What can you cook from squid: quick and tasty

Pile-screw foundations are quite popular among private developers. They are especially in demand when building relatively lightweight frame houses or buildings from a bar. Such base designs are chosen because of the affordable price, quick installation. And in some cases, due to the peculiarities of the relief or the characteristics of the soils at the construction site, they become the only possible solution.

Foundation of screw piles does not require preliminary heavy excavation work, since they are screwed into the ground, to a certain depth, and with a step calculated in the project. These parameters depend on the massiveness of the future structure, the composition of the soil, the depth of its freezing and the level of occurrence. groundwater... The convenience of this type of construction is that the creation of a pile field can be completed in a matter of days, after which you can immediately proceed to the next stage of work. And this stage necessarily becomes the strapping of the foundation on screw piles.

This process should be carried out according to one of the existing technologies, since the strength of its walls and the duration of the operation of the house will depend on it. Therefore, it is necessary to approach this stage with all responsibility, having decided in advance on the material that will be used for arranging the strapping.

What is a pile foundation strapping and what is it for?

The pile foundation consists of several elements - these are screw or driven piles, which are supports for the rest of the structure, and the strapping, which already serves as the basis for further construction and installation work.

By themselves, screw piles have a very significant bearing capacity. They are screwed in so that the propeller blades rest against dense layers of soil. And the ability of such a support to withstand vertically directed loads depends and from technical characteristics of the pile itself, and on the characteristics of the soils at the construction site.

The reliability of the pile-screw foundation, as, indeed, of any other building foundation, depends on the observance of technological recommendations, as well as on the correctness of its geometric parameters. Today we will consider the main points regarding the arrangement of the wooden strapping of the pile-screw foundation. Possible errors, as well as the rules to be compulsory implementation, we learn from the experience of FORUMHOUSE users.

In this article, we will consider the following questions:

What is the design of the wooden trim is considered a gross violation of existing technology.
What is the best way to mount the strapping of screw piles - from a solid or from a type-setting bar.
How to properly join the timber on the pile heads.
How to prepare timber for installation on piles.
In what sequence is the wooden harness mounted?

Suppose that the pile part of the foundation is already ready: the piles are screwed into the ground, the heads are welded, and the deviation of the horizontal level of the screw piles corresponds to the permissible errors. We will not take responsibility for discussing what distance should be between the piles, to what depth they should be screwed into the ground. Also, we will not give advice on a suitable pile diameter. Only professional designers will reasonably answer these questions, who should be contacted for appropriate calculations. To begin with, we want to warn you against a serious mistake that many non-professional developers are tempted to make.

Removal of load-bearing walls outside the pile foundation

Sometimes private developers try to find solutions that save money on the purchase of building materials and on the work of screwing in additional piles. At the same time, they forget about strength. building structure, which can be violated very rashly.

Here is an example of a gross violation of construction technology, the photo shows a takeaway outer wall outside the pile row.

What can you recommend for people who prioritize questionable economy? The most important thing is not to allow amateur performances, and then everything will work out for you. If building codes provide for the installation of piles under each corner or wall of the future room, then so be it. There is no need to make any overhangs and indents that are not supported under them in the form of a pile firmly screwed into the ground. This will not lead to a reduction in the cost of construction, but it will provide the developer with additional problems.

Guffych FORUMHOUSE user

If you make an overhang or indent, then this structure will hang on the logs. In this case, you will have to make a double strapping from the inside and connect it in some way with the external overhang (so that the structure does not completely disperse). Cheaper (due to savings on piles) will not work, since you will have to spend money on strengthening the lower floor, but this will add specific problems.

If it is planned to attach additional architectural elements to the house (a veranda or, for example, a porch), their corners should also rest on metal piles.

Landlord FORUMHOUSE user

In general, according to the technology of building a pile-screw foundation, piles must be placed under all cuttings, corners and load-bearing walls. This is the most important rule.

