2024 Author: Beatrice Philips | [email protected]. Last modified: 2023-12-16 05:33
Natural wood lumber is a necessary element that is used for construction or renovation work. Wooden boards can be planed or edged, each type has its own characteristics … Lumber can be made from various types of trees - this determines its scope. Most often, pine or spruce is used for work, from which the edged board is made . And for the production of planed boards, cedar, larch, sandalwood and other valuable species of wood are used.
Among lumber, a board with dimensions of 40x150x6000 mm, which has a wide range of applications, is in special demand.
Peculiarities
To get a board of 40x150x6000 mm, at a woodworking enterprise, the timber is subjected to special processing from 4 sides, as a result of which the so-called edged boards are obtained . Today, such industries produce sawn timber in huge quantities, but only high-quality edged boards are sent to a further processing stage, as a result of which the edged board turns into planed, and low-grade edged sawn timber is used for rough construction work.
The weight of lumber directly depends on the size, moisture content and density of the wood. For example, a board of 40x150x6000 mm of natural moisture from pine has a weight of 18.8 kg, and lumber from oak with the same dimensions weighs already 26 kg.
To determine the weight of lumber, there is a single standard method: the density of the wood is multiplied by the volume of the board.
Industrial wood is subdivided according to quality criteria into 1 and 2 grade … Such sorting is regulated by the state standard - GOST 8486-86, which allows deviations in dimensions of no more than 2-3 mm in lumber with natural moisture. According to the standards, a dull wane is allowed for the wood material along the entire length, but it can be located only on one side of the board. According to GOST, the width of such a wane is allowed in sizes not exceeding 1/3 of the width of the board. In addition, the material may have edge-type or layer-type cracks, but no more than 1/3 of the width of the board. The presence of through cracks is also permissible, but their size should not exceed 300 mm.
According to GOST standards, lumber may have cracks formed during the drying process, especially this drawback is pronounced on beams with a large cross-sectional size … As for waviness or the presence of tears, they are allowed in the material in proportions determined by GOST, relative to the size of the lumber. Rotten areas of knots can be present on any piece of material within a length of 1 m, located on each side of the lumber, but not more than 1 such area and an area of not more than ¼ of the thickness or width of the board.
For lumber of 1 or 2 grades, with their natural moisture content, the presence of blue wood or the presence of moldy areas is permissible, but the penetration depth of mold should not exceed 15% of the entire area of the board . The appearance of mold and bluish stains on wood is due to the natural moisture content of the wood, but despite this, the lumber does not lose its quality properties, it can withstand all permissible loads and is completely suitable for use.
As for the loads, then a board with dimensions of 40x150x6000 mm, located in a vertical position and fixed along the planes from deflections, can withstand an average of 400 to 500 kg , these indicators depend on the grade of lumber and the type of wood used as a blank. For example, the load on oak lumber will be significantly higher than on coniferous planks.
By the method of fastening, wooden materials with dimensions of 40x150x6000 mm do not differ from other products - their installation involves the use of screws, nails, bolts and other hardware fasteners. In addition, this lumber can be joined using adhesives, which are used in the furniture industry.
Species overview
As blanks for the production of edged or planed boards measuring 40x150 mm, the length of which is 6000 mm, dry wood of inexpensive coniferous trees is most often used - it can be spruce, pine, but often expensive larch, cedar, sandalwood are also used. Sanded board can be used in furniture production, and non-planed edged or unedged products are used as construction timber. Edged and planed lumber has not only its advantages, but also disadvantages. Using knowledge about the differences between these types of products, you can choose the right one for a certain type of work.
Trim
The technology for manufacturing edged boards is as follows : when the workpiece arrives, the log is cut into products with specified dimensional parameters. The edges of such a board most often have an uneven texture, and the surface of the sides of the board is rough. At this stage of processing, the board has natural moisture, so the material goes through a drying process, which often leads to cracking or deformation.
Lumber that has undergone deformation during the natural drying process can be used in the following cases:
- for arranging a roof or a preliminary base-lathing during the installation of finishing materials;
- to create floors;
- as a packing material to protect goods during long distance transportation.
Edged boards have certain advantages:
- wood is an environmentally friendly and completely natural material;
- the cost of the board is low;
- the use of the material does not imply additional preparation and does not require any special equipment.
In the case when the edged board is made of expensive types of wood and has a high grade class, then its use is possible in furniture production in the manufacture of household or office furniture, doors, and finishing products.
Planed
When processing blanks in the form of a log, it is trimmed, and then the material is sent to the next stages : removal of the bark area, shaping products in the desired size, grinding all surfaces and drying. Such boards are called planed boards, since all their surfaces have a smooth and even structure.
An important stage in the production of planed boards is their drying, the duration of which can take a period of time from 1 to 3 weeks, which directly depends on the section of the workpiece and the type of wood . When the board is completely dry, it is re-subjected to the sanding process in order to finally remove any existing irregularities.
The advantages of a planed board are:
- exact adherence to the dimensional parameters and geometry of the product;
- high degree of smoothness of the working surfaces of the board;
- the finished board after the drying process is not subject to shrinkage, warping and cracking.
Planed lumber is very often used for fine flooring, for wall and ceiling decoration, as well as in the manufacture of furniture products in cases where wood with high quality levels is required.
When performing finishing work, planed boards can be subjected to an additional stage of processing, applying varnish compositions or mixtures to their even and smooth surface that protect the wood from moisture, mold or ultraviolet rays.
Areas of use
Lumber with dimensions of 150 by 40 mm and a length of 6000 mm is invariably in high demand among both builders and furniture makers, although it is most often used in finishing works and when arranging the roof. Often, the board is used to create walls in pits, protecting their surfaces from crumbling and destruction. In addition, lumber is used for flooring, arranging scaffolding, or can be used as a raw material for finishing lining.
Usually, boards with dimensions of 40x150x6000 mm tend to bend well , therefore, this lumber can be used for the manufacture of parquet or furniture products. Considering that the board is resistant to moisture and is flat and smooth when planed, the material can be used for assembling wooden stairs.
How many pieces are in 1 cube?
Often, before using 6-meter sawn timber 150x40 mm, it is required to calculate the amount of material that contains a volume equal to 1 cubic meter. The calculation in this case is simple and is performed as follows.
- Board dimensions required convert to centimeters , while we get the size of the lumber in the form of 0, 04x0, 15x6 cm.
- If we multiply all 3 parameters of the board size, that is 0, 04 multiply by 0, 15 and multiply by 6, we get a volume of 0, 036 m³ .
- To find out how many boards are contained in 1 m³, you need to divide 1 by 0, 036, as a result we get the number 27, 8 , which means the amount of lumber in pieces.
In order not to waste time on performing this kind of calculations, there is a special table, called a cubic meter, which contains all the necessary data: the area covered by sawn timber, as well as the number of boards in 1 m³ … Thus, for lumber with dimensions of 40x150x6000 mm, the coverage area will be 24.3 square meters.
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