Calculator for calculating the cost of a log house with siding, slab prefabricated-monolithic foundation, wooden-beam ceiling, ondulin roof. Calculation of building a house from a bar Calculator of cubic capacity of a house

Timber houses are very popular and have a number of advantages over log houses. wooden houses. The geometrically correct shape of the timber (a rectangle or a square is obtained in the section) allows you to create more usable space, and it becomes much easier to calculate the amount of material needed to build a house. To do this, you need to know the length and height of all sides of the structure and multiply by the thickness of the beam.

Types of timber products

Today, in the construction market you can find a bar of various sections. So, they often buy lumber products with a section of 120x120, 150x100, 180x180, 200x150, 150x150, 100x100, 140x140 mm. All of them are purchased for certain structures. But the most popular is the section of the beam 150x150 mm, since it combines good cost and excellent thermal insulation characteristics. Also, timber products with a section of 150x150 mm are simply laid, a pronounced number of seam caulked joints is obtained.

Plus, recently, prefabricated glued lumber material, that is, profiled, has been supplied to the market. When compared with typical lumber, it has increased strength properties, heat-saving characteristics due to tongue-and-groove joints, as well as lower shrinkage. Therefore, many experts recommend using it. There is only one drawback - the high cost of the material. Prefabricated adhesive timber has a higher cost, but it is fully justified, since the service life exceeds the time of using conventional lumber.

Formula

Vbeam = wall height x wall length x beam thickness

By making calculations in this way, we get the required amount of material for building a house. Let's take a simple example. If you are going to build a house, the height of the walls of which will be 3 meters, and the length of the walls is 9 and 6 meters from a bar 150x150 mm, then you need to first calculate the perimeter. That is, we add up the length of all walls: 9 + 9 + 6 + 6 \u003d 36 linear meters. Next, multiply the resulting number by 3 meters and get 108 square meters. At the last stage, we multiply by the thickness of the beam, that is, by 0.15. As a result, it turns out 16.2 cubic meters. Thus, the question of how to calculate the amount of timber per house should no longer arise.

Calculation example

As you know, the sale of bars, boards on the market is carried out precisely in cubic meters. This is very often used by many sellers, who allow you to take the excess in your pocket, because buyers do not know how to calculate the cubic capacity of the timber. At the same time, it is not so difficult to find out the necessary cubic capacity. There is one easy method. So, if you purchase lumber of the same size, then you need to multiply the length of the beam by its cross-sectional area. Thus, you will find the amount in cubic meters in one unit of lumber. And then multiply this number by the number of units.

Let's give an example: if you bought 20 units of timber with a length of 6 meters and a section of 150 x 150 mm, then first we find the cross-sectional area of \u200b\u200bthe lumber. To do this, we multiply 0.15 by 0.15 = 0.0225 m2. Then we multiply the resulting number by 6 (the length of the beam). As a result, it turns out 0.135 m3. Well, at the last stage, we multiply by the total amount, that is, by 20. The total cubic capacity of the acquired timber will be 2.7. That's enough simple method you can calculate the cubic capacity for any lumber. By applying this formula, you will save a lot of money.

Before starting the construction of a house from a bar, many consumers ask themselves: how much timber is needed for the construction of the proposed structure. To answer this question, you can go two ways:

Use the beam calculator;
Read the article below about calculation of the amount of timber needed to build a house.

And if everything is more or less clear with a calculator, then it is much more difficult to do it yourself. Let's look into this issue.

Factors affecting the amount of timber needed to build a house.

The main thing to consider when calculating the amount of timber per house is:

What type of timber will be used in construction;
How much timber do we need;
How many units of timber are in 1 cubic meter;
Features of the project of a house from a bar or a cottage.

Calculation of building timber in cubic meters.

And so, how calculate the amount of timber in 1 cubic meter by the simplest method? It should be noted that the following example is not exact. To make a more accurate calculation, you must have a project of the future home.