A bar or a board - which is better?

Let's talk about what material is best to use to create a wooden trim. Building codes allow for the use of a solid timber(150x150, 150x200 200x200) or a bar made of several boards (50x200). The stacked bar qualitatively replaces the solid bar and even surpasses it in some characteristics. Three boards sewn together replace a 150x200 bar, while four boards are similar to a 200x200 bar.

A beam, one side of which is 200 mm, is placed on the head with the smaller side. In this case, the height of the strapping is equal to 200 mm.

Both options (with a bar and a board) are popular and both are correct. At the same time, having studied the advantages and disadvantages of each material, many developers make their choice in favor of a stitched board.

AlexSpb FORUMHOUSE user

Why would you use a bar 150 * 200? Knock down 3 boards 50 * 200 instead of him and do not suffer with this log. This topic is constantly raised on the forum.

The word "log" was mentioned by the user for a reason. Solid bar is comparatively heavy building material and in conditions of a limited number of working hands to transfer it from place to place (even in conditions of small construction site) will be very difficult. In addition, solid timber does not resist bending well (worse, in any case, than boards placed on the edge), which makes its use less practical.

Boards, unlike timber, must be firmly connected to each other before installing on piles. And these are additional costs, and this, perhaps, is their main disadvantage.

builder FORUMHOUSE user

The boards are hammered together with nails in two rows with a pitch of 20 cm. On each head they are fastened not with one capercaillie, but four.

As for the length of the nails: for a composite beam of three boards (50x200), nails 90 - 120 mm long are sufficient. They make their way from both sides in a checkerboard pattern, as the user builder pointed out. The distance between the nails is 20 ... 45 cm. If the timber is made up of four planks, at first 3 planks are knocked together, then the fourth is attached to them (with exactly the same nails).

Now let's talk about the “wood grouses” mentioned in the quote. "Capercaillie" is a fastening element - a self-tapping screw, the head of which is made in the form of a hexagon (under wrench or wrench).

With the help of the "wood grouse", the timber is attached to the pile head (the wood grouse is screwed in from below).

The diameter of the wood grouse for attaching the strapping bar is 8 ... 10 mm, its length is 100 ... 150 mm.

To prevent the timber or split beams from splitting during screwing in the wood grouses, a hole must first be drilled in the wood.

A small table will help determine the diameter of the drill.

Beam connection and extension technology

The length of the timber (both solid and composite) rarely corresponds to the distance between the pile heads. In order to fit the beams to the dimensions of the foundation, they have to be cut or stitched together. When building up a bar, you must observe one important rule.

Any joints must have a fulcrum underneath. This also applies to type-setting beams and solid timber.

builder

The joints of the boards do not need to be made hanging. Dock the boards at the pile heads.

By splicing the timber in this way, you will increase the consumption of wood, but ensure the strength of the pile lining.

Splicing the timber on the pile heads also needs to be done correctly. If a solid bar is spliced, then cuts are made on two adjacent beams. On one beam, the upper half of the bar is sawn, on the other - the lower one. After that, both beams are connected to a lock. This connection is called a "half-tree connection".

At first glance, everything looks extremely simple. But there is an important rule for joining two elements of one load-bearing beam: both adjacent beams, and not one, must rest on the pile head at the point of connection of the load-bearing beams. Let's start with an example of a wrong connection.

Dimc FORUMHOUSE user

The platform for supporting the beam on the head (at the junction of two purlins) must have a length of at least 90 mm. In the figure, the beams at the junction are "gouged". One has the upper half "stabbed", the other - the lower one. If the beam rests on the pile head only with the "cut" part, then its working section should be taken as the section of only this part. If the bar rests on the head completely (at least 90 mm in length), then everything is correct: the strapping will work like a solid bar.

The run in this case is a load-bearing beam in the harness of a frame house.

This rule also applies to trim gussets. Here are examples of the correct joining of the bar.

