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

What influences pricing

To calculate the estimate correctly, you need to understand what factors influence pricing. In simple words, what affects the final cost of your work. There are many factors, but we will highlight the most basic ones that apply to any type of welding.

The first factor is the volume of welding. This is logical; the amount of payment directly depends on the amount of work. But in addition to volumes, the complexity of the welding process, the type of welding chosen and the number of consumables used in welding must be taken into account. Agree, fast arc welding with electrodes is several times cheaper than semi-automatic welding using tungsten rods and gas.

Later we will tell you which formula to use in order to correctly calculate your welding work. Using the formula, you can set the optimal tariff for welding work. In the meantime, let's talk about methods for assessing welding work.

Table 38-01-006.Small individual designs

Meter: 1t designs

ESTIMATED PRICES FOR MATERIALS, PRODUCTS AND STRUCTURES

AT BASIC PRICES AS OF 01/01/2000

Work evaluation methods

Before you learn how to do the math, familiarize yourself with methods for estimating welding costs. After all, in addition to mathematical calculations, there are other methods. This knowledge will be useful both to home welders who want to make estimates, and to industrial craftsmen who are tasked with independently estimating the cost of their work.

There is no uniform classification of methods. But we will highlight the main ones, which are most common and easy to use.

Visual assessment

The simplest assessment of the cost of metal structures is visual, or “by eye” (as home craftsmen often call it). This is a very unstable and controversial method, but it is the most accessible of all and does not require any knowledge at all. Often, this method is used in their work by beginners or craftsmen who make simple metal structures (for example, greenhouse frames).

In such cases, the master takes into account the time and materials spent, and also evaluates his customer. If the latter looks wealthy, then most likely the master will ask for a higher price.

There is also a hybrid of visual assessment and calculation. Everything is simple here: the cost of the metal (which is often estimated just “by eye”), which was required for the manufacture of a metal structure, is taken and multiplied by 2. Again, a rather primitive method, but quite effective if welding is not your main income.

Mathematical calculation

The most common method. We have already talked about it earlier. To make a mathematical calculation, special formulas are used. The estimate is most often generated on a computer in a special program.

We would like to tell you separately about an interesting technique that allows you to quite simply calculate tariffs for your work. The essence of the technique is to break down all the components of welding so that they can be easily assessed. First you need to determine the cost of the metal and consumables necessary to carry out welding work in an industrial or home environment.

Let's summarize these indicators. We get the amount that needs to be written down. These are our main expenses. Next, we determine how difficult the welding will be (conventional arc welding or resistance welding to be performed, for example). Sets the cost (the more complex the welding, the more expensive it is). The labor intensity of production and the time spent on work are also taken into account. This is overhead.

Now let's sum up overhead and basic expenses. This is the cost of welding. You need to add profit on top or factor it into overhead costs in advance. Calculating the cost using the mathematical method is quite simple and does not require special knowledge.

Next, we will tell you how to calculate the cost of welding using a simple formula.

Table 38-01-003. Lattice structures

Meter: 1t designs

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

Meter: 1t designs