How to correctly calculate the forest in cubes. How to calculate the volume of round timber correctly: instructions for making calculations

When implementing construction works for the construction of a residential building, a specialist must perform big number various tasks, some of which are: drawing up and calculating the estimated cost before the final finishing of the premises of a residential building. It is imperative to calculate the required amount of various building materials, which is quite difficult to do. Therefore, such knowledge - how many boards are in a cube - is very important for a specialist who is engaged in the construction of a residential building and wants to do the work as efficiently and quickly as possible in time.

Buyer's club: existing types of boards

To calculate exactly how many pieces of boards are in a cube, you need to know not only what exactly a cube of a board means, but it is worth understanding important point that there are different types of boards and what is the opportunity to purchase on modern market for a variety of construction work. It should be noted that the cube of almost all materials, regardless of the type of material, is calculated in the same way, that is, according to one specific method. The types of boards have no influence on the calculation of the cubic capacity of this building material.

The non-grooved type of lumber are: timber, various edged boards, as well as unedged boards (they are an exception when calculating the cubic capacity, because this process takes place a little differently). The grooved types (which have special grooves for making a joint) include: modern wall paneling, blockhouse, floor material, as well as imitation of natural timber. When you choose a grooved type of building material for purchase, then you will need to draw your attention to the fact that when calculating, only the working width of the board is used without a spike. If we talk about a blockhouse (imitation of a log), then when calculating the cubic capacity, only the thickness at its highest point is taken.

What is the number of boards in 1 cube: calculation

Any person, even from his school days, understands how the cubic capacity is calculated. For this procedure, it is necessary to calculate quantities such as: length, width and height. A similar principle is used to calculate the cubic capacity of 1 board. When performing such calculations, it is recommended to convert all available values ​​to meters. Cubic capacity of 1 board, which has a section of 150x20 mm. and a length of 6 m, it is calculated as follows: 0.15 is multiplied by 0.02 and 6, so that the cubic capacity of this board will be 0.018 cubic meters.

Apply the volume formula V = L * h * b (where L is length, h is height, b is width).

L = 6.0; h = 0.02; b = 0.15.

Thus, V = 6.0 * 0.02 * 0.15 = 0.018 m 3.

To determine how many boards are in one cube: divide 1 m 3 by cubic capacity (the volume of one board).

1 m 3 / V = ​​N pcs.

1 m 3 / 0.018 m 3 = 55.55 pcs.

Thus, the number of boards in one cube is 55.5 pieces.

It is quite easy to find out the cost of a certain type of board when the values ​​of its volume are known: 0.018 is multiplied by the price of 1 cubic meter. When 1 cube of a certain type of board has, for example, a cost of 5500 rubles, then the cost will be 99 rubles. At this point in the calculation, there is some trick of salespeople and managers in hardware stores, because the cubic capacity of the material is rounded up to some whole values.

Such rounding can lead to such a moment that the price of 1 board (when 1 cube costs 5500) will be completely different values. In addition to all this, it should be noted that various boards for construction, which have a nominal length of 6 meters, in fact, the length is 6.1 - 6.2 m, which is not taken into account when selling this building material. This also applies to the acquisition of a significant number of boards. This is quite clearly seen if, for example, a 150x20 mm board is used. The number of boards in a cube is 55.5 pieces. But, in a cube, 55 pieces are considered, that when the calculation is made, there will be a value of 0.99 cubic meters. In fact, it follows from this that the overpayment for 1 cubic meter of this popular building material can be 1% of the real price. For example, 5500 instead of 4995 rubles.

To calculate the cubic capacity for a non-cut type of board, slightly different methods are used. When it comes to buying 1 board, then the measurement of its thickness, as well as the total length, is carried out in the same way as when choosing an edged building material. In this case, the width for calculations is taken as averaged - between great value and small.

For example, when at the end the width of the board is 25 cm, and at the other 20, then the average value will be approximately 22 centimeters. When it is necessary to calculate the volume of a significant number of such boards for construction, then it will be necessary to expand them so that the wide one does not differ from the narrow one, more than 10 cm. The main length of this material in the laid out pile should be approximately the same. After that, using a regular tape measure, an accurate measurement of the height of the entire existing stack of boards is made, the width is measured (approximately in the middle). The result obtained will then need to be multiplied by a special factor, which is a value from 0.07 to 0.09, in direct proportion to the existing air gap.

How many boards are in 1 cube: special tables

To calculate exactly how many boards of a certain width, length in 1 cubic meter, various tables are used. Below are several such specialized tables, which indicate the cubic capacity of the types of this material common and in demand today. Calculate the volume of various boards having different sizes, for example, material for erecting a fence on your site, it is possible to independently, using the existing formula, which is presented above.

Table of the number of edged boards in 1 cubic meter

Board size Volume of the 1st board (m 3) Number of boards in 1m 3 (pcs.) Number of square meters in 1m 2
Twenty
Board 20x100x6000 0.012 m 3 83 Item (s) 50 m 2
Board 20x120x6000 0.0144 m 3 69 pcs. 50 m 2
Board 20x150x6000 0.018 m 3 55 pcs. 50 m 2
Board 20x180x6000 0.0216 m 3 46 pcs. 50 m 2
Board 20x200x6000 0.024 m 3 41 Item (s) 50 m 2
Board 20x250x6000 0.03 m 3 33 pcs. 50 m 2
Twenty-five
Board 25x100x6000 0.015 m 3 67 pcs. 40 m 2
Board 25x120x6000 0.018 m 3 55 pcs. 40 m 2
Board 25x150x6000 0.0225 m 3 44 pcs. 40 m 2
Board 25x180x6000 0.027 m 3 37 pcs. 40 m 2
Board 25x200x6000 0.03 m 3 33 pcs. 40 m 2
Board 25x250x6000 0.0375 m 3 26 pcs. 40 m 2
Thirty
Board 30x100x6000 0.018 m 3 55 pcs. 33 m 2
Board 30x120x6000 0.0216 m 3 46 pcs. 33 m 2
Board 30x150x6000 0.027 m 3 37 pcs. 33 m 2
Board 30x180x6000 0.0324 m 3 30 pcs. 33 m 2
Board 30x200x6000 0.036 m 3 27 pcs. 33 m 2
Board 30x250x6000 0.045 m 3 22 pcs. 33 m 2
Thirty-two
Board 32x100x6000 0.0192 m 3 52 Item (s) 31 m 2
Board 32x120x6000 0.023 m 3 43 Item (s) 31 m 2
Board 32x150x6000 0.0288 m 3 34 pcs. 31 m 2
Board 32x180x6000 0.0346 m 3 28 pcs. 31 m 2
Board 32x200x6000 0.0384 m 3 26 pcs. 31 m 2
Board 32x250x6000 0.048 m 3 20 pcs. 31 m 2
Fortieth
Board 40x100x6000 0.024 m 3 41 Item (s) 25 m 2
Board 40x120x6000 0.0288 m 3 34 pcs. 25 m 2
Board 40x150x6000 0.036 m 3 27 pcs. 25 m 2
Board 40x180x6000 0.0432 m 3 23 pcs. 25 m 2
Board 40x200x6000 0.048 m 3 20 pcs. 25 m 2
Board 40x250x6000 0.06 m 3 16 pcs. 25 m 2
Fifty
Board 50x100x6000 0.03 m 3 33 pcs. 20 m 2
Board 50x120x6000 0.036 m 3 27 pcs. 20 m 2
Board 50x150x6000 0.045 m 3 22 pcs. 20 m 2
Board 50x180x6000 0.054 m 3 18 pcs. 20 m 2
Board 50x200x6000 0.06 m 3 16 pcs. 20 m 2
Board 50x250x6000 0.075 m 3 13 pcs. 20 m 2

Table of the amount of timber in 1 cubic meter

Timber size Volume of 1 piece (m³) The amount of timber in 1m³ (pcs.)
100 × 100 × 6000 0.06 m 3 16 pcs.
100 × 150 × 6000 0.09 m 3 11 pcs.
150 × 150 × 6000 0.135 m 3 7 pcs.
100 × 180 × 6000 0.108 m 3 9 pcs.
150 × 180 × 6000 0.162 m 3 6 pcs.
180 × 180 × 6000 0.1944 m 3 5 pieces.
100 × 200 × 6000 0.12 m 3 8 pcs.
150 × 200 × 6000 0.18 m 3 5.5 pcs.
180 × 200 × 6000 0.216 m 3 4.5 pcs.
200 × 200 × 6000 0.24 m 3 4 things.
250 × 200 × 6000 0.3 m 3 3 pcs.

