How to calculate concrete value of a trapezoidal foundation?

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Accepted Answer

To calculate the concrete value of a trapezoidal foundation, you need to determine the volume of concrete required.

Calculate the area of the trapezoidal foundation by using the formula: (a + b) * h / 2, where a and b are the lengths of the parallel sides and h is the height.
Multiply the area by the desired thickness of the foundation to get the volume of concrete required.
Consider any additional factors such as wastage, reinforcement, and formwork when estimating the concrete quantity.
For example, if the trapezoidal foundation has parallel sides of length 4 meters and 6 meters, a height of 3 meters, and a desired thickness of 0.5 meters, the area would be (4 + 6) * 3 / 2 = 15 square meters. If the volume of concrete required is 15 * 0.5 = 7.5 cubic meters.

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