Round forest (round timber, sawlog) is a mechanically processed tree trunk, from which branches, twigs, and also the thin top have been completely removed.
A rounded log is a log processed using a milling cutter, on which the bark, branches and top loose layer of wood have been completely removed, and a uniform diameter has been established throughout. Since during processing almost the entire surface protective layer of wood is removed from the trunk, the material is more susceptible to rotting and the appearance of parasites, therefore mandatory treatment with antiseptics is required. Also, according to GOST 9463-88, rot, tobacco knots, wormholes and mechanical damage with a depth of 0.1 of the diameter are not allowed on the products.
Our roundwood cubature calculator allows you to calculate the cubic capacity and weight of lumber using the known parameters of length, width, diameter and tree species. Additionally, the calculator calculates the total cost based on a known price per cubic meter (m3). The service can also perform a reverse calculation and determine the total volume of products by the number of pieces. If you need to calculate round timber of different diameters, to get an approximate calculation, add up the diameters of the opposite ends and divide by two. To start the calculation, click the “ Calculate ” button, and if you want to use only the tables, click here.
Why do you need to calculate cubic capacity?
Payment for logs is made per cubic meter.
The concept of cubic capacity means the volume of wood expressed in cubic meters.
The value used by experts is:
- to calculate the amount of round timber during the construction of log houses from rounded and unprocessed lumber;
- suppliers when selling timber to your home;
- suppliers when selling firewood.
Payment for timber is made for each cubic meter, so you need to be able to calculate the number of logs in a cube. This way you won’t have to overpay for extra material. When calculating , measure the perimeter of the structure and be sure to take into account the protrusions of the logs at the corners (paws) .
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Calculation in cubes is needed to determine the amount of building materials for the construction of a house, bathhouse, and other buildings. The material is also taken into account for the construction of internal walls and partitions, gables. Additionally, the usable area, the number of crown rows are calculated, and the diameter of the logs is taken.
The first method is the simplest and most approximate
This method is to measure the volume of space where the building material is located. As a rule, this is a warehouse or barn, a woodpile or the body of a truck, other containers are conventionally rectangular in shape. And in order to calculate the volume of a log in a certain room, you need:
- Measure the volume of this space (cubic). To do this, we measure the width, length and height of the storage or transportation space. We multiply the measured dimensions. The result will be the volume.
- Of course, you should take into account: logs stored, for example, indoors, or transported in a truck, will not take up all the space; layers form between them, and they should be excluded from the calculated volume. Experts say: such segments can occupy up to 20 percent of the total space. Accordingly, 80 will be taken by the wood itself. That is, the void coefficient used in this formula will be 0.8. To calculate the cubic capacity of a log, it will be necessary to: multiply the volume of the warehouse by the corresponding coefficient (0.8). The resulting numbers will be the cubic capacity of the log we need.
Methods for calculating volume
There are several ways to roughly calculate the cubic capacity of rounded logs. This requires the geometric dimensions of the building and mathematical formulas. The dimensions of building materials are measured with a tape measure, and the dimensions of the house are taken according to the plan (project).
Builders, sellers and developers use several methods to calculate the cubic capacity of a log:
- household method;
- using special tables;
- with data substitution into formulas;
- using an online calculator.
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Thicker walls will increase the overall cubic capacity, and thin ones will not retain heat in the house. Therefore, it is necessary to recalculate the volume of timber several times, taking into account the cost and thermal performance of a wall of a certain section.
Domestic
Needed to find out the total cost of materials for building a house. It is taken into account that thick logs are more expensive in total cubic capacity, but such a structure will not require additional thermal insulation. In buildings made of stone and concrete, the total volume of the walls is determined, and in log buildings - the amount of round timber.
Calculation procedure:
- take the diameter of lumber, usually take 26 cm;
- determine the height of the log house, most often the value is 2.4 - 3.0 meters per floor;
- calculate the number of logs for each wall, then add up the indicators;
- find the number of logs for the internal walls in a similar way.
Next, you need to find the volume of one element, then the resulting value is multiplied by the quantity for the entire house. This is how the total volume of timber to be purchased is found.
Different walls (inside and outside the building) will require different diameters of building materials. The volume is calculated for each type of element (even if there are several of them), then the resulting values are added, and the total cubic capacity of the log per house is obtained.
Using tabular data
It is a simplified method, since half of the calculations do not have to be done. They use ready-made tables that indicate data on the cubic capacity of various log elements. There are separate registers for rounded, chopped, unedged materials.
Cubic capacity of rounded log:
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The cost is affected not only by the cross-sectional size, but also by the type of wood. For permanent residence, logs with a diameter of 240 - 250 mm are used, for the northern regions - more than 260 mm. For summer housing, a size of 200 - 220 mm is suitable, and the gazebo is made with material 150 - 180 mm.
By formulas
Sometimes proven formulas are used for calculations. Using one of these, the cross-sectional area S = πr² is found, where:
- π is a standard number equal to 3.14;
- r is the radius of the log squared.
For example, take a standard round log with a diameter of 240 mm, substitute the values into the formula: 3.14 · (0.12 m)2 = 0.0452 m². The resulting value must be multiplied by the length of the log as part of the wall, taking into account the intersection outlets. This length, for example, is taken to be 6 m.