Table of the number of unedged boards in 1 cubic meter

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  • analysis of the raw material base and working capital for production
  • calculation of the main equipment
  • calculation of additional equipment and mechanisms
  • the cost of installation, commissioning, personnel training
  • calculation of the cost of preparing a production site
  • calculation of the cost of production or waste disposal complex
  • calculation of the profitability of a production or waste disposal complex
  • calculation of return on investment
    • The cost of calculations is determined after receiving an official request and forming the list and completeness of our services.

    SPECIALIZATION OF BM Engineering:

    • EQUIPMENT PRODUCTION: pellet / briquette lines, drying complexes, disintegrators, biomass presses
    • INSTALLATION OF PRODUCTION COMPLEXES: design, site search, construction, commissioning
    • EQUIPMENT START-UP: starting and configuring equipment
    • TRAINING: setting up the work of the technical department, creating sales, logistics, marketing departments from "0"
    • SERVICE MAINTENANCE: full service and warranty service
    • PRODUCTION AUTOMATION: implementation of control and accounting systems in production
    • CERTIFICATION: preparation for certification according to EN +, ISO

For the first time on the Ukrainian market, an engineering company in the field of biomass processing BM Engineering provides a full range of services for the creation of turnkey modern biomass processing plants producing pellets, briquettes, and compound feed. At the stage of project preparation, the company's specialists give a qualified opinion on the feasibility of building the facility, its estimated profitability and payback period.

We analyze future production from A to Z! We begin the study by calculating the volume of the raw material base, its quality, and logistics of supplies. The amount of biomass at the initial stage and its supply should be sufficient for smooth operation equipment for a long time. Based on objective information collected about future production, we calculate the characteristics of the main equipment, and, at the request of the customer, additional equipment and mechanisms.

The total cost of the project necessarily includes the costs of preparing the production site, installation and commissioning works, personnel training. And in the forecast of the cost of production, energy efficiency and the specific cost of production of a unit of finished product, its technical and quality characteristics, compliance international standards, profitability and payback period. The use of equipment for the production of extruded feed significantly increases the profitability of animal husbandry by improving their quality and reducing the cost.

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The full range of engineering services performed by BM Engineering includes: drawing up a business plan for production with the calculation of energy efficiency, profitability and cost of production, design, construction, commissioning, commissioning and service maintenance... In addition, the company supplies equipment own production, carries out work on automation and certification of built enterprises.

The unique module for processing biomass (chips and sawdust) MB-3 was developed according to the latest technology, in which bio-raw materials are not dried before pressing with high energy costs, but washed in a water washer. Pollutants (metal, soil particles, debris) are removed by a stream of water, and clean and wet particles of raw materials along a conveyor, and then through a sieve, enter the input hopper of the processing module.

The rotating auger grinds the wet biomass and forces it through the sieve. During a biochemical reaction, heat is generated in wood cells (biopolymers). Optimum temperature the moistened mass is supported by the thermal stabilization module. The heat pump circulates heated water throughout the entire processing circuit. The whole technological process controls the automation system.

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  • weight - 16700 kg.

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Selecting a Volume Measurement Method

The choice of methods for accounting and measuring the volume of wood
regulated by the following regulatory documents
(GOSTs):

  • for firewood and off-grade (fuel) wood
    GOST 3243-88
    Firewood. Technical conditions
    Download (Downloads: 6871)
  • for round wood
    GOST 2292-88
    ROUND TIMBER

    measurement methods and acceptance
    Download
  • You can read more generally and extensively in the reference book:
    GENERAL REGULATIONS FOR FOREST TAXING

The requirements of GOSTs read as follows:

  1. Round wood with a length of over 2 m and fuel wood (firewood) with a length of more than 3 m - are subject to piece measurement and accounting in a dense measure, in accordance with the tables of the volume of round wood (). In special cases (specified in GOST 2292-88, clause 1.2), round wood up to 2m long is also subject to piecemeasurement and accounting in a dense measure, c. Special cases are wood valuable breeds, raw materials for plywood production, aviation materials, etc.
  2. The volume of all other wood that is not included in the above categories is measured by the method of converting the fold measure into a dense one.
    (from warehouse meters -> to cubic meters)
    (free download)

Thus, from the requirements of GOSTs, the following follows:

  1. Dense measure, () is the main way to account for the volume of any wood material, including firewood. Measuring the volume of wood in a dense measure is a very cumbersome and time-consuming way of carrying out measurements and calculations, since in this case the diameter of the end and the length of each log is measured piece by piece

    Cubic meter (dense measure)

    Dense measure- the main method of measuring and accounting for the volume of wood.
    Dense measure- This is the net volume of wood pulp, which is defined as the volume of the cylinder of each log, taking into account the average thickness of the trunk.

    Wherein:

    • each log is measured individually and
    • when measuring the diameter of the end -
      the upper cut (smaller end) is selected
    • when measuring the diameter of the end -
      does not take into account the thickness of the bark and sap layer
    • when measuring the diameter of the end -
      the diameter of the oval end is taken equal to
      arithmetic mean
      between its highest and lowest value
    • the correction of the value is always made in minus from the gradation according to GOST
      (for example, the end diameter of 18.8 cm is taken as 18 cm, not 19 cm, the length of the log 4.47 m / p is taken equal to 4 running meters, not four and a half, etc.)
    • The measurement method for round timber is regulated by
      GOST 2292-88
      ROUND TIMBER
      Marking, sorting, transportation,
      measurement methods and acceptance
      Download (Downloads: 5442)
    • After taking measurements,
      the volume of each log is determined
      according to the tables of the volume of round timber (by)

    Dense measure unit - cubic meter (cubic meter)

    To speed up and simplify the determination of the amount of round timber, they use a special method of accounting for it - point wood. The forest method is not regulated by any regulatory document and, in essence, is a variant of verbatim writing

    Dotting forest

    "Dotting" (dotting) of the forest is a method of shorthand writing for recording the number and parameters of logs and decks, used for accounting when listing tree trunks, stacked or "standing". At the same time, a table is drawn up in an arbitrary form, in which the measured (taken into account) parameters of round timber (round timber) are recorded. Most often, these are the diameters and length of the logs, less often - the species of wood, sometimes - combinations of other required values ​​(age, species, etc.).

    The term "wood sharpening" was born in those distant times, when there were still no computers and calculators. In ancient times, foresters used this prototype of stenographic counting. This, however, does not detract from the merits of this method of accounting in our days. Its essence lies in the fact that each number corresponds to its own drawing, a kind of hieroglyph that denotes this number.

    The term "point" itself comes from the words "points", which are put in the process of accounting

    The first point is conventional sign, which is applied to the end of the registered and measured log, in order to avoid its repeated counting. The concept of a "point" at the end of a log is a complete convention. It can be anyone visible mark, the meaning of which is chosen depending on the circumstances. For example, it can be a special forester's mark, the size of the logged log's diameter, or just a slash drawn with chalk.
    ... The second point is entered into the table in a special way and participates in further calculations of the amount of forest
    It happens like this:
    - the first four logs are four points at the corners of an imaginary square,
    - the next four logs are the connecting lines of these points to each other in a square
    - and, finally, 8 and 9 logs are the diagonals of the square
    In total - 10 logs symbolizes a square with crossed out diagonals
    - Further - everything is repeated until the end of the calculation.

    Round wood volume

    The volume of round timber is determined after turning round timber, when it becomes known how many and what diameter of logs are contained in the stack. To determine the volume of round timber, open the cubicle box and by simple multiplication we find out the volume of recorded timber.
    Cubaturnik- a special table for calculating the volume of round timber. The diameters go along the vertical of the cubicle, and the lengths of the logs go horizontally. At the intersection of the vertical and horizontal lines - the volume for each log of the specified length and diameter.