To calculate the amount of timber in 1m 3, you must:

Calculate the perimeter of the building;
Multiply the perimeter by the height;
The product of the perimeter and the height must be multiplied by the thickness of the product.

For our case, the formula will look like this: V \u003d h * b * l \u003d 0.15 * 0.15 * 6 \u003d 0.135 m 3,

h is the height of the beam;
b- width;
l- length.

We find out how many units of lumber are in 1 cube as follows: 1 / 0.135 \u003d 7.41 pieces.

After carrying out all the above calculations, we will get the result of the number of cubes of timber required to build a building.

To calculate the beam needed for finishing internal walls, we use a similar method. Let's take a specific example, how to calculate the amount of timber for a bath 5 * 10 meters, 3 meters high.

We will conditionally determine that the size of 150 * 150 mm will be used during construction.

(5 m - width + 10 m length) × 2 \u003d 30 m - the perimeter of the building.
30 perimeter × 3 height = 90 m 2 - wall area.
90 area × 0.15 material thickness = 13.5 m 3 - needed to build a box from a 5 × 10 beam 3 m high.

In such a simple way, we calculated the amount of timber for the walls, which is 13.5 m 3. But, you need to take into account that due to the presence of window and door openings, the amount of material used will be less than the calculated one.

Often, craftsmen do not take this moment into account, it is believed that it would be even better to add about 20% in reserve, as a result we will get: 13.5 + 20% = 16.2 m 3 of timber is necessary for a 5 * 10 m building.

Features of the beam, which must be taken into account in the calculation.

When building a house from a bar, the crown is laid first, which should be slightly thicker than the main bar. The first crown is made of a thicker beam, in the future the mass of the whole house will press on it, so it is additionally recommended to treat it with machine oil or an antiseptic.

In the above calculation, this nuance was not taken into account, it must be calculated separately.

Calculation of the beam in units.

After you have calculated the amount of timber in m 3, you can easily find out how much timber will be needed in units (pieces).

Consider a table of common sizes this product 6m long:

Table of the amount of timber in 1 m 3 for calculating timber per house.

*Section bar length**	Volume 1 piece, m 3.	The amount of timber in 1 m 3, pcs.

In the above example, where we indicated the cubature of the beam for the bath, we will carry out a further calculation of materials in pieces.

In order to calculate the amount of material per house in pieces, we carry out such a calculation, for this the sum of 13.5 m 3 must be divided by the cubic volume of the used timber, in our case it is equal to 0.135 m3: 13.5: 0.135 = 100 pieces.

If you correctly calculate the amount of timber in pieces, then when buying a timber, you will be able to control whether the seller ships all the material to you.

The thickness and height of the beam.

The material can have different thickness and height, the following are the main dimensions:

100*100 mm.
100*150 mm.
150*150 mm.
150*200 mm.
200*200 mm.

If everything is clear with the height, the higher the timber, the fewer interventional seams, the faster the construction work is done, and naturally, the number of pieces of timber for building a house decreases. But the width in this case is more important, especially during construction for everything seasonal residence.

Attention: Sometimes timber manufacturers indicate the dimensions of the timber, which may differ from the real ones, for example, a timber of 150x150 mm actually has a size of 140x140 mm.

The consequences of buying such a beam will be very deplorable, if a beam of 150x150 mm in size is needed for a height of 3 meters, 20 pieces, then with a size of 140x140 mm - 21 pieces and a half, and this is one and a half crown rows.

If you are planning to live in a house all year round, then it is recommended to use a beam with a thickness of 200 mm. It is also necessary to take care of the insulation of the walls from the timber, the best option there will be foam or mineral wool 10 cm thick.

When constructing a bath, it is advisable to use a material thickness of 150 mm, it is quite enough to maintain the temperature for a short time. Well, if you still decide to build country house for a summer holiday, then in this case, the walls of a bar of 100x100 mm will be just right.

