An unedged board has a large spread in width at opposite ends, therefore, when calculating an unedged board, the average width must be substituted into the formula. The average width of unedged boards is measured in the middle of the length as half the sum of the widths of both layers (ends of the board), excluding bark and bast. The measurement result is rounded to 10 mm, fractions up to 5 mm are not taken into account, and fractions of 5 mm or more are considered 10 mm.
Unedged board: what is it
Unedged planks are the first planks removed from the trunk. Its Edges are not cut off and have wane, which is unacceptable for edged boards. Unedged boards have bark on the side edges. The first board removed from the trunk has the most bark. The standard thickness of unedged boards is 25, 40, 50 mm, and the length is 6 m. Unedged boards are the cheapest of all boards. Therefore, they are used for scaffolding, sheathing, roof battens, structural components, flooring, subfloors, firewood. In order to prevent unedged boards from starting to rot, you need to remove the bark from them, dry them and treat them with an antiseptic.
When carrying out construction work on the construction of a residential building, a specialist needs to perform a large number of various tasks, some of which are: drawing up and calculating the estimated cost before finishing the premises of a residential building. V mandatory, to calculate the required amount of various building materials, which is quite difficult to do. Therefore, such knowledge - how many boards are in a cube - is very important for a specialist who is engaged in the construction of a residential building and wants to do the work as efficiently and quickly as possible in time.
Buyer's club: existing types of boards
To calculate exactly how many pieces of boards are in a cube, you need to know not only what exactly a cube of a board means, but it is worth understanding important point that exist different kinds boards and what is the opportunity to purchase on modern market for a variety of construction work. It should be noted that the cube of almost all materials, regardless of the type of material, is calculated in the same way, that is, according to one specific method. The types of boards have no influence on the calculation of the cubic capacity of this building material.
The non-grooved type of lumber are: timber, various edged boards, as well as unedged boards (they are an exception when calculating the cubic capacity, because this process takes place a little differently). The grooved types (which have special grooves for making a joint) include: modern lining, blockhouse, floor material, as well as imitation of natural timber. When you choose a grooved type of building material for purchase, then you will need to pay attention to the fact that when calculating, only the working width of the board is used without a spike. If we talk about a blockhouse (imitation of a log), then when calculating the cubic capacity, only the thickness at its highest point is taken.
What is the number of boards in 1 cube: calculation
Any person, even from his school days, understands how the cubic capacity is calculated. For this procedure, it is necessary to calculate quantities such as: length, width and height. A similar principle is used to calculate the cubic capacity of 1 board. When performing such calculations, it is recommended to convert all available values to meters. Cubic capacity of 1 board, which has a section of 150x20 mm. and a length of 6 m, it is calculated as follows: 0.15 is multiplied by 0.02 and 6, so that the cubic capacity of this board will be 0.018 cubic meters.
Apply the volume formula V = L * h * b (where L is length, h is height, b is width).
L = 6.0; h = 0.02; b = 0.15.
Thus, V = 6.0 * 0.02 * 0.15 = 0.018 m 3.
To determine how many boards are in one cube: divide 1 m 3 by cubic capacity (the volume of one board).
1 m 3 / V = N pcs.
1 m 3 / 0.018 m 3 = 55.55 pcs.
Thus, the number of boards in one cube is 55.5 pieces.
It is quite easy to find out the cost of a certain type of board when the values of its volume are known: 0.018 is multiplied by the price of 1 cubic meter. When 1 cube of a certain type of board has, for example, a cost of 5500 rubles, then the cost will be 99 rubles. At this point in the calculation, there is some trick of salespeople and managers in hardware stores, because the volume of the material is rounded up to some whole values.
Such rounding can lead to such a moment that the price of 1 board (when 1 cube costs 5500) will be completely different values. In addition to all this, it should be noted that for various boards for construction, which have a nominal length of 6 meters, in fact, the length is 6.1 - 6.2 m, which is not taken into account when selling this building material. This also applies to the acquisition of a significant number of boards. This is quite clearly seen if, for example, a 150x20 mm board is used. The number of boards in a cube is 55.5 pieces. But, in a cube, 55 pieces are considered, that when the calculation is made, there will be a value of 0.99 cubic meters. In fact, it follows from this that the overpayment for 1 cubic meter of this popular building material can be 1% of the real price. For example, 5500 instead of 4995 rubles.
