How to fix lags for concrete base. Installation of logs on a concrete base. Installation of logging on a self-tapping screw, anchor or dowel

Wood may seem not the best solution for the design of the draft floor in terms of strength and reliability, but in some cases it is quite justified by other operational qualities. For example, if you need to fix the shortcomings of a concrete basis, form a niche for laying an insulator or create channel channels. At the same time, the technology of fastening the lag to the concrete floor is not as simple as in the case of conventional wooden boards. Black flooring is a responsible structural element, the durability of the decorative coating directly depends on the quality of the device.

Lags in the floor system

The framework of the floor consists of several levels starting from the foundation with the frame and ending with the basis for which the finishing coating in the form of tiles, laminate, parquet, linoleum, etc. The material for the base is usually the concrete screed. It is less likely to apply in wooden houses, but, for example, urban apartments and private brick cottages without such a platform are not cost. The screed can serve as the final layer of the frame and carrier in relation to the top of the base. A kind of superstructure over this design and form lags. The concrete floor is placed in a solid way, but with the deposits of the type of crate. At the same time, the attachments can be different, but the basic quality of the design will be determined by the characteristics of the tree itself. Lags must be well succumbed, get rid of small flaws and, if necessary, treated with special impregnations. It can be fire-resistant tools to prevent fires, and the usual olife, which prolongs the operational period of the material.

What instrument and materials will be required in work?

The large-format lags will be difficult to handle at home, so it is better to calculate in advance and order elements with the desired parameters. If it was not possible to do this, then the pre-treatment of lag will require the use of an electric bike, circular hand saw and grinders. Already in the process of fastening the lag to the concrete floor, you will need an electrical screwdriver or an electric door with bits type nozzles. It is advisable to prepare the tool more powerful - at least driven by 1500 W. As locks, metal fasteners are needed - anchor elements, bolts, corners, screws, etc. The choice of one or another group of hardware depends on the installation technology.

As for the auxiliary consumables, there will be a bit. At a minimum, the linings for lags will be required. In this capacity, you can apply plywood sheets or bars of the appropriate format. Also do not forget about the capabilities of the device of insulating coatings. The classic floor design on the lags quite allows you to stack and thin pairprooolators, and a thick insulation in the form of plates of mineral wool.

Varieties of lag for the floor

The most common format of floor lag is a beam with a rectangular or square cross section, which is suitable for specific conditions for use of the length parameters and thickness. Especially for the worm flooring, rectangular lags are recommended as the optimal version of the design. The beam with such a cross section takes less space in the underground niche, but it provides sufficient coverage of segments in the width of styling. Accordingly, the fastening of the lag to the concrete floor is simplified, since less long and durable methols are required to fix the element.

There is also a separation by the manufacture of beams. Planed lags are subjected to special processing in order to reduce hygroscopicity. This material is more resistant to moisture, therefore, can be applied in the construction of baths and saunas. Alternative to planed beams are sawn bars. This is a draft material with less attractive technical and operational qualities, but it is cheaper and may well justify itself as the first level of the sexual frame, connecting the framework of the foundation with the final layer of Lag.

Calculation of material in size

The ability to cope with loads depends on the correct calculation of the design parameters. These indicators, in turn, are determined by the size of the room, the planning and configuration of the premises in general. For the basic calculation, it is possible to use the amount of the space of the room, correlating it with the dimensions of the beam. For example, a 2-meter span should be prepared with a bar with a cross section of at least 110 x 60 mm. For 4 m, the beam of the format of 180 x 100 mm will be required, and for 6 m - the size of 220 x 180 mm. In turn, the section will determine the distance between the elements. How to fix lags for concrete floor to keep the balance between the strength of the structure and acceptable load on the carrier base under beams? After all, a close to the continuous placement of a bar may determine excessive pressure on the same scarlet. With the thickness of the board of the order of 20 mm, experts are recommended to withstand indents up to 300 mm. At 300 mm, the same parameter is already 500 mm, and the 50mm elements are located at a distance of 1000 mm each other.

Preparation for work

In preparation, the most attention is paid to the state of the concrete surface. As already noted, the load from the beams can be critical, so the carrier base should be given in proper condition. In order for the fastening of the lag to the concrete floor was reliable and durable, the screed is strengthened with construction solutions, smeasters and primers. With significant damages, it is necessary to update the cover with a sandy-cement fill with an acceptable thickness - 4-5 cm. If we are talking about local small defects, then you can restrict ourselves to the point application of the primer and sprouts designed specifically for concrete. As a cosmetic leveling solution, it is worth applying a thin filling with tiled glue or self-leveling polymer composition.

