Collection 38 Manufacturing of technological metal structures in production bases

Coefficients for prices

Coefficients taking into account the use in working drawings of structures designed taking into account reliability coefficients for their intended purpose, in accordance with the Rules for taking into account the degree of responsibility of buildings and structures during design

printed:

should read

additions to the technical part

Additions to the technical part of pp. 1.41-1.43

clause 1.41. The prices in Table 02-014 are intended to determine direct costs and estimated costs when performing work on the installation of metal structures of vertical cylindrical steel tanks for oil and petroleum products with a capacity of 5000 m3 and 10000 m3 in accordance with the requirements of the “Rules for the construction of vertical cylindrical steel tanks for oil and petroleum products” PB 03-605-03.

clause 1.42. The prices in table 02-014 take into account the costs of hydraulic, pneumatic tests, as well as tests with a vacuum apparatus. Other types and scopes of control are carried out in accordance with PB 03-605-03 and the requirements of the work project and are taken into account additionally.

The prices take into account the costs of installing hatches (manholes) in the wall and skylights in the roof of the tank, nozzles for the measuring hatch, as well as installation nozzles. The insertion of other hatches and pipes, including receiving and distributing pipes, is taken into account additionally.

clause 1.43. The prices in Table 02-014 do not take into account the costs of installing metal structures for stairs and platforms. The costs of these works are determined additionally according to the corresponding tables of this collection.

additions to prices

Factors influencing price indicators

In order for the estimate to be calculated correctly, a clear understanding of the factors influencing the cost is necessary. Everything from the weather to the materials you use can affect the price of welding procedures.

But we will focus on those that really matter for welding.

The first step is to determine the scope of welding tasks. The type of welding chosen is important, as is the volume of consumables.

Arch welding using electrodes will be much cheaper than labor on a semi-automatic machine using tungsten rods and a gas structure.

There is a special formula that can be used to correctly calculate the price of your work. Using it, you will be able to calculate the correct tariff for the customer. It is worth dwelling on the methods that are relevant when assessing welding tasks.

Table 38-01-004. Platforms and stairs

Meter: 1t designs

Table 38-01-005. Overpasses, galleries

Meter: 1t designs

ESTIMATED PRICES FOR THE OPERATION OF CONSTRUCTION MACHINERY AND MECHANISMS

AT BASIC PRICES AS OF 01/01/2000

Table 38-01-006.Small individual designs

Meter: 1t designs

Methods for assessing the welding process

Before performing mathematical calculations, it is necessary to define methods that differ from numerical characteristics. In addition to formulas, there are other methods that will allow you to better understand the entire welding process.

Information is needed not only by those who prepare estimates for their home. When working in production and independently calculating the price of your work, the information described in this article will be useful.

In the 21st century, there is no single classification of methods for calculating the cost of welding work. It is important to know the main ones, which are used in 9 cases out of 10.

Visual assessment

This is the simplest and at the same time biased way of calculating the cost of welding work. It is called “by eye” and is calculated in the same way.

This method is full of contradictions, but it does not require additional measuring instruments and special knowledge, unlike other methods. It is used in welding work by beginners and those craftsmen for whom welding is not the main method of earning money.

The main criteria that are taken into account in the calculations are how much time, effort and materials were spent on implementation. In 8 cases out of 10, the price depends on what the client looks like.

If the master sees that the customer has money, then the price will usually be high.

Sometimes welders use a kind of hybrid calculation that involves combining a visual estimate and a formula.

In this case, they take the price of the metal, which in 80% of cases is assessed visually. This indicator is multiplied by 2. The method is considered primitive, but it is acceptable if welding is not your main way of earning money.

Mathematical formula

In 9 cases out of 10, a special computer program is used to calculate the cost of welding work.

This method is used by welders with 15 years of practical experience or more. To accurately calculate the price, you need to understand the difficulties of welding.

Based on the experience of the craftsmen, a methodology for correct cost calculation was developed. It consists of breaking down all the components of the process into parts.

The first step is to determine how much metal and consumables for welding cost. This is necessary both for home tasks and when welding production is established at the factory.

Once you have identified all the components in numbers, you should add them. You will receive an amount that you need to write on paper or enter into the computer.

This will be our main waste. After this, determine the complexity of the work. The price of conventional arch welding will be several times less. Resistance welding is a costly process.

Determine the price according to the principle “the more complex, the more expensive.” Consider the overhead factor. We are talking about the labor intensity of the process and the time spent on welding.

Put overhead and base costs together by adding them up. This figure will be the price of welding work. Additionally, you can add profit if you did not take it into account in advance when spending overhead.

You will be able to calculate the cost correctly, even if you do not have such experience. No special knowledge is needed for this.

Table 38-01-003. Lattice structures

Meter: 1t designs

Table 38-01-002. Monorails, beams and other similar structures of industrial buildings

Meter: 1t designs

ESTIMATED PRICES FOR MATERIALS, PRODUCTS AND STRUCTURES

AT BASIC PRICES AS OF 01/01/2000