to construct pad footing step by step with
sketch.
1) Setting Out
2) Excavation Works
3) Install Formwork
4) Install Reinforcement
5) Inspection of workdone before concreting
6) Concreting work

. Design a square footing for a 16-in. square
interior column with an ultimate dead load = 300
(k) and an ultimate live load = 200
(k). Take fy=60,000 psi,
fc=4000 psi, normal weight, and
qa= 4500 psf. Assume the base of the
footing is 4 (ft.) below grade. Draw the
reinforcement detail also. Check for one way and two way shears
with the support of diagram. With ACI code

Design an isolated rectangular footing to support an interior
column 40 cm × 40 cm in cross section and carries a dead load of
800 kN and a live load of 600 kN. Use f́c= 21 MPa, fy= 420 MPa, q
all (net) =200 kN / m2 , γsoil = 17 kN /m3 , and Df =1.25 m. Space
limitations are such that one lateral dimension cannot exceed 2.5
m

Design a square footing for a 18-inch. square column and a
superimposed dead load of 200 kips and a live load of 300 kips. The
maximum permissible soil pressure is 4000 psf. Use concrete with a
design strength of 3 ksi and grade 40 reinforcing bars with yield
strength of 40 ksi.

Q.2. Design a square footing for a 16-in.
square interior column with an ultimate dead load =
W1 (k) and an ultimate live load =
W2 (k). Take
fy=60,000 psi, fc=4000 psi,
normal weight, and qa= (w) psf. Assume
the base of the footing is h (ft.) below grade.
Draw the reinforcement detail also. Check for one way and two way
shears with the support of
diagram.
Student shall take the data given below in the table against...

Design an individual column footing where DL = 200k, LL = 500k,
allowable soil pressure = 3k/ft2, f′c col = 4ksi, f′c ftg = 3ksi,
28″ x 28″ column, supporting interior column.

Design an individual column footing where DL = 200k, LL = 500k,
allowable soil pressure = 3k/ft2, f′c col = 4ksi, f′c ftg = 3ksi,
28″ x 28″ column, supporting interior column.

The column of a ten-story concrete structure is considered short
column and is under axial loading of 900 kips dead and 400 kips
live load. Design a square column using f'c=5000 psf and fy=60000
psi. Determine vertical reinforcement and ties and draw a sketch.
Follow all requirements of ACI.

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