What are concrete anchors and how are they used?

The correctness of the selection of anchors for concrete and other fasteners affects the degree of reliability of fastening of a particular structure to the wall. In the existing variety of hardware it is very easy to get confused by a person who is not well versed in the intricacies of repair science. Before going to the store, you need to decide what is the purpose of each type of fastener, for example, what are driving or chemical anchors for concrete.

Varieties

Among the fasteners for concrete anchor are something akin to heavy artillery. Their purpose is to mount structures of rather heavy weight to the walls. Often they are used as fixing elements for window and door frames, lighting devices, they also anchoring reinforcement in concrete.

All products operate according to a single principle: screwing in a special fastener leads to the expansion of the product, which ensures that the anchor is firmly fixed in the wall. Anchor fasteners can be of several types and have different sizes, below we consider them in more detail.

Zabivny

1. The name suggests: this anchor for concrete is hammered into a hole in the wall that is pre-drilled for this with a hammer.
2. It is necessary to clean the hole and remove dust and debris from it.
3. After that, what was required to fasten at this place is hung, and a special stud is screwed into the anchor, which is fixed by a nut.

The material for the manufacture of most of these anchors is galvanized steel, the price depends on their length and diameter. It happens that the multifunctional fasteners MTA also belong to the group of driven anchors.

Tip: Drive-in anchors cannot be used in materials of low density (for example, in foam blocks).

Клиновые

The difference between such anchors and devices from the previous group is that the part does not need to be hung before fixing the stud, and there is no need to clean the hole under the anchor from contamination. The required part is fixed directly to the anchor, after which it is fixed with a nut.

Stainless steel anchors and electro-galvanized anchors also belong to this group of hardware. Their heads have the ability to drown in the material that they fixed.

Tip: use a wedge system when fixing window and door frames, while sometimes there are difficulties with the alignment of the main surface. To facilitate such works, cutting of reinforced concrete with diamond circles is used.

PFG

1. Designed to work with structures of concrete of poor quality and in cases where the fixation is performed in the ceilings and walls of old houses.
2. This fastener has a large expansion area in comparison with other types of such hardware.
3. It works like this:

• the main part of the anchor is hammered into the wall;
• Attaching the necessary part to it is done with a bolt.

There are PFG-anchors that secure the cables or ropes. The end of the stud of such an attachment is a ring, which can also be used to fix the chandelier. Anchors, the end of which has the shape of the letter "G", are used mainly when attaching water heaters.

Chemical

The principle of its operation is similar to the action of the adhesive:

1. Before using such fasteners, the drilled hole in the wall is thoroughly cleaned.to insert a vial of adhesive.
2. A pin is screwed into it, and the whole structure is left alone for some time.. The composition may dry within a few minutes or a few hours.

The duration of hardening is affected by the ambient temperature. Do not allow the load on the chemical anchor until the glue is completely cured. A feature of these products is that internal stress is not created in the wall, and this reduces the likelihood of its destruction. Below shows the instructions for its installation in the surface. (See also the article How to drill a concrete wall with a drill: features.)

You can also meet other varieties of anchors. For example, there are mortgages or fixtures such as rod clips. They are usually used in the construction of apartment buildings.

Eternal fastener - dowel for concrete

The dowel is called a spacer, which is made of nylon or polypropylene, and its principle of operation is similar to the anchor one. Only it cannot be attributed to independent fasteners, since the fixation of the structure fixed on the wall or ceiling is carried out with the help of a self-tapping screw or special nails (when working with dowels-nails). In order to improve the reliability of fixation, it can be equipped with special devices in the form of antennae or spines.

A pair of dowels + screw will not be able to withstand structures of the same weight that can be trusted to anchors. But when you need to fix shelves, brackets for TVs or other equipment, you can rely on them.

Dowels are driven into the hole with a conventional hammer. Screws are easily screwed into them with a screwdriver, you can do it with a screwdriver. Nails are easily hammered.

Tip: if during the work you need to drill through concrete, it is best to apply for this diamond drilling holes in the concrete with the help of special crowns.

There are dowel-nails, which are designed to work with a special mechanical gun. Such a fastener is made of metal, and in appearance is similar to a bullet. This type of fastener is convenient in cases when you need to hang a large number of small items on the wall.

Nagel on concrete - quickly but firmly

Bolts, or as they are called, screws for concrete, are an indispensable tool to fix everything you need in a rather difficult place for this - at the edge of the concrete wall. This fastener does without additional fixing due to the direct screwing into the prepared hole, drilling through which to remove dust particles. To increase the fastening strength, you can pour a small amount of epoxy glue into the hole.

Most applications of nogs do without pre-drilling, because this fastener twists directly into the concrete. If preparation of the hole cannot be avoided, a drill is taken to create it, but not a punch.

A tool of greater power can lead to the destruction of the wall. Screwing is done with a screwdriver, after which it is almost impossible to get the dowel out of concrete, therefore it is worthwhile to take measurements with all care. (See also the article Concrete Sealer: Features.)

The secret of selecting the necessary drill to create holes for the placement of any kind of fasteners is extremely simple: the values ​​of their diameters must coincide completely. This means that an anchor with a diameter of 8 mm must be installed with the assistance of an 8 mm drill.

Conclusion

The existing today various devices and products for fixing objects in concrete, makes it possible to significantly facilitate the work and shorten the repair process. In the construction most often used anchor is driving, wedge-shaped, chemical, such as PFG, also use dowels and dowels. The video in this article will help you find additional information on this topic.