Building 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 that will be required to erect the building.

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

Basic calculation formula

The calculation of the cubic capacity of a house from a bar is based on several main parameters:

Bar section. Thermal insulation characteristics depend on the thickness of the material, therefore this parameter is especially important not for summer cottages, but for capital construction. The most common option is a bar with a section of 150x150 mm. It's enough to build warm home, while being inexpensive.
The 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 that require timber: 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 take into account the type of timber used. Profiled timber differs in its geometric structure, so its quantity is calculated specifically.

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

It is necessary to build a house from a bar 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 frame, therefore, the material for the construction and the fifth wall must be included in the calculations.

It turns out: 36 linear meters (the perimeter of the house) is multiplied by 3 m (wall height) and 0.15 m (beam thickness). As a result, it turns out that the construction of such a house will require the purchase of 16.2 cubic meters. m. timber. It is on this figure that suppliers will be guided.

In this case, it is necessary to subtract from the amount received the volume of timber, which will be saved on window and doorways. The result will be the quantity that you need to focus on when buying. If you need to calculate the cubic capacity of the timber per house, you need to round the calculations up. It often happens that at least a small part of the material is defective, so there may be a shortage.

Calculation of the volume of timber for floor and ceiling beams

It is also necessary to include a beam on logs, beams and other elements in the calculation. Their number depends on the type of rafter system chosen, on the size of the house and some other parameters. Basic provisions:

The standard distance between floor and ceiling beams is 0.8-1 meter, beam dimensions for 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, 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: divide 10 by 0.9 and subtract 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: 0.1x60x0.15 \u003d 0.9 cubic meters. m. At the same time, it is advisable to purchase 1 cubic meter, so that under any force majeure circumstances you do not have to buy additional material.

Calculation of the number of timber per truss system

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

The larger it is, the less snow will linger, but the load from the wind will increase. Consider the calculation for a standard roof with a slope of 45 degrees.

The standard distance between the rafters is 60 cm; material with a section of 100x150 mm is used for them. At the same time, the smaller the 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 that can be found on construction sites. The main parameters of the building are driven into the program, after which the main calculation will be performed.

However, it must be remembered 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 an approximate cost building materials for home.

The correct calculation of the cubic capacity of the timber will allow you to make the most accurate estimate and avoid unnecessary costs. Many construction companies offer a free estimate, and you can compare several options in advance. Discuss with the architect possible options savings, then the construction will not require sudden additional costs and will be as effective as possible.

Building a house is always associated with significant financial costs. However, so that the costs do not exceed the allotted limit, and the materials are purchased in sufficient quantities, it is necessary to calculate the cost of building a house from a bar.

Regardless of whether the construction of a dwelling is planned on its own or workers will be hired for this, you need to draw up an estimate. This is the basis of all work.

The formula for calculating the consumption of timber for the bearing walls of the house

The calculation of a beam for building a house is carried out according to the formula:

the sum of the lengths of all walls of the structure is calculated, not only external, but also internal - this is the perimeter;
the perimeter is multiplied by the height of the house, excluding the gable area (the facade of the building, limited by the roof slopes and cornice);
the resulting value 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 on a specific example:

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

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

Bar section	PC. cubed	Volume 1 pc.

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

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

Stage two: material consumption for the roof frame

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

Factors Affecting the Amount of Material Required for a Roof Frame

In order for the roof to be not only beautiful, but also reliable, you cannot save on building materials. It is necessary to strictly follow the technology for its independent construction.

The frame of a wooden roof includes the following mandatory elements:

rafter legs, or just rafters;
pediment, made of timber, similarly to load-bearing walls;
logs (beams) - horizontally located bars, the base on which the floorboard is laid;
Mauerlat - the most thick timber, located along the perimeter of the walls, is designed to evenly distribute the weight of the roof frame;
lathing - 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 materials for building a house from a bar should be calculated. That is, in order for the frame to comply with the declared standards and protect the structure from snow, melt and rain water, do not let cold air through, be energy-saving, you need to find out exactly how many blanks will be needed.

