Correct tying of screw piles

Brusovye apartment houses can be built not onlycheap, but also profitable. In this case, most of the work is done on its own. This concerns the assembly of the house itself, which provides for the use of the constructor principle. Screw piles at the stage of foundation laying will need to be screwed into the ground, in this case it is necessary to operate on the technology of screwing the usual screws. With some difficulties you can only face when tying the screw piles. This is due to the fact that during the operation it will be necessary to form a grillage, and the success of the construction depends on the quality of the work.

Theory of the process

If you decide to install a pile foundation,stacked on screw supports, then you will have to work with a lightly loaded base. The design is suitable for low-rise log houses, garages, barns and one-story baths. The bearing capacity of such bases is compensated by the impressive speed of construction and a modest estimate.

The foundation on piles has in the constructionVertical supports and straps, which are located horizontally. As for the supports, they can be 4 or more. The horizontal strapping is represented by a grillage. It can be made from any material that is suitable for forming a beam. To do this, you usually use:

• concrete;
• metal;
• wood.

The latter option forms the basis of the bar, frommetal it is possible to make a corner or a channel, as to concrete, it is represented in this case by blocks. Strapping of screw piles provides for the connection of beams between each other and with a grillage. The success of this process will depend on compliance with the recommendations. The pile heads should be on the same level, which will be controlled when the supports are immersed in the soil. The width of the bar for grillage should be more than 1.5 times compared with the diameter of the piles. The third condition that must be met is that the central axis of the supports must pass through the center of the bar.

Tying methods

The threading of the screw piles may involve the connection of supports and beams using one of three technologies, among them installation:

• for welding;
• threaded connection;
• clamps.

You can choose the technology depending on thestructural features of the beam material and the strength of the foundation. Piling of screw piles with a bar is done quite often. However, many home masters are wondering whether it is worth using this technology if there are more solid and durable materials like concrete and steel. But the cant be the best option for grillage of frame and wooden houses. It has high heat resistance and impressive strength.

If the bar is treated with an antiseptic that canto protect the material from rotting, then for durability such designs will be able to compete even with steel beams. Strapping of the screw piles can be carried out using one of two technologies, the first involves the installation of beams on a threaded pair, while the other involves fixing the grillage elements to the clamps.

Screwed fitting

Such a technique is applicable only in the case whenthe foundation has an U-shaped pommel. In the recess of the flange, a bar is installed and fixed with a support through pins or self-tapping screws. Between the pile and the beam is placed ruberoid or oiled cardboard. Join the beams in the corners can be according to the classical technology: the paw or the bowl.

The fixing of the corner structure can beis carried out by means of a groove and a ridge or a thorn. For angular coupling, an external connecting element in the form of a corner can be used. This technique allows you to save time, which could be spent on the elements of the pile-and-groove system. Correct tying of screw piles in this case consists in imposing the fastening element on the outer corner. Fastening in this case is carried out by screws to mating bars.

Using clamps

Fixing to the clamps is carried out in those systems,which have piles without a flange as a base. On top of the head of the piles in this case, a rectangular area is welded, where the girder beam is laid. Above the beam is a U-shaped yoke, the width of which must be equal to the corresponding value of the beam. The edges of the yoke, which will hang down, should be connected with a threaded joint or welding with a vertical support. In the corners, the joists are connected by means of a metal corner or by another technology.

Use of I-beam and channel

If we are talking about a lightly loaded design, then we can build a grillage from the channel. This should include:

• cabins;
• Baths;
• sheds;
• garages.

A grillage of metal and piles is tied withusing welding. All structural elements and bases are attached to the seam of a circular type. The assembly process involves setting the channel to the head of the piles, the element can be placed and the side faces down. The threading of the screw piles with the channel can also be carried out in the opposite direction, in which case the side faces will be directed upward.

The first option provides sufficient strength. If the channel is positioned in this way, it will be able to resist lateral loads more effectively. Turning the channels, you get a formwork, which is usually poured with mortar, forming a reinforcing belt for the wall masonry. If you want to ensure the grillage high strength, then instead of the channel can be used I-beam of the same size. Channel bars and beams are joined at the corners by butt - use the welding method. After the strapping of the supports, the grillage should be covered with an anticorrosive agent.

Tying the board

Strapping screw piles with boards often involves the use of coniferous wood, namely:

• larch;
• cedar;
• ate;
• Pine trees.

Strengthening the foundation in this case beginsfrom the manufacture of beams on the basis of the board. Elements of the material are glued together and fixed with screws or bolts. Using thin boards, you must additionally attach them to plywood sheets. In order to achieve the strength of the structure, it is important to ensure that the joints of the boards are on different piles.

The connection between the boards is carried out inhalf a tree. Beams must be located on the edge and fixed with piles. If you decide to make a screw pile tying along such a technology, you can create an inner, outer and middle contours according to the herringbone principle, collecting and fixing the elements in turn. Between the channel (if it has a place to be), pile headers and strapping should be a waterproofing layer of roofing material. When the height of the strapping is more than 40 cm, the base should also be reinforced with a pipe.

Use of a profile pipe for an I-beam

When deciding to make an I-beam tie,prefer a professional material, the walls of which have perforations. The I-bar is tightly welded to the ends. Its advantage lies in its high strength and low weight. If the threading of the screw piles is carried out using such a technology, the proftrub can act as a spacer to increase the life of the foundation. As a piping, the pipe is welded from the outside along the perimeter of the foundation.

Necessity of tying

Quite often novice home masterswonder about the need for tying the screw piles or not. The fact is that the foundation on piles is a structure of supports that are deepened into the ground. Their installation can be carried out as carefully as possible, but even in this case they will not meet the requirements of strength and reliability. Under such conditions, the floor will help to warp while operating the house, but the strapping will not let the base lose its strength, making it durable and reliable.

Strapping is the connection and fastening between each otherpillars of construction. To do this, use the strongest building materials. For example, the bar allows you to get a solid foundation, which will be able to undergo significant loads.

Conclusion

Another name for the strapping is grillage. Today, this is one of the options, which is distinguished by high quality and reliability in strengthening the pile foundation. For the work, you have to prepare a roofing material and a building level, as well as anchors and screws. Do not forget about the presence of a hammer and metal corners. The list of other materials and tools will be dictated by technology.

You can choose it yourself orlisten to the opinion of professionals. The most optimal, according to many experts, is the use of clamps and threaded connections. But the strapping of the bar necessarily requires the use of antiseptic agents that will be able to protect the wood from destruction under the influence of bacteria and moisture.