The main connection diagrams of the timber (top view).

In order for the beam to have a sufficient support area, the pile heads must initially have dimensions corresponding to the cross-section of the beam.

The question naturally arises: how to lay a bar at the junction of several beams (for example, if three beams are joined at one head at once)? Here's what our user experience suggests.

Dimc

Beam abutments can be arranged in two ways. In the first case (when all the beams are load-bearing), in order to provide a sufficient support area, it is necessary to increase the head. In the second (when only one beam is the carrier) - we put the supporting beam on the head, and the auxiliary one can be attached to the suspension - such a part (in fastening stores it is called the "beam holder").

Increase support platform is performed according to the following scheme:

With the correct placement of the piles, even the auxiliary beams will have several support points, which will make the foundation structure strong enough.

If the design of the strapping is approached more rationally, if, where possible, beams of small width are used, then there should be no problems with the construction of the correct abutments. Here is an example of strapping a frame house.

Dimc

I designed the harness as follows: the purlins (main structural beams), marked with green arrows, are structural. The outer beams consist of 3 boards 50x200, the middle one consists of 4 boards 50x200. And the beams, marked with yellow arrows, are auxiliary (not load-bearing) and consist of 1 board 50x200. They serve to increase the overall rigidity of the structure.

Stacked load-bearing beams (plank beams) at the abutment points must also have a sufficient support area. We present to your attention examples of the correct connections of the typesetting bar in various sections of the strapping.

Preparing timber for installation on piles

Preparing the strapping for installation on piles consists in processing wood with antiseptic compounds, as well as cutting off workpieces of the required length. For antiseptic treatment, bioprotective compounds are best suited, at the same time capable of performing the functions of a primer. You can get acquainted with the recommendations of developers regarding the use of certain protective compounds here.

Some developers strive to dry the timber to the optimum moisture content before installing the strapping. What should be the moisture content of the timber used for the construction of the strapping? Experienced FORUMHOUSE users believe that if the wood has a marketable appearance, if its moisture content does not differ beyond extreme values, then it is better to use it for the construction of the strapping in the form in which it was purchased. And drying a board or timber at home will do more harm than good.

Kedruchu FORUMHOUSE user

It is necessary to dry the timber in a special chamber, and not behind a shed or under a film. The harness is built immediately after the purchase of wood, and it dries already inside the building structure. All that had time to lie down before construction, then only for firewood is good, alas.

This advice is for those who do not want to get a timber twisted in all possible directions after inept drying.

The sequence of construction and fastening of the harness

First of all, the timber, impregnated with an antiseptic and cut in accordance with the previously thought out markings, is laid out on the pile heads. The cuts and grooves in the wood are also made in advance.

After that, you can proceed to the most crucial stage - to align the strapping along the diagonals and along the length of the timber.

Remember: it is normal for errors made during pile tightening. The pile heads by 1-2 cm can be shifted away from the straight line, but the piping that is installed on them must have a perfectly flat geometry.

If you have a rhombus at the base of the house (instead of a clear rectangle or square), then you will never be able to align the walls and roof of the house. It is for this reason that the focus should be on the geometry of the strapping, and not on the alignment of the heads.

The diagonals of the harness, which have been laid but not yet secured to the piles, need to be checked and leveled several times. Only then can the timber be fixed at the corner points of the pile foundation.

After fixing the corners, you should check the geometry of the side and internal beams. To do this, use a rope stretched between the corners along each side of the harness.

The side and inner beams should be fully attached to the pile heads one by one, checking them for displacements away from the straight line.

Leo060147 FORUMHOUSE user

Do I need to put anything between the heads and the timber during the construction of the harness? There is no point in such waterproofing. Unlike concrete or other porous materials, metal has no capillaries. Therefore, capillary moisture from its surface cannot get onto the timber or any other material in any way.

