A simple online calculator for calculating a log house will indicate the exact number of logs in cubic capacity, meters and pieces for your wooden house. Start calculating now!
Openings of windows and doors are not taken into account in the calculator, since this does not reduce the cost of solid wood.
Log house, log house with your own hands
Wooden houses are the standard of environmental friendliness, therefore, they have been in high demand lately. Now more and more often there are houses made of rounded logs. A log house is just a "box" of a house consisting of logs, without a floor, lathing and a roof. It is best to use conifers, pine and spruce. Aspen is recommended for baths and wells, as it is a moisture resistant breed. Birch can not be used in any case, it quickly decays and is extremely capricious, but just right for a firebox. Special attention should be paid to drying solid wood. If the logs are not completely dried, then the logs of the house will begin to crack due to the temperature difference in the house and outside. Have patience, let the logs dry thoroughly, and then start assembling your log house.
The calculation of a rounded log for a house is extremely simple due to the high quality of the material, the stable geometry of each crown. Nevertheless, you will have to take into account a number of factors according to the recommendations of specialists. This will save you from unnecessary cutting waste when choosing a complex architecture, will allow you to select the minimum possible margin to reduce the construction budget. Calculation of the cubic capacity of rounded logs will allow you to reduce purchase costs, since lumber is more expensive per piece.
Features of cylindering when calculating the required volume
Calculation of cylindering for a cottage, a bath is based on several characteristics of the material:
- length - the standard is 6 m, although some manufacturers produce 4 m sawn timber, elements of crowns of non-standard length;
- diameter - at the design stage, it is important to take into account the presence of facades, climatic, operational features of the region.
For example, to calculate a cottage with the planned decoration of facades, you can lay in the project a smaller diameter of the elements, install a layer of insulation under the outer cladding. At the same time, the necessary strength of the power frame will be preserved, heat loss in the walls, the time frame, and the construction budget will decrease.
A feature of the rounded log is its profiling. The sampling of the longitudinal groove, corner bowls is carried out during the production process, which ensures the ideal geometry of the walls, reducing the consumption of inter-crown insulation (jute or tow).
In the framework of a one-story cottage, when choosing a different diameter of material, there will be an unequal number of crowns. To calculate their number independently, the standard ratios of the working height of the cylinder are used, depending on its diameter, the width of the longitudinal groove (cm):
- 22.5 - for Ø26 with groove 13;
- 20.8 - for Ø24 with a groove 12;
- 19.1 - for Ø22 with groove 11;
- 17.3 - for Ø20 with a groove 10;
- 15.6 - for Ø18 with groove 9.
For example, a 3-meter blockhouse made of rounded logs Ø240 mm will contain the following number of crowns:
3,000/208 = 14.42, rounded up to 15 pieces.
Taking into account the protrusions in the corners, according to the drawing of the dwelling, you can calculate the molding of each crown. For the log house shown in the picture, this value will be:
9 + 6 + 9 + 6 + 6 = 42 r.m.
Multiplying the molding by the number of crowns, you can get the total number of running meters:
42 x 15 = 630 r.m.
This preliminary calculation is refined in the following stages for the final result of the estimate.
Even with the specified dimensions of the building, a small usable area is obtained from a rounded log. The standard length of lumber is only enough for the ends, long walls have to be built up. The displacement of the row of halves of a whole rounded log is mandatory for each crown. Therefore, you will need:
5 whole elements + 2 halves (each crown).
A blockhouse made of rounded logs should take into account the standard length of lumber. It is enough to cut the whole piece to obtain the required 9 m of each row of the long side.
Taking into account the openings (window blocks of 7 crowns, door blocks - 10 rows) for houses, the required number of running meters of lumber is subtracted from the log structure of this project:
- windows - ((3 x 1 400) x 7) + ((1 x 1 200) x 7) = 29 400 + 8 400 = 37.8 r.m .;
- doors - (900 x 2) x 10 = 18 r.m.
