Before the beginning construction works any owner of land real estate on which it is planned 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 a 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 large part. Therefore, it is desirable 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 how many boards are needed for arranging the floor, I would like to know their price. In addition, the 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 proposed wooden products. A future homeowner, in order to build his future home, may need:
- profiled beam of square or rectangular section, the smaller side of which exceeds 100.0 millimeters;
- bar whose size is:
- ü 16.0 ... 75.0 millimeters for sawn wood products conifers;
- ü 19.0 ... 100.0 millimeters for hardwood.
- edged, processed in three planes, a board with a thickness of more than 20.0 millimeters, the width of which varies widely;
- unedged board, having two sawn sides, the side edges of which are unfinished;
- slab, which is half sawn timber 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 the solution to the question of how much timber, bar or boards 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 in a cube is at the level of arithmetic tasks solved in the first grade. The initial data for calculating how many beams, bars or boards in a cube are:
- z is the number of boards (pieces);
- h is the thickness of the board (the smaller section of the bar) in meters;
- b - lumber width (meters)
- L is the length of a lumber unit (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 lumber units in a cubic meter is defined 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 little things. Using the above formulas, it is impossible to calculate the amount of edged board or croaker. However, to determine how much to take with you to the lumberyard, and whether an extra thousand rubles will interfere there, accuracy is enough. 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 lines. 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 were obtained by calculation, but taking into account correction factors. Consider a clipping (part) of the table how many boards are in 1 cube. Wherein conventions correspond to those used in the above formulas.
Table for calculating the number of boards in 1 cube
| Board size | Number of pieces in 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 in 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
| Beam non-standard | Number of pieces in 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 |
| Board non-standard | Number of pieces in 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 |
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, replace part wooden structures, for example, rafters, logs, battens, for example, on plastic or metal, it is impossible, or economically unprofitable.
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 bill is already going to 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 should those who build small house with 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 the majority of companies that sell lumber sell them in cubic meters. If you buy, for example, boards by the piece in hardware store- there the final price 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 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
|
Boards |
||
| Board size | Number of boards in 1 cube | The volume of wood in 1 board, cubic meters |
| 25 x 100 x 6000 | 66 pcs | 0.015 |
| 25 x 150 x 6000 | 44 pcs | 0.0225 |
| 25 x 200 x 6000 | 33 pcs | 0.03 |
| 30 x 100 x 6000 | 55 pcs | 0.018 |
| 30 x 150 x 6000 | 37 pcs | 0.027 |
| 30 x 200 x 6000 | 27 pcs | 0.036 |
| 40 x 100 x 6000 | 41 pcs | 0.024 |
| 40 x 150 x 6000 | 27 pcs | 0.036 |
| 40 x 200 x 6000 | 20 pcs | 0.048 |
| 50 x 100 x 6000 | 33 pcs | 0.03 |
| 50 x 150 x 6000 | 22 pcs | 0.045 |
| 50 x 200 x 6000 | 16 pcs | 0.06 |
| bars | ||
| Beam size | The number of timber in 1 cube | The volume of wood in 1 bar, cubic meters |
| 25 x 50 x 3000 | 266 pcs | 0.00375 |
| 30 x 40 x 3000 | 277 pcs | 0.0036 |
| 30 x 50 x 3000 | 222 pcs | 0.0045 |
| 40 x 40 x 3000 | 208 pcs | 0.0048 |
| 50 x 50 x 3000 | 133 pcs | 0.0075 |
| 50 x 50 x 6000 | 66 pcs | 0.015 |
| 50 x 70 x 3000 | 95 pcs | 0.0105 |
| 100 x 100 x 6000 | 16 pcs | 0.06 |
| 100 x 150 x 6000 | 11 pcs | 0.09 |
| 100 x 200 x 6000 | 8 pcs | 0.12 |
| 150 x 150 x 6000 | 7 pcs | 0.135 |
| 150 x 200 x 6000 | 5 pieces | 0.18 |
| 200 x 200 x 6000 | 4 things | 0.24 |
The master must not only be fluent in certain skills in his own profile, but also be able to calculate the amount of material for certain work. For example, a bricklayer would do well to quickly calculate necessary minimum bricks or blocks, and the builder working with wood - the number of boards.
The lack of elementary mathematical skills does not honor the master, who does not know how many pieces of timber or how much wood he will need. In a period of high prices, customers do not want to pay for unnecessary goods, which will then lie dead in the pantry. In the same way, the client will doubt the ability of the builders if they buy too little lumber, because re-delivery is an extra cost.
The minimum set of mathematical knowledge
In order to correctly determine the amount of material that will be needed in the process of work, another 15% is added to the calculated number (length, area, volume). That is, if 2 cubes of boards are required for construction, then you need to buy 2 + 0.15x2 = 2.3 cubes. In this case, you do not have to go for the missing wood. It is assumed that the calculations were carried out correctly.
