The procedure for binding screw piles timber - step by step instructions with photos

pile foundations in many cases, preferable to other types of bases, especially in the area of ​​low-rise construction, as it allows significant savings in its construction.Step strapping timbers screw piles is a must and is one of the most complex and demanding.But before we consider the order of the meeting, you need to understand why it is necessary to engage in and how important the quality.

What is a pile?The hollow tube made of high-quality steel, which has a tapered end with a welded "blades".After screwing it into the ground rises above the surface only part of the "trunk", which are diametrically drilled hole (technology).After the installation of piles and pre-alignment "tops" are cut.As they strengthen the walls of the house?That is why before you proceed with their construction, installation wizard engaged in a kind of "spacer" between the base and the structure itself.

Why rail?

It solves several problems:

• rigidly binds all installed piles into a single structure;
• allows a more precise alignment of the upper sections in one plane (horizontal), as in the process of screwing supports technological error to avoid difficult, especially if the work is carried out independently;
• evenly distributes around the perimeter of the entire load on the foundation;
• partially protects the walls from ground impact.

For strapping use different methods (eg, construction of raft foundation - one of its variants), and materials - timber, channel (shown in the figure).

Still, the best option is binding not just wood and timbers, as it has a rectangular cross section, which simplifies the work on its installation (including mounting and the lower row of the walls).

Single rail

The most effective way is a combination in which the combination of two techniques - fixing screws (anchors) + collars (corners, plates).

Setting end walls

These elements are mounted on the "tops" all piles.Typically, this metal plate, which supports are welded at the ends.

But in the case of strapping timbers, given its strict size, it is advisable to install the flanges (the letter "P" in inverted form).The distance between the "legs letters" parameter depends on the workpieces, as they will be laid between them (the minimum beam cross section Strapping - 150 mm).Naturally, the holes for fastening elements are prepared in advance.

Preparing blanks

Their ends are made drunk, and what type of timber connections choose - to decide the master.It is understood that the first is much simpler and requires much experience, but it is less reliable.Additionally, the grooves are prepared under the joists.

timber Stacking and securing

The first thing to do - lay all flanges waterproofing material (the cheapest - roofing material).As an option - bitumen + p / e film.The problem - the wood must not come into contact with the metal.At least, because that on it during operation will condense moisture and gradually soak into the timber.

work always begins with the corners.The first 2 adjacent beams previously joined, aligned, and then verify the compliance of 90º connection (using polygon).After readjusting the workpiece fastened hardware.Screws significantly better than nails, because they are easier to repair removed if necessary.For the rest of the corners - is similar.

timber laying on the sides of the difficulties is not, given that all products have the same (calibrated) length.These compounds, from the viewpoint of maintainability, it is desirable to "butt".Between themselves, they are held together by metal plates and straps (options are shown in the figure).

Inside the perimeter technique differs little from the above (for example - in the figure).

All joints in order to avoid the emergence of "cold bridges", must be warm (for it is expedient to use jute tape).

strapping Processing

Generally, beams covered with mastic asphalt, which is superimposed on top of the waterproofing material.You can then proceed to the next stage of construction.

feature dual binding

It is considered more reliable and maintainable.

technology is not fundamentally different, but there are some nuances:

• for the 1st "level" is taken 200 mm beam;
• second - section of 100 x 150;thus laying the 2nd row is being installed "in the ass" blanks (lower side);
• in the 2nd level are not made gashes under logs;
• place boards joints along the rows should be spaced.

Useful tips

• strapping recommended for timber from softwood.The best option - a larch.Since the material is located directly above the ground, then it will affect the moisture intensely.Its influence reduces different impregnating compositions, but they have an expiration date.The peculiarity of larch is that this tree when wet only gets stronger.
• After welding all the places exposed to the effects of temperature, it is advisable to treat the rust inhibitor.The fact that the piles have a protective coating which is damaged by welding.
• For more accurate alignment horizontal beam at the point of installation on a flange or wedge is enclosed, or made a small drink.
• In the absence of raft foundation can further strengthen the foundation of "the struts" of metal.

There are recommendations for how to make strapping "gluing" (like timber) made of planks.And the argument is - will be cheaper.How to skillfully neither been written text, whatever the merits of such a method may be invoked - this is not worth .Perhaps the "homemade" and will be useful somewhere else, but if it comes to the foundation, it is better not to experiment - any alteration will come much more expensive.