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 6×6 house. For a reliable foundation, you will need a thick, strong beam with a section of 150 * 100 mm or 150 * 150 mm. It is laid on 4 load-bearing walls, respectively, in order to build a Mauerlat, 4 beams of 6 m each are needed.

Note! If the building does not involve 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 with 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 - the perimeter, it is divided by the length of one bar.

30 m /6 m=5 pcs.

Total: for the construction of a Mauerlat for the construction of 6 × 9 m, you need 5 bars of 6 m each.

Calculation of the amount of material for rafters and battens

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

The calculation of the material for the construction of a house from a bar, which will be used for the construction of rafters, is carried out according to the formula:

The total load of snow and wind per square meter of the roof - it is calculated on the basis of SNiP 2.01.07-85 "Loads and Impacts". For a slope with a slope 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.
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 \u003d 5148 kg.
Now you need to find out the length of all the rafters and, therefore, how much timber you need to purchase for their construction. To do this, based on the fact that one linear meter is able to withstand 100 kg of weight, we divide 5148 by 100, as a result we get 51.48 m - this is the minimum length of the rafters.
The slope of the roof hangs over the wall by about 50 cm, respectively, you need to buy wood 4 m.
It is easy to calculate the number of pieces: 51.48 / 4 \u003d 12.87, or more precisely, 14, since they are arranged in pairs. That is, you need 7 pairs.

The instruction says that the distance between the rafters is equal to the number that will be obtained if the length of the roof is divided by one less than the number of pairs of rafters: 6.5 / 6 \u003d 1.08 m. The cross section of the blanks is 100 * 150 mm or 150 * 150 mm.

The rafter system also includes a wooden crate. For it, boards with a thickness of about 2.5 cm 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 ways of laying, which will depend on the amount of purchased material.

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

Calculating the amount is easy. The lengths of the skate and board are measured. Next, we divide the footage of the skate by the footage of the board. 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 we 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 a bar is a very painstaking task, it is also necessary to take into account the fact that everything must be purchased with a small margin in case of marriage. The roof flow rate is calculated based on the roof surface area. This does not take into account natural openings - a place for a chimney and an attic door, if one is included in the project.

The number of blanks for the installation of beams

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

For beam ceilings, only coniferous wood is used, more often larch is the most durable and reliable material that can withstand significant weight:

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

It is better to choose blanks that have been dried in steam chambers and have a moisture content of no more than 14%. The aspect ratio should be 150*100mm or 150*200mm.

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

Here is a table, following which it is easy to determine how many pieces you need:

span width	Distance between beams	Optimal section of the workpiece

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 go to close the span and 2 more to the edges, directly near the walls. The price depends on the length of the beam.

Stage three: the number of floorboards

Before you start calculating for buying a floorboard, you need to decide on its parameters.

The most optimal are: length 4, 4.5 and 6 m.
The thickness is represented by the following sizes: 30 mm, 25 mm and 32 mm.
The standard width is 100mm and 105mm.

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

The calculation of the material for building a house from a bar is based on the length and width of the covered area. And also how the board will spread - along or across.

It's pretty easy to do the calculations. If you know the parameters of the blanks, you can determine the usable area, it is 5-7 mm less than the actual one due to the sheet pile.

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

Calculations are made in this way:

the previously known area of \u200b\u200bthe living space is divided by the area of \u200b\u200bone board, taking into account only the useful one - this is the amount required for laying;
when the room has parameters other than 6 m, it is important to know the amount of the whole material. To do this, the width of the room is divided by the working width of the floorboard.

Based on the information received, it is easy to find out how much it will cost to build a house from a bar. It is also necessary to take into account Consumables: insulation, roofing material, additional fasteners. Their number depends on the project of the house, the area and other factors.

Conclusion

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