- The area (S) is calculated by elementary multiplication of length by width. If the area of the room is 5 by 3 m, then S \u003d 5x3 \u003d 15 (m²).
- Volume (V) is found by multiplying the area by the height: V=Sхh or by multiplying three linear dimensions (length, width, height).
- The volume of the same room 5 m by 3 m at a height of 2.7 m will be V = 15x2.7 = 40.5 (m³) or 5x3x2.7 = 40.5 (m³).
- If you want to find V of a beam with a section of 150x150 6 m, then we multiply its dimensions, having previously expressed them in meters. 150 mm = 0.15 m. V = 0.15x0.15x6 = 0.135 (m³).
- With a beam length of 4 meters, we have a different result: V \u003d 0.15x0.15x4 \u003d 0.09 (m³).
How many pieces of timber are contained in one cube?
For someone who owns the formulas described above, the calculations will not cause difficulties. Finding out how much timber is in a cube is very simple: you need to divide 1 cube by the volume of 1 timber. Example:
1. Timber size 150x150x6000. The volume of 1 bar is 0.135 m³, so there will be 1 / 0.135 = 7.407 pieces in the cube.
2. With dimensions of 100x150x6000, we carry out calculations: 1 product - 0.1x0.15x6 \u003d 0.09 m³, respectively, a cube - 1 / 0.09 \u003d 11.11 pcs.
3. 100x100x6000. 1 product - 0.1x0.1x6 \u003d 0.06 m³, cube - 1 / 0.06 \u003d 16.666 pcs.
It makes no sense to carry out calculations every time if at hand there is a table of the number of timber in a cube for 4.5, 6 and 7 meters - the most common lengths. They give rounded to hundredths of the number of boards of sections from 100x100 to 200x200 in increments of 50 mm. But for a length of 4 meters, you can make a table yourself, then formulas come to the rescue, as in any other non-standard case.
| Dimensions, mm | Volume 1 piece m³ | Number of pieces in 1 cube |
|
Length 4 meters |
||
| 100x100 | 0,04 | 25 |
| 100x150 | 0,06 | 16,67 |
| 100x200 | 0,08 | 12,5 |
| 150x150 | 0,09 | 11,11 |
| 150x200 | 0,12 | 8,33 |
| 200x200 | 0,16 | 6,25 |
|
Length 6 meters |
||
| 100x100 | 0,06 | 16,67 |
| 100x150 | 0,09 | 11,11 |
| 100x200 | 0,12 | 8,33 |
| 150x150 | 0,135 | 7,41 |
| 150x200 | 0,18 | 5,56 |
| 200x200 | 0,24 | 4,17 |
A few nuances:
1. The calculation for all materials with grooves, spikes and other fastening systems is carried out only on the working surface.
2. Upon purchase required amount boards, you need to follow the rounding carried out by the seller. With the price of one cubic meter of 6-10 thousand rubles, even 0.01 cubic meters will "tighten" by 60-100 rubles, not to mention more significant "errors" on the part of the manager.
3. Having a table for calculating the timber on hand, the buyer will protect himself in case the sale is per m³, and the seller will have 15 boards instead of 16.67 in 1 cubic meter with dimensions, for example, 100x100x6000.
Price table
In the assortment of many suppliers, all standard sections of timber are available. In this case, they simply do not indicate specific dimensions.
| Name | Dimensions (mm), length - 6 meters | Price per rub/m³ |
| edged GOST 8486-86, needles | 100x150 | 6 300 – 7 500 |
| trimmed, needles | 100x100 | 6 350 |
| edged, T/U | 150x150 | 4 700 – 5 100 |
| cedar, natural humidity | 150x150 | 9 500 – 16 800 |
| larch, natural humidity | 150x150 | 9 800 |
| edged, needles, planed | 75x150 | from 7 200 |
| rough, needles | length 2-6 m, all sections | 6 200 |
| profiled dry, pine | 150x150 | from 7 800 |
| profiled dry, pine | 140x185 | 12 000 |
Buying materials by eye is nonsense, and no self-respecting owner will do this. In order to competently draw up an estimate and estimate how much the construction or overhaul, you need to determine how much this or that product will be needed. It is more difficult with boards - they are not sold by the piece, but are released (as well as stored) in batches, the volume of which is expressed in m³. But the number of pieces, as a rule, is “tied” to the covered area, that is, to m². Let's figure out how to determine how many boards will be in one cube.
Why boards exactly 4 and 6 meters? The calculation method given below does not change for any length. The fact is that the indicated parameters are the most “running”. Manufacturers are guided by the dimensions of platforms and freight cars, so it is more profitable for them to supply boards with a length of 6 m. But the buyer is more interested in boards of four meters in length, since a truck with an extended body is enough to transport them.To transport 6 meter boards, you need a road train; This means that the cost of delivering lumber to the site will increase. And the maneuverability of such vehicles is significantly limited. For example, it makes no sense to deliver boards on it to a summer cottage, given the narrowness of the lanes.
