Lumber and larch, especially timber from this tree

Larch belongs to the coniferous tree species from the pine family. There are about 20 of its species. Here it grows from the Pacific Ocean to the Ural Mountains.

Breed distinctive features

Most often for the production of building materials used Siberian larch.

General information

Due to the harsh winters, this tree has the most durable wood, which is 35% denser than pine. Larch has 12 tones in the range of its colors. It can grow up to 50 m and have a trunk girth of 2 m (see also the article Glulam from larch: practicality and environmental friendliness of your homes).

Timber made of Siberian larch is used for the construction of all wooden buildings: houses, cottages, bathhouses, gazebos, fences. Wood is also used for cladding walls, floors and ceilings, as well as the production of furniture and interior items.

Note! An important advantage of larch - the lack of drying of the forced type, so the lumber from it have natural moisture. In addition, its wood is hardwood and has the same strength as oak.

The main wood products produced are bars, beams and boards made of larch, as well as wall paneling, plank, furniture panels, parquet.

Material advantages

Building materials from larch are so in demand because it has the following advantages.

1. A level of strength comparable to metal. A building constructed from this tree is not afraid of cold weather and strong winds.
2. Due to the natural protection of its own resins, larch is not at all afraid of moisture, so it does not rot, warps or changes geometry due to the effect of high humidity. Even more, being constantly in the water, its wood is petrified.
3. The density of larch materials is such that it is very difficult to drive nails into them.

1. High durability. Buildings, cladding, furniture and larch interior retain their unchanged appearance for centuries.
2. Its wood has a beautiful texture and color. It has a large range of tones from golden brown to bright yellow, the surface of the materials has a silky sheen.
3. A comfortable microclimate is maintained in a residential building for the construction of which a glued or shaped larch timber was used. In severe winters it is warm and cool in summer.
4. Environmental friendliness. The remote Siberian regions of Siberia do not experience a negative anthropogenic effect; therefore, its forests preserve pristine natural purity.
5. Resinous substances of larch, in addition to flavor, emit phytoncides, which prevent the growth of fungi and bacteria.
6. The heat resistance of the tree is more than twice that of other pine. Therefore, the larch is not necessary to handle flame retardants.

The only drawback of larch timber is the high price.

Larch Sawnwood

The most popular lumber - larch bar, timber, boards, lining.

Solid Larch Bars

A bar is a sawn timber that has a cross section (thickness and width) less than 100 mm.

Due to the unique moisture resistance and smooth aesthetic texture, this material from larch can be used for both internal and external construction works.

Бруски используются для монтажа каркасов, обрешеток, установки лаг для полов, сборки лестниц, возведении щитовых зданий, изготовлении мебели. Наиболее популярные изделия, при этом - это брусок из лиственница 50х50, а также 40×50 мм. Длина материала равна 3/6 метров.

There are 5 classes of this product.

1. Extra. These timber products have no defects, including textures and colors.
2. Prima The bars have slight color variations.
3. Category "A". There is a small number of "healthy" knots.
4. Class "B". Inserts of resin pockets and knots that do not grow together, with a diameter of up to 8 millimeters.
5. Grade "C". A large number of drop-down ("dead)" knots and resin pockets having a size greater than 8 mm.

Note! This classification makes it clear that the grade of sawn timber is determined, to a greater extent, by their appearance and, to a lesser extent, by quality. Naturally, the higher the class of wood, the more expensive it is. Moreover, each of the categories of hardwood bars can be used for external and internal works.

Bars with small dimensions and used for fixing glasses are called layouts.

Rectangular or square section of the bars is attached by sawing timber from all its sides or only from two. The longitudinal plane of the obtained products is called the edge, and the wide one is called the sheet. The line of their intersection is called the edge. The end side of the bar is the end.

The versatility and ease of use of larch bars are the same as for boards. They are easy to manufacture, and such features as lightness, durability, moisture resistance, ease of installation make it in many cases indispensable.

You can use in the construction of their own hands bars, having a natural moisture content (up to 18%) and subjected to drying (up to 12%). Products that have not been dried are used when there is no danger of any deformation. As a rule, these are frameworks and crates of structures.

For internal workings, dried bars are used. In addition, dry products are necessary for the manufacture of doors, windows, furniture and interior items. Such products are additionally impregnated with special substances and are often processed with wax, furniture oil or varnish.

