Civil engineering is thought to be one of the oldest jobs in the world. From bridges to water treatment, their work helps the lives of most people in the world every single day.
A good Civil Engineer should know enough math and physics to find and solve engineering problems. If a Structural Engineer couldn’t figure out how much weight was being spread out across a bridge, that wouldn’t be a bridge we’d feel safe crossing.
It is important for them to know the most important formulas used by civil engineers when they work on a construction site. Important formulas help you figure out how much material you need for shuttering work, skirting work, plastering work, painting work, cornice work, and other things.
Know more about the top important formulas a civil engineer must know!
1. Rectangle
Application:
 Shuttering Area of Rectangle column, Pile Cap, Rectangle Isolated Pad Footing etc.
 Volume of Concrete of Rectangular Column, Footing, Beam, Pile Cap, Slab etc.
 Skirting of Tile in Rectangular Column etc.
Photo Courtesy: Quora
Length of Rectangle = L.
Breadth of Rectangle = B.
Height of Rectangle = H.
Formula
 Perimeter or Peripheral length (P) = L+ B +L + B =2 x (L + B).
 Area of Rectangle Crosssection = L x B.
 Area of Rectangle (A) = Peripheral Length x Height of Rectangle.
 Volume of Rectangle (V) = Area of Rectangle x Height of Rectangle.
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2. Square
Applications:
 Square column shuttering area, Pile Cap, Footing, etc.
 Concrete Volume of Square Column, Footing, Beam, Pile Cap, Slab, and Other Structures
 Tile skirting in a square column
Photo Courtesy: Javatpoint
Length of Square = L.
Breadth of Square = L.
Height of Square = H.
Formula
 Perimeter or Peripheral length of Square (P) = L + L+ L + L = 4L.
 Area of Square Crosssection = L^{2}.
 Area of Square (A) = Perimeter x Height of Square = 4L x H.
 Volume of Square (V) = Area of Square (A) x Height of Square.
3. Circle
Application:
 Calculation Shuttering Circular column area, Circular Pile area, and etc.
 Volume of Concrete of Circular Column, Circular Pile etc.
 Skirting of Tile in Circular Column etc.
Photo Courtesy: Toppr
Diameter of Circle = D.
Radius of Circle = r.
Height of Circle = H.
Important Formulas
 Perimeter (P) = 2 x π x r.
 Area of Circular Crosssection = π/4 x D^{2} or π r^{2}.
 Area of Circle (A) = Peripheral Length x Height of Circle.
 Volume of Circle (V) = Area of Circle x Height of Circle.
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3.1 Semi Circle
Photo Courtesy: Twinkl
Diameter of Circle = D.
Radius of Circle = r.
Important Formulas
 Perimeter (P) =1/2 x (Perimeter of Circle) = 1/2 x (2 x π x r).
 Area of Semicircle = 1/2 x (Area of Circle) = 1/2 x (π/4 x D^{2} ).
4. Triangle
Application:
 Calculation of shuttering area of Staircase Steps etc.
 Volume of Ramp, Staircase steps etc.
Photo Courtesy: Civil Success Online
Breadth of Triangle = B.
Height of Triangle =H.
Inclined Length of Triangle = C.
Length of Triangle (L) = L.
Formula
 Inclined Length (C) =√ (B^{2} + H^{2}).
 Perimeter = B + H + C.
 Area of triangle crosssection (A) = 1/2 x B x H.
 Area of Triangle = Perimeter x Length of Triangle.
 Volume of Triangle (V) = Area of Triangle x Length of Triangle.
5. Frustum
Application:
 To determine the volume of concrete required for the slump test.
Photo Courtesy: Pinterest
Radius of upper base = r.
Radius of Lower base = R.
Slant height = s.
Height of frustum =h.
Important Formulas
 Volume of Frustum = 1/3πh (r^{2} + rR + R^{2}).
 Lateral Surface Area = π(r + R)s.
 Total surface Area = π(r +R)s + πr^{2} + πR^{2}
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Civil engineers also need to know how to design things and work with maps, drawings, and models, as well as how to use CAD software to make things. They need to solve potential problems before they even happen.
CITATIONS:

Shah, S. (2020, November 22). Top Important Formulas Used by Civil Engineer While Working at Construction Site Part 1. Civil Success Online. Retrieved December 13, 2021, from https://civilsuccessonline.com/topimportantformulasusedbycivilengineerwhileworkingatconstructionsitepart1/

Jamal, H. (2017, May 10). Importance and Applications of Civil Engineering. About Civil. Retrieved December 13, 2021, from https://www.aboutcivil.org/importanceandapplicationsofcivilengineering.html
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