25 cubed divided by 20. Edged board. What is a cubic meter

In the process of private construction, for example, a house, a garage or a summer house, probably not a single builder can do without lumber. Even if the house is built from the most fashionable and modern materials, it is impossible to replace part of the wooden structures, such as rafters, logs, battens, for example, with plastic or metal ones, or it is not economically viable.

To build a small house or bath, you will probably need at least a few cubic meters of lumber of various sizes and sections, from boards to timber and slats. If the construction is large enough, then the wood account already underway tens of cubic meters.

At a large-scale construction site, usually the number of certain types of boards or timber has already been included in the estimate and builders do not need to calculate whether they will be enough or not for construction, but what about those who build a small house on a limited budget?

If he buys more lumber than he needs, where does the rest go? In order to help these people in the calculation of lumber and their quantity, we decided to write this article. We proceeded from the fact that for small construction projects, lumber is counted either by the piece or by footage, therefore, the cross-section of boards and bars, as well as their length, are indicated in the tables in a mandatory size. The volume of a particular lumber in cubic meters is also indicated.

This is done so that a person can calculate the required number of boards or bars in cubic meters, since most of the companies that sell lumber sell them in cubic meters. If you buy, for example, boards by the piece in a hardware store, the final price there will be 1.5 - 2 times higher, which is absolutely unprofitable for the buyer.

Additionally, we provided data for the so-called non-standard lumber, because many companies cut wood according to customer sizes and these dimensions may differ from standard ones (usually this is dictated by issues of economy or design features erected building).

Indicating the number of lumber in one cube, we gave the number of solid boards or bars, therefore, for the calculation, it is more accurate to use the data on the volume of a particular type of lumber, multiplying them by the quantity.

For private construction, information about the number of boards or bars in one cube is very useful. When buying several board cubes, you will know exactly how many boards are in a given volume, which will also help you count them upon receipt, that is, you will not be deceived with the quantity.

Lumber calculation table

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Starting construction, any House master one day faced with the need to purchase boards. And here the most interesting begins. Having calculated the necessary quadrature from the width and length, the beginner grabs his head - what to do? After all, similar material in the construction markets is sold by volume, and not by area. Today we will try to figure out how many boards are in a cube (a table of average values ​​will also be provided by us) and how to make all the calculations on our own. Also at the end of the article there will be an online calculator that will allow you to perform all the necessary calculations without any problems.

It is important to know not only the size of the lumber, but also its volume.

Everyone understands that how many cubic meters will be needed for a particular construction will depend on the shape and size of the lumber. But first you need to understand what types and types of material can be found. The main ones can be distinguished:

• Edged timber;
• Planed timber;
• Planed bar;
• Edged bar;
• Edged and floor board;
• Unedged materials.

Each of these types has its own characteristics and is used in its field. For example, a frame cannot be built without, but sheathing a wall with it is the height of irrationality. To do this, now we will consider each of these types separately.

Edged timber and its fields of application

Edged timber is used in cases where appearance aesthetics are not that important. It may have cracks that occur during its drying after processing. It is made by sawing out the central part from an ordinary log, and only after that does it undergo minimal drying. Such lumber, although considered expensive, is still cheaper than planed products.

Planed timber: what is its difference from edged

The differences here are fundamental. If for the manufacture of the previous version no preparation of the log is required, then for the planed one it is pre-dried, and only after that it goes to the sawmill. The surface of such a product is smooth, polished. A beam of this type can even become a good element of decor. Simply put, if it is necessary to erect walls for finishing, an edged timber is purchased, but planed timber does not require finishing. It can simply be varnished. If we talk about strength, then the planed product has less.

Planed bar - what is its difference from a bar

At their core, they are the same thing, the difference is only in size. The bar has a lower height of the ribs, which means it is not suitable for the construction of frames of buildings or residential buildings. Most often, this material is used for decorative purposes. It also finds application in the installation of frames for interior decoration or reinforcing lintels of various wooden panels. The difference between edged and planed timber and the same types of timber is the same.

Edged and floor board: their features and differences

The differences between these lumber are also noticeable at first sight. Edged board not scolded. It has an even shape, but, at the same time, it is in no way suitable for fine finish. In contrast to it, the genital one has three smoothly processed edges (except for the lower wide one) and often has a groove on one side and a spike on the other on the narrow sides. This is done to more tightly connect them to each other, as well as to reduce loads and eliminate floor deformation during operation.

Unedged materials - what are they

These are the cheapest products. When sawing logs, only two opposite sides are processed. Thus, the edges of the boards are uneven. More often, such lumber is used for rough construction.

