How much of what is in a cube of lumber? Calculation of lumber in one cube. Determining the volume of an unedged board
When preparing for the construction of a wooden building, house or structure, it would be prudent to first find out the total amount of material needed to completely complete the construction of the object. And when a bar is used in the process, its quantity can be found out using special tables with calculations. Or for this you can use calculations carried out independently.
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Mathematical model for calculating the number of bars in a cube
The main way to calculate the number of bars in a cube of wood is a simple formula; for this you need to multiply the area of the rectangular diameter of the bar by its length, and the diameter itself is calculated by multiplying the height by the width.
To accurately determine the number of bars per cubic meter of wood, depending on its cross-section and length, it is necessary to make calculations:
For example, for the construction of an object you need 100 linear meters of a 40 by 50 mm bar, which has a length of 3 meters. To do this, you first need to find out its area 
diameter: 0.04 m * 0.05 m = 0.002 sq. m., it leaves 0.002 sq. m. Next, you need to multiply this area by the length of the bar: 0.002 * 3 = 0.006 cubic meters. m is the volume of one bar with a diameter of 40 by 50 mm. Then we divide 1 cubic meter of wood by the volume of one block: 1 cubic meter. m. / 0.006 cu.m. m. = 166 pieces.
Now we have the result obtained, a total of 166 pieces of timber in 1 (one) cubic meter of wood with a diameter of 40 by 50 mm and a length of 3 meters. Now everyone can find out about the bar - how many pieces of bars there will be in a cube. Using the same similar formula, you can calculate the amount of a bar relative to other types of bars that have different indicators and diameter sizes.
Counting and completing a math problem
From the example, we can now calculate that for the construction of the facility it will be necessary to have 100 linear meters* 0.006 cubic meters. m. = 0.6 cubic meters m. This is also the result: to fully complete the construction of an object that requires 100 linear meters of timber, you need to buy 0.6 cubic meters of wood. This figure will be needed to recalculate the cost of a block purchased individually per unit of product to the cost of one cube of wood.
Table of the number of bars in a cube
| Name of lumber | Size of timber sections (mm) | How many timber (pieces) in a cube (in 1 cubic meter) | Volume of one beam in cubic meters (m3) |
| Bar | 25x50x3000 | 266 | 0,0037 |
| Bar | 30x40x3000 | 277 | 0,0036 |
| Bar | 30x50x3000 | 222 | 0,0045 |
| Bar | 40x40x3000 | 208 | 0,0048 |
| Bar | 50x50x3000 | 133 | 0,0075 |
| Bar | 50x70x3000 | 95 | 0,01 |
Meters are linear, square and cubic. When starting a large construction project or even a small renovation, you should clearly understand these terms. The ability to correctly convert the amount of certain materials into linear or cubic meters will serve an excellent purpose in preliminary calculations of the cost of planned repairs or construction. For example, clearly understanding how much square meters in one roll of wallpaper, you can quickly calculate the amount required to cover a room or the entire apartment.
Calculations can be made in cubic meters, square or linear meters
If the upcoming repair or construction involves the use of wooden materials, it is necessary to thoroughly study the conversions from linear meters to cubic meters, since prices can be presented on the market both per unit of material and per cubic meter. The amount of timber in a cube varies and depends on its cross-section. The easiest way to find out how many boards are in a cube is a table, but if it is not nearby you will have to remember the formulas.
What is a cubic meter
A cubic meter (abbreviated m³) is a unit of volume and is equal to the volume of a cube with an edge length of 1 meter. In accordance with GOST 8486-86 wooden materials must have measurable cross-sectional dimensions and lengths, so that you can easily calculate the number of boards included in a cube of material.
To determine the dimensions of the section, it is necessary to step back from the end of the beam at a distance of at least 10 cm and measure the width and height of the beam. By multiplying these values by each other, you get the cross-sectional area of the beam, multiplying it by the length to get the volume of one beam. By calculating the number of beams in one cubic meter, you can easily navigate between the cost of one beam and one cube of beams.
A cubic meter is equal to the volume of a cube with an edge side of 1 m
Calculation of lumber for construction before purchasing it
Of course, the easiest way is to come to the developer to explain what you want to see in the final version and agree to the proposed project. But, if you independently understand the calculations of the required amount of lumber, then even at the stage of discussing the cost of materials and work on building a house, you can get an idea of how realistic the prices are offered by the construction company.