Basic ways to attach lag to the concrete floor

The most common installation methods implies the fixation of the beams by means of screws and anchor compounds. A rigid fit with the clip is ensured, in which the design remains fixed even with dynamic loads. How is the fastening of the lag to the concrete floor by anchors? For this, the holes in the intended versions of the bar are drilled, after which hardware integrated according to the standard scheme. The optimal diameter of the anchor bolt is 10 mm, and the length is up to 200 mm. One segment will be enough 3-4 fasteners.

Fastening equipment with a corner

Another common way to fix the lag is with the help of the corners. Its advantages include a higher degree of reliability, as the lag is ensured with each other. At the basic level, parallel to the lags are screwed to a concrete basis. But as a supplement perpendicularly installed a small format timber. In places of joints with beams and mounted as a result, a double fixation system is implemented. It is possible to fasten the lag to the concrete floor with the corners without the use of intermediate bars. In this case, instead of anchor direct connections, a side locking technique is used through the corner to the screed. Immediately the mount is carried out by screws of a suitable size.

Features of fastening without drilling

Refusal of intervention in the beam structure gives a lot of advantages, increasing the durability of the whole design. But how to achieve reliability of the situation of Lag without applying hardware? Fasteners will be used, but for the auxiliary elements. These are the same consumables in the form of small bars and plywood sheets, which should just be fixed to concrete as the supporting contours of the substrate. On their platform will be fixed lag without drilling. The reference planks are originally mounted, after which the beams are stacked. Rigid power fixation will be provided with the help of groove connections. They can be provided for both in the lining "lining-lags" and through across the walking auxiliary bars, which will be sent along the entire length of the room. This design is characterized by complexity and requires a thorough preliminary calculation.

Insulating events

The waterproofing layer can be laid before the installation of the lag, which will facilitate subsequent insulation activities. But experts still recommend to start similar work after the installation of the beams is completed, since operations with fasteners can damage the laid material. As for the insulation, it is laid in the niche formed between Brous. If optimized lag laying was performed on the concrete floor, only by parallel lines, then gaps will remain between mineral wool plates. They are additionally treated with silicone or other sealants, which in principle are combined with the Minvata. Slices of insulation are cut in accordance with the parameters of empty niches, after which they are stacked on the waterproofer. As a rule, the power fixation of Minvati is not performed - sufficiently after laying to cover the material by another layer of hydro or vaporizolation. In the future, a new layer of wooden coating from boards will be performed for the finishing flooring.

Installation of adjustable lag

The most functional design that allows you to adjust the height of the floor position for specific needs. For example, it will be possible to adjust the level of the base specifically under the thickness of the insulating material. But how to fix the lags for the concrete floor so that they are regulated? The fixation system is quite simple and requires the use of only two elements - a rectangular mounting stand with fastening hardware and hairpins. The carrying function will perform the system of supports, securely fixed at the points of fixing the beams using a dowel. In the central part of each stand, the stud is installed, to which the timber is screwed. This is done with a screw with a nut, which will allow in the future to adjust the height of the floor. That is, initially it will be necessary to perform holes in lags with a thickness corresponding to the diameter of the studs.

Conclusion

The carrier base for gender on lags is widely used in private house-building due to the reasonable price and ease of installation. After installation, the user will also get a lot of opportunities to use free space between beams - ventilation channels can be located here, the same heat insulator, communication routes, etc. And on the contrary, among the disadvantages of the structure, the calcility and short-life are usually noted. How to fix lags for concrete floor with a high degree of reliability of the formable frame? First, it should be guaranteed the strength of the connection of the concrete basis and the beam crate - both directly and through the auxiliary elements. Secondly, the installation configuration itself is initially calculated on specific operating conditions of the house. The project should take into account the indicators of static and dynamic loads, which will make it possible to choose more and fastening fittings.

Tsugunov Anton Valerevich

Reading time: 4 minutes

Preparation of materials and tools

Before starting work, you need to stock all necessary. Given that it will work with wood and concrete, the list of necessary tools will be as follows:

pencil;
building level;
roulette;
perforator drill;
devices for working with wood (planer, hacksaw or circular saw);
screwdriver or screwdriver set;
fastening elements (usually they are self-tapping screws, dowels and anchor bolts).

