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Calculating the volume of a bar: how much is a bar in a cube?

Calculating the volume of a bar: how much is a bar in a cube?

29.09.2021

Content:

The seller and buyer of timber pursue their own interests. In such a rather delicate matter, one must have certain - simple - knowledge. Today everyone has a tool: a calculator in the phone.

What is a cubic meter of edged board

How many edged boards in one cube - Photo

Edged board- lumber with cleanly cut edges, without bark residues. The width of the edged board exceeds the thickness at least twice.

Since the fee is charged for the volume in cubic meters, we recall the geometric formula for its definition:

W * H * D = volume.

Everything is in meters.

To find out how many boards are in one cube:

1 / (W * H * D) = number of boards in 1m3 (cube)

where, W- Width, AT- Height, D- Length

Translation: 1mm=0.001m, 10mm=0.01m, 100mm=0.1m

Below is a table of some types of edged boards and their volume

Board dimensions	The volume of one board	Boards in 1m3 (cube)
20×100×6000	0.012 m³	83 pcs.
20×120×6000	0.0144 m³	69 pcs.
20×150×6000	0.018 m³	55 pcs.
20×180×6000	0.0216 m³	46 pcs.
20×200×6000	0.024 m³	41 pcs.
20×250×6000	0.03 m³	33 pcs.
25×100×6000	0.015 m³	67 pcs.
25×120×6000	0.018 m³	55 pcs.
25×150×6000	0.0225 m³	44 pcs.
25×180×6000	0.027 m³	37 pcs.
25×200×6000	0.03 m³	33 pcs.
25×250×6000	0.0375 m³	26 pcs.
30×100×6000	0.018 m³	55 pcs.
30×120×6000	0.0216 m³	46 pcs.
30×150×6000	0.027 m³	37 pcs.
30×180×6000	0.0324 m³	30 pcs.
30×200×6000	0.036 m³	27 pcs.
30×250×6000	0.045 m³	22 pcs.
32×100×6000	0.0192 m³	52 pcs.
32×120×6000	0.023 m³	43 pcs.
32×150×6000	0.0288 m³	34 pcs.
32×180×6000	0.0346 m³	28 pcs.
32×200×6000	0.0384 m³	26 pcs.
32×250×6000	0.048 m³	20 pcs.
40×100×6000	0.024 m³	41 pcs.
40×120×6000	0.0288 m³	34 pcs.
40×150×6000	0.036 m³	27 pcs.
40×180×6000	0.0432 m³	23 pcs.
40×200×6000	0.048 m³	20 pcs.
40×250×6000	0.06 m³	16 pcs.
50×100×6000	0.03 m³	33 pcs.
50×120×6000	0.036 m³	27 pcs.
50×150×6000	0.045 m³	22 pcs.
50×180×6000	0.054 m³	18 pcs.
50×200×6000	0.06 m³	16 pcs.
50×250×6000	0.075 m³	13 pcs.

When buying lumber in small quantities, you can get confused with decimal places, namely with rounding. An experienced seller will round the resulting number to the 3rd decimal place. The experienced buyer will round up GOST y - up to 0.000001 cubic meters and remind the seller that up to 0.001 cubic meters. meters are rounded only a batch of boards. The most common quantity - from several boards to 2-4 cubic meters - does not make up a batch. In order not to offend either one or the other, they are rounded to 4 decimal places.

Then the resulting volume is multiplied by the cost of 1 m3 (cube). And here the number of decimal places can significantly affect costs.

1 edged board 32 mm thick, 200 mm wide and 6 m long(32X200X6000)has volume

0.032 * 0.2 * 6 = 0.0384 cubes

30 boards will have volume

0.0384 * 30 = 1.152 cubes

If the seller rounds the volume of 1 board to 0.04 cubic meters, he will additionally receive income:

0.04 * 30 \u003d 1.2 cubes
1.2 - 1.152 = 0.048 cubes

Selling these 0.048 "air" cubes makes the buyer's wallet easier

The cost may vary depending on the type of wood. Grading decreases with a decrease in quality: the presence of wood defects and deviations from standard sizes. If the floorboard has a curvature, narrower or thinner than the standard by 3-5 mm, it will not work completely. Visual inspection of the lumber is just as important as accurate sizing.

Edged board area covered

To find out how much lumber you need, the calculation of the board in a cube will help you. The above formula is based on the definition of area

W * D = area.

Having calculated the covered area, it remains to multiply it by the desired thickness of the board

W * D * 0.022; 0.025; 0.032; 0.04m and so on.

It remains to see how many boards are in one cube, and determine the required number. Just in case, print or memorize the table above.

You also need to take into account the future cutting of the material.The floor and sheathing boards "lining" have an overlapping tongue, which is taken into account in the cubature, but is not included in the area to be covered. A couple of boards are needed have in reserve

Determining the volume of unedged boards

How many unedged boards are in one cubic meter - Photo

Unedged board, that is, not having a rectangular section along the entire length, is much cheaper and is widely used for the installation of various kinds of rough battens, temporary fences.

It is important to understand that the top and bottom of such a board must be sawn along the entire length. If one face is not propylene, then this is already croaker. The definition of the cubic capacity of such lumber differs precisely in that it does not have the correct geometric shape.

The current standards establish several ways to account for unedged material, and it is almost impossible to calculate exactly how many boards in 1 cube.

Batch.
Piece by piece.
Sampling method.

In batch In this case, the boards are tightly packed into a bag of the correct shape with further measurement. Further calculation is carried out according to the standard formula for determining the volume. using various coefficients.

Piece measurement made according to average measurements of height and width. The largest and smallest dimensions in meters are added and divided in half.

(Wmax + Wmin) / 2 * (Hmax + Hmin) / 2 * L = volume, m3

where,W- Width,AT- Height,D- Length

If it is visually visible that the wood is fresh and, accordingly, damp (humidity above 20%), then the seller is obliged decrease the total volume by multiplying the resulting cubic capacity by the coefficient:

0,96 for softwood
0,95 for deciduous.

Sampling method used to determine the volume of a large batch of unedged lumber. When loading, for example, into the body of a vehicle, each fifth, tenth or twentieth board.

The resulting volume is multiplied by five, ten, twenty. Loading continues to the next control board. The selection of control boards in a separate foot is also practiced. The calculation is made after the loading is completed.