Many developers calculate the required amount of material in cubes, some count piece by piece, taking the standard length dimensions as 6 or 12 m. A clear understanding, for example, of how much timber is in a 150x150x6000 cube will protect you from overpayments.
Standard timber 0.15x0.015x6 meters
The procedure for calculating the amount of timber in a cube
Despite the same principle of calculations, there are certain nuances in determining the cubic capacity and quantity of various lumber.
1. Basic formulas for calculating the number of bars in a cube
To determine how many boards are in a cube, with beams of a certain section, you need to know three measured parameters: length, width and height. First you need to calculate the volume of one beam using the formula V = a * b * l (here V – volume, m³; a – height, m; b – width, m; l – length, m)
Beam parameters: length, width, height
How many pieces of timber in a cube is determined by the formula:
Where, A is the amount of timber in a cube, pcs.;
1 – one cubic meter, m³;
V – volume of one beam, m³.
2. How to determine how many pieces are in a cube of 100x150 timber
In price lists construction companies for convenience, indicate the cross-section of the beam, that is, its width and height, for example, 100x150. Where 100 is the width indicated in millimeters, and 150 is the height. The length is most often 6 meters, or 6000 mm.
The volume of timber 100x150x6000 will be 0.09 m³.
V = 0.1 m * 0.15 m * 6 m = 0.09 m³. Here 0.1 is the width, m; 0.15 – height, m; 6 – beam length, m.
In this case, how much material will “fit” in one cubic meter can be found by dividing the cubic meter by the volume of one beam:
Where, 1 – one cubic meter, m³;
0.09 – calculated volume of one beam 100x150x6000, m³.
The characteristic cross-sectional shape of the timber is 100x150
This way you can easily calculate how many pieces of timber are in the purchased volume of material by multiplying the number of pieces by the number of cubes. For simplicity and speed of calculation, you can use the table: how many timber in a cube is 6 meters table.
3. How many edged boards are in 1 cube
The situation is similar in calculating the amount of edged boards in 1 cubic meter of wood. For example, the board used has the following parameters 100x25x6000 (width, height, length).
The volume of one board will be 0.015 m³.
V = 0.1 m * 0.025 m * 6 m = 0.015 m³
Quantity in 1 cube:
That is, a cubic meter contains at least 66 boards. When purchasing a cube of 100x25x6000 edged boards, you should get 67 pieces, rounding up. For example, when buying three cubes you should get at least 201 pieces, and when buying six - 401.
4. How many tongue and groove floor boards are there in 1 cube?
tongue and groove floor board for better installation It has a groove along its entire length on one side and a tenon on the other. When calculating the volume of one board, its length, height and net width are taken into account, that is, the width without taking into account the protruding tenon. For example, the size of the board reflected in the figure below is 28x90 mm.
tongue and groove floor board
If the board is 6 meters long, its volume will be:
V = 0.09 m * 0.028 m * 6 m = 0.01512 m³
Quantity in 1 cube:
5. How much wooden lining in 1 cube
The design of the lining vaguely resembles a tongue and groove floor board. It also has a tongue-and-groove connection and ventilation grooves, but the front side of the lining can have bevels, curves and even a convex surface, imitating timber.
For the calculation, the “net” width is used, that is, the size without taking into account the tenon; the maximum value in the cross-section of the board is taken as the height.
Types of lining with a clear example measuring the width and height of the board
The most common lining size is 100x14. With a board length of 6 meters, the number of linings in one cube will be at least 119 pieces:
Volume of one board:
V = 0.1 m * 0.014 m * 6 m = 0.0084 m³
Quantity in 1 cube:
On our website you can get acquainted with the most popular projects of houses made of profiled timber from construction companies presented at the exhibition of houses “Low-Rise Country”.
What else to consider when counting lumber
One of the nuances in the production of lumber is their technological length, that is, the declared six-meter board in practice turns out to be 5-10 cm longer. This deviation is called technological and is not taken into account when calculating the linear meters of the board. The seller under no circumstances has the right to add them to the total length of the board.
When purchasing timber of a certain cross-section, it is important to measure the parameters upon acceptance or loading, since the slightest deviation of even 1 cm leads to huge losses, especially with large purchase volumes.
In addition to volume, it is important to remember the weight of the purchased material, which depends on the density of the material and humidity.