To calculate the cubic capacity for a non-cut type of board, slightly different methods are used. When it comes to buying 1 board, then the measurement of its thickness, as well as the total length, is carried out in the same way as when choosing an edged building material. In this case, the width for calculations is taken as averaged - between great value and small.
For example, when at the end the width of the board is 25 cm, and at the other 20, then the average value will be approximately 22 centimeters. When it is necessary to calculate the volume of a significant number of such boards for construction, then it will be necessary to expand them so that the wide one does not differ from the narrow one, more than 10 cm. The main length of this material in the laid out pile should be approximately the same. After that, using a regular tape measure, an accurate measurement of the height of the entire available stack of boards is made, the width is measured (approximately in the middle). The result obtained will then need to be multiplied by a special factor, which is a value from 0.07 to 0.09, in direct proportion to the existing air gap.
How many boards are in 1 cube: special tables
To calculate exactly how many boards of a certain width, length in 1 cubic meter, various tables are used. Below are several such specialized tables, which indicate the cubic capacity of the types of this material common and in demand today. It is possible to calculate the volume of various boards having different sizes, for example, material for erecting a fence on your site, using the existing formula, which is presented above.
Table of the number of edged boards in 1 cubic meter
| Board size | Volume of the 1st board (m 3) | Number of boards in 1m 3 (pcs.) | Number of square meters in 1m 2 |
|---|---|---|---|
| Twenty | |||
| Board 20x100x6000 | 0.012 m 3 | 83 Item (s) | 50 m 2 |
| Board 20x120x6000 | 0.0144 m 3 | 69 pcs. | 50 m 2 |
| Board 20x150x6000 | 0.018 m 3 | 55 pcs. | 50 m 2 |
| Board 20x180x6000 | 0.0216 m 3 | 46 pcs. | 50 m 2 |
| Board 20x200x6000 | 0.024 m 3 | 41 Item (s) | 50 m 2 |
| Board 20x250x6000 | 0.03 m 3 | 33 pcs. | 50 m 2 |
| Twenty-five | |||
| Board 25x100x6000 | 0.015 m 3 | 67 pcs. | 40 m 2 |
| Board 25x120x6000 | 0.018 m 3 | 55 pcs. | 40 m 2 |
| Board 25x150x6000 | 0.0225 m 3 | 44 pcs. | 40 m 2 |
| Board 25x180x6000 | 0.027 m 3 | 37 pcs. | 40 m 2 |
| Board 25x200x6000 | 0.03 m 3 | 33 pcs. | 40 m 2 |
| Board 25x250x6000 | 0.0375 m 3 | 26 pcs. | 40 m 2 |
| Thirty | |||
| Board 30x100x6000 | 0.018 m 3 | 55 pcs. | 33 m 2 |
| Board 30x120x6000 | 0.0216 m 3 | 46 pcs. | 33 m 2 |
| Board 30x150x6000 | 0.027 m 3 | 37 pcs. | 33 m 2 |
| Board 30x180x6000 | 0.0324 m 3 | 30 pcs. | 33 m 2 |
| Board 30x200x6000 | 0.036 m 3 | 27 pcs. | 33 m 2 |
| Board 30x250x6000 | 0.045 m 3 | 22 pcs. | 33 m 2 |
| Thirty-two | |||
| Board 32x100x6000 | 0.0192 m 3 | 52 Item (s) | 31 m 2 |
| Board 32x120x6000 | 0.023 m 3 | 43 Item (s) | 31 m 2 |
| Board 32x150x6000 | 0.0288 m 3 | 34 pcs. | 31 m 2 |
| Board 32x180x6000 | 0.0346 m 3 | 28 pcs. | 31 m 2 |
| Board 32x200x6000 | 0.0384 m 3 | 26 pcs. | 31 m 2 |
| Board 32x250x6000 | 0.048 m 3 | 20 pcs. | 31 m 2 |
| Fortieth | |||
| Board 40x100x6000 | 0.024 m 3 | 41 Item (s) | 25 m 2 |
| Board 40x120x6000 | 0.0288 m 3 | 34 pcs. | 25 m 2 |
| Board 40x150x6000 | 0.036 m 3 | 27 pcs. | 25 m 2 |
| Board 40x180x6000 | 0.0432 m 3 | 23 pcs. | 25 m 2 |
| Board 40x200x6000 | 0.048 m 3 | 20 pcs. | 25 m 2 |
| Board 40x250x6000 | 0.06 m 3 | 16 pcs. | 25 m 2 |
| Fifty | |||
| Board 50x100x6000 | 0.03 m 3 | 33 pcs. | 20 m 2 |
| Board 50x120x6000 | 0.036 m 3 | 27 pcs. | 20 m 2 |
| Board 50x150x6000 | 0.045 m 3 | 22 pcs. | 20 m 2 |
| Board 50x180x6000 | 0.054 m 3 | 18 pcs. | 20 m 2 |
| Board 50x200x6000 | 0.06 m 3 | 16 pcs. | 20 m 2 |
| Board 50x250x6000 | 0.075 m 3 | 13 pcs. | 20 m 2 |
Table of the amount of timber in 1 cubic meter
