Approximate calculation of timber cubic capacity for a house. Calculation of timber for a house Calculation of timber 150x150

Construction wooden house– a rather expensive option, since high-quality lumber is expensive. Because of this, it is especially important correct calculation the amount of timber required to construct the building.

The amount of lumber is measured in cubic meters: since the timber has the correct shape and a square or rectangular cross-section, it is not difficult to calculate how much timber is in a cubic meter and determine how much materials need to be purchased for a building of a certain area. How to calculate the cubic capacity of timber for a house?

Basic calculation formula

Calculation of the cubic capacity of a house made of timber is based on several basic parameters:

• Section of timber. Thermal insulation characteristics depend on the thickness of the material, so this parameter is especially important not for country houses, but for capital construction. The most common option is a beam with a section of 150x150 mm. This is enough for construction warm home, and it is inexpensive.
• Linear dimensions of the house. It is important to calculate not only the length and height of the walls, but also the number of other additional elements, for which timber is required: these are rafters, floor and ceiling beams etc. They also need to be included in the calculations, since it is better to immediately purchase all the necessary material.
• It is also necessary to consider the type of timber used. Profiled timber differs in its geometric structure, so its quantity is calculated separately.

How to calculate the cubic capacity of a timber house? The basic calculation formula is as follows: volume of timber = length of the walls of the house * height of the walls * thickness of the timber. Let's take a closer look at the calculation example:

It is necessary to build a house from timber with a wall height of 2 m, a wall thickness of 150 mm, the length of the walls of the house is 6x9 meters. It is planned to build a five-wall log house, so the calculations must include the material for the construction of the fifth wall.

It turns out: 36 linear meters (house perimeter) multiplied by 3 m (wall height) and 0.15 m (beam thickness). As a result, it turns out that to build such a house you will need to purchase 16.2 cubic meters. m. timber. It is this figure that suppliers will focus on.

In this case, you need to subtract from the resulting amount the volume of timber that will be saved on window and doorways. The result will be a quantity that you need to focus on when purchasing. If you need to calculate the cubic capacity of timber for a house, you need to round the calculations up. It often happens that at least a small part of the material is defective, so shortages may occur.

Calculation of the volume of timber for floor and ceiling beams

It is also necessary to include timber for logs, beams and other elements in the calculation. Their number depends on the type of rafter system chosen, the size of the house and some other parameters. Key points:

The standard distance between the floor and ceiling beams is 0.8-1 meter, the dimensions of the beams for the beams are 100x150 mm. The number of beams per house is calculated as follows: the total length of the building is divided by the step length, and one is subtracted from the resulting value. That is, if the length of the building is 10 meters, with a step of 0.9 m, 10 beams will be required: 10 divided by 0.9 and subtracted 1.

The standard length of one beam will be 6 meters, which means that 60 linear meters of timber will be required. Since the cross-section and length are known, it will not be difficult to calculate the volume: 0.1 x 60 x 0.15 = 0.9 cubic meters. m. In this case, it is advisable to purchase 1 cubic meter, so that under any force majeure circumstances you do not have to purchase additional material.

Calculation of the amount of timber per rafter system

More complex calculations will be required for the rafter system of the house. Most often in suburban construction use regular gable roofs, and the slope will depend on the selected type of material.

The larger it is, the less snow will be delayed, but the wind load will increase. Let's consider the calculation for a standard roof with a slope of 45 degrees.

The standard distance between rafters is 60 cm; material with a cross-section of 100x150 mm is used for them. At the same time, the less rafter step, the smaller the thickness they can have due to the distribution of loads. Calculations are performed as follows:

Independent calculations take a lot of time, so sometimes it’s easier to use a special calculator, which can be found on construction sites. The main parameters of the building are entered into the program, after which the main calculation will be performed.

However, you need to remember that any calculator gives only an approximate result, which must be rounded up. The resulting calculation result is multiplied by the average cost of timber in the region: as a result, you can get the approximate cost of building materials for a house.

Correct calculation of timber cubic capacity will allow you to create the most accurate estimate and avoid unnecessary expenses. Many construction companies They offer a free estimate, and you can compare several options in advance. You need to discuss with the architect possible options savings, then the construction will not require sudden additional expenses and will be as productive as possible.

Building a house always involves significant financial expenses. However, to ensure that costs do not exceed the allotted limit, and that materials are purchased in sufficient quantities, it is necessary to calculate the cost of building a house made of timber.

Regardless of whether you plan to build a home on your own or will hire workers for this, you need to draw up an estimate. This is the basis of all work.

Formula for calculating timber consumption for load-bearing walls of a house

Calculation of timber for building a house is carried out according to the formula:

1. the sum of the lengths of all the walls of the structure is calculated, not only external, but also internal - this is the perimeter;
2. the perimeter is multiplied by the height of the house, excluding the pediment area (the facade of the building, limited by the roof slopes and cornice);
3. the value obtained as a result should be multiplied by the thickness of the timber selected for construction.