How many boards in a cubic meter: a table of standard sizes

Some ask an interesting question - how many square meters are in a cube. In fact, it is impossible to answer it! After all, in order to determine this, you need to at least know the thickness of the board. Without this parameter, no calculations will work. Let's try to understand how to calculate the cubic capacity.

This is not a big problem, but it does require attention. We need to understand how many boards are in a cube. And for this you need to calculate the cubic capacity of one of them in size. For example, a board with a section of 1000x250 mm and a length of 4 m. Then the calculations, after converting units of measurement to meters, will be as follows: 0.1 × 0.025 × 4 = 0.01 m 3. This will be the answer to the question of how to calculate the cubature of the board.

How many boards in a cube: table of averages

For example, there are boards with certain sizes. How to calculate the cube of such lumber by the number of boards? You can use the following table:

It's important to know! To calculate how many square meters are in a cubic meter, you need to know all the dimensions of the board. Without information about the length, width and thickness, nothing will work.

Average weight values ​​at different humidity

It turns out that one cube of ash will be much heavier than the same volume of linden. This should be taken into account when planning transportation.

How to correctly calculate the amount of material

Consider how to correctly calculate how many pieces of boards will be in one cubic meter. This is done according to the following formula:

1 m 3 / (L × h × b) = N pieces , where

• L - the length of the board;
• h - width;
• b – thickness.

As you can see, the calculations are not at all complicated.

Useful information! If they say that an inch board is needed, its size will be as follows: width - 75-250 mm, length - 2000-6000 mm, but the thickness is always standard - 25 mm. Often this size name can be heard in the construction markets.

Board cubature calculator or how to make calculations easier

The algorithm of actions itself, how to calculate a cubic meter by quantity, is probably now clear. But there is not always a desire to engage in various calculations. And yes, it's pretty easy to get it wrong. Now we will tell you how to calculate the cube board without making complex calculations.

For such cases, there are special programs called cubic meters calculators. Why are they convenient? The main convenience of such programs is their accuracy. The calculator for calculating the board in a cube is devoid of the human factor, which eliminates the possibility of errors in the calculation process. Another rather weighty argument in its favor is the speed of computations. You just need to enter the correct data in the appropriate fields and click on the "calculate" button. Nothing more is required from the user. The online calculator of boards in a cube will instantly give the result in terms of quantity.

Getting ready for construction frame house, the construction of the roof and the assembly of the crowns of the log house, the developer has to deal with the purchase of timber.
This material is used for the manufacture of various wooden structures, so its assortment includes dozens of items. To eliminate errors, you need to determine as accurately as possible how much timber is in a cubic meter.

The "mathematical model" of this operation is simple. To calculate the volume of any rectangular object, its length is multiplied by its width and height. However, in practice, when buying a large number timber of different lengths and sections can get confused and overpay a considerable amount.

In this article, we will talk about the important nuances of calculating the volume of sawlogs and give easy-to-use cheat sheets for converting linear meters of timber into cubes.

Be careful at the timber warehouse!

Given the high cost of edged timber, its purchase must be treated responsibly. Sellers, as a rule, use the price per 1 m3. Customers in the calculation truss system roofs, wall frames, floor beams and floors receive running meters. Additional confusion is introduced by production length standards, which range from 3 to 6 meters (0.5 meter increments).

It is not difficult to put everything “on the shelves” in this matter. Let's say that for construction you need a bar with a section of 100x50 mm, and its total length is 100 running meters (p / m). To calculate the volume of edged wood, you need to convert the cross-sectional area from millimeters to square meters and then multiply them by the length: 0.1x0.05x100 = 0.50 m3. We get the price of a given amount of timber by multiplying its volume by the cost of one cubic meter.

And here is another equally important question: how to control the amount of sawlogs that the seller releases to you? Here it is necessary to take into account not only the cross section, but also the length of the material.

Let's say that we need a beam 4 meters long (total length 100 p / m). In this case, the volume of one piece will be equal to: 0.1x0.05x4 = 0.02 m3. Dividing the purchased amount of material (0.5 m3) by the volume of one bar (0.02 m3) we get exactly 25 pieces.

In practice, round numbers are rare, so the required amount of timber most often turns out to be fractional. We will not give the seller that part of the lumber that remains after the decimal point. Better pay him up to a whole number of bars.

Consider an example. Purchased 63 running meters timber (section 100x180 mm, length 6 meters). We consider the purchase volume: 63x0.1x0.18 = 1.134 m3. We divide it by the volume of one bar (0.1x0.18x6 m / n \u003d 0.108 m3). We get 1.134 / 0.108 = 10.5 pieces. The seller will not cut half the timber for us. Therefore, when calculating, you need to pay him up to a whole amount and pick up 11 bars.