Note! Care should be taken when storing materials. Stacks with bars must be stored so that air circulation and adequate internal ventilation of the bars are ensured.

Products for window frames and boxes

Another popular material is solid and glued larch window timber.

1. In the latter case, the material is glued together from three lamellas (blanks) in thickness.
2. In this case, dies are taken radial or close to it cut. When it is cut through the core of the trunk, the angle of the annual rings to the surface of the workpiece is 60/90 degrees.
3. Since the output of the lamellas of such a cut is less than 15 percent, the cost of glued bars is high.
4. The instruction allows the use of medium slats with a slope angle of annual rings greater than 45 degrees.
5. A smaller level of lamella thickness, relative to the wood mass, makes it possible to remove internal and external stresses in the material and reduce its humidity.
6. To achieve the desired degree of humidity (10/12 percent), convection chambers are used and soft types of shrinkage are used. They make it possible to minimize the cracking and warping of wood.
7. When drying ends, the slats are calibrated. They are checked for visual flaws and carefully sorted.
8. Further, on trimming machines, the following defects are reduced: material cracks, knots, resin capsules, etc.
9. Then the strips along the length are spliced ​​onto micro-spikes and oskudyvayutsya from all sides to obtain the required size.
10. Next, the blanks are glued on special presses. The resulting bars are calibrated finally. Usually, PVAC adhesive is used for work. It does not interfere with the air exchange between the wood and the environment; therefore, structures made of such bars “breathe”.
11. The result of the production are glued three-layer bars, having a cross section of 78? 78 mm (under eurowindows) or sizes of 60? 70 mm (under OSB type windows).

Unlike solid wood, glued bars are much more resistant to various deformations, more durable, and, like plywood, have the same strength in all directions. In addition, they are devoid of wood flaws.

According to the norms introduced by the German Institute of Window Technologies, the material is divided into the following categories.

• 1 (DKD). The inner strap of the product is spliced ​​by means of glue gears. The minimum length of the short is 12 cm. External dies are solid. It is permissible to produce bars, glued together from all three solid blanks.
• 2 (DKK). The lamella in the middle and one of the outer dies are spliced ​​with a glue gearing. The shortage of the inner blank, minimum, should be 12 cm long, and the outer spliced ​​lamella should be 200 cm. One of the outer slats is solid. It is possible to produce window bars of two whole slats and one of the outer, which is spliced.
• 3 (KKK). All three blanks window bar spliced ​​on the adhesive gear. The inside lamella has a length of 12 cm, and the outer - 20 cm.

The length of products for the first two categories is: minimum - 90 cm, maximum - 4 m. For the last variety, the maximum length is 6.1 m.

Profiled and glued laminated timber

Larch timber is a timber that has a width and thickness of 100 mm or more.

Standard material sizes:

• larch timber 100x100;
• analogue, section 100x150;
• products, size 150x150;
• products having 100x200 sides;
• bruch 150х200;
• analogues with sizes 200x200.

In addition, many companies produce glued and profiled timber that has non-standard parameters (see also the article What are the advantages of glued cedar timber).

Products with a cross section of 100x100 mm and 100x150 are used in most cases for the manufacture of roof truss systems, the construction of frame houses, gazebos, verandahs, etc., as well as floors.

Larch timber 150 to 150 is used, as a rule, for the construction of walls of one-story wooden buildings. The material has excellent sound insulation, durability, moisture resistance and durability. It does not need to be impregnated with flame retardants and antiseptics.

If you need to build a large two-story building, you must choose a timber of 200x200 larch.

Bar Imitation Products

Imitation of a bar from a larch is a doubling board which is option of eurolining. This material differs from the traditional counterpart in that it does not have a shelf — recesses from the front. In addition, imitation strips are wider and thicker.

Ceilings and walls that are lined with similar slats, visually can not be distinguished from counterparts, assembled from a bar. Therefore, the material is the name.

Imitation larch lumber is usually used for interior and exterior wall cladding, which are constructed from a variety of building materials.

Wider strips are used in the exterior cladding. Installation, thus, speeds up, and the building takes on a respectable appearance. For internal work, narrow strips having a width of 13.5 / 14.5 cm are used. Such a covering visually enlarges the rooms.

Conclusion

The timber, which is produced from larch, has numerous advantages. And although its cost is quite high, it will pay off over time (see also the article Cutting timber and its role in civil engineering). Your attention posted a video in this article, where you will find comprehensive information on the remaining issues.