For a log house, 630 - 37.8 - 18 = 574.2 r.m. will be required. cylindering. Most manufacturers, when calculating the volume of a single log, round the price up.
Wood is a unique natural building material with many positive properties and a huge number of admirers. Thanks to this, wooden houses have not lost their popularity even after the appearance on the market of new inexpensive building materials with good quality characteristics. Moreover, with the beginning of the use of milling machines for cylindering logs and obtaining a beautiful, high-quality and easy-to-lay material at the output, the demand curve for structures (houses, baths, summer cottages, etc.) made of wood went up sharply. Today, rounded logs are not less common in construction than gas silicate blocks, sandwich panels or bricks.Pros of building from rounded logs
Natural characteristics of rounded logs: Environmental friendliness- the tree is absolutely harmless to humans and not only does not pollute the atmosphere with toxic substances, but also vice versa, heals the indoor microclimate, disinfecting the air with phytoncides that can suppress the reproduction of bacteria and viruses, and also improves the well-being and mood of people in the room with the help of ether oils emitted by wood. Good sound insulation properties- the tree itself poorly conducts heat and sound, and the quality characteristics of rounded logs and the technology of building houses from them allow minimizing the gaps between the logs during the masonry process, further improving the quality of sound insulation. Maintaining an optimal balance of humidity and temperature conditions in the room- the microporous structure of wood promotes natural heat and air exchange, as a result of which it is cool in a house made of rounded logs in summer, warm in winter, and the air in it never becomes stale, maintaining freshness even with closed windows. Technical characteristics of rounded logs: High precision manufacturing- logs are machined, as a result of which they have strictly specified parameters (diameter, height, length). Castle construction technology- a structurally rounded log has special parts - grooves, with the help of which the logs are connected during the masonry process. This makes building a house easy and possible (with strict adherence to technology!) Even without the participation of professional builders. Attractive appearance- a flat surface, the same size of rounded logs and the natural beauty of the tree make it possible to do without internal and external decorative finishing. Low weight of rounded logs- this feature makes it possible to build houses on "problem", soft soil areas, as well as to save on the foundation (such houses can be safely put on an inexpensive monolithic strip shallow foundation).Cons of rounded logs
Like any other material, rounded logs have their drawbacks. Some of them can be minimized or even completely eliminated: Prone to rot and mold- it is eliminated by applying a bioprotective impregnation, which works as an antiseptic and destroys microorganisms that can cause decay. Fire susceptibility- it is eliminated by applying fire retardants to the surface of the material, which, in the event of a fire and the transition of fire to the walls, begin to emit substances that slow down and suppress combustion. Relatively high cost- the price of a house made of rounded logs is higher than the price of a house made of gas silicate blocks or a panel house. However, the quality characteristics and service life of the house more than offset the price disadvantages. Duration of construction of a house- due to the fact that the tree shrinks a lot, the assembled blockhouse must stand at least six months before the construction can continue. This is the only disadvantage of a rounded log (and, in general, wood as a building material), which cannot be corrected, since a violation of construction technology can lead to rather unpleasant and even dangerous consequences.Calculation of the amount of material
As I said, the high cost of rounded logs is one of its downsides. It is almost comparable to the cost of bricks - the most expensive building material. Therefore, before deciding to build a house from cylindering, it is necessary to make preliminary calculations of the amount of logs that will be needed for its construction. In the calculations, you can use our construction calculator. To do this, it is not necessary to have a ready-made working project, however, you need to know the parameters of the log from which you are going to build (diameter, height, leg length), the weight and cost of its cubic meter, and also have an approximate idea of the dimensions of the future house. Although having a plan, of course, will be a huge plus, since the more accurately the initial parameters are set, the more accurate the calculation will be. Our free program for calculating the number of rounded logs required for building a house, summer cottage or bathhouse displays in the final window not only the number and approximate cost of the finished log house, but also the size of the wall areas, the total area of the structure, the perimeter of the house, the number of crowns and other parameters. The program will also display schematic images of the facade, the side wall of the house, the house in the plan and the log itself - each with a numerical indication of the dimensions laid down and received. Separately, the parameters of the floor partitions and the overall dimensions, volumes, lengths and weights of all elements of the future house will be given. In those places where the program was forced to change the initial values, a warning about this will be displayed in red. All the information presented in the final calculation will be useful both for calculating the required amount of rounded logs, and for roughly calculating the required amount of fire and bioprotective impregnations, as well as insulation, which will be required in the future for caulking grooves and inter-crown slots at home. Read also aboutRounded logs are an ideal material for building a bathhouse or a country house. Such products are distinguished by environmental friendliness and safety, attractive appearance and quick installation, ease of installation and processing. Due to a special manufacturing technology, the logs acquire a perfectly flat cylindrical shape and a smooth surface, the same diameters and dimensions.