Prepare tools, you can go to the nearest building market for the material. Typically, sawn timber sellers, pursuing personal benefits, advise to acquire expensive wood varieties, referring to the reliability and long service life of the material. No need to succumb to this trick. For your purposes, spruce, fir and pine may be coming. The varieties of the tree category B or Bc are completely suitable, the material moisture should not exceed 18-20%. At the same time, the appearance, the color and even evenness of the parts of the big role do not play. The only thing to pay attention to is the lack of mold and traces of the work of Zhuka-Koroed.

The Lag section depends on the thickness of the floor covering and insulation. Specialists do not recommend using less than 20 millimeters as a lag timing.

Installation process

Immediately it is necessary to clarify that the use of lag under the floors is appropriate only in apartments with high ceilings. This floor installation technology is quite "stealing" the height of the premises. So, the installation of the lag occurs according to the following scheme:

Or concrete base is recommended to align. Otherwise, the elements will not be in one horizontal plane. Accordingly, they will need to align them by plates. This may lead to the fact that the floors in the apartment will creak.
On the basis you need to lay a layer, or process concrete with special mastic. In the first case, the use of soft materials should be avoided. Over time, they will cover, and the floor will cease to be reliable and monolithic. For the waterproofing layer, the runneroid or polyethylene film is perfect.
Lags are processed by antiseptic composition and cut in accordance with the size of the room.
The installation process begins with the installation of the lag in two opposite walls. These elements are aligned using the construction level and are immediately fixed to the concrete floor. Then the rags are stretched between the installed lags. It will serve as a landmark for the installation of other elements.

The remaining lags are stacked. The distance between the elements directly depends on the thickness of the future.
There is a thermal insulation between lags. Equata or rolled materials can be used for this. In the second case, it is necessary to mount the material as dense as possible without leaving the gaps between the layers.
Very layer of vaporizolation. This is a necessary condition for protecting the insulation from external influences. Parosolation can be attached using a stapler, the joints must be glued with scotch.
You can lay a layer of plywood. This will serve as the basis for mounting the floor covering.

In order for the floors for a long time, you need to strictly observe the step between the laid items. To do this, you can use the table.

Anchors

This method is used not only for fastening the elements, but also to impart additional strength. Press the anchor from a concrete base is quite problematic, so when dismantling such a design may occur. Anchors are installed, like self-tapping screws, by drilling through holes. A shut-off element is inserted into the concrete, in which the bolt itself is twisted through the lag. So that the head of the bolt "drowned" in the wood, the holes must be pre-translated.

Metal corner

Another way to install wooden elements on a concrete basis. To do this, you need a galvanized metal corner. The installation process looks like this: the corner is attached to the lag with the help of self-pressing (fastening should enter the tree at least 3 cm). Then the self-tapping screw over the dowel is attached to concrete coating.

Today there is a huge number of technological features of the concrete floor arrangement in an apartment or a private house. You can use a variety of insulation, insulation, laying materials, apply the technology of "warm sex", align the concrete surface by self-leveling solutions.

If a moisture insulation membrane is disseminated on the floor, then the lags are stacked on it without a gap.

However, it does not lose its relevance and such an option as a gasket on the concrete floor. This option was especially in demand in the construction of private houses, where it allows the height of the ceiling. In addition, the laying on the concrete floor allows you to simply use inexpensive types of insulation materials.

For lag, the dried forest from the trees of coniferous varieties is most often used.

When attaching to the concrete of a particular building material, different fasteners and tools can be used. Fastening is quite simple. Today, even the option is becoming popular, involving the lack of fastening the lag to the floor.

With this option, the sexual design is tightened due to bonding with lag bars of genital boards or other oven. However, in this case, there is a big risk of shift, the congress of the flooring. Therefore, it is better to use the classic option when the lags are attached to the concrete floor on a self-tapping screw or anchor attachment.

Choice

It is also important to choose to choose the lags themselves. In this sense, attention should be paid to the following criteria:

appropriate type of wood;
section sizes;
cost.

It is more expedient to use not very expensive wood of coniferous rocks (pine, spruce, fir). At the same time, it is quite suitable for wood 2 - 3 varieties dried to a moisture indicator of 20%.

The size of the section of the bars is chosen depending on which the insulating layer will be between them. In addition, it is necessary to take into account the height of the ceiling.

If it is not very high, then it is impossible to raise the floor strongly to not squeeze the inner space room at all.

