Installation of timber strapping on screw piles: Instruction + Video

Installation of timber strapping on screw piles: Instruction + Video Do-it-yourself tying of screw piles with a bar. A country house is a large-sized building, which means that the support must necessarily be strong, and this applies even to the case when the foundation is made of separate piles. Do-it-yourself strapping of screw piles with a beam is needed so that the mass of the building is evenly distributed.

Thanks to such a reliable coupling, it will be possible to connect the piles into a single structure - the foundation.

Purpose and features

Separately placed elements, which are placed along the line and do not contact each other in any way, will form the basis of the pile foundation.

In order to connect the piles into a single structure, which will serve as the basis for laying the foundation, the support of the building, a special head should be added to each pile, and strapping should be made on it. And even more, such a strapping will help to align the entire line located on top, along which the piles go into an even and uniform plane (horizontal). This is very important - the stability of the house will depend on it. We note right away that the pile-screw foundation is an ideal option for making a base for construction.

Also, this type of foundation is considered environmentally friendly, it comes out cheaper than many analogues in cost, lightweight and can be quickly installed compared to other types of foundation.

A residential building from a bar can be built and at the same time profitable. The house itself is built with their own hands on the principle of a designer. When laying the foundation, screw piles begin to screw into the ground, the work is similar to screwing in self-tapping screws. There is a chance of encountering certain difficulties when tying screw piles. Since during the installation process, it is imperative to form a grillage.

Remember that the result will depend on how well the work is done.

Performing load calculations

Installation of timber strapping on screw piles: Instruction + Video During installation of a pile-type foundation on screw the supports will have to work with the base for a light load. This scheme is perfect for small sheds, as well as for baths, garages made of timber. A weak support is perfectly compensated for by the erection speed and low costs. The foundation on the strapping of screw piles with a bar is designed from supports that are installed vertically, as well as horizontally located straps.

Usually 4 supports are used for such a system, but more can be used.

In this case, the strapping is represented by a grillage. I make it from a material that is suitable for making a beam. It can be wood, metal, concrete. Wood is laid at the base of the bar, a corner is made of metal, and blocks are made of concrete.

The strapping helps to connect the beams to the grillage and to each other. How long the process will last directly depends on how carefully you follow all the requirements of the instructions for laying and installation work.

The heads of the piles, by all means, must be on a single horizon line, and this is easy to control when the supports are immersed in the ground. The width of the timber must be 1.5 times the diameter of the piles.

Another prerequisite is that in the center of the supports, the axis must necessarily pass only through the center of the bar. The harness helps to connect the beams and supports using a threaded connection, either on clamps or for welding.

How and what to tie?

Material for binding

Installation will depend on the characteristics of the material of the beam and foundation. Timbering of screw piles is a common option. But most are interested in the question of whether it is required to use a technology with the use of a bar, if you can use materials with greater reliability, metal or concrete.

We note right away that the timber is the best option for the grillage when building a frame house or a house made of wood, since the timber has great strength and high resistance to temperature extremes. When treated with an antiseptic, which helps to protect the wood from decay, the service life of the timber increases and becomes longer than that of steel beams. Piling of piles with a bar is carried out using a technology that provides for fastening the beams to the thread, or fixing each part of the grillage with a clamp is performed.

Installation on the thread

This technique is used only for the foundation, which is U-shaped. A bar must be installed in the depressions on the flanges and fixed with a self-tapping screw.

Roofing material is placed between the piles and beams. The beams are connected into a thicket or paw at the corners. Corner fixing can be done with tenons. For corners outside, elements in the form of corners are used. This technique makes it possible not to waste time on the system of grooves and ridges.

Note that the best way to tie a screw pile is to lay the fastener element at the outer corner. Fastening is carried out using self-tapping screws to the bars.

Using the clamp

This method of fastening is used in systems that use piles and do not have a flange. On top of the pile head, you need to weld a platform in the shape of a rectangle, and on top of it a grillage tank is laid. The U-shaped clamp is placed on top of the beam, and its width must necessarily be equal to the beam width.

The hanging ends of the clamp should be welded or threaded to a vertical support. At the corners of the beam, the connection is made using metal corners.

Using an I-beam and a channel

If the structure is not heavily loaded, you can make a grillage from a channel. This design includes a barn or a bath. A grillage made of metal and piles are tied with welding.

Structural elements and bases are attached to a circular seam. The assembly procedure consists in installing the channel on the head.The element can be reinforced in such a way that the side edges seem to look down. Tying the screw piles with a channel is also performed in the opposite direction, in this case the edges are directed upwards.

