Who has not heard such names as the Wright brothers, Thomas Edison, Sergei Korolev. These inventors and designers went down in history thanks to their mind. There are personalities known only in a narrow circle, such as Brighton, who invented the electric chair. Some are undeservedly forgotten, the inventions of others bring glory to the creator, like the well-known Rubik's cube. But there are things that have changed people's lives more than a toy square. If we talk about construction and repair, then we should remember the screws, which you can’t drive into a tree otherwise than with a hammer, and it’s impossible to unscrew them at all. Or wooden pegs driven into the wall. Or the fall of mezzanines and chandeliers. All these problems were solved together with the invention of the anchor bolt.
Application of anchor bolts
As soon as anchor bolts came into use, they were widely used in construction and operational installation. They are especially good for fixing to concrete. And the harder, denser the concrete, the more securely the anchors hold. In addition to concrete structures, anchor bolts, the dimensions of which are increased in width, are used for all types of block orbrickwork. The main task of the anchors is to firmly fix both the structure itself and the attachments and equipment.
Specially dimensioned concrete anchor bolts are used to attach wood and metal structural parts to concrete. The length and width of the bolts must be selected taking into account both the attached part and the thickness of the load-bearing wall. The installation technology itself is very simple. When the appropriate anchor bolt is selected, a hole is made in the wall using a perforator. Then you need to insert it and tighten the clamping nut until it stops.
Types of anchors
An indicator of high reliability is precisely the huge assortment that distinguishes anchor bolts. The dimensions, shape, design, functionality of these products make them indispensable for fastening work for any type of material. There are two main types - an anchor with a nut and an anchor with a bolt. For fixing metal and wooden structures, the following anchors are used: one- and two-spacers with a nut; 4-segment expanding; wedge anchor; driving and with shock thrust. It is easier to hang technological or household equipment on a simple or 4-segment anchor hook. The same 4-segment and simple anchors, but with a ring, will help to pull electrical and telephone cables.
Product design
Anchor bolts for concrete have different sizes, but they all have the same design. And since we are talking about the expansion principle of the product, the main structural element is the spacer body (sleeve). Second inThe most important detail is the internal expanding nut for the anchor with the bolt. For a product with a nut, this will be an expansion cone on a stud. The ring anchor and the hook anchor have a part design with a nut, just the outer side of the stud is lengthened and bent. Despite the anti-corrosion coating, a polymer seal is provided to prevent moisture from entering the product.
Classifying anchor bolts, GOST divided them into three main groups:
- public;
- frame;
- reinforced.
So when buying, you should ask at least the country of origin, in China they hardly use carbon steel.
Anchor bolt sizes
First of all, when choosing the size of the anchor, remember that it is better to play it safe than to collect fragments of the air conditioner or buy a new boiler. Buy anchor bolts that are slightly larger than you think. Usually on standard products, the parameters are printed on the sleeve. If there are none, the outer diameter is measured with a caliper. In the digital row 12x10x100 mm, the first digit indicates the diameter of the case. This means that the drill must be selected appropriately. The second number is the size of the bolt or stud, which will help you choose the key to clamp. The third digit shows the total length. When choosing it, consider the wall thickness. Have anchor bolts sizes:
- on outer diameter from 6 to 24 mm;
- total length from 60 to 400 mm.
Finally, a few more words should be said about the benefits of an anchor bolt. Its price is not high at all, and the savings are huge. Depending on the design and size, the cost of a bolt ranges from 3 to 80 rubles per piece. Previously, before the appearance of anchors at the joints and installation of attachments at the design level, it was necessary to provide metal mortgages for welding. And the point is not the cost of iron, but the fact that all the calculations were made by a specialist, always with a higher education, or even a whole department of such people with a corresponding salary.