Tools for work

The specifics of the work associated with the fastening to the concrete floor is that the tools are needed for both wood processing and to drill a concrete base. To perform standard manipulations, you will need:

Installing lags, make sure that they lay down in terms of the level.

perforator;
self-tapping screw with a diameter of 6 mm and a length depending on the size of BRUSIV, with polypropylene dowels, which should be in concrete by 6 - 8 cm;
anchor metal fasteners (selected depending on the size of bars);
joiner's tools: hacksaw, planer, circular, etc.

Choose between self-drawing with dowels and anchor metal fasteners should be given to the planned financial costs. The first option is much more economical, the second is more reliable. Most often enough dowel fastening, especially since inexpensive screws can be screwed up with a smaller step. The advantage of the anchor fasteners is that they will not simply fix the position of the bars, but also press them to the concrete base, which is very important in cases where the finishing flooring will be sufficiently massive and often exposed to strong mechanical external influences.

We also need a waterproofing material that necessarily rushes to the concrete floor before installation. Here you can use a dense construction polyethylene or rubberoid. You will also need mixtures for rubbing and anti-grapple wood processing. These mixtures need to pre-process wooden bars. If the concrete base is not quite even, then you need to stock and material to create linings. Boards, chipboard, plywood can be useful here.

The process and features of fasteners

Prepare all the necessary materials and tools, you can proceed directly to fastening to the concrete floor. It is not difficult to fix them and quickly quickly. All work can be carried out independently, without the help of the subband. The standard version of this attachment passes at the following steps:

The floor on the lags is the perfect option if there are high ceilings in the house.

First, it is necessary to add a concrete base of the floor by rubberoid or other selected vapor barrier material. The joints of rubberoid or polyethylene sheets glued with construction tape.
Next, we distribute over the floor surface. Two of them will be laid along opposite walls. The rest are located between them with a certain step, which is calculated taking into account the density and rigidity of the material that will be laid on top. The tougher such material, the step between the lag bars can be more. On average, such a step ranges from 40 to 80 cm.
If the length of the room is more than the length of the bars, the latter can be laid in the joint. When using high lags or with large alleged loads on the floor, it is necessary to make end-shutters to connect the lag with each other.
First, two parallel along the walls are stacked. With the help of the level and wooden plank, their height is aligned. Between them, the cord is tensioned, and all the other bars will be laid.
Lags are attached to concrete very simple: a hole in the bar is drilled and the corresponding hole in the concrete base. A polypropylene dowel or spacer detail of the metal anchor is laid at the latter. Then screw the screws or bolts. Anchor mounts for one bar require two or three. Self-tapping screws can be screwed in increasing from 50 to 80 cm.
If necessary, leveling gaskets are stacked under lag bars, which are made from the board, chipboard, plywood or other rigid material. The lining should be firmly held after the installation of the bar so that the floor subsequently did not fade and did not creak. Of course, it is better to do without pads. In some places, you may need to ascend a small plot on the lag if there is a small bulge on a concrete basis.

After the lags are installed, one or another insulation material can be laid between them. Then before the flooring of the flooring, it is desirable to pull the vapor insulation layer along the lags. Such a system of insulation is quite effective, and the floor is solid and warm. Thus, the concrete base of the floor can be very successfully equipped with the help of the simplicity of the procedure for fastening wooden lags to the concrete floor.

Lags are the bars of rectangular shapes made of wood, apply to the installation of a wooden crate on a cement base. From how qualitatively the fastening of the lag to the concrete floor, the strength and durability of the pure surface will depend on.

Wooden lags.

Materials and tools

The material for laying the base of the floor is the wood of coniferous and hardwood. The most popular varieties are spruce and pine.

For the manufacture of lag use wood 2 grades, having a thickness of 50-60 mm and residual humidity 12-18%. The degree of lumber moisture is checked with a special device - moisture meter. The construction bar must not contain drop-down bitch, chips, holes and damaged surface mold.

The sheets of fiberboard or cork pads are used as the underlying material.

You may also need:

fastening details;
antiseptic;
waterproofing material (polyethylene, hydrobarrier, etc.);
floor primer;
sound and thermal insulation products.

Fasteners

For fastening the bars to the base apply:

dowel nail;
anchors;
self-tapping screw;
metal corners;
brackets;
bolts-racks.

