How many blocks of 50x50x3 m are in a cube? Edged board. Calculation of lumber for construction before purchasing it
Repair construction works often involve the use of lumber. But shops and timber trading centers often sell them not in pieces, but in cubes.
Everything is very simple and fast.
Method for calculating edged lumber
- a caliper, tape measure or folding m; if the length parameters of wood products are known, you can limit yourself to a regular ruler;
- calculator - suitable mobile phone, smartphone, if problems may arise with mental arithmetic;
- a piece of paper and a pencil - to record the results of calculations, how many boards are in a cube.
- Volume = Length × Height (product thickness) × Width.
To prevent confusion when converting cubic centimeters to Cubic Meters It is more convenient to immediately record the measurement results in meters.
For example, 0.132 cu. m = 6 m × 0.022 m (2.2 cm) × 0.10 m (10 cm).
Now, to determine the number of planks in a cube, you need 1 cubic meter. m divided by 0.132. When purchasing timber, the result obtained (7, 5757) must be rounded to 8 pieces.
This method of calculating cubic capacity is also suitable for timber. This way you can determine how many cubic meters of timber you need to purchase if you know the required number of products, or, conversely, determine required quantity cubes
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How to calculate the cube of an unedged board?
To determine the required volume of timber, the easiest way is to carry out calculations similar to the above method. Only the final result needs to be multiplied by 1.2 - a correction factor. From unedged boards you can get no more than 70-80% of edged ones.
The width and thickness of each product are measured taking into account its further processing. The technique will help determine the number of cubes wooden products, necessary for work, if the final result is planned for their further processing - pruning.
When purchasing, the widest and thinnest boards are measured to obtain an average width. If the width of the lumber at the butt is wider than at the top, the arithmetic mean of their dimensions is used without taking into account the bast layer or bark, rounded to 10 mm. In this case, fractions from 5 mm are rounded to the full 10 mm, and fractions up to 5 mm are not taken into account. The length and thickness of the lumber are measured in the usual way. The volume of timber is determined according to the usual scheme:
- the volume of one product is calculated;
- the total cubic capacity of purchased timber is determined; according to GOST, correction factors are used: 0.96 – for lumber from coniferous species, 0.95 – for lumber from hardwood wood.
In addition to the piecemeal method for determining the volume of unedged lumber, the geometric method can be used.
Requirements for a package of unedged timber:
- lumber is laid tightly, without overlaps, in horizontal rows;
- on one side the ends of the boards are aligned;
- all sides of the package are strictly vertical: according to GOST, the displacement of individual products outward and inward should not exceed 0.10 m;
- The package of lumber must be the same width along its entire length.
Then the volume of the package is calculated, the resulting result is multiplied by the coefficient:
Purchasing materials by eye is nonsense, and no self-respecting owner would do this. In order to competently draw up an estimate and estimate how much construction or major renovation, you need to determine how much of a particular product will be needed. It’s more complicated with boards - they are not sold individually, but are sold (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 area covered, that is, to m². Let's figure out how to determine how many boards will be in one cube.
Why are the boards 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 popular ones. Manufacturers focus on the dimensions of platforms and freight cars, so it is more profitable for them to supply boards 6 m long. But the buyer is more interested in boards four meters long, 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 transport is significantly limited. For example, it makes no sense to deliver boards to a dacha area, given the narrowness of the alleys.
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 volume measure) is the product linear parameters 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. This results in width and thickness. The length is known - 4 or 6 m.
- All measured parameters are recalculated into one dimension. Since we are talking about a cube, that is, m3, 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.
The numerator of the fraction does not necessarily have exactly 1. The storage of boards is done in different ways, and lumber is not always required in such quantities. If a stack contains 0.8 cubic meters, then this is its volume.
Example. Buy a board 6 m, 25 mm, 20 cm wide, in the amount of one cube.- We convert the values into meters: thickness – 0.025, width – 0.2.
- We 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 quantity and volume of lumber
If the resulting value is a fraction, the result is always rounded to the nearest whole value. That is, only the numbers before the decimal point are taken into account. This is the generally 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 in this group, regardless of their characteristics - wood species, degree of drying.
- The table values are purely indicative, since they do not entirely 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 the workpieces (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%.
Any construction work begins with a design and estimate, which involves calculating the amount of materials. Edged board– this is one of the most popular materials from the range of timber trading enterprises. The basic unit of measurement for any lumber is 1 m3. However, it is important for the end user to know the number of boards in a cube of a certain length and thickness.
Instructions
Sometimes the manufacturer leaves a tag on the materials indicating the price of the package and the exact volume. But often the measurement is made by the storekeeper.
The calculation of cubic capacity will depend on the degree of processing of the material, type and variety. For example, edged and unedged boards are calculated differently. Also, calculation methods may be different for breeds. For coniferous and deciduous trees, you can use both measuring and multiplying the sides, and a standard designed to calculate the volume. The second method is the use of a collection of tables, where each meter of length and one piece of material corresponds to a volume. They are called cubatures.
To find the number of cut boards in 1 cube, you need to find out the volume of one of them by finding the product of three quantities, and then divide 1 m 3 by it.