For those who wish to learn from people wise by experience, we recommend that you visit the relevant topic open for discussion on our portal. An article about how to help you save well on time-consuming construction activities. And a video about how important functions the pile piping is designed to perform will be interesting for everyone who plans to start building a wooden house in the near future.

The pile-screw foundation remains one of the most popular solutions for individual construction due to its accessibility, simplicity and stability, even on "floating" soils. However, in order for your home to be even more comfortable and not require repairs as long as possible, you need to make its base even more solid and durable. For this, operations such as tying and closing screw piles are performed.

Inexperienced builders often confuse screw pile tying with foundation closure. While these two steps in the process of building a home base are related in some way, they serve slightly different purposes.

Strapping involves combining the heads of screw piles already installed in the ground into a single structure along the entire perimeter of the foundation and along the contour where they will be erected interior walls buildings.

The lack of strapping, which is done with a bar, board, channel and other materials, will lead to the fact that an uneven load will be exerted on each pile. The consequence of this will be the rapid destruction of the foundation, which will simply "float".

Closing screw piles gives the structure a more aesthetic appearance and minimizes heat loss. After all, since the foundation does not appear and there is an open space under the house, the floor in such a building is unlikely to be warm enough.

Many modern materials are used for closure.

Strapping options

Pile lining

Owners of relatively light structures - wooden or frame-panel boards - should give preference to this particular type of strapping. A grillage from a bar cannot be called very durable, but for such a construction it is the most suitable and affordable option.

Often a beam made of wood is used for strapping. conifers, since its cost is several times less than similar products made of hardwood, and the differences in performance are minimal.

Before installing the grillage, special antiseptic compounds must be applied to the timber to prevent the destruction of wood under the influence of atmospheric factors, and covered with a bituminous waterproofing layer. The latter gives the timber water-repellent properties.

When tying a pile-screw foundation with a bar, do the following:

The pile head is mounted after leveling (cutting) the pile and after pouring concrete into it (if necessary).

Carefully align the installed piles so that the pillars are exactly at the same level.
Heads are mounted on piles.
Waterproofing the material.
On the bar, which falls on the joints of the corners of the house, grooves are cut the right size for the subsequent connection of wooden parts to each other.
The beam is laid out on the pile heads along the perimeter along the entire contour of the foundation so that the joints of the isolated parts of the grillage are fastened to each other on the heads. At the same time, the joints are laid with a tourniquet for better sealing.
Align the grillage and carefully check the angle: it should not deviate from 90 degrees.
The timber is fixed on the pile heads by means of self-tapping screws.

Planking piles

When installing the pile foundation, the boarding has a number of indisputable advantages compared to a bar:

When carrying out work cracks may appear in a bar with a too large cross-section or it deforms significantly.
For the manufacture of beams timber longer than 6 m is not suitable due to the serious problems that may arise while doing this.
Lumber beams are heavy enough, therefore, a whole team of workers will be required to install them. At the same time, a beam of boards is made right next to the foundation, which is much easier.
Plank beams do not require additional drying and are distinguished by increased strength compared to their counterparts from a bar.

The binding of screw piles using a board is performed according to the following algorithm:

There is another way of strapping with a board. The boards are glued to each other and additionally fastened with screws and nails. If the thickness of the boards is small, you can lay them with plywood for greater strength. During installation, it is important to separate the joining points of the boards into different piles and use the proven "half-tree" method.

Piling of piles with a channel (I-beam) or a professional pipe

Metal grillages allow the use of a pile-screw foundation during the construction of not only wooden buildings, but also buildings made of cinder blocks, foam concrete and gas silicate in one floor.

Sometimes, instead of a channel, an I-beam is used, which is highly resistant to compressive loads and provides greater structural rigidity. I-beams with a section of 20 are often used. In the case of a channel, metal beams with a section of about 30 mm are taken for load-bearing walls, for the rest - with a section of about 20 mm.