With a profiled beam, the cross section of which has a complex shape, they proceed in the same way as with a regular one. To determine the cross-sectional area of ​​a given material, its total height (the distance from the bottom edge with the groove to the top mark of the spike) is multiplied by the width.

Considering the amount of timber in 1m3 in the warehouse, take a tape measure and measure the actual cross section of the purchased material. It may turn out that instead of the 100x200 or 150x150 mm promised by the seller, he was delivered thinner material. Even 1 centimeter reduction in the transverse dimension of the sawlog results in significant losses for the buyer.

Another important nuance- technological deviation of the length of the beam. It can reach 5-7 centimeters, since the ends of the logs are not cut off during processing. Remember that the seller does not have the right to add these extra centimeters to the total length.

Tables for quick calculation of the volume of timber

It is not always convenient to count on a calculator how many pieces of timber in a cube, especially when buying a large batch. The seller's data can be easily controlled using ready-made tables. Here, for standard sizes of sawlogs, information is given on the volume of 1 beam and the number of pieces in 1m3.

Table for counting edged timber 6 meters long

This table can also be used when buying a 3-meter beam. To do this, the volume of 1 piece must be halved, and the amount of material in one cube multiplied by 2.

Recall that, by definition, lumber is considered to be lumber with a thickness and width of 100 mm or more. Therefore, we deliberately did not include the dimensions of wooden blanks of a smaller section in the table in order to maintain formal accuracy.

Let's look at the data on the volume and number of boards of running sizes in a separate table:

To calculate the volume and quantity of a 4-meter beam, you can use the following cheat sheet:

As can be seen from the table, almost the entire range of bars here turns out to be fractional. Therefore, for an economical purchase, you should use our advice on paying the seller up to the whole amount of timber.

How to do it practically? Let's take an example. Let's say that we bought one cubic meter of a 4-meter beam with a section of 100x180 mm (according to the table, 13.88 pieces are obtained). The price of 1m3 is 6500 rubles. Up to 14 pieces of bars, we need to pay extra 14-13.88 = 0.12. The volume of this "piece" is (0.12 x 4 meters = 0.48 m) x 0.1 x 0.18 m = 0.00864 m3. We multiply it by the price of 1 m3 and get 0.00864 m3 x 6500 rubles. = 56.15 rubles.

Remember that the purchased volume of bars must include a margin (loss during cutting during operation). Therefore, the result obtained in the process of theoretical calculation of the roof truss system or other wooden structure, must be multiplied by a factor of 1.3. After this adjustment, you can start settlements with the seller.

In addition to determining the volume and price of the purchased material, you need to know the weight of 1 m3 of timber in order to order transport of the appropriate carrying capacity.

The weight of a cubic meter of timber depends on the type of wood and its moisture content. The approximate weight of 1 m3 of dry pine is 510 kg (raw - 890 kg).

The average weight of one cube of dry spruce bars is 450 kg (raw - 790 kg).

The weight of dried oak wood is in the range from 700 to 800 kg/m3, and wet (freshly cut) - from 980 to 1030 kg/m3.

Dry larch timber weighs 650 kg/m3. Freshly sawn material of this type of wood weighs 840 kg/m3.

When building a cottage or a house, the master, by necessity, performs many different tasks. He thinks through all the construction processes, draws up the necessary estimate for each of them. Calculate the correct amount necessary materials not easy. This requires knowledge of mathematics. He must know: how many boards are in 1 cube, how many and so on. If he has such knowledge, then it's great! He is a real master!

And for an ignorant person, “how many boards are in a cube” is an abstract concept. In order to understand it, one must know exactly what it is. Construction Materials made from wood. What are they, how are they measured? Without knowing this, he will not be able to adapt in these calculations.

Edged or tongue-and-groove, as well as other types of lumber

The first thing to learn is that it is not so important from which wood exactly this or that material was made. Let the boards are not the same, but their calculations will completely coincide. Let them different varieties, different sizes, the calculation is still made according to the same principle. It's still wood, and it will be measured the same way! It can only determine how many boards are in 1 cube each time it will be different. Regardless of whether edged or tongue-and-groove, cylindered, etc. calculation will be the same.

Grooved lumber- different beams, edged materials, their non-edged counterparts, this is the case when their cubic capacity is calculated in a completely different way! These products have grooves, spikes. They are intended for docking between forest units among themselves. Such products include:

• blockhouses;
• floor material;
• imitation of various timber.

