Without a competent and accurate planning of material consumption in the construction of steel structures it is impossible to make cost estimates and to predict upcoming financial costs. Therefore, any construction or production work starts with the fact that calculates the consumption of materials. In the process of compiling cost estimates, you can determine exactly how much metal will be needed during the construction of the structure.

But to calculate the electrode consumption will be quite difficult, as this figure may depend on many factors. However, in a practical way, we developed a special calculation formula, using which you will be able with great probability to calculate how much you'll need to use electrodes in the process of welding. Consider some of these formulas.

## The calculation for the ratio

A fairly accurate calculation can be carried out according to the formula, which includes the so-called coefficient of consumption of consumables, i.e. electrodes. This ratio was calculated for different categories of supplies, and it takes into account the consumption rate of the electrodes.

Looks like this formula: N = M * Crash, where:
The flow rate of material;
- M – mass of metal that will be subjected to welding;
- Crash – ratio.

Naturally, for this formula you will need to have a table for obtaining a value of the coefficient. Such a table can be found in Appendix A, "Rules of development of norms of consumption of materials in construction" (RDS 82-201-96).

## Calculation of physical characteristics of consumables and metal

In addition to the above formula to find out the consumption of the electrodes on the metal can, based on the physical characteristics of the metal that will be subjected to welding, and the characteristics of the electrode. This method also provides a fairly accurate result, and here the formula is as follows: G = F x L x Ground wire (1 cm3), where:

- G – the mass of the deposited metal;
- F – cross-sectional area;
- L – get the length of the seam.

Since the theoretical calculation is unlikely you will be able to find out some formula parameters, and in this case it will be expedient to use specialized tables given in the annexes to the RDS 82-201-96. The physical parameters of the weld are calculated by its location. For example, there is a big difference between horizontal and vertical welds of metal structures.