With such an arrangement of the channel, the resistance to loads on the transverse parts of the structure will be many times better.

Thus, you get the formwork, which should be poured with mortar, and it will turn out to form the wall masonry for the armopoyas. In order to ensure the high strength of the strapping, an I-beam of the same size is used instead of the channel. When the beams and channels are joined at the corners, welding is used. At the end of tying the supports, the grillage is covered with a product that does not allow corrosion to form.


Do-it-yourself planking of screw piles often involves the use of material made of larch, cedar, spruce or pine.

Fastening the foundation in this case begins with the manufacture of a beam, based on boards. The elements should be glued together and fixed with self-tapping screws or installed on a bolt system. When using thin boards in foundation construction, they should be additionally pressed down with plywood sheets. Be sure to ensure that all joints are located on different piles. We connect the boards to each other in half a tree.

The beams should be placed on the edge and secured with piles.

Pile tying using this technology is performed as follows:

  • Installation of timber strapping on screw piles: Instruction + Video Make the inner, outer and middle contour (according to the herringbone principle).
  • Elements are assembled and installed in turn.
  • Be sure to install a layer of roofing material for waterproofing between the heads, channel and piping.
  • If the height of the strapping is more than 0.

    4 meters, then the additional base should be reinforced with a profile pipe.

Using profile pipes for strapping with an I-beam

If you want, you can make a strapping with an I-beam, and then choose a material with perforated holes. The I-beam should be welded as tightly and back to back as possible. The preference in choosing this material is low weight and high strength. The profile pipe in this structure will act as a spacer, which will increase the durability and improve the performance of the building.

For strapping, the profile pipe should be welded from the outside along the entire perimeter of the base.

Is strapping required during construction?

Quite often, future owners of their own home begin to think about whether strapping of screw piles is required or not. The foundation on piles is a structure of supports that are deepened into the ground. The installation of these supports is carried out extremely carefully, but even such supports do not always meet all strength requirements and are not fully reliable.The floors can skew with the further use of the house, and the strapping will definitely not make it possible to lose the strength of the base of the building, which will make it strong, and the house will serve for many years.

Important! The sturdiest building materials should be used. The beam will make it possible to make a sufficiently strong base that can withstand heavy loads.

Recommendations of specialists

When selecting a trim from a bar, a certain order of work should be followed:

  • When the installation of screw piles and leveling is completed, platforms made of metal, more precisely from sheet steel 200 * 200 mm and with a thickness of no more than 4 mm, should be welded onto the heads.
  • Installation of timber strapping on screw piles: Instruction + Video In such fragments of metal sheets, 4 holes should be drilled, the diameter of which is no more than 0.8 cm in order to fix the timber.

  • When the work is finished, weld seams and heads should be treated with an anti-corrosion compound.
  • We put waterproofing on top, as a rule, it is 2-3 layers of roofing material, which makes it possible to prevent the accumulation of moisture at the junctions of wood and moisture.
  • A package of planks or a row of beams should be laid on a previously prepared area.

Good advice! You can check the geometry of the future building if you measure the diagonals of the frame with a simple rope or tape measure outside.

  • The joints of the timber should be laid according to the paw-in-paw principle from the front side.

  • When everything is checked, the bars can be attached to the supports using screws, which should be 0.8 cm in diameter and 15 cm in length, it is required to screw in with a wrench.
  • In advance, you should make a hole in the timber with a drill with a diameter of 0.6 cm and 3/4 of the length of the screw. This is necessary so that the timber does not crack.

  • A more reliable way to attach the structure is to use bolts with a diameter of 0.8 cm. To do this, make a hole in advance with a drill, it should be 1 cm deep.This is required in order to attach the bolt head and washers , in this case, the diameter should not be less than 3 cm.

Please note, that when the binding of the screw piles with a beam for the foundation is completed, it should be checked again that the geometry the structure is correct and everything is in order with the diagonal, and after that we can assume that everything is ready and you can start building a house.

The strapping is also called the grillage. At the moment, it is the best option, which is of high quality and greater reliability when strengthening the foundation on piles. You can create a reliable support for the house with your own hands, but before starting work you will need to prepare roofing material and a building level, self-tapping screws. Don't forget about metal corners and a hammer. The selection of the remaining tools and materials will depend on the technology, ideally, use the technology using clamps and threaded connections.

Be sure to pay attention to the fact that the correct strapping must also be treated with an antiseptic, which will protect the wood from moisture and bacteria.