    Tables of the volume of round wood (cubicle)

    Cubatorn is colloquially called GOST 2708-75
    TIMBER ROUND Tables of volumes

    : "(Link-category)"

      (related-news)

If with the definition of weight and volume, for example, when buying liquids, or bulk materials, no tasks appear, then the opposite is true with timber. Here the system for determining the volume of the required amount of a given raw material raises a lot of questions, from the fact that no one wants to pay extra money.

Instructions

1.

2. First, the measured batch of business slab should be sorted into 2 groups. One group is made up of boards longer than 2 m, the other - less than 2 m. Stacking in a pile is made with thick and thin ends alternately in different directions, while the surface of the slab remains at the bottom and top. The stack must be super compact and tightly stacked at right angles and of the same height.

4. The volume of coniferous and deciduous sawn timber can be determined by two methods. The 1st method provides for the frozen entire bar or board, and then the volume, after which the results are summed up.

5.

6. It is absolutely worthwhile to dwell separately on measuring the cubic capacity of a round forests... Here it is possible to measure each log separately - the length and width of the upper and lower ends. Special tables on which these calculations are made are called cubes, which were discussed above.

7. Later, after the volume of the entire log is measured separately, addition is performed, and the total cubic capacity is obtained. Currently, there is a corresponding computer program more closely.

If, for example, there are no problems with the determination of weight and volume, for example, when buying liquids or bulk materials, then the opposite is true with timber. Here the system for determining the volume of the required amount of a given raw material raises a lot of questions, from the fact that no one wants to pay extra money.

Instructions

1. It turns out that in the distance, not all customers have an idea of ​​how many types of wood actually exist. And tea differs from each other in the degree of processing, type, grade, which directly affects its cost. Here's how the slab volume is calculated - a hefty type of lumber in demand.

2. First, the measured batch of business slab should be sorted into 2 groups. One group consists of boards with a length of more than 2 m, the other - less than 2 m. Stacking in a stack is carried out with thick and thin ends alternately in different directions, while the surface of the slab remains at the bottom and top. The stack must be super compact and tightly stacked at right angles and of the same height.

4. The volume of sawn timber made of coniferous and deciduous wood can be determined by two methods. The 1st method provides for the freezing of any bar or board, and then the volume, after which the results are summed up.

5. Method 2 - with the help of a cubature, a special table prepared for determining the volume of such sawn timber. The measurement of boards related to unedged sawn timber is made in a slightly different way. In this case, the width of the one-sided cut and unedged boards calculated as the half-sum of the upper and lower planes.

6. It is unconditional that it is worthwhile to dwell separately on the measurement of the cubic capacity of round timber. Here it is possible to measure each log separately - the length and width of the upper and lower ends. Special tables on which these calculations are made are called cubes, which were discussed above.

7. Later, after the volume of each log is measured separately, addition is made and the total cubic capacity is obtained. Currently, there is a corresponding computer program more closely.

Related Videos

16.06.2014 21:04

After all the ideas for the implementation of building a house have been worked out and the final version of building a house from a rounded log has been chosen, the question arises how much such a house will cost you. To determine the cost of building a log house from rounded logs , you need to know how many cubes of logs are in this log house. In this article, we will try to explain in detail how to calculate the cubic capacity for the construction of a rounded log.

Calculation of the cubic capacity of a rounded log

The easiest way to calculate is by the formula - πr². H

Π — 3,14

r² - the radius of the rounded logs squared

H - the length of the rounded log

We substitute the data into the formula:

3.14 * (0.11 m) ² * 6m = 0.228 m3

So, we got how many cubes are in one rounded log with a diameter of 220 mm. Next, you need to calculate how many logs are in your house and multiply the resulting amount by the cubic capacity of one log (0.228 m3). It is easy to calculate the number of logs in the wall, but initially you need to determine for yourself what height the floor will be.

Calculation of the cubic capacity of lumber is not an easy task, but it is necessary

It is also necessary to add 7% to the obtained height by shrinkage if the log is of natural moisture.

For example, the height of the first floor is 2.9 meters. The height of one log 220 mm minus the lunar groove will be 190.5 mm. Next, we divide the floor height of 2.9m by the thickness of the log without a groove - 0.19m, having converted all the numbers into meters in advance.

2.9: 0.19 = 15.26 pieces. We got required amount logs with a diameter of 220 mm in order to build a floor with a height of 2.9 meters. It is necessary not to forget and add 7% for the shrinkage of the house. The total is 16 crowns. Now, in order to find out the total volume of the floor of a 6x6 house, with a height of 16 crowns, you need to perform the following calculation:

16 (crowns) * 4 (walls) * 0.228 (volume of one log) = 14.6 m3 of a log. Now, to find out the cost of a rounded log for the whole frame, you need to multiply the number of cubes received by the price of a log for one cubic meter. The cost of one meter of a cubic rounded log can be found out here .

To perform calculations for other log diameters, we bring to your attention a number of pre-calculated tables, using which you will surely find answers to your questions.

The article was prepared by the company ASK Aegis which performs construction of houses from logs and renders wide range construction services in the suburban housing market.

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Methodology for calculating the mass and volume of felling residues

One of the tasks in the development of the draft technological regulation of the Construction and Demolition Waste Management Process is to calculate the mass and volume of felling residues formed during the cutting down of green spaces (demolition of trees) in the construction or demolition zone.

The official methodology for calculating the mass and volume of felling residues for these purposes in Russian Federation no. The initial data for such calculations are information about the trees cut down (species, height and thickness at a height of 1.3 m) and shrubs (young stands), given in the inventory list from the design documentation for the construction (demolition) object.

This article presents a methodology for calculating the mass and volume of felling residues, developed in our company. As a basis for its development, the tabular data of the All-Union standards for forest taxation, approved by the Order of the State Committee for Forestry of the USSR dated February 28, 1989, No. 38, were used.

1) The data in Table 17 "Trunk volumes (in the bark) in young stands in height and diameter at a height of 1.3 m" - to determine the volume of trunks of young growth and shrubs.

Round log cubicle

As a result of processing the above data to determine the average ratio between the diameter (D), height (h) and volume (V) of one trunk, the calculated shape factor (Kp from Table 1) was determined, which, with an accuracy of +/- 10%, allows to determine the volume of the trunk by formula Vst = Kn * h * pD2 / 4.

2) The data of tables 18 and 19 "Volumes of trunks (in the bark) of tree species in height and diameter at a height of 1.3 m with an average shape factor" "- to determine the volume of trunks of various tree species. As a result of processing the above data to determine the average ratio between the diameter (D), height (h) and volume (Vst) of one trunk, the calculated coefficients were determined for some of the tree species listed in the table, which, with an accuracy of +/- 10%, makes it possible to determine the volume of the trunk according to the formula Vst = Kn * h * pD2 / 4. Calculated coefficients the forms are shown in table 1

3) Table data 185 “Mass of 1 cubic meter. m and the volume of 1 ton of wood of different species "- to determine the mass of wood, we used the values ​​of the mass of one cubic meter of the corresponding wood species from the column" freshly cut ", or from the column" dry "- for dead wood.

4) The data of table 206 "Volume of bark, branches, stumps and roots" to determine the volume of branches and branches, as well as stumps and roots as a percentage of the volume of trunks. For the calculation, the average values ​​from the interval given in the tables were used. The volume of twigs and branches - 7% of the volume of the trunks, the volume of stumps and roots - 23% of the volume of the trunks.

5) The data in table 187 "Coefficients of full wood content of brushwood and chmyz" - to determine the fold volume of branches and branches from full wood volume using a conversion factor equal to 10.

FKKO-2014 contains codes for the following waste:

1 52 110 01 21 5 Waste branches, branches, tops from logging

1 52 110 02 21 5 Waste from the removal of stumps

1 54 110 01 21 5 Waste of low-value wood (brushwood, dead wood, fragments of trunks).

Therefore, the calculation of the mass and volume of felling residues must be calculated by type of waste:

  • the trunks of trees, young growth and shrubs cut down according to the inventory list can be attributed to waste of low-value wood (brushwood, dead wood, fragments of trunks);
  • twigs and branches - to waste branches, branches, tops from logging;
  • stumps and roots - to waste of uprooting stumps.

