/ / Anchor dowel: types, application, GOST

Anchor dowel: types, application, GOST


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?

anchor plug

A bit of history

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.

What is such a fastener?

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

Types and classification of dowels

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:

  • For sheet materials (plywood, OSB, GKL, chipboard).Such dowels are popularly called "butterflies" because of their characteristic shape. Such an anchor fastener is suitable for mounting lightweight structures on hollow walls. For fixing heavier structures from sheet materials, it is necessary to use a dowel with external thread. These elements are twisted in sheets GKL and further reliably hold any designs.
  • For porous or cellular substrates. Such are hollow bricks, cellular blocks, foam concrete, etc. These dowels are made of soft plastic materials. They have an elongated spacer.
  • For dense full-bodied materials.These include concrete, brick, stone and so on. N. Types of fasteners for such base can be made both from metal and from plastic. They have a long, non-spreading part.

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.

types of fasteners

Materials of manufacture

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.

metal anchor dowel

Types of anchors by type of installation

They are different:

  1. Mortgage. Anchor fasteners, which are designed for heavy loads. Mounted in the frame of the building or wall in the process of its construction.
  2. Spacer.Metal mounting unit, which is also designed for heavy loads. Popular in construction, finishing and repair work. It is mounted due to the friction force of the element installed in the design (sleeve or spring ring), which is pushed apart by the translational movement of the bolt.
  3. Wedge. Attaches the parts to the base. It has a metal rod with a spacer: coupling, tapered tail and nut.
  4. Zabivnoy. In such dowels, a nail with special notches is used, which prevent its return.
  5. FrameSuch anchor dowel is used for fastening plastic and wooden frames. This is a lightweight version of fasteners with a special form of the head, which allows you to level the fastening structure with the base.

dowel gost

Through installation method

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.

anchor plug

Preliminary installation method

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.

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