When purchasing such a grooved one, the circumstance should be taken into account. When calculating the cubic capacity, only the working width of the beam should be taken. The spike is not taken into account here. And when calculating the cubic capacity of a blockhouse, which can imitate a log, one should take into account its thickness, which it has at a high point.

Examples of calculations using formulas for the volume of 1 m3 of wood, as well as price comparison

Since the time of school, any specialist has known exactly how to calculate the cubic capacity or how many boards are in 1 cube. To do this, you need to find the product of 3 quantities: height, length, width. The same method is used to calculate the cubic capacity of a unit. Making calculations more convenient to immediately translate the parameters into the value of "Meter".

For example, the cubature of a unit of material having a length of 6 m and a cross section of 150x25 is calculated as follows: 0.15 m x 0.025 m x 6 m;

The formula we are going to calculate is: V= L*h*b (where L is length, h is height, b is width)

As a result of calculations, 0.0225 m3 is obtained. This is the cubic capacity of one product. If you want to know the cost, then 0.0225 must be multiplied by the cost of 1 cubic meter. After the calculations, it turns out that if we skip it, the cube will cost 6500 rubles. And the price of one of them will be 146 rubles. 25 kop. Here, for ignorant people, there is a little trick of sellers.

Usually, cubature can be rounded up to 0.023. And this means that lumber will cost 149 rubles for the buyer. 50 kop. Sometimes unscrupulous sellers can round off a cubic capacity with a size of 150x50 mm to about 0.05 m3. But if all calculations are performed correctly from the very beginning, it turns out that with a correct calculation, the result is only 0.045 m3.

It seems, so what, someone will say! The numbers are small, but the result is stunning! Such rounding will unwittingly lead only to the fact that the unit price will already be 325 rubles. instead of 292 rubles. 50 kop. And these calculations are performed considering that the price of a cube is 6500 rubles.

In addition, it is also necessary to know and take into account that boards having a nominal length of 6 m actually have a length of 6.1-6.2 m. This should not be taken into account when selling lumber! Sometimes customers may ask to know: how many boards are in a cube. It concerns the acquisition more boards.

Everything is perfectly visible on the example of purchasing boards with dimensions of 150x25 mm, where their number in a cube is 44.4. But still, most often only 44 boards are considered a cube. And with the correct calculation, this amount is listed as 0.99 m3. In reality, an overpayment is obtained for 1 cubic meter. It is approximately 1% of its initial cost. It will look like this: that instead of 6435 rubles. for 1 cubic meter there will be a cost of 6500 rubles.

The volume of unedged wood is calculated in a completely different way. If you buy one of them, then measurements of its thickness and length are performed just as accurately as for edged lumber. But here its width is taken as an average. That is, it is between the smallest and the largest. Example: at one end it is 30 cm wide, and at the other about 15 cm, then to calculate the cubature, this parameter will be 22-23 cm.

If you need to know the volume a large number timber or determine how many boards will be in volume, they should be laid out in piles. But so that the widest of them would not differ from the narrowest by more than 10 cm. In such a pile, their length should match. But this is only an approximation! After that, with a tape measure, you need to measure the height of the stack and its width. These measurements are taken somewhere in the middle, the same applies to length.

The result of the calculation should be multiplied by the coefficient. It ranges from 0.07 to 0.09. It depends on the air gap that exists between the material. When performing calculations, the larger the gap, the smaller the coefficient is taken. If it has the same dimensions, then you can determine the number of boards in the cube.

By the way, for such calculations there are special tables in the textbooks of builders. Similar tables exist for almost all lumber, from and ending. In them, the cubature of common types of timber or other types is indicated. And it is not difficult to calculate the volume of boards, for example, for a fence! You can use the above formula yourself!

Performing a calculation according to the table of timber of standard length 6 meters

Determine how many pieces of boards in a cubic volume according to a special table

Video on calculating lumber in a cube using formulas and tables

There is no such building that would do without the use of lumber.

Therefore, it becomes necessary to determine their exact number. You can calculate how many boards are in 1 cube using formulas, or you can use ready-made tables. These tables are called cubes.

Note that coniferous wood products are considered here.

What is cubature

In the general case, this is the volume of a body, expressed in cubic measures.

The cubature of lumber is the volume of lumber, expressed in cubic meters, otherwise - in cubic meters or simply in cubes.

Types of lumber

In this section, we will talk about lumber in the order in which they are received when sawing a log.

Obapol and croaker

For some reason, confusion arises with the definition of these materials: someone claims that they are one and the same, and someone claims that both are made from croaker.

The proposed table will bring complete clarity.

As can be seen from the table, both fields are not used in construction, so we will not consider it further.

The requirements for the slab are normalized in accordance with OST 13-28-74. And this means that the slab is a full-fledged building material.