For the technological regulations of the Construction and Demolition Waste Management Process, it is necessary to calculate the mass of waste, but for temporary storage in storage bins and their removal from the construction site, it is also necessary to estimate the volume of felling residues, moreover, in the storage volume.

The calculation is made using the Excel application. An example of an Excel page table header is shown in Table 2.

The calculation was made in the following order:

1) Filling in the initial data according to the inventory;

column 2 - line number of the counting sheet;

column 3 - wood species;

column 4 - the number of trees;

column 5 - the minimum diameter of the trunk from the interval indicated in the listing;

column 6 - the only value of the trunk diameter indicated in the listing;

column 7 - the maximum diameter of the trunk from the interval indicated in the listing;

column 8 - the minimum height of the trunk from the interval indicated in the counting sheet;

column 9 - the only value of the trunk height indicated in the counting sheet;

column 10 - the maximum height of the trunk from the interval indicated in the counting sheet;

column 11 - additional number of trunks - if in the column "characteristic of the state of green spaces" n trunks for one tree are indicated, then in column 11 it is indicated (<значение графы 11>= (n-1) *<значение графы 4>.

2) Calculation of the average value of the trunk diameter in the presence of an interval:<среднее значение диаметра ствола (графа 6)> = (<значение минимального диаметра (графа 5)>+<максимальное значение диметра (графа 7)>)/2;

3) Determination of the volume of one barrel<объем ствола (графа 12)>produced according to Vst = Кn * h * пD2 / 4, where Кn is the corresponding form factor from Table 1, D is the average diameter of the trunk, h is average height trunk. Calculation of the volume of one barrel:<объем ствола в куб.м (графа 12)>= Кn * π * (<диаметр ствола в см (графа 6>/100)* (<диаметр ствола в см (графа 6>/100)*< высота ствола в м (графа 9)>/ 4);

4) Calculation of a dense measure of the volume of trunks Vpl = Vst * nst, where nst is the total number of trunks:<плотная мера объема стволов (графа 13)> = <средний объем ствола в куб.м (графа 12)>*(<число деревьев или кустов (графа 4)>+<число дополнительных стволов (графы 11)>). For one bush, the number of additional trunks is assumed to be 5 .;

5) Calculation of the storage measure (when storing or transporting, it is necessary to take into account the average volume of space occupied by the trunks of trees or bushes:<складочная мера объема стволов (графа 14)>= <плотная мера объема стволов (графа 13)>* 4 / p;

6) The calculation of the volume of branches and branches depending on the volume of the trunk is carried out in accordance with paragraph d) of this article:<объем сучьев и ветвей в плотной мере (графа 16)> = <плотная мера объема стволов (графа 13)> *<переводной коэффициент (графа 15=0,007)>... In a fold measure - in accordance with paragraph e) of this article:<объем сучьев и ветвей в складочной мере (графа 18)> = <объем сучьев и ветвей в плотной мере (графа 16)>*<переводной коэффициент (графа 17=10)>;

7) The calculation of the volume of stumps and roots from the volume of the trunk is carried out in accordance with paragraph d) of this article:<объем пней и корней в плотной мере (графа 20)> = < плотная мера объема стволов (графа 13)>*<переводной коэффициент (графа 19=0,23)>... In the fold measure, the volume of stumps and roots is taken in a double volume:<объем пней и корней в складочной мере (графа 21)> =<объем пней и корней в плотной мере (графа 20)>*2.

8) Calculation of the total volume of wood in a dense measure:<полный объем (графа 22)> = <объем стволов в плотной мере (графа 13)>+<объем сучьев и ветвей в плотной мере (графа 16)>+< объем пней и корней в плотной мере (графа 20)>;

9) Calculation of the total volume of wood in the fold measure ( this indicator most objectively allows you to assess the need for the capacity of the bodies (containers) of vehicles for the removal of felling residues):<полный объем древесины в складочной мере (графа 23)> = <складочная мера объема стволов (графа 14)>+ <объем сучьев и ветвей в складочной мере (графа 18)>+ <объем пней и корней в складочной мере (графа 21)>

10) The volumetric weight of wood in a dense measure (density in t / m3) is recorded in column 24 in accordance with paragraph c) of this article, for species that are not in table 185 - in accordance with Appendix 3 to SNiP II-25-80 (Density of wood and plywood ).

11) Calculation of the weight of the trunks:<вес стволов (графа 22)> = <объем стволов в плотной мере (графа 13)>*<объемный вес древесины (графа 21)>;

12) Calculation of the weight of branches and branches:<вес сучьев и ветвей (графа 26)> = <объем сучьев и ветвей в плотной мере (графа 16)>*< объемный вес древесины (графа 24)>;

13) Calculation of the weight of stumps and roots:<вес пней и корней (графа 27)> = <объем пней и корней в плотной мере (графа 20)>*< объемный вес древесины (графа 24)>;

14) The total weight of the removed waste (felling residues):<вес вывозимого отхода (графа 28)> = <вес стволов (графа 25)> + <вес сучьев и ветвей (графа 26)>+<вес пней и корней (графа 27)>

Thus, the proposed methodology makes it possible to calculate the volume (both full and stock) and the mass of felling residues with differentiation by the type of waste based on the initial data of the inventory, as well as to estimate the required volume of storage bins or vehicle bodies and the number of car trips for their export.

K. Nikonenko

It makes no sense to perform the same calculations several times if the initial data does not change. A rounded log with a diameter of 20 cm and a length of 6 meters will always have the same volume, regardless of who is counting in which city. Only the formula V = πr²l gives the correct answer.

How to calculate the volume of a forest

Therefore, the volume of one OTSB will always be V = 3.14 × (0.1) ² × 6 = 0.1884 m³. In practice, in order to exclude the moment of carrying out standard calculations, cubatures are used. Such useful and informative tables are created for different types lumber. They help to save time and find out the cubic capacity of round timber, boards, OCB, timber.

  1. Roundwood cubicle
  2. How to use the table?
  3. Cubic capacity of products of different sizes

What is a cubicle box?

The name of this construction guide due to the fact that volume as a physical quantity is measured in cubic meters (or cubic meters). For a simpler explanation, they say "cubature", respectively, the table was called "cubature". This is an ordered matrix, which contains data on the volume of one product for various initial parameters. The base column contains sections, and the row contains the length (molding) of the material. The user just needs to find the number located in the cell at their intersection.

Consider specific example- a cubicle of round wood. It was approved in 1975 and is called GOST 2708-75, the main parameters are diameter (in cm) and length (in meters). It is very simple to use the table: for example, you need to determine the V of one log with a diameter of 20 cm and a length of 5 m. At the intersection of the corresponding row and column, we find the number 0.19 m³. A similar cubicle for round timber exists according to a different standard - ISO 4480-83. Reference books are very detailed with a step of 0.1 m, as well as more general, where the length is taken in 0.5 m increments.

Little secrets

The very use of the cubature is not difficult, but the main nuance is the correct data. Round wood is not a cylinder, but a truncated cone, in which the lower and upper cuts differ. One of them may be 26 cm, and the other - 18. The table assumes an unambiguous answer for a specific section.

Various sources suggest doing in two ways: to calculate the average value and take the volume from the reference book for it, or take the size of the upper cut as the main section. But if the tables were compiled according to certain standards, then they must be used according to the accompanying instructions. For a cubic meter GOST 2708-75, the diameter of the upper cut of the log is taken. Why is the raw data point so important? Because with a length of 5 meters for Ø18 cm we get 0.156 m³, and for Ø26 cm - 0.32 m³, which is actually 2 times more.

Another nuance is the correct cubes. If in the GOST 2708-75 table, complex formulas for truncated cones were used, calculations were carried out, and the results were rounded to thousandths, then modern companies that make up their own cubic meters take liberties. For example, instead of 0.156 m³ there is already a number of 0.16 m³. Often, openly erroneous cubes are posted on Internet sites, in which the volume of a log 5 meters long with a diameter of 18 cm is indicated not 0.156 m³, but 0.165 m³. If a company uses such directories, selling round timber to consumers, then it makes a profit, actually deceiving customers.