The dowel-nail consists of two elements: a caprony tube and a metal rod with screw thread. A plastic dowel presses the part, and the bolt when it is hit by a hammer fixes the connection.

Metal anchor - This is a device intended for fastening wooden lags to. It consists of a spacer mechanism with an internal carvings and a bolt, when rotating which the device petals rests on the walls of the opening and ensure the mounting of the bar to the concrete base.

Self-tapping screw - metal screw with acute outdoor thread. It applies only to a pair with kapron or wooden plugs. When twisting it into the plastic plug, it slices the passage channel itself. This ensures the fastening of the part on the surface.

Tools for fastening lag.

Metal corners and brackets Made from steel or aluminum perforated profile. One side is attached to the floor, the second - to wooden lags.

Bolts racks are studs with threaded couplings whose rotation can be changed.

The choice of fasteners depends on the following factors:

Uneven floor in the apartment. Such conditions for the performance of work provide for the use of adjustable fastening. The use of bolts-racks ensures that all laid lags will be in one horizontal plane.
Mechanical load level.
Designed floor height.
The humidity of the concrete base (the presence of natural ventilation).

When choosing wood for the floor, it is necessary to take into account the following characteristics of the material:

wood breed;
humidity level;
compliance of the quality of products in specified operating conditions;
thickness and height of the profile.

For a bar, you need to use non-stroke boards of the second or third grade from wood hardware and coniferous rocks, except for poplar and linden.

Defects of sawn timber, eliminating their use in the base of the wooden floor base:

Pores with a diameter of 1-2 mm - indicate a damage to the core.
Bounds, chips, cracks or bark residues are a low-grade product.
The surface is covered with stains of different colors - a sign of the damage to the fungus, mold.
Curvating - a sign of violation of wood drying technology.

Lags for concrete base.

The choice of lag width depends on the area of \u200b\u200bthe room, the type of finish coating and the intended load on the base. The greater the size of the room, the wider you need a profile.

The thickness of the lag, based on the entire plane on the ceiling plates, should be 40 mm, width - 75-100 mm. Brous width stacked on individual supports - 100-120 mm, thickness 40-50 mm.

The height of the lag is selected on the basis of the size of the room and the presence in the draft recommendations on the device of natural floor ventilation. The ill-made selection of the profile size can reduce the height of the rooms by 50-250 mm, taking into account the thickness of the piston coating.

It is possible to increase the carrying ability of the elements by increasing the number of support racks, which is much cheaper than buying a larger profile. When calculating the number of sawn timber, it is also necessary to take into account that the installation on the concrete base of lag should be performed at a distance of 20-30 cm from the enclosing structures.

The humidity of the acquired timber and gaskets should not be more than 18%. All lags and substrates must be treated with an antiseptic.

For the wooden floor, the lags require a set of profile equipment and tools:

Roulette construction.
Chalk or marker.
Corolnic
Manual or electric saw.
Plane.
Chisel.
A hammer.
Kiyanka.
Electrock for drilling holes for adjustable mounts.
Perforator for mounting anchors and dowels.
Water and Rack Level.
Screwdriver with nozzles of the desired size.
Scissors, including metal.
Knife with a solid blade.
Machi brush or rollers for floor primer.

Set of tools.

Methods of installation Lag on concrete floor

Mounting works are in laying wooden bars for prefabricated or monolithic reinforced concrete bases.

An important condition for the qualitative performance of work is the right choice of fasteners and compliance with the technological scheme for the arrangement of the lag on the surface of the base:

Bar should be installed across the light line from the windows parallel to the window or door to the door. Between the walls and profile, it is necessary to leave a gap with a width of 25-30 mm.
If sound insulation is needed, the substrate under the lags is placed by a solid strip along the entire length, without breaks.
The mounting holes and seams between the prefabricated elements should be filled with cement-sandy brand not lower than M150.
Lags should touch the surface of the slab overlap without gaps. The voids between the timber and the base is recommended to score with small sand or fill in with mounting foam.
The minimum length of the spliced \u200b\u200bbars should be ≥ 2 m. Short profiles should be connected to each other in each other anywhere in the room with displacement of the seams in parallel lags by 0.5 m.
In the doorways of adjacent premises, it is necessary to put a ruined bar, protruding for a 50 mm partition on both sides. This is done so that the finish coating in different rooms is based on the same basis.
The horizontal level of profile laying is checked by a two-meter rush tool.
Before the device of the cleaning floor, the space is purified from chips, chips and garbage.