The result is the number of cubes required to build a house. Usually limited to one, less often two floors.

It is convenient to consider the formula using a specific example:

Total: to build a house you will need 13.5 cubic meters of timber with a cross section of 150*150 mm. If there are more walls expected, then they are also taken into account in the calculations.

For the convenience of calculations and to facilitate the purchasing process, you can use the data below, with a length of 6 m:

In order to correctly calculate the construction of a house made of timber, it is necessary to take into account the moment that cannot be avoided when individual construction– even the most trusted supplier may have several defective units in one batch. This must be taken into account when purchasing and purchase blanks with a small margin.

It is better to take products from the same batch, otherwise problems may arise during joining of elements due to different ways processing and its quality.

Stage two: material consumption for the roof frame

For a house made of timber, a rafter system is used - this is the load-bearing frame of the roof. Wood is a durable material, but it should not be overloaded so as not to provoke uneven shrinkage and destruction load-bearing walls.

Factors influencing the amount of material required for a roof frame

To ensure that the roof is not only beautiful, but also reliable, you cannot skimp on building materials. It is necessary to strictly follow the technology when constructing it yourself.

Frame wooden roof includes the following required elements:

• rafter legs, or just rafters;
• pediment, made of timber similar to load-bearing walls;
• logs (beams) - horizontally located beams, the base on which the floorboard is laid;
• Mauerlat - the thickest timber located along the perimeter of the walls, designed for uniform distribution weight of the roof frame;
• sheathing - attached to the rafters and serves as the basis for laying the roof.

SNiP 31-02 imposes a number of requirements on any roof, based on which the materials for building a house made of timber should be calculated. That is, in order for the frame to comply with the stated standards and protect the structure from snow, melt and rain water, not allow cold air to pass through, and be energy-saving, it is necessary to find out exactly how many blanks are required.

How to calculate the amount of building material for a frame: Mauerlat

The amount of material directly depends on the coverage area. As an example, consider a 6x6 house. For a reliable foundation, you will need a thick, strong beam with a cross-section of 150*100 mm or 150*150 mm. It is laid on 4 load-bearing walls, respectively, to build a mauerlat you need 4 beams of 6 m each.

Note! If the structure does not have internal load-bearing walls, then the distance between them should not exceed 8 m. If there is another support inside the house, then the distance increases to 14-16 m.

To calculate the amount of timber for a wall length exceeding 6 m, it is necessary to calculate the total footage of the perimeter:

For example: 6+6+9+9=30 m

30 m is the perimeter, divided by the length of one block.

30 m/6 m=5 pcs.

Total: to construct a mauerlat for the construction of 6x9 m, you need 5 bars of 6 m each.

Calculation of the amount of material for rafters and sheathing

The rafter system is the main support for roofing material, it protects it from wind and snow.

Calculation of material for the construction of a house made of timber, which will be used for the construction of rafters, is carried out according to the formula:

1. The total load of snow and wind on square meter roof - it is calculated on the basis of SNiP 2.01.07-85 “Loads and impacts”. For a slope with a slope angle of 45◦, a roof length of 6.5 m and a rafter length of 3.5 m, the load will be 226.3 kg/sq.m.
2. The total load is 5148 kg. We multiply 6.5 by 3.5 and get 22.75 m - this is the surface area of ​​\u200b\u200bone slope. Accordingly, 22.75*226.3=5148 kg.
3. Now you need to find out the length of all the rafters and, therefore, how much timber you need to purchase for their construction. For this, based on the fact that one linear meter able to withstand 100 kg of weight, divide 5148 by 100, the result is 51.48 m - this is the minimum length of the rafters.
4. The roof slope overhangs the wall by about 50 cm, so you need to buy 4 m of wood.
5. It’s easy to calculate the number of pieces: 51.48/4 = 12.87, or more precisely 14, since they are arranged in pairs. That is, you need 7 pairs.

The instructions say that the distance between the rafters is equal to the number that is obtained if you divide the length of the roof by one less than the number of pairs of rafters: 6.5/6 = 1.08 m. The cross-section of the blanks is 100 * 150 mm or 150 * 150 mm.

The rafter system includes wooden sheathing. For it, boards about 2.5 cm thick are used. They are placed horizontally, that is, parallel to the ridge.

The width of the board should not exceed 15 cm. There are two installation methods, which will determine the amount of material purchased.

The first is continuous laying, when the distance does not exceed 1-2 cm and is discharged. Then the span can reach 10 or more centimeters. The more often the boards are laid, the stronger and warmer the structure, but at the same time, the more expensive it is.

It's easy to calculate the quantity. The lengths of the skate and board are measured. Next, divide the skate footage by the board footage. This helps to find out how many boards are needed for one strip.