An example of calculating the weight of a beam based on the known density of wood (for materials of different moisture content, you must substitute the appropriate values instead of 860)
Tables for quickly calculating the volume of timber
Below are cheat sheets to quickly find out how much timber is in a cube - the table contains not only quantitative values of units of material per cubic meter, but also volumetric values of timber different sections. For example, the table will show how many boards are in a cube - 6 meters or 3 meters long will a board or timber be.
1. How much timber is 3 meters long in a cubic meter?
| How many pieces in a cubic meter | Volume of one piece, m³ | |
2. How much timber is 6 meters long in a cubic meter?
|
Height, width and length of timber, mm |
How many pieces in a cubic meter |
Volume of one piece, m³ |
If you need to find, for example, how many 100x100 lumber are in a cube, then in the table we look for a board of the required size and see the result - at least 16.67 pieces, and the volume of one lumber 6 meters long is 0.06 m³.
On our website you can find contacts of construction companies that offer house design services. You can communicate directly with representatives by visiting the “Low-Rise Country” exhibition of houses.
3. How many boards are 2 meters long in a cubic meter?
|
How many pieces in a cubic meter |
Volume of one board, m³ |
Area of one board, m² |
||
4. How many boards per cubic meter are 3 meters long?
|
Height, width and length of the board, mm |
How many pieces in a cubic meter |
How many linear meters in one cubic meter |
Volume of one board, m³ |
Area of one board, m² |
5. How many boards per cubic meter are 6 meters long?
The approximate number of boards in a 6 meter cube table shows the following:|
Height, width and length of the board, mm |
How many pieces in a cubic meter |
How many linear meters in one cubic meter |
Volume of one board, m³ |
Area of one board, m² |
When transporting materials, it is important to know not only the length of the product unit, but also the total weight of the cargo being transported, since the carrying capacity of the vehicle is limited by its design features.
6. How many 150x150 timber are in a cubic meter - calculations of weight and volume
|
Height, width and length of timber, mm |
How many pieces in a cubic meter |
How many linear meters in one cubic meter |
Volume of one piece, m³ |
Weight of one piece, kg (humidity 20%) |
Video description
For an example of calculation, see the following video:
Approximate difference in price of 150x150 timber in different regions
The cost of timber depends on the region of the country, type of wood, moisture content of the material, delivery method and many other factors. For comparison, data for timber 150x150x6000 was taken. The type of material is pine. The cost of one cube is presented in the table.
Table. The cost of 1 cube of timber is 150x150x6000 (pine) depending on the region.
Video description
What to look for when purchasing, watch the following video:
Features of lumber storage
To build a house made of wood, it is important to properly store the material so that its humidity is within 12%; if the humidity is higher, the shrinkage of the building will be slower.
Here are a few rules to remember when storing lumber:
The storage area must be level and dry.
To prevent moisture from entering the site onto the site, pallets are placed under the first layer of material, which can be replaced with scraps of boards or sleepers.
The distance between individual products should be maintained at least 2 cm for better air circulation.
After 1-2 rows, crossbars are placed across the length, which can be the same cuttings of boards.
If it is not possible to erect a canopy over the storage area to prevent precipitation from entering, the stacks are covered with film, excluding wrapping the ends, so as not to create a greenhouse effect inside.
Wood stacked for storage
Conclusion
Knowing the rules for calculating the required volume of building materials will help you save time and money, or simply make sure that the developer is conscientious. Therefore, if you do not have the skills to quickly convert one quantity into another, then when discussing the required amount of building materials you should keep with you at least a cheat sheet in the form of a cube table.
Before the beginning construction work any owner land real estate, on which it is proposed to build a residential structure, wants to know how much material is required. Financial costs will depend on the volume of building materials and their type, which can be difficult for some owners to bear at one time, and they are forced to purchase various materials step by step. In low-rise housing construction, wood and products made from it make up a significant part. Therefore, it is advisable to know how many boards will be needed and how much they will cost.
Thanks to accurate calculation number of boards, you can save a lot and not be deceived
Characteristics of wood materials
Currently, the building materials market offers various wood materials at a price in rubles per cubic meter. If it is known how many boards will be needed for arranging the floor, I would like to know their price. In addition, construction requires different kinds wooden products, differing in shape, size and price. Therefore, before studying the question of how many boards are in a cube, it is necessary to study the range of offered wooden products. To build your future home, the future homeowner may need:
- profiled timber of square or rectangular cross-section, the smaller side of which exceeds 100.0 millimeters;
- bar whose dimensions are:
- ü 16.0…75.0 millimeters for products sawn from coniferous wood;
- ü 19.0…100.0 millimeters for hardwood.
