In: Civil Engineering
Answer the following questions from Civil Engineering Licensure Examination
a. CE Board May 2007
A 300 mm concrete wall supports a dead load of 300 KN/m and a live
load 0f 220 KN. The allowable
bearing pressure is 240 KN/m2 and the level of the footing is 1.2 m
below the ground surface. Assume
concrete weighs 24 KN/m3 and that of soil is 16 KN/m3, fc’ = 28
Mpa, fy =248 Mpa. Use 28 mmθ
reinforcing bars. Thickness of footing = 600 mm, steel covering 100
mm. Determine the spacing of bars
at critical section.
b. CE Board May 2012
A 450 mm square interior column carries a dead load of 825 KN and a
live load of 668 KN. A
rectangular footing is required to carry the column loads such that
the length of the long side must be
equal to twice the width of the short side. Assume base of footing
is 1.5 m below the ground surface.
Allowable bearing pressure of soil is 15.74 KN/m3 and that of
concrete is 23.5 KN/m3. Use normal
weight concrete. Thickness of footing is 0.60 m. Determine the
steel requirements in the short and
long direction