| Timber size | Volume of 1 piece (m³) | The amount of timber in 1m³ (pcs.) |
|---|---|---|
| 100 × 100 × 6000 | 0.06 m 3 | 16 pcs. |
| 100 × 150 × 6000 | 0.09 m 3 | 11 pcs. |
| 150 × 150 × 6000 | 0.135 m 3 | 7 pcs. |
| 100 × 180 × 6000 | 0.108 m 3 | 9 pcs. |
| 150 × 180 × 6000 | 0.162 m 3 | 6 pcs. |
| 180 × 180 × 6000 | 0.1944 m 3 | 5 pieces. |
| 100 × 200 × 6000 | 0.12 m 3 | 8 pcs. |
| 150 × 200 × 6000 | 0.18 m 3 | 5.5 pcs. |
| 180 × 200 × 6000 | 0.216 m 3 | 4.5 pcs. |
| 200 × 200 × 6000 | 0.24 m 3 | 4 things. |
| 250 × 200 × 6000 | 0.3 m 3 | 3 pcs. |
Table of the number of unedged boards in 1 cubic meter
Buying materials by eye is nonsense, and no self-respecting owner will do this. In order to competently make an estimate and estimate how much the construction will result in or overhaul, you need to determine how much you need this or that product. It is more difficult with boards - they are not sold by the piece, but released (as well as stocked) in batches, the volume of which is expressed in m³. But the number of pieces, as a rule, is "tied" to the area to be covered, that is, to m². Let's figure out how to determine how many boards there will be in one cube.
Why boards are exactly 4 and 6 meters? The calculation methodology given below does not change for any of their lengths. The fact is that the indicated parameters are the most "popular" ones. 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 elongated body is enough for their transportation.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 a transport is significantly limited. For example, it makes no sense to deliver boards on it to a suburban area, 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" (the 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).
- A measurement is made of the edges of one of the boards in a stack. 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 obtained value. The result is the number of boards per cube.
The numerator of the fraction does not have to be exactly 1. Planks are stored in different ways, and lumber in such an amount 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, by 25 mm, 20 cm wide, in the amount of one cube.- We convert the values into meters: thickness - 0, 025, width - 0.2.
- Determine the cubic capacity of the board: 6 x 0.2 x 0.025 = 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 fractional, then the result is always rounded to the nearest whole value. That is, only the numbers in front of the comma 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 sawn timber of this group, regardless of their characteristics - wood type, degree of drying.
- The tabular values are purely indicative, since they do not quite correctly reflect the real 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 workpieces processing (whether they are edged or not). Thirdly, it is not a fact that upon careful inspection a certain number of boards will not be rejected due to detected defects. Therefore, it is always necessary to slightly reduce the number obtained by calculation. If the board is edged - by about 10%, in the case of unedged - by 15 - 20%.
In the process of private construction, such as a house, garage or summer cottage, probably no builder can do without lumber. Even if the house is being built from the most fashionable and modern materials, replace part wooden structures, for example, rafters, logs, lathing, for example, for plastic or metal is impossible, or economically unprofitable.
To build a small house or bathhouse, you will probably need at least a few cubic meters of sawn timber. different sizes and sections, starting from boards and ending with a bar and slats. If the construction is large enough, then the timber count is already in tens of cubic meters.
On 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 a construction site, but what about those who are building a small house with a limited budget?