Thanks to these parameters, the products are stacked closely, which eliminates the appearance of cracks in the frame. In addition, the construction of a house or a bath is quick and easy. The log structure will look elegant and neat.
10 reasons to build a house from rounded logs
- Natural and environmentally friendly wood does not emit toxic substances and is safe for humans. Moreover, the tree has healing properties and has a beneficial effect on the well-being and sleep of a person;
- Wood promotes rapid air exchange and renews oxygen up to 30% per day. Therefore, it is always comfortable to be in a wooden house and it is easy to breathe;
- Attractive and aesthetic appearance. The log house looks elegant and natural. It will harmoniously fit into any landscape and will stand out favorably against the background of other buildings;
- Due to the special processing of the material on machines, the logs get a flat and smooth surface. Therefore, the products fit tightly to each other and exclude the appearance of gaps in the walls;
- The same diameters and dimensions of the logs make installation quicker and easier. Depending on the complexity of the project, the installation of a log house will take only 3-5 days to 3-4 weeks !;
- Light weight of wood does not require a massive and expensive foundation;
- Rounded logs do not require decorative finishing, either inside or outside the building. By the way, finishing “to zero” in a log house looks harmonious and impressive;
- Wood has high heat and sound insulation performance. The log house is warm, quiet and calm;
- With the correct caulking of the log house, there is no need to repeat the procedure. Whereas at home from a bar, it is necessary to re-caulk after shrinkage;
- The logs are easy to process, which allows you to create interesting structures (houses with a bay window, carved balconies, verandas in the form of a rotunda, etc.). Moreover, the log house can be built in any style!
How to calculate the volume of materials
For those who decide to build a log house, it is important to correctly calculate the required amount of building materials. Since the logs are characterized by a cylindrical shape, it is necessary to carry out the calculation based on this parameter. You cannot calculate volume by simply multiplying wall thickness by height. To do it right, use a special round log cubature.
The simplest calculation is carried out according to the formula = P * R2 * N, where
NS = 3,14;
R2- the radius of the rounded logs in a square;
N- the length of the rounded log.
The result is multiplied by the number of logs required to build a house or bath. Do not forget to add 7%, which is allocated for the shrinkage of the log house. To facilitate the calculation, the results for different diameters of the logs are presented in the table of the cubic capacity of the logs.