Multiply: 0.0452 m² · 6 m = 0.27 m³. To find out the total volume of logs for the entire building, multiply 0.27 m³ by the number of elements in the log house. For example, there were 50 of them, so 0.27 m³ · 50 pieces. = 13.5 m³.
Using a calculator
Such calculation methods are available on many websites of construction companies that sell timber or build log cabins. There are proposals developed in the form of a standard project, where you can calculate the amount of material and change the thickness of the walls.
How to use the online calculator:
- to begin with, enter the general dimensions of the building (outer walls) and the radius of the round timber into the appropriate columns or windows;
- when constructing walls in a “bowl” or “claw”, add 0.5 m to the length of the element for accurate calculation; when assembling using the “half-hook” method, nothing is added;
- The procedure for entering parameters is repeated for internal partitions and walls, taking into account that the cross-section for these structures is already different.
After clicking the button for calculation, data appears on the amount of timber required.
Example
The example concerns calculation using tables. The length of the external walls is determined, and the joining of the logs is taken into account. The height is determined by the amount of round timber to reach the required level under the roof. Don't forget about the gables. Next, they are determined by the size of the transverse diameter of the lumber. It turns out 60 logs 6 m long, 220 mm in diameter.
Determination order:
- the diameter value is found in the table, and on the contrary, the volume value for a diameter of 220 mm is tracked, the resulting value is 0.0466 m³;
- multiply 0.0466 m³ by 6 m to obtain the volume of the entire log: 0.0466 · 6 = 0.28 m³;
- multiply the cubic capacity of the element by their total number: 0.28 m³ · 60 pcs. = 16.8 m³.
How to calculate the volume of one log
Apply the formula to find the cross-sectional area through the diameter S = (d²: 4) π, where:
- S—sectional area;
- d² - diameter squared;
- π is a constant number equal to 3.14.
After finding the area, the result obtained is multiplied by the length of the element to obtain its volume.
Sometimes you need to know the cubic capacity of a log in order to calculate how many elements of such products are produced in one cube. To do this, 1 cubic meter is divided by the volume of one log. For example, 1: 0.28 m³, it turns out that there are 3.57 pieces per cubic meter (diameter 220 mm, length 6 m).
Using a cubeturner
The timber block is strictly regulated by GOST 2708-75 and is a matrix into which the volumes of round timber are inscribed depending on its geometric parameters. This table consists of rows and columns. The former contain information about the cross-section of the product, and the latter - about its length.
The table is very easy to use and significantly reduces the time of calculations. For example, you need to calculate the volume of a log whose length is 5 m and diameter is 25 cm. At the intersection of the corresponding column and row there is a number of 0.295 m³.
Recommendations from experts
The problem of how to calculate a log house for a house can be solved quite easily using the above material and formulas. But you shouldn’t delude yourself and talk about the obtained figures as specific ones - you’ll have to take into account window and door openings, but not immediately, in order to subtract them from the total, but accept them as a proper expense. Otherwise, it will turn out that the array will have to be purchased again.
There is also a risk of purchasing substandard raw materials - damage, knots, wormholes - all this will further affect the amount of money spent. Remember that even rich and wealthy clients cannot afford to throw money away, so they use the working rule - you cannot skimp on quality.
Calculation for a bath
To build your own steam room, you do not need to resort to the services of specialists - calculating the frame of a bathhouse yourself will not be difficult.
A typical 3x5 project will take a little time to construct and such a structure will consist of functional premises - nothing superfluous, but amenities are not lost.
- Steam room.
- Washing room.
- Waiting room.
Based on the wishes of everyone at home, the steam room and washing room can be combined. Thus, there is no need for one wall.
But you should take into account the health characteristics of all visitors to the bathhouse - perhaps someone cannot tolerate steam. And washing at a constant temperature is not a very pleasant experience even for avid lovers of the Russian bath.
Conclusion
Now you know how to choose the optimal diameter of a log for permanent residence, so that you feel cozy and comfortable in your home. But I would like to remind you that the building has many places that are sources of heat loss, even if you choose a log house of the required size. These elements include door and window openings, because a lot depends on the quality of the product!
In order for the house to be warm, you need to take into account a lot of specific points at the design stage: floor, walls, ceilings, basement (if any), openings
In the video presented in this article you will find additional information on this topic.
Optimal dimensions of logs
A wooden house outperforms its concrete and stone counterparts in all the most important parameters for housing:
- The ability to easily pass steam and air, which guarantees automatic adjustment of the optimal humidity level in the rooms.
- The lowest thermal conductivity, which means the house will be warm with minimal energy costs. In summer it will be pleasantly cool.
For your information! Wood fills the atmosphere of the house with a subtle, characteristic aroma that has a beneficial effect on human health. And lumber from coniferous trees has persistent antibacterial properties, purifies the air and surfaces of structures from pathogenic flora.
Protection from winds and frost for the house ensures the correct selection of lumber for the construction of a wooden frame. Today we will discuss choosing the optimal log diameter for a log house.
To the uninitiated, this question may seem far-fetched; what could be simpler, take a rounded log with a diameter of 400 or more, build it, it will be sound and warm. However, issues of energy saving and saving one’s own finances remain relevant for the vast majority of the population of our country.
In this regard, instructions for optimizing the purchase of wood for the construction of buildings for various purposes will be useful to many.
Advice! Those who intend to build with wood with their own hands should know the recommendations of professionals in this matter. And it is better to exercise control at a construction site if you know the basics of wooden construction.