Mounting on a self-tapping screw

When mounting on a screw, it is recommended to use hardware with a nickel-plated surface with plastic plugs having a protruding edge for a screw screw. The diameter of the screw is 3.5 mm, the length is selected taking into account the height of the lags - 50-150 mm.

In the lags drill through holes with a size of 0.5-1.5 mm less than the diameter of the screw. In the slab overlap using a perforator, a hole holes are dried. Then in the concrete floor insertion dowel and put the profile. Check the alignment of holes and screw the self-tapping screw. The horizontal level of lags is regulated by fastener and substrates, relaxing or tightening the connection.

Fastening anchors

Anchors provide a stronger mount than a dowel-nail or screws. The principle of installing fixtures is the same as the self-tapping screws, but instead of a kapron dowel, a spacer metal sleeve is inserted into the base. The optimal diameter of the fastener is 6-10 mm, the length is 50-150 mm. Due to the high density of the compound per 1 m timber, one anchor is enough.

Mounting lag on a metal corner

Mounting corners.

The profile is fixed by any side to the base of the floor with a dowel or anchor. Lagu is stacked in the cavity of the corner and screw the screw. The distance between the mounts depends on the length of the room and should be 35-50 mm.

The same procedure can be done using metal perforated brackets. In this case, the bar will be covered on both sides by the shelves of the device.

Adjustable fasteners for the base of the floor can be 4 species:

plastic supports (columns);
studs with nut and washer;
polymer bolt-rack;
threaded sleeves.

The most convenient designs of factory manufacturer with cross-cutting clutches, which may be the following dimensions:

0.45 x 0.45 x 2.0 m;
0.45 x 0.70 x 2.0 m;
0.45 x 120 x 2.0 m.

They are supplied with threaded racks to adjust the profile lifting level and dowels for fastening the rack bolts on the base.

Fastening adjustable lag.

Assembly order:

Before installing the design, plastic rack bolts are screwed into the openings in the profile, which will be laid down.
The bars must be placed in parallel to each other in a step of 350-375 mm.
Then in the concrete base drill holes for the installation of vertical connections. In this place through the rack, a dowel-nail is styled.
Using a special key, rotating left and right fastening rack, adjust the horizontal level of the lag.
The dowel-nail is clogged until you stop, check the reliability of the connection and move to the next profile.

Mounting Lag to the concrete poles

Under the lags installed on, lay 1-2 layers of waterproofing material (rubberoid, etc.), the edges of which should go beyond the boundaries of the base by 30-40 mm. On top of the insulation are placed in a single layer of the substrate from the fiberboard. Fastening profiles are performed using dowels or self-tapping screws.

Brous dock must be made only in the center of the monolithic support. The leveling of lags is made by changing lining thickness.

Step-by-step instructions for fastening the lag to the concrete base with their own hands

The easiest solution for the device of a wooden coating on lags is a profile mount with a dowel.

The following materials will be required to produce work:

Bar 50 x 70 mm.
Dowel-nail 8 x 120 mm.
Fiberboard sheet.
Polyethylene film.
Mats insulation.

Mounting work:

Clean the room from unnecessary objects and garbage.
From wood-fiber plate cutting the gasket 100 x 100 mm.
With the help of a water level, we carry out the flooring and on the walls are placing the installation locations of the lag (it is better to repel the contour a solid line).
Fort the surface.
On the base, lay a polyethylene film. Each subsequent layer of material must overlap the previous one by 3-5 cm. The joints are sealing tape.
By labels on the wall parallel to the window opening lay a bar. Splicing lags with a corner or perforated plates.
We start the installation of the design. To do this, in the extreme of the window, we make through holes, the diameter of which should be equal to the size of the plastic dowel plug. The drill must pass the body of a wooden profile through and also capture 50-70 mm concrete base.
Tightly apply the item to the floor. Check the coincidence of the holes and install a dowel-nail.
By labels on the wall with gaskets, align the horizontal level and the hammer impact along the nail heap fix the profile. In the same way, we set the following lag at the doorway. Between them stretch the cord on both sides and continue the installation.
When all profiles are laid on their places formed as a result of adjustment of the level of the gap between the base and lags by sealing the mounting foam.
In the interval between the bar, we put the wizard mats and the transverse rails pre-fix the design.

Step between lagami

In accordance with the norms on the device of wooden flooring, the lags are customary parallel to each other.

