When building a house it is important to create a solid and reliable foundation.

To ensure these characteristics should be strictlyadhere to the requirements of the project, which specifies the size of the foundation, concrete grade, formwork design and the estimated amount of concrete in cubic meters.

However, after the actual installation of the formwork to change and deviation from the size specified in the project, and this should be taken into account when calculating the volume of concrete to order.

Calculating the volume of concrete foundation for the order is carried out using a simple formula, known even from school course of geometry for the box:
Volume = Width * Height * Length
or
Volume = Area * Height
If the width of the basement at the top is different from the width of the base used for the following trapezoid formula:
Volume = (width1 width2 +) / 2 * Height * Length
Dimensions for calculating the cubic capacity of the foundation should betake the actual mounted on formwork. Also take into account the presence of ribs if they are described in the project, and other elements that can affect the change in volume of concrete poured.

## Calculation of the strip foundation

There are several things that are important to consider incalculations. Strip foundation does not always have a rectangular shape may be various protrusions or recesses, in addition to the perimeter of the main foundation often have branches for interior walls and bridges. Some of the foundation may be different in width for further amplification. It should be divided into groups with the foundation of the same width between the inner walls of the casing. The amount is calculated as the sum of the volumes of each of the groups.
To determine the length of the foundation is not usedinternal or external size and the length of the perimeter of the basement in the midline between the formwork walls. This will avoid unnecessary payments volume in the presence of the foundation tape rotations. The same applies to the foundation under the inner walls.

## Calculation of the foundation slab

This type of foundation is formed as a solid reinforced concrete slab under the entire building. The calculation in this case is very simple and is performed according to the formula:
Volume = Area of ​​the foundation * The height of the foundation
Separately calculated cubic capacity ribs if they are needed, and added to the main volume.

If the construction of the foundation provide for the establishment of technological voids or holes, their total amount is deducted from the total.

## The calculation of the cubic capacity of piles

It calculates the volume of a single formula of the pile:
Volume = Area of ​​base * Height

To order, it is best to cubic content of the resulting increase by 15% in case there will be delays in the filling or manifest flaws in the formwork.

In the case of a broader basecalculated separately for the amount of the base and to the top, and after they are added together. Calculate the result for a single pile is multiplied by the number of piles in the foundation.