Correct tying of screw piles

Brusovye apartment houses can be built not only cheap, 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 laying the foundation will need to be screwed into the ground, in this case it is necessary to act on the technology of screwing conventional 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, laid 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 structure vertical 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 created from any material that is suitable for forming a beam. To do this, you usually use:

• concrete;
• metal;
• wood.

The latter option is the basis for the bar, it is possible to make a corner or channel from metal, as for concrete, it is represented in this case by blocks. Strapping the screw piles provides for the connection of the beams with each other and with a grillage. The success of this process will depend on the implementation of recommendations. The pile head 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 joining the supports and beams using one of three technologies, among them installation:

• For welding;
• threaded connection;
• Clamps.

The technology can be selected depending on the design 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, which can protect the material from rotting, then by durability such structures 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 when the foundation has a U-shaped pommel. The beam is installed in the recess of the flange and fixed with support through pins or 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.

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

Using clamps

Fixing to the clamps is carried out in those systems that 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 horizontal grill beam is laid. Above the beam is a U-shaped clamp, whose width should be equal to the corresponding value of the beam. The edges of the yoke, which will hang down, should be connected using a threaded connection or welding with a vertical support. In the corners of 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 with 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, you can arrange the element and the side faces down. The threading of the screw piles with the channel can also be carried out in the opposite direction, in this case the side faces will be directed upwards.

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 provide a high-strength grill, then instead of a channel, an I-beam of the same dimensions can be used. Channel bars and beams are joined at the corners by butt - use the welding method. After completing the strapping of supports, grillage should be covered with an anti-corrosion agent.

Tying the board

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

• Larch;
• Cedar;
• Ate;
• Pine trees.

The reinforcement of the foundation in this case begins with the production of a beam 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.

Connection of boards among themselves is carried out in half a tree. Beams must be located on the edge and fixed with piles. If you have decided to make a string of screw piles using this technology, you can create an inner, outer and middle contours by the principle of a Christmas tree, collecting and fixing the elements in turn. Between the channel (if it has a place to be), pile headers and piping should be a waterproofing layer of roofing material. When the height of the strapping is more than 40 cm, the foundation should be further strengthened with a pipe.

Use of a profile pipe for an I-beam

When deciding to make an I-beam tie, you should prefer a professional material whose walls have perforations. I-bar is tightly welded to the ends. Its advantage lies in its high strength and low weight. If the piping of the screw piles is carried out by 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 binding

Quite often novice home masters are wondering 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 distort the operation of 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 the pillars of the structure. 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 of high quality and reliability when reinforcing the pile foundation. To carry out 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 or listen 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.