The foundation is strapped with a channel or I-beam as follows:

The pillars of the piles are installed at the same height and the metal elements of the strapping are treated with an anti-corrosion agent.
Metal beams are placed on the piles so that they are joined in the middle of the pile posts. The channel is cut at right angles at the corner joints of the grillage elements.
The beams are welded to each other and to the pile heads.

The strapping of the pile foundation with a profiled pipe is carried out in almost the same way, however, the resistance of such a material to significant mechanical loads may be much less. Of the advantages of the pipe, we note the low cost and low weight.

Pile tying using reinforced concrete grillage

Reinforced concrete piping comes out almost a third cheaper than metal, but it has a number of disadvantages, the main ones being the laboriousness of the installation and the impossibility of continuing construction until the grillage has completely solidified. This usually takes at least a month.

When tying piles with a reinforced concrete grillage, it is necessary to proceed as follows:

What is used to cover the pile foundation?

A closed screw-pile foundation is a reliable protection against rodents and other animals that can settle in the empty space between the piles. Also, the cladding and finishing of such a base will prevent heat loss in the home and help create a good microclimate there without excess moisture.

The most popular ways to close the pile-screw foundation:

the creation of a hinged plinth;
creation of a shallow tape-type base.

For a hinged plinth, thin and not too powerful composite and polymer materials as well as wood. At the same time, the load on the screw piles turns out to be minimal, and the simplicity and speed of installation, together with the low cost, often captivates.

Any kind of base finishing on piles requires the mandatory presence of two ventilation holes on opposite walls of the house. This will prevent moisture accumulation on the piles and grillage, which will not corrode or rot (in the case of timber).

However, the pile foundation will last longer with a shallow strip plinth, which will provide better protection for the pile frame, ensuring its longevity.

Thermal and waterproofing when closing the plinth

All types of basement finishes involve the arrangement of a heat and waterproofing layer, which is lined with asbestos-cement slabs on top, decorative thermal panels mounted on a crate made of boards or a slate slab, or bricks. All of these materials have their pros and cons:

Tying and closing screw piles is a very important stage in the construction of a house, which determines how soon it will need major repairs.

In contact with

Thanks to accessibility and possibilities self-made, strapping a house with a bar is quite popular. It depends on it how strong and durable it will be new house... Therefore, it is important to know how the strapping is done correctly with a bar.

A strap is a foundation laid on the foundation on which the house is installed. It protects the building from negative influences environment, therefore, must have high moisture resistance.

House strapping is also needed to evenly distribute the weight of the building around the perimeter. In columnar and pile foundations, the lathing unites the elements of the foundation into a single structure, called the grillage.

The harness is best done from a material made from coniferous wood. Compared to deciduous species there are advantages:

longer service life;
higher strength;
less moisture permeability;
lower cost.

Waterproofing

Dampness will form in the places where wood comes into contact with concrete due to the temperature difference. This can lead to rotting. To prevent this phenomenon, a layer of waterproofing is laid between the foundation and the tree. It can be made of roofing felt, roofing felts, polyethylene film, laid in several layers. Bitumen is used less often, since its application is more laborious.

The quality of the strapping timber

Strapping timber with a moisture content above 18% cannot be used without preliminary drying, as it deforms after drying. Drying is carried out indoors, as the tree cracks in the sun. The best material for the first crown, laid on the foundation, larch is considered, since it does not rot and is not afraid of moisture.

The prepared material must be treated with a fire retardant to increase fire resistance. Especially if it is made of pine, which contains flammable resins. Antiseptic impregnation will protect against fungal attack and decay.

Laying and fixing

Even during the design process, it should be borne in mind that strapping the house with a bar is not eternal. Over time, it will need to be replaced. Therefore, it is necessary to provide for such a method of attaching the timber to the foundation, so that repairs can be made without difficulty after lifting the structure with jacks.