The distance between them depends on the following factors:

recommended section;

type and thickness of the finish coating.

Table definition of a step between lags.

If thin sheets of the material are used for the device of the upper layer, then the distance between the lags should be reduced, and if the board is used with a thickness of 40-50 mm, the step can be increased.

The gap between the bars is calculated, based on the room area and the direction of laying the lag. It should be borne in mind that with a decrease in distance between the elements the volume of purchased materials is increased.

The distance between the central axes of the profile laid on the ceiling beam should be 0.35-0.45 m, in case of installation of the structure to the precast concrete - 0.6-0.7 m.

If Lag laying is performed on the columns with a thickness of a bar of 40-50 mm, the gap should be 0.8-1.1 m. With large operational loads on a wooden base (200-500 kg / m²), the step between the installed profiles must be taken from the project documentation .

The floor laid on the lags, the design, which is more often used in private house-building. But often it can be found in urban apartments when the concrete base of overlapping covered with a screed is styled, lags covered on top of a decidant from boards or plywood. This design allows to align any floor base, heat or sound insulation material, as well as communication networks, are stacked between lags. And this is a big plus.

As for fastening methods, there are several technologies (old and new), which the wizards are used today. True, not all newcomers know how to lay lags on concrete floor, do not know the nuances of the process itself, which often leads to a decrease in the quality of the final result.

Methods of fastening Lag.

There are two main fastening methods.

Hard mount.
On adjustable.

The main difference between the two positions is that the first option is the installation of lag in one horizontal plane and fastening on rigid fasteners once and for all. The second option is a floating structure in which the lags are also fastened, but they can be adjusted if necessary in height. This uses threaded regulation.

Hard fastening Lag.

In this category today, three varieties of fasteners are used, one of which refers to the old technology, two to the new one. The first recently is used less often and less often, because new fasteners are made of metal, they are stronger and more reliable.

Installation of lag between wooden bobbs

There are small pieces of wooden plates with length of 10-20 cm. The height of the rail, from which they are cut, should not exceed the height of the lag. They are attached to the concrete floor by self-draws, for which two through holes are made in the buses themselves. Through them in the floor make the same holes where a wooden chopper is driven or a plastic dowel is inserted.

It is very important here to correctly arrange the bats on the floor. To do this, on the surface of the concrete screed, parallel lines are applied, which indicate the location of the lag. From the line in two sides, half the width of lags is postponed, that is, is indicated on the floor full width. In these parts and are installed in two bits from each edge.

At the same time, the distance between the fasteners along the lag is selected in the range of 50-60 cm.

Baries are fixed to the floor, lag inserted between them. But now it is necessary to level the placed brushes in one horizontal plane.

For this, the lining of different thicknesses is written out of the sheet of plywood or from the rail.
First, the horizontal lagows laid around the edges are equalized.
Between them stretches the thread anywhere that is checked by level. If the air bubble inside the level rose to one of the lag, then it is located above the second. According to the first, the above, and it will be necessary to align all other elements. Instead of the thread, you can use a long rule if the distance between extreme lags does not exceed 2 m. To do this, you can use a long rail or metal profile.
The first lag lag is attached to the bobbies of self-drawing.
Now we need to lift the second extreme lag to the level of the first. Under it, in places in the installation of bobies put carved chicken pieces. Everything is checked by the level of stretched thread. In this case, the location of the bar is also checked, it should be horizontal.
Laga is aligned, it must be fixed by self-drawing to the bobs.
Now 3-5 rows of threads are stretched between these two elements, which determine one horizontal plane. According to them, it will be necessary to set intermediate elements by fixing them to the bobes.

Installation of lag to metal corners

Today there are gradually groceries into oblivion, because they replaced the smaller and reliable fasteners in the form of metal perforated corners. They are made of galvanized steel, which guarantees long-term operation. The thickness of the product is 2-2.5 mm, which provides increased strength of fasteners. Production technology is cold stamping.

In the design of the corner there are two elements that ensure reliability and convenience of attachment. This is the edge of rigidity and several holes of different diameters from 5 to 14 mm.

The process of installing the lag on the floor in the corners is carried out in the same way as with the use of bobs. Only instead of the latter metal fasteners are installed. The only thing that I wanted to pay attention is to fasten the corners to the concrete floor. If in this way the lag construction in the urban apartment is constructed, it is recommended for metal fasteners to lay a dense insulating material. In principle, for this you can use pieces of old linoleum.