- edged board, processed in three planes, with a thickness of more than 20.0 millimeters, the width of which varies widely;
- Not edged board, having two sawn sides, the side edges of which are unprocessed;
- croaker, which is lumber half sawn from round timber ;
- terrace board http://www.ecowood.com.ua/catalog/terrasnaya-doska for flooring.
The greatest financial costs will be required for the purchase of the first three types of lumber, so solving the question of how many timber, whetstones or boards are in a cube is most relevant.
Accurate calculation of the amount of lumber in one cubic meter (1 m³)
The task of determining how many boards are in a cube is at the level of arithmetic tasks solved in the first grade. The initial data for calculating how many timber, bars or boards are in a cube are:
- z – number of boards (pieces);
- h – thickness of the board (smaller sectional size of the bar) in meters;
- b – width of lumber (meters)
- L – length of a unit of lumber (meters).
The volume (V) of one product (board, beam or bar) is determined by the ratio:
V = h×b×L, cubic meters,
and the number of units of lumber per cubic meter is determined as:
Of course, this calculation is quite approximate - it does not take into account the gap between individual products, the type of board processing (grooved, planed), length allowance and other rather specific details. Using the above formulas, it is impossible to calculate the amount of unedged boards or slabs. However, to determine what amount to take with you to the lumber yard, and whether an extra thousand rubles would be a problem there, accuracy is sufficient. More accurate results can be obtained using the tabular calculation method.
Tabular determination of the amount of lumber
To determine how many boards are in 1 cube, the calculation table contains columns and rows. The lines indicate the cross-section of the lumber, and the columns (rows) show the calculated values of the volume of one board and the number of boards in one cubic meter. In principle, these values are obtained by calculation, but taking into account correction factors. Let's consider a cutting (part) of the table of how many boards are in 1 cube. Wherein symbols correspond to those used in the above formulas.
Table for calculating the number of boards in 1 cube
| Board size | Number of pieces per 1 m³ |
| 25 x 100 x 6000 | 66 |
| 25 x 150 x 6000 | 44 |
| 25 x 200 x 6000 | 33 |
| 30 x 100 x 6000 | 55 |
| 30 x 150 x 6000 | 37 |
| 30 x 200 x 6000 | 27 |
| 40 x 100 x 6000 | 41 |
| 40 x 150 x 6000 | 27 |
| 40 x 200 x 6000 | 20 |
| 50 x 100 x 6000 | 33 |
| 50 x 150 x 6000 | 22 |
| 50 x 200 x 6000 | 16 |
Table for calculating the amount of timber in 1 cube
| Beam size | Number of pieces per 1 m³ |
| 25 x 50 x 3000 | 266 |
| 30 x 40 x 3000 | 277 |
| 30 x 50 x 3000 | 222 |
| 40 x 40 x 3000 | 208 |
| 50 x 50 x 3000 | 133 |
| 50 x 50 x 6000 | 66 |
| 50 x 70 x 3000 | 95 |
| 100 x 100 x 6000 | 16 |
| 100 x 150 x 6000 | 11 |
| 100 x 200 x 6000 | 8 |
| 150 x 150 x 6000 | 7 |
| 150 x 200 x 6000 | 5 |
| 200 x 200 x 6000 | 4 |
Calculation table for non-standard boards and timber
| Non-standard timber | Number of pieces per 1 m³ |
| 90 x 90 x 6000 | 20 |
| 90 x 140 x 6000 | 13 |
| 90 x 190 x 6000 | 9 |
| 100 x 250 x 6000 | 6 |
| 100 x 300 x 6000 | 5 |
| 140 x 140 x 6000 | 8 |
| 140 x 190 x 6000 | 6 |
| 150 x 250 x 6000 | 4 |
| 150 x 300 x 6000 | 3 |
| 190 x 190 x 6000 | 4 |
| 200 x 250 x 6000 | 3 |
| 200 x 300 x 6000 | 2 |
| 250 x 300 x 6000 | 2 |
| 300 x 300 x 6000 | 1 |
| Non-standard board | Number of pieces per 1 m³ |
| 22 x 90 x 6000 | 84 |
| 22 x 140 x 6000 | 54 |
| 22 x 190 x 6000 | 39 |
| 25 x 250 x 6000 | 26 |
| 25 x 300 x 6000 | 22 |
| 30 x 250 x 6000 | 22 |
| 30 x 300 x 6000 | 18 |
| 35 x 90 x 6000 | 52 |
| 35 x 140 x 6000 | 34 |
| 35 x 190 x 6000 | 25 |
| 40 x 250 x 6000 | 16 |
| 40 x 300 x 6000 | 13 |
| 45 x 90 x 6000 | 41 |
| 45 x 140 x 6000 | 26 |
| 45 x 190 x 6000 | 19 |
| 50 x 250 x 6000 | 13 |
| 50 x 300 x 6000 | 11 |
| 60 x 100 x 6000 | 27 |
| 60 x 150 x 6000 | 18 |