Table of cubic capacity of rounded logs 6 meters long
| Diameter, mm | Height, mm | volume, m3 | Area, m2 | Quantity in m3, pcs |
| 140 | 130,6 | 0,09 | 1,453 | 11,1 |
| 160 | 149,2 | 0,12 | 1,662 | 8,29 |
| 180 | 167,9 | 0,15 | 1,869 | 6,55 |
| 200 | 186,6 | 0,19 | 2,078 | 5,31 |
| 220 | 205,2 | 0,23 | 2,286 | 4,39 |
| 240 | 223,9 | 0,27 | 2,493 | 3,69 |
| 260 | 242,5 | 0,32 | 2,701 | 3,14 |
| 280 | 261,2 | 0,37 | 2,908 | 2,71 |
| 300 | 279,9 | 0,42 | 3,117 | 2,36 |
| 320 | 298,5 | 0,48 | 3,325 | 2,07 |
| 340 | 317,2 | 0,54 | 3,532 | 1,84 |
| 360 | 335,8 | 0,61 | 3,74 | 1,64 |
The volume and cost of materials is influenced not only by the type of wood, but also by the diameter of the log. If you are planning to build a house for permanent residence, choose a size of at least 240 mm, and for the northern regions - more than 260 mm. If it is a summer cottage for seasonal living and recreation, logs with a diameter of 220 mm will do. For the gazebo, you can take the minimum size.
The table is not the only way to calculate the required amount of building materials. There is a special online calculator that will make a quick and accurate calculation of the amount and cost of materials, taking into account shrinkage, internal partitions and other factors.
In addition, the calculator will calculate the useful area of the room, the number of crowns and the load on the foundation. As a rule, on the websites of construction companies, each standard project is accompanied by its own calculator.
If you do not know how to correctly calculate the volume of logs, the specialists of the MariSrub company will help you! Experienced craftsmen will select and calculate the amount of materials. Experts recommend choosing rounded pine logs, as this is the best price-quality ratio.
Pine is an affordable strong wood that is distinguished by its strength and durability, a pleasant coniferous aroma and a beautiful texture. Choose your favorite version of a log house or order an individual project! Experts will prepare an estimate of the future house or summer cottage for free, calculate the amount of materials and the cost of construction.
Indicate the dimensions in the units convenient for you: in millimeters,
centimeters or meters by marking the required item.
A- The length of the front wall is determined taking into account the size of your site and the required area of the house. When determining the value A it is recommended to take into account the typical dimensions, the woodworking industry offers rounded logs up to 6 m long. If a longer length is required, joining of the logs will be required, which can affect the strength and thermal efficiency of the structure.
B- The length of the side wall is determined taking into account your wishes and the space allocated for the construction of the house on the site. The length of standard sawn timber (up to 6 m) should be taken into account, in the future this will have a positive effect on the cost of the log house.
Dimension values A and B it is possible to indicate by the external dimensions of the log house, or along the axes of the walls (this option is often used by professional construction firms that design and manufacture log cabins), select the required item.
H- The height of the facade from the first (so-called flap) crown to the ridge of the pediment. If the log house is planned without a pediment, then set the value H= 0.
G- The height of the side wall from the flange to the top of the pediment (ridge). If you do not plan to build a side pediment, then enter the value G= 0.
U- The height of the wall at the corner. This parameter determines the height of the interior space of the future home. The classical technology of building a log house assumes that the first crown of the log house is the flap, the second is the lower trim, into which the floor logs are cut. Usually the cap is made of thicker logs. If the height inside the room is 3 m, then the parameter U≥ 3 m + the values of the working heights of the first two crowns (i.e. if D of the used logs is 0.25 m, then to ensure an internal height of 3 m U≥3.5 m). You should also take into account the amount of shrinkage of wood, in the first years after construction, chopped houses shrink, reaching 1 / 20-1 / 30 of the original height of the log house. Data on shrinkage of sawn timber are given in "and GOST 6782.2-75" Sawn products from deciduous wood. Shrinkage value ".
Height value U must be a multiple of the crown pitch (the working height of the log C), if this condition is not met, then during the calculation the program will automatically change the height and the message Changed! will appear next to the calculation result!
Partitions of the first and second floors.
Specify the length of the partitions of the first L1 and second floors L2.
Specify the height of the first floor partitions P1 and second floor P2.
If partitions on the second floor are not planned, set the values L2 and P2=0.
For small log cabins, (for example, 3 × 5 and less), the construction of partitions from logs is often not justified, since it critically reduces the internal volume of the house.
If the calculation of the material for the partitions in the house is not needed, then set the values L1,L2,P1 and P2= 0.
