Civil
Engineering Basic Knowledge
Today, I will discuss some important basic knowledge
in civil engineering. This knowledge is crucial for every civil engineering
student, whether they are working on a construction site, studying, or just
interested in the field. This is part one of a series, so let's get started!
Weight and Density
of Cement
·
The weight of one bag of cement is 50 kgs.
·
The density of cement is 1440 kgs per cubic meter.
Minimum Thickness of
Slab
The minimum thickness of a slab should be 0.125 meters
or 125 millimeters.
Central to Central
Distance
In steel structure design, the central to central
distance (c/c) is the spacing between two steel rods. Typically, it is around
six inches or 0.125 meters.
Thickness of DPC
(Damp Proof Course)
The thickness of the damp proof course should not be
less than 2.5 centimeters or one inch.
Development Length
Development length refers to the length of steel rods
embedded in concrete to ensure a good bond between the two materials. It is
important for the structural integrity of beams and other members.
Slope of Stairs
The slope of stairs should be between 25 to 40
degrees. This ensures comfortable usage and reduces the risk of accidents.
Riser and Tread
Dimensions
The riser height should be between 150 to 200 millimeters,
while the tread width should be between 250 to 300 millimeters.
Number of Bricks in
One Cubic Meter
Approximately 550 bricks are required in one cubic
meter.
M20 Grade Concrete
M20 grade concrete is a commonly used concrete mix
with a ratio of 1:1.5:3 (cement:sand:aggregate). It is often used for slab
construction.
Unit Weight of Steel
The unit weight of steel can be calculated using the
formula: (d^2/162) kg/m, where d is the diameter of the steel rod in
millimeters.
Lapping of Steel
Bars
Lapping of steel bars should not be provided for
diameters greater than 36 millimeters. Coupler methods can be used instead.
Free Fall of
Concrete
The height of free fall for pouring concrete should
not exceed 1.5 meters to prevent issues like bleeding and segregation.
Compressive Strength
of Brick
The compressive strength of a brick should not be less
than 7.5 Newton per square millimeter.
Number of Steel Bars
To determine the number of steel bars needed for a
slab, divide the length of the opposite side by the spacing (c/c) plus one.
Thank you for watching this video on civil engineering
basic knowledge. Stay tuned for part two!