Installation of logging on a self-tapping screw, anchor or dowel

It is believed that this is the easiest way to install and fastening the lag to the concrete base. Depending on the thickness of the timber used for the construction of the floor structure, the type of fastener is selected. For example, the sections of 50x50 mm can be attached to the floor with self-draws. With large sizes of lags, it is better to fix more powerful fasteners.

It is necessary to start with drill holes in the lags themselves. The diameter is determined depending on the fastener selected. The distance between them is 40-80 cm.
Bruks are stacked at the place of installation, and marked through the holes on the floor.
Bruses are shifted, and at the notes are made holes in the floor.
If screws will be used for fastening, plastic dowels are inserted into the holes.
First, two extreme elements of the outdoor design are installed and aligned in one plane. The lining is placed near the mounting connections, the level is checked by the horizontal location.
Then the bars are simply attached to the floor with self-draws, anchors or metal dowels.
After that, between these two lags, 4-5 threads are tensioned, according to which alignment and other elements are carried out.

The length of fasteners is chosen depending on the thickness of the lag stacked and taking into account the gap between the bars and the concrete base. The most important thing is that the fastener entered the concrete floor to go to a depth of 5-6 cm at a minimum. This method of fastening the lag to the concrete floor is not only reliable, the fasteners attract lags to the base, creating additional rigidity of the entire outdoor design.

Adjustable fastening

The idea of \u200b\u200bcreating adjustable fasteners for lag lay on the surface, because the threaded connection is known for a long time. It is the rotation of the car thread nuts that makes it possible to lift or lower the structural element. It simplified the process of aligning bars relative to the floor surface. At the same time, the installation of wooden bars on such fasteners guaranteed their stability, rigidity and reliability. Therefore, today manufacturers offer a fairly wide selection of this kind of fasteners, which flooded the modern market.

The simplest one is the usual hairpin with a thread M8-10. In fact, it is a metal rounder with chopped over the entire length (or partly) thread. The product is covered with galvanized layer, which increases their service life. The only thing that needs to be understood is how to properly install the stud into a concrete floor.

You need to start with drill holes in the lags themselves.
The latter are stacked at the place of their installation, and through the holes are made on the floor marked.
Lags are moved to the side and in the concrete base holes under the diameter of the hairpin are drilled. The basic requirement is the depth of drilling, which should not be less than 6-8 cm.
Special plastic dowels under the diameter of the studs are inserted into the holes.
They screw fasteners in them. At the same time, a wide washer and nut is put on the heel. With the help of the last fastener pressed against the concrete floor. It is very important to set the stud vertically for this, the level is used.
When all fasteners are installed, their protruding ends should be aligned in one horizontal plane. For this, durable threads are tensioning between four extreme ends, a rectangle should turn out. All threads are exhibited horizontally by unscrewing or screwing the studs.
Similarly, intermediate fasteners are then exhibited.
Now nuts are screwed to sticking threaded mounts. Their location is determined by the thickness of the lag.
Above the wide washers.
The installation of bars on studs is carried out.
From above are pounces the washers and the nuts are screwed, which is dragged until the stop.

Adjustable fasteners for lag in purely constructive design a lot. For example, manufacturers offer a finished fastening structure consisting of a metal housing, inside which the stud is already inserted. In this case, the housing is attached to the floor with anchors, self-drawing or dowels after 4-6 holes at the base of the device. At the upper end, the stud can be located with a washer or a platform in the form of a corner with perforation.

Such attachments are very reliable, it usually concerns the lower part in the form of a wide base. It tightly rests on the floor, which increases the stability of the entire design. In this regard, the hairpin loses. Therefore, it can be saved here a little, setting such fasteners less frequently on the line of lags. The market today offers not only metal fastening structures, but also plastic. Fortunately, manufacturers provide warranty on the strength of the product, because in the process of their production plastic with increased technical characteristics. The advantage of this option is the low price.

Note the photo below. It just shows such a plastic adjustable fastening. It is not fixed to the concrete floor, and therefore does not destroy its integrity that in some situations the necessary component of the repair. Such supports for lags are called overhead. At the same time, the fasteners allows you to adjust the height from 1.4 to 8 cm.

Generalizations on the topic

By solving the task of installing the lag onto the concrete floor, it is necessary to understand that the basic requirement for this process is the all the same smooth design located in one horizontal plane. Therefore, despite the fastening methods used, the main thing is to accurately hold the Bruus.