The slab is used:

• for subfloor device;
• roof battens;
• formwork manufacturing.

Unedged board

It is propylene on two opposite surfaces, called layers. The edges remain uncut, hence the name.

Her standard sizes the following: thickness - 25, 40 and 50 mm; length - 6 m.

The scope is wider than that of the slab.

It is also used for construction:

• warehouses;
• utility rooms;
• temporary fences;
• canopies.

In addition, it can serve as the basis for lining with clapboard, block house and other finishing materials.

Edged board

It differs from unedged in that it is propylene along the layers and edges.

Used as:

• roof battens;
• wall battens frame houses;
• racks and braces of frame houses;
• stairs;
• material for making country furniture etc.

bar

This is sawn timber with a thickness of 100 mm or more with a difference in the width and height of the section by no more than two times. Usually the beam is square in section. The most used timber has a section of 100 × 100 mm and 150 × 150 mm.

Used:

• in the construction of frame houses in the form of racks and beams;
• as a material for outdoor and internal walls wooden houses;
• for stairs, railings, etc.

Bar

It differs from a bar in that the maximum size of its section is 75 mm. Like timber, it is most often made with a square section.

Is used for internal works, such as device:

• stairs;
• railings;
• window sills;
• bases for finishing sheathing;
• roof battens.

How to calculate the number of boards in a cube

Edged board

As is known from a high school course, the volume of a rectangular parallelepiped (and a cut board, a bar and a bar is exactly that) is equal to the product of the lengths of its sides.

Calculated according to formula 1:

where: V – volume; L - length; b - width; h is the height (in our case, the thickness) of the board.

Having calculated the volume in this way, you can easily find the number of boards in a cube.

To do this, you need to divide the unit by the resulting number (formula 2):

where: N - number of pieces, 1 - 1 cu. m, V - volume.

We should not forget that the dimensions of edged materials are given in millimeters, therefore, before calculating them, they must be converted to meters.

Example

There is lumber with the following parameters:

25 × 150 × 6000, where 25 is the thickness; 150 - width; 6000 - length.

Let's calculate the cubic capacity of the board.

To do this, we convert millimeters to meters and substitute the obtained values ​​​​in formula 1:

V = 0.025 × 0.15 × 6 = 0.0225

Substitute the resulting number into formula 2:

N = 1 ÷ 0.0225 = 44.4

The result is always rounded to whole numbers by discarding the decimal part.

Thus, one cube contains 44 whole boards.

Unedged board

Solving the previous problem in this case is more difficult.

The unedged one has a large difference in width on opposite layers, therefore, when calculating the volume, the average width must be substituted into formula 1: these two widths are added and the resulting amount is divided in half.

The measurement result is rounded up to 10 mm, fractions up to 5 mm are not taken into account, and fractions of 5 mm or more are considered as 10 mm.

In addition, the uncut edges prevent the board from being stacked tightly, and various scaling factors are applied to calculate the exact volume.

The calculation technique is not so much complicated as tedious, so it's easier to use the table in the next section.

Grooved board and lining

They differ from each other only in size, so the calculation method for them is the same.

They are mounted according to the tongue and groove system, as shown in the figure.

In this case, the so-called “working” or “visible” width is taken as the width b - the distance from the base of the tongue to the edge of the board (see Fig.). It is this size that should be substituted into formula 1.

Tables of the number of boards in a cube

In order not to calculate the quantity and volume each time, special cubic tables were compiled, in which for each size of material its quantity in one cubic meter is given.

4 meter boards

6 meter boards

4 meter beam

6 meter beam

Unedged material

Due to the large variation in dimensions in length, thickness and width, it is impossible to calculate the exact amount of slab in one cube, so there is no cubic table for it.

Here is a table for converting the storage volume of a slab into a dense one.

In this case, we solve the inverse problem: we determine what actual volume a known amount of slab has.

For this you need:

1. Disassemble the slab into debarked (which has the thickest end closest to the root of the tree removed) and undebarked.
2. Sort by length - up to 2 meters and more than 2 meters.
3. Sort by thickness if necessary.
4. Put in a bag, alternating thin and thick ends.
5. Calculate the storage volume of the package.
6. Select the appropriate coefficient from the table and determine the actual (dense) volume.

Cube for unedged board.

Cover area calculation

When the main construction is completed, it's time to start finishing work: sheathe walls and lay clean floors.

To do this, recall formula 1. Calculating the volume of one element, we write the intermediate result - the product:

where S is the area of ​​this element.

Having calculated the quantity using formula 2, we multiply the result obtained by the area.

Video

This video contains data not included in the article.