How to calculate the concrete quantity of a trapezoidal footing?

Hello friends, in this article today I will teach you how to find the volume of trapezoidal shape and also its quantity of trapezoidal footing
First, We have to calculate the below rectangular part separated by the dotted line (refer the diagram), using rectangular area formula.
 For rectangular, the Area = A x B
 For Square, the Area = A^{2 }(assuming A=B)
Trapezoidal Footing Formula with drawing
Trapezoidal Footing Volume,
V = h/3 (A1+A2+√(A1 x A2))
Where, h – Height of trapezoidal (refer the diagram)
A1 – Area of the lower shape
A2 – Area of the upper shape
Let’s take this example and solve,
Calculation
We know the formula,
Here, we have assumed square footing,
V = h/3 (A1+A2+√(A1 x A2))
{ Where, A1 = 1.6 x 1.6 = 2.56 m^{2 }; A2 = 0.8 x 0.8 = 0.64 m^{2} }
= 0.3/3 ( 2.56 + 0.64 + √(2.56 x 0.64))
V = 0.448 m^{3}
read more:
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