D- The diameter of the rounded logs is chosen based on the purpose of the structure, taking into account the climatic conditions of your region. The recommendations of GOST 9463-88 “Round coniferous timber. Specifications "and GOST 9462-88" Round hardwood timber. Technical conditions ". If you want to build a bathhouse or a summer cottage, then a diameter of 0.16-0.22 m is suitable. The use of thicker logs is often not justified, since it significantly increases labor costs and the cost of construction. If the house is planned for year-round use, choose a log diameter of at least 0.22 m. It is important to remember that the larger the diameter of the logs, the warmer the house (since the number of crowns, cuttings, locks decreases and, accordingly, the heat loss will be lower). The cost of a rounded log of a larger diameter will pay off with interest during the operation of the house. However, it is more difficult to work with massive logs, you may need special equipment - a crane or a manipulator.
C- Working or useful height of the log, determines the pitch of one crown. The value of this size is less than the diameter of the log and directly depends on the width of the groove, which ranges from 1/2 to 2/3 of the diameter of the log.
T- The length of the ends of the logs protruding in the corners of the house. When cutting without residue, or in a clean corner, T = 0, at the same time the entire length of the material is used to the maximum and the consumption of logs is reduced. At the same time, this type of corner requires a very careful adjustment (according to SNiP 3.03.01-87 "Bearing and Fencing Structures", the size of the gaps at the junction of the logs should not exceed 1 mm), is subject to freezing and blowing. To avoid this, additional finishing of the corners is necessary, for example, overhead boards.
Felling with the remainder or into a bowl is a more costly, but at the same time more heat-efficient and durable option. Since the ends of the logs protruding in the corners of the house, protect this unit from blowing, flooding with rain and freezing. When chopping into a bowl, the parameter T, according to GOST 30974-2002 "Corner joints of wooden cobbled and low-rise log buildings" take ≥1.4 diameters of the used logs.
N- the horizontal distance between the pins (these are round wooden pins that prevent deformational twisting of the logs). The distance between the dowels N is taken as 1.5-2 m, more detailed information can be obtained from SNiP II-25-80 "Wooden structures". It is important that the moisture content of the wooden dowels is 3-4% lower than that of the connected logs, then after drying the connection will not weaken. The holes for the pins must be drilled strictly vertically to ensure the movement of the logs during the shrinkage process.
V- The weight of 1 m 3 (cubic meter) or the so-called specific gravity of a rounded log is determined by the density of the wood (GOST 16483.1-84 "Wood. Method for determining the density"). Density depends on the type of wood, humidity, place of growth. Conventionally, with a moisture content of 12%, tree species can be divided into three groups: with low density (up to 540 kg / m 3) - spruce, pine, fir, cedar; medium density (550-740 kg / m 3) - larch, summer oak; high density (above 750 kg / m 3) - hornbeam, chestnut-leaved oak.
S- the cost of rounded logs in your region for 1 cubic meter (here you can add the cost of delivery, unloading of lumber and assembly of a log house) and then click "Calculate".
The results of calculating the tree for the felling
A calculator for calculating a log house will help to calculate the required amount of material for a bathhouse, house or summer cottage.
As a result of the calculation, you will find out the perimeter and cubic capacity of the log house, the number of crowns, areas and volumes of walls and partitions, the number of logs and their total length, both separately for walls, pediments and partitions, and, in general, for the whole house.
Knowing the area of external walls and partitions, it will be easy to calculate the required amount of impregnation and paints and varnishes.
The total length of the logs will help determine how much you need to buy a mezhventsovy insulation (moss, flax-jute, linen, sheep wool are used).
The number of dowels is calculated approximately.
Openings for windows and doors are not included.
The calculator will calculate the total weight of the log house, which is important to attract a sufficient number of people and equipment for transportation and unloading. As well as the cost of the whole house, which will help to find out the level of investment for the construction of the desired log house.