For fixation use:

Reinforcing bar dowels are used on strip foundations or slabs. They are laid during the pouring of the foundation. Blind holes are made in the bars, into which the pins will enter 2/3 of the thickness.
Threaded studs are also installed when pouring concrete. Their height must be greater than the thickness of the timber so that the nuts can be tightened.
Fastening to piles using plate or U-shaped heads also allows you to change the harness as needed.
With a one-piece anchor connection, repairs are not possible. When replacing the strapping, you will have to cut it out in parts. Laying a new base using the same method will not work.
If the fastening is made with nails or construction screws, driven / screwed into wooden plugs in the foundation, then this also will not allow replacing the lower crown.

Laying timber on a strip foundation

If there are irregularities on the surface of the concrete, they need to be smoothed or poured. cement screed... Strapping the house with a bar on strip foundation is executed in the following sequence:

The foundation is covered with waterproofing. For reliability, it is recommended to cover it with bitumen, and put two layers of roofing material on top.
At the ends of the beams, nests are made for or in a bowl between themselves in the corners.
Holes are drilled slightly larger than the diameter of the pins or studs.
The timber is laid on the foundation, and the horizontal is checked by the building level. Small differences in height are corrected by placing planks.
Gaskets and wide washers are put on the studs, the nuts are tightened. The protruding part of the thread is cut off with a grinder.
In the corners, adjacent elements are fastened together with nails or self-tapping screws and reinforced with mounting corners.

It also uses a paw or bowl connection and is reinforced with metal plates.

Floor joists are mounted in a convenient way, but with the obligatory support on the foundation. Since metal elements will be inaccessible during operation, they should be coated with an anti-corrosion compound.

When fastening the harness with wooden plugs in the foundation, a material with a high resin content is selected for them. The inner surface of the holes for the plugs is covered with bitumen /

Laying the piping on a pile (screw) foundation

First you need to check the horizontality of the foundation. If some piles turned out to be above the level, they are buried or the excess is cut off. With a slight difference, it is easier to make a cutout in the bar. Gaskets are placed on low supports during installation. Stretching a string between the piles, the evenness of their installation and the squareness of the foundation are checked.

Then the heads are prepared. If the piles protrude more than 0.5 m above the ground, metal plates with holes for fixing the timber are welded to them. With a low position of the supports, heads are used made of pipe sections with a diameter larger than that of the piles. Plates reinforced with kerchiefs are welded to them.

On straight sections, it is more convenient to use U-shaped heads made from a channel. The timber is laid inward and fastened with self-tapping screws through the holes in the side walls. However, on the corner supports, you will have to install plate heads or weld plates bent at right angles. They need to be placed outside the harness.

Depending on the method of joining the bars, their ends are prepared. After laying the waterproofing, the strapping of the pile foundation with a bar begins from the corner:

two adjacent beams are laid, then the rest;
after connecting all the elements, the horizontal and squareness of the strapping is checked again, if necessary, adjustments are made;
fix the bars on the heads, first at the corners.

It is advisable to put it in the joints. This will eliminate squeaks during foundation shrinkage and thermal expansion of the material. When fastening with self-tapping screws, they must be positioned along the longitudinal axis of the beam. Otherwise, the load distribution will be uneven, which can cause the strapping to break. If it is necessary to splice two bars along the length, the junction should be on the support.

Double strapping the house with a bar

This foundation is made when it is necessary to increase the reliability of the strapping of the pile foundation. It is: to raise the house from behind high humidity soil, for the device of a cellar, etc. Double strapping in comparison with a single strap provides:

better heat retention;
high strength, since cuts under the logs can be avoided, which also makes it easier to replace them if necessary.

For the first crown, a bar with a section of 200 × 200 mm is taken and laid in the above way. A second row of material with a size of 100 × 150 mm is mounted on top with overlapping joints (if any) of the first crown. The elements are installed on the end to form a shelf inside the perimeter. Logs are installed on it and fastened with nails.