Example:
- Section 150x25 mm
- Length 6 m
The first step is to convert all values into meters: 150x25 mm = 0.15x0.025 m
0.15 x 0.025 x 6 = 0.0225 m3
We determine how many boards are in one cube: divide 1 m3 by cubic capacity (the volume of one board):
1 m 3 / 0.0225 = 44.4 pieces
Calculation may be required, for example, when determining the cost. So, if we take the price per cube equal to 6,500 rubles, then with a cubic capacity of 0.0225 m2, one will cost 146.25 rubles. But often the volume is rounded to 0.023. And then the materials cost the buyer 149.5 rubles per piece. And when rounding the quantity, the overpayment for 1 m 3 is 1%.
Calculation by unedged boards produced differently. If only one piece is purchased, then its length and thickness are measured in the same way as for trimmed material. But the average figure is taken for the width. For example, if it can vary from 15 to 23 cm at different ends, then it is necessary to take the value in the middle.
If you need to find the volume of a large number of boards, then they need to be sorted into piles according to the maximum match in length and width. It is better if the error does not exceed 10 cm. The height of the stack is measured using a tape measure in the middle of the board and the length. The result is multiplied by a special coefficient, which depends on the air gap and is 0.07-0.09 units and is taken from the cubature reference book.
The table shows the estimated number of edged boards of spruce, pine, cedar and larch in a cube of lumber. Standard length is taken as 6 m, and the width is from 100 to 250 in increments of 50 mm. The thickness is 25-50 mm.
|
Size, mm |
Quantity in 1 m 3 (L= 6 m) |
V 1 pieces, m 3 |
|
Size, mm |
quantity in 1 m 3 (L= 6 m) |
V 1 pieces, m 3 |
The generally accepted measure for measuring wood materials is the cubic meter. Most of All sawing products - edged, unedged, planed and other wood materials are measured in cubic meters. In other words, 1 m 3 is a volume equal to 1 m in length, width and thickness.
How many cubes are in one board 40x150x6000
The calculation of the cubic capacity of wood depends on two of its characteristics, and in particular on whether it has been processed or not.
To find out how many cubes are in one 40x150x6000 board (edged), you should use a calculation table or the following formula:
V=a × b × l, where
- a – height;
- b – width;
- l – length.
The volume is calculated in cubic meters, so all values should first be converted from meters to millimeters. Accordingly, the thickness of this material is 0.04 m, width 0.15 m, and length 0.6 m. The next step is to directly calculate the cubic capacity:
- V=0.04 × 0.15 × 6 = 0.036
Accordingly, in one edged 6-meter "magpie" - 0.036 m 3.
There are no exact tabular data for unedged ones. Average cubic capacity wooden element with a cross section of 40 x 6000 - 0.05 m 3.
How many boards in a cube
Edged lumber 40 × 150 × 6000 is widely used in construction and furniture production, for the manufacture of containers, in interior design and other purposes. To find out how many “forty” pieces are in a cube, you need to find out the cubic capacity of the 1st board. Further calculation is not particularly difficult; you just need to use a special calculator or the following formula:
K=1 m 3 /Vd, where Vd is m 3 of the plank.
In our case, the calculation will look like this:
K=1/0.036 = 27.777 pcs.
Accordingly, in 1 cubic meter of lumber with a cross-section of 40 × 150 × 6000 there will be approximately 28 pieces. It's better to round up.
How many meters in a cube
In 1 cubic meter of lumber there can be different quantities square meters. This indicator depends on the thickness of the product. Therefore, to find out how many meters there are in one cube of wood, you need to divide 1 m3 by the thickness.
T=1/a, where:
- a – width.
In our example, the thickness of the lumber is 40 mm, which is correspondingly 0.04 m. We substitute it into the formula and get:
T=1/ 0.04 = 25 m 2
As a result, 1 cubic meter of board 4 centimeters thick will be equal to 25 m2.
The cubic capacity of one edged board with a thickness of 40 mm
The cubic volume of edged lumber is 40 x 150 x 6000, as well as the number of boards and square meters per 1 cubic meter, can be seen in the table. It will help you correctly determine the required volume. building materials so as not to incur unnecessary costs when purchasing them.
All photos from the article
Find out how many boards there are in square meter Anyone planning construction or renovation should know how many cubic meters of material are needed to implement a particular project, how many squares can be covered with one cubic meter of material, etc. And although today it is not difficult to find tabular values for almost any situation, it is still advisable to understand how the calculations are carried out and, if necessary, be able to carry out the calculations yourself.
Dimensions of boards
How much is a cubic meter of board? One of the most common questions asked by newbie masters. In fact, this question can be given an extremely simple answer: it depends on what kind of lumber we are talking about!
As a rule, for construction and repair work Use blanks produced in accordance with GOST 8486-86. This standard, which regulates the basic requirements for softwood lumber (for hardwood there is a separate document - GOST 2695-83), determines what size the product can have.
Basically, pick up the required part It’s not difficult, but there are still certain restrictions that limit the production of blanks:
- thickness – from 16 to 75 mm;
- width – from 75 to 275 mm;
- length - from 1 to 6 m.
Naturally, there are also deviations. So, if necessary, you can order the production of parts with a different ratio of thickness and width. Their price, of course, will be higher than standard ones, but if necessary and the availability of suitable raw materials, you can cut almost any workpiece.
