Civil Engineering Basic Knowledge:
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.