If he buys more lumber than he needs, where do the leftovers go? In order to help these people in calculating lumber and their quantity, we decided to write this article. We proceeded from the fact that for small construction sites, lumber is counted either by the piece or by footage, therefore, the tables in the mandatory size indicate the cross-section of the boards and bars, as well as their length. The volume of specific lumber in cubic meters is also indicated.
This is done so that a person can count the right amount boards or bars in cubic meters, since in the bulk of the firms that sell lumber they release them in cubic meters. If you buy, for example, boards by the piece in a hardware store - there the final price will be 1.5 - 2 times higher, which is absolutely unprofitable for the buyer.
In addition, we have provided data for the so-called non-standard sawn timber, because many companies cut timber according to the customer's size and these dimensions may differ from the standard ones (usually this is dictated by questions of economy or design features of the structure being built).
Indicating the number of lumber in one cube, we gave the figure 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 number.
For private construction, information on the number of boards or bars in one cube is very useful. Buying several cubes of boards, 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 number.
Lumber calculation table
|
Planks |
||
| Board size | Number of boards in 1 cube | Wood volume in 1 board, cubic meters |
| 25 x 100 x 6000 | 66 pc | 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 pc | 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 | ||
| Timber size | The amount of timber in 1 cube | The volume of wood in 1 bar, cubic meters |
| 25 x 50 x 3000 | 266 pc | 0.00375 |
| 30 x 40 x 3000 | 277 pc | 0.0036 |
| 30 x 50 x 3000 | 222 pc | 0.0045 |
| 40 x 40 x 3000 | 208 pc | 0.0048 |
| 50 x 50 x 3000 | 133 pc | 0.0075 |
| 50 x 50 x 6000 | 66 pc | 0.015 |
| 50 x 70 x 3000 | 95 pc | 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 |
It would seem, why you need to know how many boards there are in one cubic meter? Indeed, with large construction, boards are sold in "m 3" anyway and payment is made exactly for the volume, and if only a few pieces are needed, then the cost is determined running meters... And yet, it should be understood how such a calculation of the material is made.
With the correct organization of work at the first stage, there is always such an item as planning. Moreover, not only the design and features of the future structure, but also material costs. Therefore, if in accordance with the project 40 boards are required, then, taking into account the marriage or inaccuracy, you will have to buy - with a margin - 45 pieces. For this, you should calculate how many "cubes" you need to purchase and add a few more blanks to them.
Why?
Firstly, the number of boards in 1 m 3 depends on their parameters (thickness, length, width). Naturally, for each size, their number in the "cube" will be different.
Secondly, when carrying out any work, be it a new building or renovation, different boards are always used. For rafter system- some, for floors - others.
Thirdly, buying extra material is a waste of money. Of course, the boards will come in handy later, but they need to be stored somewhere. And not just throw it on the site, and then get "rot", but to provide the proper conditions. And considering that we have never had a deficit for timber, is it worth buying much more than needed?
Fourth, time factor. And if there are not enough boards when purchasing in cubic meters? What, stop work, look for freight transport, waste time on trips to points of sale?
And fifthly, do not hope that the Seller will answer such a question. In the best case, he will offer to recount the boards in stacks himself, if interested. At worst, on purpose or unknowingly, he will deceive.
We offer you a table with ready-made data:
There are only 3 columns in it. In the first, the dimensions of the blanks (in "mm") are indicated, in the second - their number in 1 m3, and in the third - the volume of 1 board (also in "m3"). There is nothing complicated. It is only necessary to find the corresponding line, and the answer to the question of interest is received.
By the way, it's very convenient. If we multiply all the required number of boards by the volume of one, then it becomes clear how many "cubes" will have to be purchased, which means how much money will have to be spent. A zealous owner should do just that. And tables are not needed, just use a calculator.
This table provides data for both edged and unedged boards. In addition, there are calculations for, which is also often used in construction or renovation.
In principle, this is quite enough.
Note
All of the above is true if an edged board is purchased. But it also costs more. It is more economically profitable to take raw material if it is possible to trim it yourself. But in this case, it is necessary to apply a coefficient when calculating. Experts believe that 20-30 percent of unedged sawn timber will go to waste. Consequently, from 1 "cube" of finished boards will turn out less.
