Wooden posts - why are they still relevant?
For the production of supports use:
- metal;
- reinforced concrete;
- tree.
On high voltage power lines, metal supports are mainly installed, since only such powerful structures can withstand the large weight of insulators and wires. But what about the old, reliable tree? Did the supports of wood forever disappear?
It is probably too early to write off the poles from the tree, because in most respects they are in many respects superior to metal and reinforced concrete, and in some cases they can not be dispensed with. What are the advantages of wooden supports:
- Wood is much cheaper than reinforced concrete products.
- It's much easier to deliver them to the installation site. For one flight a special car is capable of transporting several dozen such supports.
- It is difficult to find a replacement for wooden posts in zones of seismic activity.
- They easily bear the pressure of the wind.
- Due to their light weight( in comparison with metal and reinforced concrete), they are perfectly supported by wires.
- With high dielectric characteristics, such poles remain safe even after the breakdown of insulators.
- The electric wooden post is able to stand without any problems for at least forty years. While the reinforced concrete structures are only designed for 25-35.
Electric wooden post - feature of service of natural materials
Wooden supports for power lines are produced from coniferous trees: spruce, pine and fir. In their wood there is a resin, which is the best natural antiseptic and preservative. Do poles from rounded logs, resulting in a clean trunk, without bark.
Further logs are impregnated with a special compound, due to this their service life is significantly increased. Shale or creosote oil, as well as mixtures containing chrome, copper and arsenic, are used as impregnating liquids. The best antiseptic solution absorbs pine logs.
Thanks to this processing, the installation of wooden poles is carried out without any preparation: immediately into the ground. The only thing that needs to be done before mounting the supports is to cover their ends with special lids or protective paste.
Installation of wooden poles and other supports for household needs
And now let's remember that wood is used not only in industry. For example, carved wooden poles for the fence served as an ornament of the farmsteads. Now these traditions are gradually reviving. The choice of material for the pillars depends mainly on the preferences and thickness of the host's wallet. And there is now something to choose from.
Take, for example, the pillars of wood. They are simple and reliable, but, alas, are expensive. And besides, without special impregnation for a long time will not stand. Even processing with copper sulfate will extend the service life by only a dozen years. They are often used for small fences and low hedges.
Asbestos-cement pipes are affordable, durable and durable. The only inconvenience is the difficulty of fastening the rails to them. Most often now, metal pipes are used as pillars. They are distinguished by their reliability, durability and durability.
Even the frozen water inside can not completely destroy them, which can not be said about asbestos cement supports.
Install such poles quite simply. It all depends on the nature of the soil at the site of the fence. At first, the holes are drilled by the drill, where the column is set, after which concrete is poured. But if this method works on free-flowing sandy soils, then it is completely ineffective on the heaves.
If on the site the soil is light, then you can do without concreting altogether, but simply drill holes into the diameter of the pillars. On the ridges, holes are drilled a bit more than the diameter of the pillars, but in this case the free space is not poured with concrete, but covered with small gravel. Then it is carefully rammed.