If the width is 15 cm and the gap is 5, then divide the length of the slope by the number obtained as a result of addition. The total is the number of blanks in pieces.

Calculating the cost of building a house from timber is a very painstaking task; it is also necessary to take into account the fact that everything must be purchased with a small reserve in case of defects. Roofing consumption is calculated based on the roof surface area. This does not take into account natural openings - a place for a chimney pipe and an attic door, if one is included in the project.

Number of blanks for beams

Floors from wooden beams are most in demand in low-rise construction. They have a relatively low cost, they are easy and quick to make, wood is a fairly durable material, and is light in weight. It does not place significant loads on the foundation.

Only wood is used to cover the beams coniferous species, more often larch is the most durable and reliable material, able to withstand significant weight:

• resistant to temperature fluctuations;
• maintains stable geometry;
• almost no shrinkage.

Choose better than blanks, which have been dried in steam chambers and have a moisture content of no more than 14%. The aspect ratio should be 150*100 mm or 150*200 mm.

For correct design, to make the correct calculation of materials for building a house from timber, it is necessary to be guided by the span width. The larger the span, the more often beams are laid and their number will increase. For attic floor It is not necessary to place the workpieces too close to each other.

Here is a table that makes it easy to determine how many pieces you will need:

This means that for a span of 4 m you need to buy 6 blanks for laying floor beams, taking into account a step of 1 m. That is, 4 pieces will be used to cover the span and 2 more for the edges, directly next to the walls. The price depends on the length of the beam.

Stage three: number of floorboards

Before you start making calculations for purchasing a floorboard, you need to decide on its parameters.

• The most optimal lengths are 4, 4.5 and 6 m.
• The thickness is available in the following sizes: 30 mm, 25 mm and 32 mm.
• Standard widths are 100 mm and 105 mm.

If you want to make a floor from whole boards, then it is advisable to reduce the amount of waste.

Calculation of material for building a house from timber is made based on the length and width of the covered area. And also how the board will be laid - along or across.

The calculations are quite simple. If you know the parameters of the workpieces, you can determine usable area, it is 5-7 mm less than the actual one due to the tongue.

Most often, manufacturers make boards 6 m long. It is also necessary to take into account the possible amount of waste that cannot be avoided.

Calculations are made as follows:

1. in advance known square living space is divided by the area of ​​one board, taking into account only the useful one - this is the amount required for installation;
2. when the room has parameters different from 6 m, it is important to know the amount of intact material. To do this, the width of the room is divided by the working width of the floorboard.

Based on the information received, you can simply find out approximately how much it will cost to build a house made of timber. It is also necessary to take into account Consumables: insulation, roofing material, additional fasteners. Their number depends on the design of the house, the area and other factors.

Conclusion

The video in this article will clearly help you understand these issues.

When implementing construction work for the construction of a residential building, a specialist must perform a large number of different tasks, one of which is: drawing up and calculating the estimated cost before the final finishing of the premises of a residential building. It is mandatory 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 complete the work as efficiently and quickly as possible.

Buying club: existing types of boards

To calculate exactly how many board pieces are in a cube, you will need to know not only what exactly a board cube means, but it is worth understanding important point that exist different kinds boards and what is possible to purchase on the modern market for performing 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.

Non-grooved types of lumber are: timber, various edged boards, as well as unedged boards (they are an exception when calculating cubic capacity, because this process occurs a little differently). Tongue-and-groove types (which have special grooves for making joints) include: modern lining, blockhouse, flooring material, as well as imitation of natural timber. When you choose a tongue-and-groove type of building material for purchase, then you will need to pay attention to the fact that when making calculations, only the working width of the board without a tenon is used. If we talk about a blockhouse (imitation log), then when calculating the cubic capacity, only the thickness at its highest point is taken.

How many boards are in 1 cube: performing the calculation

Any person, even from his school days, understands how 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 ​​into meters. The cubic capacity of 1 board, which has a cross-section of 150x20 mm. and a length of 6 m, is calculated as follows: 0.15 multiplied by 0.02 and 6, so that the cubic capacity of this board will be 0.018 cubic meters.

Let's 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 m3.

To determine how many boards are in one cube: divide 1 m3 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.

Finding out the cost of a certain type of board when the values ​​of its volume is known is quite easy: 0.018 multiplied by the price of 1 cubic meter. When 1 cube of a certain type of board costs, for example, 5,500 rubles, then the cost will be 99 rubles. At this point in the calculation, there is some trick of sellers and managers in construction stores, because the cubic capacity of the material is rounded to some integer 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, actually have a length of 6.1 - 6.2 m, which is not taken into account when selling this building material. This also applies to the purchase of a significant number of boards. This can be seen quite clearly if we use a 150x20 mm board as an example. The number of boards in a cube is a value of 55.5 pcs. But, in a cube they count 55 pieces, which when performing the calculation will have 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 amount to 1% of the real price. For example, 5500 instead of 4995 rubles.