If desired, the harness can be assembled from staggered boards. This design is stronger than a solid bar for fracture, since the defects in the wood do not coincide in one place. The boards must certainly be fastened with folded nails.

Vacation home usually weighs quite a lot, therefore, its support must be very strong, despite the fact that the foundation is created from separate piles. The binding of screw piles is required to evenly distribute the entire mass of the building. Thanks to this reliable coupling, it is possible to connect the individual piles into a single whole - the foundation.

Features and purpose

Separately located elements, placed along the line, do not contact each other in any way, and form the basis of the pile foundation. To connect the piles into one whole structure, which is needed to lay the base of the foundation, which is the support of the building, it is necessary to equip each pile with a special head, and then create a strapping on it. Moreover, this harness aligns the entire upper line along which the piles are installed into a single flat horizontal plane. This is very important for the sustainability of the future home. It should be noted right away that the pile-screw foundation is the best way creating the basis for buildings.

Such a foundation is environmentally friendly, costs significantly less, is lightweight and is installed very quickly compared to other types of foundations. A dwelling house from a bar can be built with significant benefits. The house itself is built mainly independently, the principle of the constructor is applied. During the laying of the foundation, screw piles are screwed into the ground, work is carried out by analogy with tightening self-tapping screws. Certain difficulties can be encountered when tying screw piles. Since during the installation process, you need to form a grillage. It is worth remembering that a lot will depend on the quality of this work.

Load calculation

When installing a pile foundation on screw supports, you have to work with a foundation for a low load. This scheme is well suited for small sheds, garages and baths made from timber. A weak support will be more than compensated for by the significant construction speed and very low costs. The foundation on screw piles is constructed of vertical supports and horizontal truss. There are usually four supports for the entire system, although there may be more.

The strapping in this case is represented by a grillage. It is created from a material suitable for creating a beam. It can be either concrete, wood, or metal. Wood is placed in the base of the timber, a corner is made of metal, blocks are made of concrete. The binding of screw piles connects the beams to each other and to the grillage. The positiveness of the process directly depends on the careful observance of all the requirements of the installation and installation instructions.

The pile heads must be on the same horizon line, which is controlled when the supports are immersed in the ground. The width of the timber should be one and a half times greater than the diameter of the piles. Another mandatory requirement is that the axis in the center of the supports must necessarily go only through the center of the bar. Screw pile strapping connects supports and beams threaded connection either for welding or for clamps.

What and how to tie?

Strapping material

Installation depends on the characteristics of the material of the beam and foundation. The binding of screw piles with a bar is very common. But many are interested in the question of whether it is necessary to use the technology with the use of a bar, if it is possible to use stronger materials, for example, concrete or metal. It should be noted that timber is the best option for a grillage when building houses made of wood or on frame technology, since the timber has great strength and very high resistance to temperature extremes. When treated with an antiseptic that protects the tree from rot, the service life of the timber is longer than that of steel beams. Binding of screw piles with a beam is carried out using a technology that provides for fastening the beams to the thread, or fixing all parts of the grillage using clamps.

Thread mounting

This technique is used only for a foundation made in a U-shape. A bar is installed in the recesses on the flanges and fixed with a support using self-tapping screws. Roofing material is placed between the beams and piles. Connect the beams at the corners into a paw or bowl. Corner fasteners can be made with spikes. For corners outside, corner-shaped elements are used. This technique allows you not to waste time on the tongue-and-groove system.

The best harness screw piles - this is the laying of a fastener element on an outer corner. Fastening is carried out with self-tapping screws to the bars.

Using clamps

Such restraint is used in systems using piles with no flange. In this case, a rectangular platform is welded on top of the pile head, a grillage beam is placed on it. The U-shaped clamp is laid over the beam, its width should be equal to the beam width. The edges of the clamp, which will hang down, are welded or threaded to the vertical support. At the corners of the beam, the connection is made using a metal corner.