| 60 x 200 x 6000 | 13 |
| 60 x 250 x 6000 | 11 |
| 60 x 300 x 6000 | 9 |
| 70 x 100 x 6000 | 23 |
| 70 x 150 x 6000 | 15 |
| 70 x 200 x 6000 | 11 |
| 70 x 250 x 6000 | 9 |
| 70 x 300 x 6000 | 7 |
| 80 x 100 x 6000 | 20 |
| 80 x 150 x 6000 | 13 |
| 80 x 200 x 6000 | 10 |
| 80 x 250 x 6000 | 8 |
| 80 x 300 x 6000 | 6 |
When constructing a cottage or house, the master, by necessity, performs many different tasks. He thinks through all the construction processes and draws up the necessary estimates for each of them. Calculate the correct quantity 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 that’s great! He is a real master!
But for an ignorant person, “how many boards are in a cube” is an abstract concept. In order for him to understand it, he must know exactly what it is Construction Materials made of wood. What are they, how are they measured? Without knowing this, he will not be able to adapt to these calculations.
Edged or tongue-and-groove, as well as other types of lumber
The first thing you need to understand is that it is not so important from which forest exactly this or that material was made. The boards may not be the same, but their calculations will be completely identical. Let them have different varieties, various sizes, the calculation is still carried out according to the same principle. It's still wood and will be measured the same way! It can only determine how many boards there are in 1 cube will be different each time. Regardless of whether it is edged or tongue-and-groove, cylindered, etc. the calculation will be the same.
Non-grooved lumber- different timber, edged materials, their non-edged counterparts, this is the case when their cubic capacity is calculated completely differently! These products have grooves and tenons. They are intended for joining between forest units. Such products include:
- blockhouses;
- floor material;
- imitation of various timber.
When purchasing such a grooved one, you should take into account the circumstance. When calculating cubic capacity, you need to take only the working width of the beam. 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 its highest point.
Examples of calculations using formulas for the volume of 1 m3 of timber, as well as price comparison
Any specialist has known since school 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. When making calculations, it is more convenient to immediately convert the parameters into the value “Meter”.
For example, the cubic capacity 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 will calculate is this: V= L*h*b (where L – length, h – height, b – width)
The calculation results in 0.0225 m3. 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 calculations, it turns out that if we miss it, the cube will cost 6,500 rubles. And the price of one of them will be 146 rubles. 25 kopecks Here, for the ignorant people, lies a little trick of the sellers.
Typically, cubic capacity can be rounded to 0.023. This means that lumber will cost the buyer 149 rubles. 50 kopecks Sometimes unscrupulous sellers can round up a cubic capacity with a size of 150x50 mm to approximately 0.05 m3. But if all calculations are performed correctly from the very beginning, it turns out that with 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 involuntarily lead only to the fact that the unit price will already be 325 rubles. instead of 292 rub. 50 kopecks And these calculations are carried out taking into account that the price of a cube is 6,500 rubles.
In addition, you also need to know and take into account that boards with 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. This applies to purchasing more boards.
Everything can be clearly seen from 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 if calculated correctly, this amount is listed as 0.99 m3. In reality, it turns out to be an overpayment for 1 cubic meter. It is approximately 1% of its initial cost. It will look like this: what instead of 6435 rub. for 1 cubic meter the cost will be 6,500 rubles.