To calculate the cubic capacity for a continuous type of board, slightly different methods are used. When we are talking about buying 1 board, then measuring its thickness, as well as the total length, is carried out in the same way as when choosing edged building material. In this case, the average width is taken for calculations - between a large value and a small one.

For example, when the width of the board at one end 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 similar boards for construction, then you will need to lay them out 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 stack should be approximately the same. After this, using a regular tape measure, an accurate measurement is made of the height of the entire existing stack of boards, and the width is measured (approximately in the very middle). The result obtained will then need to be multiplied by a special coefficient, amounting to a value from 0.07 to 0.09, directly dependent on the existing air gap.

How many boards are in 1 cube: special tables

To calculate the exact number of boards of a certain width and length in 1 cubic meter, various tables are used. Below are several such specialized tables, which indicate the cubic capacity of the common and in demand types of this material today. Calculate the volume of various boards having various sizes, for example, material for constructing a fence on your site, you have the opportunity to independently use the existing formula, which is presented above.

Table of the amount of edged boards in 1 cubic meter

Table of the amount of timber in 1 cubic meter

Table of the amount of unedged boards in 1 cubic meter

Calculation of timber for a house is necessary in order to determine the required amount of lumber for the construction of a rafter system, implementation of formwork work and overlapping floors of a construction site. Its correct calculation is especially important when building cottages from laminated or sawn timber.

How to calculate the amount of timber per house?

In order to correctly navigate the needs of lumber, it is necessary to make a structure design indicating the exact dimensions on which the length of the timber depends. Regarding its thickness, it is important to consider the following factors:

• for a private home or baths will do timber with a section of 200x200 mm;
• for seasonal construction it is possible to use wood with dimensions of 100x100 mm or 150x150 mm.

Based on the fact that the cost of wood building material is indicated in cubic meters, to calculate exact quantity pieces of logs in 1 cubic meter, you need to make a simple calculation:

1m3/Z/W/L, where

• Z - board width;
• W - board thickness;
• L is the length of the board.

The design of the house involves calculating the required volume of ceiling and floor beams, determining lumber for the rafter system, external walls, gables, and internal partitions.

Often, construction uses ceiling and floor beams with a cross-section of 100x150 mm using a pitch of 0.7 to 1 meter. In order to determine their quantity, you must use the formula:

• Ld is the length of the house;
• Ls is the length of the applied step.

Taking into account the fact that lumber is sold by the supplier in cubic meters, calculating the cubic capacity of a timber involves multiplying its cross-sectional area and linear length.

Calculation of timber for external walls and load-bearing partitions involves determining the area and thickness of the walls. Multiplying these parameters will give the total volume of timber required for the construction of the specified structural elements.

Timber cubic capacity calculator

To accurately calculate the cubic capacity of lumber for rafter system the use of special arithmetic algorithms will be required. The beam calculation calculator will greatly simplify the task. Correct determination of the required building material guarantees the reliability of the construction of the building structure and savings in financial costs.

The program will allow you to calculate timber online by entering initial data. By changing the specified parameters, you can compare several projects and choose the most profitable one from a financial point of view. By processing the individual parameters of a house project, the calculator will make the most accurate calculation, eliminating the risk of overpaying for excess material. It is important to consider the possible percentage of defects, which is about 5% of the total volume of lumber.

Of course, during construction it is very important to correctly calculate the required amount of materials. After all, each log costs a lot of money, and its transportation is associated with certain difficulties. And if an error was made in the calculations, this can lead to serious difficulties. Our online beam calculation calculator will help you do this online.

If there is a lack of material, you have to interrupt construction process, and wait until the timber is delivered in the required quantity. If too much timber was purchased, then there will be a few extra logs left, the money for which was wasted.

But if you use a calculator to calculate the amount of timber when calculating, you will get the most accurate result. It is important that the calculator is very easy to use, thanks to which even an inexperienced person can minimum terms carry out the necessary calculations.

First, you need to enter the approximate dimensions of the future house - height, length and width of the walls. Of course, to know this data, you need to have

Only then will you be able to use accurate data.
The next stage is choosing the length of the beam. The beam can have different lengths, usually from 5 to 12 meters. This allows you to select optimal length for any project, without overpaying extra money and without wasting time connecting two elements.
The last stage is to indicate the section of the beam.

In private construction, timber with a cross section from 150x150 to 200x200 is usually used. The choice of suitable timber depends on the desires and capabilities of the future home owner.


But it is worth noting that the thicker the timber, the better heat and sound insulation characteristics it will have. However, at the same time, the cost of building materials also increases. So, you should take a serious approach to the choice of material so that it not only meets your requirements, but also its cost does not make the material unaffordable for you.