At present, no construction or repairDo not use such a fastening element as an anchor dowel. This is a metal part that is twisted, laid or jammed into a pre-prepared hole in a solid base.
These fasteners are the samean integral part in the construction and repair work, like nails or screws. The market is replete with various kinds of such details. What is an anchor, what kinds does it have and where it is applied?
The first anchor dowel was invented andpatented by engineer D. Rawlings in 1913. And in 1958, his German colleague Arthur Fisher invented nylon sleeves for such fasteners. Before that wooden "chopiki" was used.
The anchor is translated from German as an "anchor".This is a fastening element, which is designed to hold any structures in the supporting bases. Fastening of the anchor in the base is due to the expansion of the outer parts, by clogging or twisting in them a dowel or bolt. Such elements provide a reliable and high-quality connection. They are able to endure quite large loads.
Anchor dowel (GOST 28778-90) consists of twoparts. This is a spacer and not a spacer. The first is working. It expands in the process of clogging or twisting and thus provides a reliable fastening. Also, the anchor dowel has a cuff that prevents complete immersion in the hole. It can be secret, have different shapes: round or cylindrical.
Anchor fasteners differ in purpose, typesinstallation, manufacturing materials. The classification is fairly simple. So, on purpose, the anchor dowels are divided into two types. The first is the designation on the grounds:
As for the application, then inaccording to it allocate furniture, frame and facade dowels. Of particular note are the elements for thermal insulation materials, in the jargon of builders, they are called "mushrooms". These types of fasteners are made of plastic. They have a wide cap, designed to connect the heat-insulating plates with the base. Facade and frame dowels have an elongated, not expansion part. They are designed for mounting heavy structures. Are made, as a rule, from metal.
В технологии производства анкерных дюбелей могут used different types of materials. But most often it is steel or other alloys and plastic (nylon, polypropylene, etc.). As a rule, metal anchor dowel is used for fastening heavy structures, which will later bear the load. These can be windows, doors or elements of facade systems, as well as various structural elements. Steel anchors are also used for fixing foundation elements. They are made of alloy steel and are able to withstand heavy loads.
Plastic anchor dowels are used forinstallation of lighter designs. These are different objects from the profile for the GCR. Anchors with nylon plugs also found their niche in domestic use. For example, they are used for fixing lamps, various decorative elements, paintings, underwear cords and ropes. In such fasteners, caps are replaced by hooks, rings, and other elements for various needs. At the same time, plastic dowels are used for hollow or cellular bases.
They are different:
This method is used for fastening elementsdesigns when the dowel passes through the “body” of the fastened materials. Details for this method should have a small (short) spacer part. It should be noted that in case of end-to-end installation, special rules should be observed The anchor dowel must be so long that 2/3 of it is at the base, and 1/3 - in the body of the structure. Otherwise, this method of installation is inefficient.
This option involves the installationdowels in the base for the entire length. Mounting fasteners made in pre-drilled holes. Its diameter must correspond to the diameter of the dowel. Length - 3-5 mm more. This reserve is needed to ensure that the dust and dust that is formed during the drilling of the hole does not prevent the dowel from fully immersing it.