After all, the difference per item is significant: 0.165-0.156 = 0.009 or almost 0.01 m³.

The main problem of round timber is a different section. Sellers offer to resolve issues with calculations in the following ways:

  • calculating the volume of each unit and summing the obtained values;
  • storage method;
  • finding the average diameter;
  • method based on wood density.

It must be said right away that the first of these options gives the correct results. Only the calculation of the volume of each log and the subsequent addition of the numbers guarantees that the buyer pays for the timber he receives from the company. If the length is the same, then it is enough to find the cross-sectional areas of all the trunks, add them, and then multiply by the length (in meters).

2. Warehousing method.

It is assumed that the stored round timber occupies a part of the space in the form of a rectangular parallelepiped. In this case, the total volume is found by multiplying the length, width and height of the figure. Considering that there are voids between the folded trunks, 20% is subtracted from the resulting cubic capacity.

The downside is the acceptance as an indisputable fact that wood occupies 80% of the total space. After all, it may well happen that the bars are not neatly folded, thereby the percentage of voids is much higher.

3. Density based method.

In this case, you need to know the mass of the forest and the density of the wood. Cubature is easily found by dividing the first number by the second. But the result will be very imprecise, since a tree of the same type has different density... The indicator depends on the degree of maturity and moisture.

4. Averaged method.

If the trunks of harvested trees are on appearance almost identical, then choose any 3 of them. The diameters are measured, and then the average is found. Further, according to the cubature, the parameter for 1 product is determined and multiplied by the right amount... Let the results show: 25, 27, 26 cm, then the average is considered to be Ø26 cm, since (25 + 26 + 27) / 3 = 26 cm.

Considering the disadvantages of the considered methods, the only the right way for calculating the cubic capacity, one can consider finding the volume of each log using a cubic meter GOST 2708-75 or ISO 4480-83 and summing up the data obtained.

Calculation of the cubic capacity of lumber - count correctly

In the process of building structures made of wood, various lumber is purchased.

When buying or selling it, it becomes necessary to measure it. All the complexity of measuring lumber due to its inconsistent and custom size and shape, weight and quality. Due to the factors mentioned above, it is also impossible to sell such a product by piece. Make it right calculation of the cubic capacity of lumber It is very difficult for a non-specialist, and even the regulatory authorities are sometimes not able to check whether the calculation is correct.

Some sawn timber from the manufacturer is supplied in packages with an indication of the exact volume and value. But this practice is quite rare. In addition, consumers may have doubts about the correctness of calculating the cubic capacity of lumber, as well as about the indicated price. An ordinary buyer does not always know that in addition to cubic capacity, the cost of lumber depends on the degree of their processing, that is, non-edged or edged board, wood species and grade. In addition, the cost of boards up to 1.7 m long is lower than the cost of longer boards. The quality of the lumber produced is regulated by great amount rules and regulations, technical conditions and others normative documents, which individual developers do not even suspect, at the same time sellers of sawn timber are in no hurry to familiarize their buyers with the rules for the sale of sawn timber. To have at least general idea about how the calculation of the cubic capacity of lumber is made, it will not be superfluous to familiarize yourself with the rules for measuring some of their most common types.

According to the current regulations, the slab must be sorted, depending on the length, into two groups - up to two meters and over two meters. The croaker is stacked, alternating between thick and thin ends, as well as a crooked surface. The stacks should be of the same height along their entire length, right angles, they must be stacked as tightly as possible. Then, multiplying the width, length and height of the package, you get the folded cubic capacity.

Calculation of the volume of round timber

Thickness
in the upper
cut, see		 Volume m³, length, m.
1 1,5 2 2,5 3 3,5 4 4,5 5 5,5 6
14 0,016 0,025 0,035 0,043 0,052 0,061 0,073 0,084 0,097 0,110 0,123
16 0,021 0,035 0,044 0,056 0,069 0,082 0,095 0,110 0,124 0,140 0,155
18 0,027 0,041 0,056 0,071 0,086 0,103 0,120 0,138 0,156 0,175 0,194
20 0,033 0,051 0,069 0,087 0,107 0,126 0,147 0,170 0,190 0,210 0,23
22 0,040 0,062 0,084 0,107 0,130 0,154 0,178 0,200 0,230 0,250 0,28
24 0,048 0,075 0,103 0,130 0,157 0,184 0,210 0,240 0,270 0,300 0,33
26 0,057 0,089 0,123 0,154 0,185 0,210 0,250 0,280 0,320 0,350 0,39
28 0,067 0,104 0,144 0,180 0,220 0,250 0,290 0,330 0,370 0,410 0,45
30 0,077 0,119 0,165 0,200 0,25 0,29 0,33 0,38 0,42 0,47 0,52
32 0,087 0,135 0,190 0,230 0,28 0,33 0,38 0,43 0,48 0,53 0,59
34 0,100 0,150 0,210 0,260 0,32 0,37 0,43 0,49 0,54 0,60 0,66
36 0,110 0,170 0,230 0,290 0,36 0,42 0,48 0,54 0,60 0,67 0,74
38 0,120 0,190 0,260 0,320 0,39 0,46 0,53 0,60 0,67 0,74 0,82
40 0,14 0,21 0,28 0,36 0,43 0,50 0,58 0,66 0,74 0,82 0,90
42 0,15 0,23 0,31 0,39 0,47 0,56 0,64 0,73 0,81 0,90 1,0
44 0,16 0,25 0,34 0,43 0,52 0,61 0,70 0,80 0,89 0,99 1,09
46 0,18 0,27 0,37 0,47 0,57 0,67 0,77 0,87 0,94 1,08 1,19
48 0,19 0,30 0,41 0,51 0,62 0,73 0,84 0,95 1,06 1,18 1,30

Volume of 10 m of coniferous wood beams, m³

Width, mm Thickness, mm
50 60 75 100 130 150 180 200 220 250
130 0,065 0,078 0,0975 0,13
150 0,075 0,09 0,0113 0,15 0,195 0,225
180 0,09 0,108 0,0135 0,18 0,234 0,27 0,324
200 0,1 0,12 0,015 0,2 0,26 0,3 0,4
220 0,11 0,132 0,0165 0,22 0,395 0,434
250 0,125 0,15 0,188 0,25 0,5 0,625

In the woodworking industry, there are concepts of folding and dense cubic meter. In the price list for sawn timber, they are indicated for the volume in a dense mass, therefore, the cubic meters must be converted to a dense mass. For this, special conversion factors are used. For example, for a slab with a length of up to two meters, a coefficient of 0.48 is used, and for a slab with a length of more than two meters - 0.43.

There are two ways to determine the volume of sawn softwood and hardwood. Either by measuring each unit of material, or using a special standard, or a cubic meter established by GOST and designed to determine the volume edged lumber deciduous and conifers... The standard contains a table of one unit of lumber and a table of the volume of a meter, based on which you can calculate the cost of lumber.

When calculating the cubic capacity of non-edged sawn timber, slightly different rules apply.

How to accurately calculate the cubic capacity of a log?

The specificity of their measurement lies in the fact that the width of one-sided edged and non-edged boards is calculated as half the width of two layers - narrow and wide, which are measured in the middle of the board. The volume of round timber is calculated based on the measurements of each log. Dense cubic meters of logs are calculated using the corresponding GOST, which indicates the volume of round timber. These volumes are measured along the length of the log and the thickness of the top end.

The table we offer shows calculation of lumber cubic capacity: edged and unedged boards, floor boards, bars, beams, lining and slats. Using the table, you can calculate the amount of lumber in 1 m3.