The procedure for calculating the number of boards in a cube
You just need to remember high school. The so-called "cube" (a common name for a measure of volume) is the product of the linear parameters of any volumetric object. That is, its length, width and height (in this case, thickness).
- The edges of one of the boards in the stack are measured. It turns out the width and thickness. The length is known - 4 or 6 m.
- All measured parameters are converted into one dimension. Since we are talking about a cube, that is, m3, then all of them (including width and thickness) are indicated in meters.
- The "cubic capacity" of the workpiece is determined.
- 1 m³ is divided by the resulting value. The result is the number of boards in the cube.
In the numerator of the fraction, it is not necessary to put exactly 1. The warehousing of boards is done in different ways, and lumber in such quantities is not always required. If there are 0.8 cubic meters in a stack, then this is its volume.
Example. A board is bought 6 m, 25 mm, 20 cm wide, in the amount of one cube.- We make the conversion of values in meters: thickness - 0.025, width - 0.2.
- We determine the cubature of the board: 6 x 0.2 x 0.025 \u003d 0.03 m³.
- We calculate the number of samples - 1: 0.03 = 33, (3).
Calculator for calculating the amount and volume of lumber
If the received value is a fractional value, then the result is always rounded up to an integer value. That is, only the numbers before the decimal point are taken into account. This is the accepted norm!
These tables will help you determine the approximate number of boards in a cube without resorting to calculations.
- The calculation algorithm is the same for all lumber of this group, regardless of their characteristics - wood species, degree of drying.
- Table values are purely indicative, as they do not quite correctly reflect the actual number of boards in a cube. Firstly, a lot depends on the stacking, that is, how tightly the boards fit. Secondly, nothing is said about the quality of processing of blanks (whether they are edged or not). Thirdly, it is not a fact that, upon careful examination, a certain number of boards will not be rejected due to defects found. Therefore, it is always necessary to slightly reduce their number obtained by calculation. If the board is edged - by about 10%, in the case of unedged - by 15 - 20%.
During construction frame house the main material is a wooden beam. It is needed not only to create the frame of the house, but also for the construction of the roof, when installing the crowns of the log house, arranging internal partitions and other building structures. Due to the wide range of uses of wood, this construction material has tens and hundreds of positions that regulate the size of the product. Knowing the exact dimensions of one unit, it is possible, without going into complex calculations, using simple formulas to calculate how many pieces of a 6-meter beam fit in 1 m 3 - to make an estimate and optimize logistics operations for the delivery and storage of lumber at the construction site.
Features of lumber calculations in different units
The volume of any physical rectangular object is the result of multiplying the length, width and height of the rectangle, in our case - wooden beam. Volume V \u003d a x b x c, where the symbols: a is the length, b is the width, and c is the height of the beam. For example, a product 6 meters long, 10 cm wide and 10 cm high will have a volume of 0.06 m 3. But this is an ideal mathematical formula, and in practice, products in one batch may have different sizes, which is allowed by the standards, but complicates the calculation of the volume of lumber.
Edged or profiled timber is much more expensive than regular timber, so the accuracy of the calculations is crucial - you will have to pay from your wallet. The traditional system of measurements when buying lumber is a cubic meter, but for beams for rafters, wall frames, floor beams and wood for flooring, it is more convenient to use linear meters. Also, the features of production in the woodworking industry allow some variation in size, in particular, length, which can vary between 3-6 meters in 50 cm increments. 
Miscellaneous units measurements and different approaches in calculating the required amount of timber can generate errors and inaccuracies, as well as cause a general misunderstanding of the situation - how to convert the given units to others.
- For example, a product with a section of 100 x 50 mm is required, and the total length of the lot is known - 100 p / m ( running meters). To find out the volume of a beam, it is necessary to calculate the cross-sectional area of \u200b\u200bone unit, and for this mm convert to m 2, then multiply the cross-sectional area "S S" and the length "a": 0.1 x 0.05 x 100 \u003d 0.50 m 3 . It is easier to calculate the cost of a batch - you need to multiply the volume of the batch by the price per 1 m 3.
- Or how to find out how many units of timber will be obtained in a certain volume of lumber? To do this, you need to know both the cross section and the length of one unit. For example, if there is data on the total length of the batch - 100 p / m, and a product with a length of 4 m is required, then how many pieces will there be in this batch? First, the volume of one product is calculated: 0.1 x 0.05 x 4 \u003d 0.02 m 3. When purchasing 0.5 m 3 of timber, 25 units are obtained, or 50 pieces per 1 m 3.