The volume of unedged timber is calculated in a completely different way. If you buy one of them, then measure its thickness and length as accurately as with edged lumber. But its width is taken as average. That is, it is between the smallest and the largest. Example: at one end its width is 30 cm, and at the other about 15 cm, then to calculate the cubic capacity this parameter will be 22-23 cm.
If you need to know the volumes large number lumber or determine how many boards there will be in volume, they should be laid out in piles. But so that the widest of them does not differ from the narrowest by more than 10 cm. In such a stack, their length should be the same. But this is only approximately! After this, you need to use a tape measure to measure the height of the stack and its width. These measurements are taken somewhere in the middle, the same applies to length.
The resulting calculation result should be multiplied by a 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 lower the coefficient 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 builders’ textbooks. Similar tables exist for almost all lumber starting from and ending with. They indicate the cubic capacity of common types of timber or other types. And calculating the volume of boards, for example, for a fence, is not difficult! You can use the above formula yourself!
Performing calculations according to the table for timber of standard length 6 meters
We will determine how many pieces of boards are in a cubic volume using a special table
| Size | Volume of 1 piece | Pieces per 1 m³ | m² to 1 m³ |
|---|---|---|---|
| 20×100×6000 mm | 0.012 m³ | 83 pcs. | 50 m² |
| 20×120×6000 mm | 0.0144 m³ | 69 pcs. | 50 m² |
| 20×150×6000 mm | 0.018 m³ | 55 pcs. | 50 m² |
| 20×180×6000 mm | 0.0216 m³ | 46 pcs. | 50 m² |
| 20×200×6000 mm | 0.024 m³ | 41 pcs. | 50 m² |
| 20×250×6000 mm | 0.03 m³ | 33 pcs. | 50 m² |
| 25×100×6000 mm | 0.015 m³ | 67 pcs. | 40 m² |
| 25×120×6000 mm | 0.018 m³ | 55 pcs. | 40 m² |
| 25×150×6000 mm | 0.0225 m³ | 44 pcs. | 40 m² |
| 25×180×6000 mm | 0.027 m³ | 37 pcs. | 40 m² |
| 25×200×6000 mm | 0.03 m³ | 33 pcs. | 40 m² |
| 25×250×6000 mm | 0.0375 m³ | 26 pcs. | 40 m² |
| 30×100×6000 mm | 0.018 m³ | 55 pcs. | 33 m² |
| 30×120×6000 mm | 0.0216 m³ | 46 pcs. | 33 m² |
| 30×150×6000 mm | 0.027 m³ | 37 pcs. | 33 m² |
| 30×180×6000 mm | 0.0324 m³ | 30 pcs. | 33 m² |
| 30×200×6000 mm | 0.036 m³ | 27 pcs. | 33 m² |
| 30×250×6000 mm | 0.045 m³ | 22 pcs. | 33 m² |
| 32×100×6000 mm | 0.0192 m³ | 52 pcs. | 31 m² |
| 32×120×6000 mm | 0.023 m³ | 43 pcs. | 31 m² |
| 32×150×6000 mm | 0.0288 m³ | 34 pcs. | 31 m² |
| 32×180×6000 mm | 0.0346 m³ | 28 pcs. | 31 m² |
| 32×200×6000 mm | 0.0384 m³ | 26 pcs. | 31 m² |
| 32×250×6000 mm | 0.048 m³ | 20 pcs. | 31 m² |
| 40×100×6000 mm | 0.024 m³ | 41 pcs. | 25 m² |
| 40×120×6000 mm | 0.0288 m³ | 34 pcs. | 25 m² |
| 40×150×6000 mm | 0.036 m³ | 27 pcs. | 25 m² |
| 40×180×6000 mm | 0.0432 m³ | 23 pcs. | 25 m² |
| 40×200×6000 mm | 0.048 m³ | 20 pcs. | 25 m² |
| 40×250×6000 mm | 0.06 m³ | 16 pcs. | 25 m² |
| 50×100×6000 mm | 0.03 m³ | 33 pcs. | 20 m² |
| 50×120×6000 mm | 0.036 m³ | 27 pcs. | 20 m² |
| 50×150×6000 mm | 0.045 m³ | 22 pcs. | 20 m² |
| 50×180×6000 mm | 0.054 m³ | 18 pcs. | 20 m² |
| 50×200×6000 mm | 0.06 m³ | 16 pcs. | 20 m² |
| 50×250×6000 mm | 0.075 m³ | 13 pcs. | 20 m² |
Video on calculating lumber in a cube using formulas and tables
There is no construction project that could be completed without the use of lumber.