The size The volume of one board (bar) Quantity in 1m3
Beams
100x100x6 0.06 cube 16.67 pieces
100x150x6 0.09 cube 11.11 pieces
150x150x6 0.135 cube 7.41 pieces
100x200x6 0.12 cube 8.33 pieces
150x200x6 0.18 cube 5.56 pieces
200x200x6 0.24 cube 4.17 pieces
100x100x7 0.07 cube 14, 28 pieces
100x150x7 0.105 cube 9.52 pieces
150x150x7 0.1575 cube 6.35 pieces
100x200x7 0.14 cube 7.14 pieces
150x200x7 0.21 cube 4.76 pieces
200x200x7 0.28 cube 3.57 pieces
Edged board
22x100x6 0.0132 Cubes 45.46 sq.m.
22x150x6 0.0198 cube 45.46 sq.m.
22x200x6 0.0264 Cubes 45.46 sq.m.
25x100x6 0.015 cube 40 sq.
25x150x6 0.0225 cube 40 sq.
25x200x6 0.03 cube 40 sq.
40x100x6 0.024 cube 25 sq.
40x150x6 0.036 cube 25 sq.
40x200x6 0.048 cube 25 sq.
50x100x6 0.03 cube 20 sq.
50x150x6 0.045 cube 20 sq.
50x200x6 0.06 cube 20 sq.
32x100x6 0.0192 Cubes 31.25 sq.
32x150x6 0.0288 cube 31.25 sq.
32x200x6 0.0384 Cubes 31.25 sq.
25x100x2 0.005 cube 40 sq.
25x100x7 0.0175 cube 40 sq.
25x150x7 0.02625 cube 40 sq.
25x200x7 0.035 cube 40 sq.
Unedged board
50x6 0.071 1 cube
40x6 0.05 1 cube
25x6 0.0294 1 cube
Rail
22x50x3 0.0033 cube 909 rm
25x50x3 0.00375 cube 800 rpm
22x50x2 0.0022 cube 909 rm
25x50x2 0.0025 cube 800 rpm
Bar
40x40x3 0.0048 cube 624.99 rpm
50x50x3 0.006 cube 500.01 rpm
40x80x3 0.0096 cube 312.51 m.p.
50x50x3 0.0075 cube 399.99 rpm
Floor board
36x106x6 0.0229 cube 27.77 sq.m.
36x136x6 0.0294 Cubes 27.77 sq.m.
45x136x6 0.0375 cube 21.74 sq.m.
Lining
16x88x6 0.0084 cube 62.5 sq.m.
16x88x3 0.0042 cube 62.5 sq.m.
12.5x90x3 0.0034 cube 80 sq.

The purpose of this article is to explain to you how to correctly calculate the area of ​​\ u200b \ u200bthe walls of log houses, baths and other buildings, as well as buildings from glued and profiled beams. Many will say - What is there to explain and so everything is clear - you just need to know the basics of geometry.

Roundwood cubes - how to calculate the volume?

Quite right - you can't do without geometry, but this dimension has its own peculiarity, unlike walls made of timber and other materials, but more on that below.

Why you need to know how the area of ​​log cabins is calculated:

  • will help to more accurately calculate the cost and amount of required material *
  • calculate independently the cost of painting and polishing log cabins

To calculate the area of ​​\ u200b \ u200bthe walls, we all know that we must know two quantities - the height and the length, and for a complete calculation, the area also of the ends
S = Pi * R2 - area of ​​1 circle (end),where
Pi — 3,1428
R- end radius
Knowing the area of ​​one end, we multiply this value by the number of ends and get the total area of ​​the ends.
Main feature log structures is that the logs have a convex shape, so the height measured as usual - from floor to ceiling will differ from the actual one by 10-15%.

photo # 1
photo # 2

We calculate the area.

To measure the height of one log, you just need to take a tape measure and set it aside from the top seam to the bottom seam of the crown as shown in photo # 1(To measure the height of a log house from a chopped log, an average value is taken). And at the timber you need to measure the width of the edges and add it to the value A(arrows shown in photo # 2). We will get the real height of one log or bar, and knowing the number of crowns, we get the real height of the wall (number of crowns * height of one crown). I think you shouldn't remind me of the formula for the area of ​​a rectangle. It's that simple.


Photo # 4.

And so, adding up all the data - the area of ​​the walls, "triangles", ends, and from the sum obtained, subtract the area of ​​the window and doorways- we will receive the full area of ​​the building and already based on these data we will be able to independently calculate (knowing the price of work per m2) the cost of work, materials *, as well as their volume * (by sending them to the company manager by phone or by arriving at the office) **.

Finally, I will give little advice, if by measuring the structure of a simple form everything is simple and does not make much work and does not require much time, but what about complex forms like on photo # 4.


photo # 4

I'll tell you straight - measure yourself or be present at the measurements when your employees do it, by this you will avoid deception by unscrupulous construction crews or contact trusted companies.

* the cost and volume of the required material (coating) is influenced by the condition of the wood (sanded, not sanded) and the coating method (brush, roller, spray)

** for your convenience, on our website, the cost of materials is calculated for 1m2

Still have questions? Call

(A. Sokolov, Terem Grad)

This question is the most relevant when it comes to building a house from a log. How can you calculate the volume of a house yourself? How to check the declared cubes of the forest in the estimate from the developer?

Here is a table showing the volume of roundwood depending on the diameter of the log. These calculations are given in accordance with GOST 2708-75, which has been in effect on the territory of the Russian Federation since 1975. The table allows you to calculate how many cubes of round wood will be required to build a house from a log from a manufacturer.

The standard length of the logs used for the construction of log cabins is 6 meters. Billets of this length are used most often. Logs longer than 6 meters are used for the production of houses manual felling very rarely.

Most often, the architect will optimize the log house according to the cutting plan in such a way as to avoid (or minimize) the use of lengths. It is technically impossible to produce a rounded log over 6 meters.
The table below shows a cubicle of round wood, and for your convenience, we have made a backlight for a column of 6-meter blanks.

Table for calculating the cubic capacity of round wood with a diameter of 10 to 100 cm and a length of 3 to 8 meters