Application of channel and I-beam

On lightly loaded structures, you can erect a grillage from a channel. Such structures include, for example, baths and sheds. The pile and metal grillage is tied by welding. The elements of the base and structure are attached to a circular seam. The assembly procedure consists in installing the channel on the pile heads. The element can be reinforced in such a way that the side faces will "look" downward. The strapping of screw piles with a channel is also carried out in the opposite direction, in which case the edges are directed upwards.

When the channel is located along such a system, the resistance to loads on the transverse parts of the structure is much better. It turns out the formwork, which must be filled with mortar, this is how the wall masonry is formed for the reinforcing belt. To ensure a high strength strapping, an I-beam of equal dimensions is used instead of the channel. When channels and beams meet at the corners, then welding is applied. At the end of the strapping of the supports, the grillage is covered with an anti-corrosion agent.

Boarding

Planking screw piles often involves using cedar, larch, pine or spruce material. In this case, the foundation fasteners begin with the production of a beam, at the base of which boards are used. The elements are glued together and fixed with self-tapping screws or a bolt system. When using thin boards in the construction of the foundation, it is additionally necessary to press them down with plywood sheets. It is imperative to ensure that all joints of the boards are located on different piles.

The boards are interconnected in half a tree. The beams are placed on the edge and fixed with piles.

The binding of screw piles using this technology is carried out as follows:

inner, middle and outer contours are created (the herringbone principle);
elements are collected and fixed in turn;
between the channel, the pile heads and the strapping itself, a layer of roofing material is required for waterproofing;
if the height of the strapping turned out to be more than 40 cm, then the base is additionally strengthened with a professional pipe.

Using a pipe from a profile for strapping with an I-beam

If you want to make the strapping with an I-beam, then you need to prefer the material with perforations. The I-beam must be welded as tightly and back to back as possible. The preference in choosing this particular material lies in its high strength and low weight. With this design, the profile pipe acts as a spacer, which increases the durability of the building foundation. For strapping, the professional pipe is welded from the outside along the entire perimeter of the foundation.

Do you need a harness during construction?

Very often, future owners of private houses think about whether screw pile strapping is needed or not. The foundation on piles is a structure made of supports embedded in the ground. The installation of these supports is carried out very carefully, but even so they will not be able to answer maximum requirements strength will not be fully reliable. The floors may well distort during the subsequent operation of the house, and the strapping will definitely not allow the base of the building to lose strength, which will make it very strong, and, therefore, the house will last for many years.

Important: very strong building materials must be used. The beam will fully allow you to get a fairly strong base that can withstand impressive loads.

When choosing a strapping from a wooden bar, you should adhere to the following order of work:

at the end of the installation of screw piles and alignment, metal platforms of 20x20 cm sheet steel with a thickness of at least 4 mm should be welded onto their heads;
in these fragments metal sheets it is necessary to drill four holes with a diameter of 8 mm to secure the timber;
at the end of the work, the welding seams and heads must be treated with an anti-corrosion compound;
it is necessary to lay waterproofing on top, usually from roofing material in two or three layers, which will prevent the accumulation of moisture at the junctions of metal and wood;
one row of timber or a package of boards is placed on pre-prepared sites;

The geometry of the future building can be checked by measuring the diagonals of the frame from the outside with a tape measure or a simple rope.

it is important to lay the joints of the timber from the end in a "dovetail" or "paw in paw";
when all the parameters are checked, the bars can be fixed to the supports with screws, which should have a diameter of 8 mm and a length of 150 mm, they should be screwed in with a wrench;
first you need to make a hole in the timber with a drill with a diameter of 6 mm for three quarters of the screw length. This is necessary so that the timber does not crack;
even more reliable, the structure is fastened with bolts with a diameter of 8 mm, which must pass through the beam from top to bottom. To do this, you must first make a hole using a drill with a depth of 10 mm. This is necessary for fastening the head of the bolt and washer, the diameter must be at least 30 mm.