Therefore, there is a need 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 cubic tables.
Note that we are considering products made from softwood.
What is cubic capacity
In general, this is the volume of a body, expressed in cubic measures.
The cubic capacity 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 obtained when cutting a log.
Obapole and croaker
For some reason, there is confusion with the definition of these materials: some claim that they are one and the same thing, and others claim that both sexes are made from slabs.
The proposed table will provide complete clarity.
As can be seen from the table, both sexes are not used in construction, so we will not consider it further.
The requirements for slab are standardized in accordance with OST 13-28-74. This means that croaker is a valuable building material.
The croaker is used:
- for installing a subfloor;
- roof sheathing;
- production of formwork.
Unedged board
It is sawn along two opposite surfaces, called layers. The edges are left uncut, hence the name.
Her standard sizes the following: thickness - 25, 40 and 50 mm; length - 6 m.
The scope of application is wider than that of the slab.
Also used for construction:
- warehouses;
- utility rooms;
- temporary fences;
- awnings
In addition, it can serve as a base for clapboard cladding, block house and other finishing materials.
Edged board
It differs from unedged in that it is propylene along the faces and edges.
Used as:
- roof sheathing;
- wall lathing frame houses;
- racks and braces of frame houses;
- stairs;
- material for making country furniture etc.
timber
This is lumber with a thickness of 100 mm or more with a difference in cross-sectional width and height of no more than twice. Usually the timber is of square 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 posts and beams;
- as a material for external and interior walls wooden houses;
- for the construction of stairs, fences, etc.
Bar
It differs from timber in that maximum size its cross-section is 75 mm. Like timber, it is most often made with a square cross-section.
Is used for interior work such as device:
- stairs;
- railing;
- window sills;
- bases for finishing cladding;
- roof counter-lattices.
How to calculate the number of boards in a cube
Edged board
As you know from the course high school, volume rectangular parallelepiped(and an edged board, beam and block are exactly that) is equal to the product of the lengths of its sides.
Calculated using formula 1:
where: V – volume; L – length; b – width; h – height (in our case 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 one by the resulting number (formula 2):
where: N – number of pieces, 1 – 1 cubic meter. m, V – volume.
We should not forget that the dimensions of edged materials are given in millimeters, so before calculation 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, convert millimeters to meters and substitute the resulting values into formula 1:
V = 0.025 × 0.15 × 6 = 0.0225
We 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, so when calculating the volume, you need to substitute the average width into formula 1: these two widths are added and the resulting amount is divided in half.
The measurement result is rounded to the nearest 10 mm, fractions up to 5 mm are not taken into account, and fractions of 5 mm or more are considered 10 mm.
In addition, uncut edges do not allow the board to be stacked tightly, and various increasing factors are used to calculate the exact volume.
The calculation method is not so much complicated as it is tedious, so it is easier to use the table from the next section.
Tongue and groove boards and lining
They differ from each other only in size, so the calculation method for them is the same.
They are mounted using the tongue and groove system, as shown in the figure.
For width b in in this case the so-called “working” or “visible” width is accepted - the distance from the base of the tongue to the edge of the board (see figure). 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 cube 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 timber
Unedged material
Due to the wide range of sizes in length, thickness and width, it is impossible to calculate the exact amount of slab in one cube, so there is no cubature table for it.
Here is a table for converting the folded volume of a slab into a dense one.
In this case, we solve the inverse problem: we determine the actual volume of a known amount of slab.
To do this you need:
- Disassemble the slab into debarked (from which the thickest end closest to the tree root has been removed) and unbarked.
- Sort by length - up to 2 meters and more than 2 meters.
- If necessary, sort by thickness.
- Place in a bag, alternating thin and thick ends.
- Calculate the folded volume of the package.
- Select the appropriate coefficient from the table and determine the actual (dense) volume.
Cube for unedged boards.
Coverage area calculation
When the main construction is completed, it's time to start finishing works: sheathe walls and lay clean floors.
To do this, remember formula 1. When calculating the volume of one element, we write down the intermediate result - the product:
where S is the area of this element.
Having calculated the quantity using formula 2, we multiply the result by the area.
Video
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