3.5 m 4 m 4.5 m 5 m 5.5 m 6 m 6.5 m 7 m 7.5 m 8 m
0,026 0,031 0,037 0,044 0,051 0,058 0,065 0,075 0,082 0,09 0,1
D 11 cm 0,032 0,037 0,045 0,053 0,062 0,07 0,08 0,09 0,098 0,108 0,12
D 12 cm 0,038 0,046 0,053 0,063 0,073 0,083 0,093 0,103 0,114 0,125 0,138
D 13 cm 0,045 0,053 0,062 0,075 0,085 0,097 0,108 0,12 0,132 0,144 0,158
D 14 cm 0,052 0,061 0,073 0,084 0,097 0,11 0,123 0,135 0,15 0,164 0,179
D 15 cm 0,06 0,071 0,084 0,097 0,11 0,125 0,139 0,153 0,169 0,182 0,199
D 16 cm 0,069 0,082 0,095 0,11 0,124 0,14 0,155 0,172 0,189 0,2 0,22
D 17 cm 0,077 0,092 0,107 0,124 0,14 0,157 0,174 0,191 0,209 0,225 0,25
D 18 cm 0,086 0,103 0,12 0,138 0,156 0,175 0,194 0,21 0,23 0,25 0,28
D 19 cm 0,097 0,115 0,134 0,154 0,173 0,193 0,212 0,235 0,255 0,275 0,305
3.0 m 3.5 m 4.0 m 4.5 m 5.0 m 5.5 m 6.0 m 6.5 m 7.0 m 7.5 m 8.0 m
D 20 cm 0,107 0,126 0,147 0,17 0,19 0,21 0,23 0,26 0,28 0,3 0,33
D 21 cm 0,119 0,14 0,163 0,185 0,21 0,23 0,255 0,285 0,31 0,335 0,365
D 22 cm 0,134 0,154 0,178 0,2 0,23 0,25 0,28 0,31 0,34 0,37 0,4
D 23 cm 0,114 0,169 0,194 0,22 0,25 0,275 0,305 0,335 0,37 0,4 0,435
D 24 cm 0,157 0,184 0,21 0,24 0,27 0,3 0,33 0,36 0,4 0,43 0,47
D 25 cm 0,171 0,197 0,23 0,26 0,295 0,325 0,36 0,395 0,43 0,465 0,505
D 26 cm 0,185 0,21 0,25 0,28 0,32 0,35 0,39 0,43 0,46 0,5 0,54
D 27 cm 0,203 0,23 0,27 0,305 0,345 0,38 0,42 0,46 0,495 0,54 0,585
D 28 cm 0,22 0,25 0,29 0,33 0,37 0,41 0,45 0,49 0,53 0,58 0,63
D 29 cm 0,235 0,27 0,31 0,355 0,395 0,44 0,485 0,525 0,57 0,62 0,675
3m 3.5 m 4 m 4.5 m 5 m 5.5 m 6 m 6.5 m 7 m 7.5 m 8 m
D 30 cm 0,25 0,29 0,33 0,38 0,42 0,47 0,52 0,56 0,61 0,66 0,72
D 31 mm
0,265 0,31 0,355 0,405 0,45 0,5 0,555 0,6 0,655 0,72 0,77
D 32 cm 0,28 0,33 0,38 0,43 0,48 0,53 0,59 0,64 0,7 0,76 0,82
D 33 cm 0,3 0,35 0,405 0,46 0,51 0,565 0,625 0,68 0,74 0,805 0,87
D 34 cm 0,32 0,37 0,43 0,49 0,54 0,6 0,66 0,72 0,78 0,85 0,92
D 35 cm 0,34
 0,395 0,455 0,515 0,57 0,635 0,7 0,76 0,83 0,9
 0,97
D 36 cm 0,36 0,42 0,48 0,54 0,6 0,67 0,74
 0,8 0,88 0,95 1,02
0,375
 0,44 0,505 0,57 0,635 0,705 0,78 0,85 0,925 1,0 1,075
D 38 cm 0,39
 0,46 0,53 0,6 0,67 0,74 0,82 0,9 0,97
 1,05 1,13
D 39 cm 0,41
 0,48 0,555 0,63 0,705 0,78 0,86 0,945 1,02 1,105 1,19
3m3.5 m4 m4.5 m5 m5.5 m6 m6.5 m7 m7.5 m8 m
0,43
 0,5 0,58 0,66 0,74 0,82 0,9 0,99 1,07 1,16 1,25
D 41 cm 0,45 0,53 0,61 0,695 0,775 0,86 0,95 1,035 1,125 1,22 1,315
D 42 cm 0,47
 0,56 0,64 0,73 0,81 0,9 1,0 1,08 1,18 1,28 1,38
D 43 cm 0,495
 0,585 0,67 0,765 0,85 0,945 1,045 1,14 1,24 1,34 1,34
D 44 cm 0,515
 0,61 0,7 0,8 0,89 0,89 1,09 1,2
 1,3
 1,4 1,51
D 45 cm 0,543
 0,64 0,735 0,835 0,935 1,035 1,14 1,25 1,355 1,465 1,48
D 46 cm 0,57
 0,67 0,77 0,87 0,98 1,08 1,19 1,3 1,41 1,53 1,65
D 47 cm 0,595
 0,7 0,805 0,91 1,02 1,13 1,245 1,355 1,475 1,6 1,725
D 48 cm 0,62
 0,73 0,84 0,95 1,06 1,18 1,3 1,41 1,54 1,167 1,8
D 49 cm 0,645
 0,76
 0,875 0,99 1,105 1,23 1,355 1,475 1,605 1,74 1,875
3m3.5 m4 m4.5 m5 m5.5 m6 m6.5 m7 m7.5 m8 m
D 50 cm 0,67
 0,79 0,91 1,03 1,15 1,28 1,41 1,54 1,67 1,81 1,95
D 51 cm 0,7
 0,825 0,95 1,075 1,2 1,335
 1,47 1,605 1,74 1,89 2,035
D 52 cm 0,73
 0,86 0,99 1,12 1,25 1,39 1,53 1,67 1,81 1,97 2,12
D 53 cm 0,765
 0,895 1,03 1,165
 1,3 1,445 1,59 1,735 1,885 2,045 2,205
D 54 cm 0,8
 0,93 1,07 1,21 1,35 1,5 1,65 1,8 1,96 2,12 2,29
D 55 cm 0,83
 0,97 1,115 1,26 1,405 1,56 1,715 1,875 2,035 2,2 2,375
D 56 cm 0,86
 1,01 1,16 1,31 1,46 1,62 1,78 1,95 2,11 2,28 2,46
D 57 cm 0,89
 1,045 1,205 1,36 1,515 1,68 1,875 2,015 2,19 2,365 2,545
D 58 cm 0,92
 1,08 1,25 1,41 1,57 1,74 1,91 2,08 2,27 2,45 2,63
D 59 cm 0,955
 1,12 1,29 1,46 1,625 1,8 1,98 2,155 2,345 2,535 2,72
3m3.5 m4 m4.5 m5 m5.5 m6 m6.5 m7 m7.5 m8 m
D 60 cm 0,99
 1,16 1,33 1,151 1,151 1,86 2,05 2,23 2,42 2,62 2,81
D 61 cm 1,025
 1,2 1,38 1,565 1,74 1,925 2,115 2,3 2,495 2,7 2,9
D 62 cm 1,06 1,24 1,43 1,62 1,8 1,99 2,18 2,37 2,57 2,78 2,99
D 63 cm 1,095
 1,285 1,475 1,67 1,855 2,05 2,25 2,445 2,65 2,865 3,08
D 64 cm 1,13
 1,33 1,52 1,72 1,61 2,11 2,32 2,52 2,73 2,95 3,17
D 65 cm 1,165
 1,365 1,565 1,77 1,965 2,17 2,38 2,59 2,805 3,03 3,275
D 66 cm 1,2
 1,4 1,61 1,82 2,02 2,23 2,44 2,66 2,88 3,11 3,38
D 67 cm 1,235
 1,445 1,655 1,87 2,075 2,29 2,505 2,735 2,965 3,21 3,485
D 68 cm 1,27
 1,49 1,7 1,92 2,13 2,35 2,57 2,81 3,05 3,31 3,59
D 69 cm 1,305
 1,53 1,75 1,97 2,19 2,415 2,645 2,89 3,14 3,41 3,695
3m3.5 m4 m4.5 m5 m5.5 m6 m6.5 m7 m7.5 m8 m
D 70 cm 1,34
 1,57 1,8 2,02 2,25 2,48 2,72 2,97 3,23 3,51 3,8
D 71 cm 1,375
 1,615 1,85 2,08 2,315 2,55 2,795 3,055 3,325 3,615 3,91
D 72 cm 1,41
 1,66 1,9 2,14 2,38 2,62 2,87 3,14 3,42 3,72 4,02
D 73 cm 1,45
 1,705 1,955 2,2 2,45 2,695 2,95
 3,23 3,52 3,82 4,135
D 74 cm 1,49
 1,75 2,01 2,26 2,52 2,77 3,03 3,32 3,62 3,92 4,25
D 75 cm 1,53
 1,8 2,065 2,325 2,595 2,845 3,115 3,415 3,715
 4,03 4,365
D 76 cm 1,57
 1,85 2,12 2,39 2,67 2,92 3,2 3,51 3,81 4,14 4,48
D 77 cm 1,615
 1,9 2,18 2,455 2,745 3,0 3,29 3,605 3,925 4,255 4,6
D 78 cm 1,66
 1,95 2,24 2,52 2,82 3,08 3,38 3,7 4,04 4,37 4,72
D 79 cm 1,7
 2,0 2,295 2,59 2,895 3,16 3,475 3,8 4,15 4,485 4,835
3m3.5 m4 m4.5 m5 m5.5 m6 m6.5 m7 m7.5 m8 m
D 80 cm 1,74
 2,05 2,35 2,66 2,97 3,24 3,57 3,9 4,26 4,6 4,95
D 81 cm 1,785
 2,1 2,41 2,73 3,05 3,325 3,66 4,005 4,365 4,51 5,085
D 82 cm 1,83
 2,15 2,47 2,8 3,13 3,41 3,75 4,11 4,47 4,82 5,22
D 83 cm 1,875
 2,205 2,53 2,87 3,205 3,495 3,845 4,215 4,585 4,495 5,345
D 84 cm 1,92 2,26 2,59 2,94 3,28 3,58 3,94 4,32 4,7 5,07 5,47
D 85 cm 1,965
 2,315 2,65 2,985 3,34 3,675 4,035 4,43 4,82 5,195 5,595
D 86 cm 2,01
 2,37 2,71 3,03 3,4 3,77 4,13 4,54 4,94 5,32 5,72
D 87 cm 2,06
 2,425 2,78 3,13 3,5 3,86 4,235 4,655 5,06 5,445 5,86
D 88 cm 2,11
 2,48 2,85 3,23 3,6 3,95 4,34 4,77 5,18 5,57 6,0
D 89 cm 2,16
 2,535 2,915 3,3 3,685 4,045 4,45 4,88 5,3 5,7 6,135
3m3.5 m4 m4.5 m5 m5.5 m6 m6.5 m7 m7.5 m8 m
D 90 cm 2,21
 2,59 2,98 3,37 3,77 4,145 4,56 4,99 5,42 5,83 6,27
D 91 cm 2,255
 2,65 3,045 3,45 3,45 4,24 4,67 5,105 5,545 5,96 6,41
D 92 cm 2,3
 2,71 3,11 3,53 3,94 4,34 4,78
 5,22 5,67 6,09 6,55
D 93 cm 2,355
 2,77 3,18 3,605 4,025 4,43 4,89 5,345 5,795 6,225 6,69
D 94 cm 2,41
 2,83
 3,25 3,68 4,11 4,52 5,0 5,47 5,92 6,36 6,83
D 95 cm 2,46 2,89 3,32 3,76 4,2 4,625 5,11 5,58 6,045 6,495 6,975
D 96 cm 2,51
 2,95 3,39 3,84 4,29 4,73 5,22 5,69 6,17 6,63 7,12
D 97 cm 2,565
 3,01 3,46 3,92 4,38 4,83 5,335 5,81 6,3 6,77 7,28
D 98 cm 2,62
 3,07 3,53 4,0 4,47 4,93 5,45 5,93 6,43 6,91 7,44
D 99 cm 2,67
 3,135 3,6 4,085 4,56 5,035 5,565 6,06 6,565 7,055 7,585
D 100 cm 2,72
 3,2 3,67 4,17 4,65 5,14 5,68 6,19 6,7 7,2 7,73