IN individual construction every ruble counts, so ordering, for example, 4 m 3 of edged or profiled timber, if you need 3.8 m 3, is uneconomical.
Example: when buying 52 p / m lumber with a section of 100 x 180 mm and a length of 6 meters, the total volume of the beam will be: 52 x 0.1 x 0.18 \u003d 0.936 m 3. You can find out the number of pieces in this volume as follows: divide the total volume by the volume of one unit. We find out the volume of one product: 0.1 x 0.18 x 6 m / n \u003d 0.108 m 3. Last calculation: 0.936 / 0.108 = 8.666 units. Since no one will cut lumber in the store, it's easier to pay this small difference for one unit than to buy the whole lot with the difference in price multiplied by the number of pieces in the lot.
Profiled timber, although of a more complex shape, is calculated using the same formulas. That is, to calculate the cross-sectional area of the profiled product, the height "c" must be multiplied by the width "b". The height of the profiled beam is defined as the distance from the bottom surface with the groove to the top of the tenon.
When calculating the number of units of lumber in 1 m 3, already when buying it, you need to measure the real section of any product with a tape measure to make sure that you do not have to overpay. A difference of even 0.5 cm is a rather significant blow to the family budget.
There is such a production concept as a technological deviation in length. This error can reach 4-6 cm for one unit, since the logs do not end when sawing. Therefore, the seller should be reminded of this so that he does not add payment for a non-existent length of material when calculating the total amount. If during the construction of a frame house you need to know how much 150x150 timber in a cube, the table below will help you make quick and accurate calculations.
Number of profiled and edged timber in 1 cubic meter:
| Width, height, length in m | Volume 1 pc. in m 3 | Units in 1m 3 |
| 0.10 x 0.10 x 6 | 0,06 | 16 |
| 0.10 x -0.15 x 6 | 0,09 | 11 |
| 0.15 x 0.15 x 6 | 0,135 | 7 |
| 0.1 x 0.18 x 6 | 0,108 | 9 |
| 0.15 x 0.18 x 6 | 0,162 | 6 |
| 0.18 x 0.18 x 6 | 0,1944 | 5 |
| 0.10 x 0.20 x 6 | 0,12 | 8 |
| 0.15 x 0.20 x 6 | 0,18 | 5 |
| 0.18 x 0.20 x 6 | 0,216 | 4 |
| 0.20 x 0.20 x 6 | 0,24 | 4 |
| 0.25 x 0.20 x 6 | 0,3 | 3 |
| 0.25 x 0.25 x 6 | 0,375 | 2 |
| 0.25 x 0.30 x 6 | 0,45 | 2 |
| 0.30 x 0.30 x 6 | 0,54 | 1 |
To find out how much timber is in a cube, the table is presented below:
| Width, height, length in m | The volume of one unit |
| 0.10 x 0.10 x 6 | 0,06 |
| 0.10 x -0.15 x 6 | 0,09 |
| 0.15 x 0.15 x 6 | 0,135 |
| 0.1 x 0.18 x 6 | 0,108 |
| 0.15 x 0.18 x 6 | 0,162 |
| 0.18 x 0.18 x 6 | 0,1944 |
| 0.10 x 0.20 x 6 | 0,12 |
| 0.15 x 0.20 x 6 | 0,18 |
| 0.18 x 0.20 x 6 | 0,216 |
| 0.20 x 0.20 x 6 | 0,24 |
| 0.25 x 0.20 x 6 | 0,3 |
| 0.25 x 0.25 x 6 | 0,375 |
| 0.25 x 0.30 x 6 | 0,45 |
| 0.30 x 0.30 x 6 | 0,54 |
Simplified formulas for calculating lumber 0.15 x 0.15 x 6 m:
- Volume 1 piece: 0.15 x 0.15 x 6 - = 0.135 m 3.
- Pieces in 1 m 3: 1 / 0.135 = 7 pcs.
The final and correct calculation implies that 12-15% is added to the result.
Necessary primary knowledge for calculations
A few simple formulas will help the developer do without intermediaries in calculating the amount and volume of wood for building a house:
- The area of the product S is the result of multiplying the length (a) and width (b) of the wood product;
- Volume V is the result of multiplying area S and height c, or multiplying a - length, b - width, and c - height;
Calculation features:
- The calculation for wood products with grooves, spikes and other complex geometric surfaces is carried out on the working plane;
- When purchasing a certain amount of wood, control the rounding that the seller makes when calculating the cost of the purchase. So, at a cost of 1 m 3 within 10,000 rubles, such an “insignificant miscalculation” as 0.005 m 3 will increase your costs by 30-50 rubles. Naturally, no one takes into account such small errors, but larger values will lead to higher costs.
- When buying wood, it is recommended to have the data of the above tables with you in order to exclude even unintentional cases of incorrect calculation and overpayment.