How is the cubic capacity of a wooden house calculated in the preliminary calculation?

First you need to calculate how many blanks are needed to build a house from a log. V finished projects from "ABC OF THE FOREST" this information is contained in the section "Cutting cards". The photo below provides a summary of the construction information.

This data is for a rounded log with a diameter of 240 mm and a length of 6 meters. We see from the cutting map that for construction we need 547 blanks, when converted to Cubic Meters according to the table above, 146.71 m3 is obtained. These data are automatically calculated by the AT-VENTSY program.

The program, in which our architects design wooden houses, gives an exact cubic capacity without window and door openings, taking into account all design features wooden house... It is almost impossible to achieve such accuracy with manual calculation.

547 * 0.33 = 180.51 m3.

Thus, we got the result taking into account the lunar groove - the log, relatively speaking, is counted as a cylinder, and the program counts minus the lunar groove.

This calculation once again proves the importance of a professional project and the availability of cutting maps, which allow you to very accurately calculate the amount of logs and lumber and rationally use the construction budget. But for approximate calculations, in order to understand the order of prices, this method is very informative.

Mathematical method for calculating the volume of a wooden house (with a practical example)

What to do if you liked the house in the picture, and you do not have a complete project, much less a cutting map? In this case, you need to be patient and manually calculate the length of all the logs according to the plan. It must be understood that in this case the error with the real result can be significant, and in both directions.

The task is to calculate how many blanks are needed to build a house from a log. The standard length of a log, as we have already informed you, often does not exceed 6 meters. It is very important at this stage to decide on the height of the floors! And according to this, calculate the number of crowns.

To do this, we need a table of the height of the log profile depending on the diameter. It is presented below. We calculate the length of all the crowns (logs), including the pediments, and divide the resulting number by 6.

Round log profile height
Log diameter, mm Crown height, m Rim height, mm
220 0,1905 190,5
240 0,2078 207,8
260 0,2252 225,2
280 0,2425 242,5
300 0,2598
259,8
320 0,2771 277,1
340 0,2944 294,4
360 0,3225 322,5
380 0,3399 339,9
400 0,3572 357,2

EXAMPLE:

Suppose we want to build a house from a chopped log with a diameter of 320 mm. One full floor, the second floor is an attic. The desired height of the first floor after shrinkage is 3100 mm, the desired height of the attic against the wall is 1500 mm. The height of one crown with a diameter of 320 mm is 0.2771 mm.

Important! The average height of the first floor of any log house before shrinkage is 3.2 m, the height of the attic wall in the attic is on average 1.5-1.7 m.After shrinkage, the height of the walls will decrease by about 7-10%, so this must be taken into account in the initial calculations ... It is also necessary to take into account the composition of the floor of the first and second floors. A competent architect will always tell you how to do it correctly.
So in our example:
  • First floor before shrinkage: 12 crowns, which will be equal to 3.33 m.
  • Attic wall in the attic before shrinkage: 6 crowns, which is equal to 1.66 m.

Now we need the length of the walls of each floor. To do this, it is necessary to calculate the perimeter of all walls (load-bearing and internal) according to the plan.

Suppose that the length of the first floor is 100 linear meters, and the length attic floor amounted to 85 mpThis is the result without deducting window and door openings. If you need a more accurate number, then you need to calculate all the openings in length and height and subtract from the total number.

We will consider a more simplified version of calculating the volume of a house from a log from the manufacturer.

So,
  • First floor 100 m * 12 crowns = 1200 m.
  • Attic floor 85 m * 6 crowns = 510 lm
So, the total length of the walls: 1200 + 510 = 1710 lm.

Thus, we obtained the total length of only the walls, excluding gables, balconies, terraces, vertical support pillars, log trusses and other elements that may be included in the project of the house.

Important! To the resulting cubic capacity, you need to add 5%, which will fall on curly logs and ridge logs. The exact number depends on the diameter of the log, the cutting method. For approximate calculations, we will limit ourselves to 5%.
So, we divide the resulting length by 6 meters and we get 1718/6 = 286.33 pcs. Thus, for the construction of walls in our log house, 287 blanks are required. We multiply this number by 0.59 (data from the "Table for calculating the volume of round timber") and we get169.33 m3.

We need to add pediments to the resulting cubic capacity. Them in the very simple case 2, they are triangular. The area of ​​2 triangles will be approximately equal to the area of ​​the rectangle. Therefore, we consider the length of one wall, where the pediment is. Multiply by the number of crowns and get the length of the log in both gables. Divide the result by 6.

Important! The sum of the attic crowns and gables is equal to the height of the first floor. Therefore, if we have the number of crowns on the first floor equal to 12, and in the attic there are 6 crowns, then there will be 6 crowns in the pediments (12–6 = 6).
Suppose that the length of the pediment is 11 meters, we have 6 crowns. So, 11 * 6 = 66 m. Divide by 6, we get 11 pieces. 11 * 0.59 = 6.49 m3

Thus, the cubic capacity of our house made of a log with a diameter of 320 mm is 169.33 + 6.49 = 175.82 m3. When rounding, we got 176 m3.

It was possible to go from the opposite, first to count the number of all blanks, and then convert to cubic meters. Let's check our result in this way:

287 (blanks for walls) + 11 (blanks for gables) = 298 * 0.59 = 175.82 m3, rounded, 176 m3.

That is, everything is calculated correctly.

Important! Do not forget that this is not the final result yet. It is necessary to study the sketch and if there are terraces, balconies and vertical pillars, they must be added to the total... We calculate it manually, since our calculation is mathematical. For example, if there are pillars, then each pillar is counted as one 6-meter workpiece of the required diameter. We also consider the fence for the terrace, cuttings, chopped trusses and other elements.

Now you know how to calculate the cubic capacity of a log house or a log house. If you do NOT want to deal with complex calculations yourself, please contact our specialists! We will make a detailed estimate for you. This is a free service and does not bind you to anything.

When ordering a project of a house made of rounded logs, all lumber will be automatically calculated as accurately as possible.

Finished projects of houses and baths from "AZBUKI LESA" are presented in ours.

To get an estimate, send the plan of your future home to

In the letter, indicate the desired diameter of the log, the estimated height of each floor, construction technology and other data that the manager needs to know in order to draw up an accurate estimate.

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