Anchor installation. What is wall anchoring? Screwing in an anchor bolt: instructions

Anker plays very important role regardless of the element of which structure it is - a machine installed on a concrete floor or a bolt ladder mounted on a wall.

It provides a connection with the foundation, and if this connection turns out to be fragile, the structure is threatened with destruction, no matter how strong it is from the inside. For reliability, the anchor should be installed following a certain technology.

So, what does it take to properly and securely fasten an anchor bolt?

You need to look at the pages of the online magazine about construction and read the following step-by-step instructions

1. The chemical anchor is very durable and reliable. It can be installed in any material: brick, stone, cellular concrete, wood, etc. Since its fastening is carried out with the help of glue, it not only does not weaken the base to which it is attached, but in many cases makes it even stronger.

To install the anchor, we drill a hole of the desired diameter to the required depth. We clean it with a ruff brush, blow it with a pump or a pear.

2.Fill it 2/3 hole adhesive mixture- epoxy or polymer resin. A container with glue (cartridge) can be designed in different ways - a syringe, a tube, etc. The methods of mixing the glue components also differ. Whatever the version of the adhesive cartridge, you must act strictly according to the instructions attached to the product.

3. With a rotational movement, we install the anchor in the hole to its full depth. We remove the drips of glue from the base. The time the anchor is ready to accept the load depends on the brand of glue, it is indicated in the instructions. After the specified time, any structure can be attached to the anchor.

4.Mechanical anchors are installed without glue. The principle of their operation is based on the wedging of the anchor sleeve inside the hole, due to which its reliable fixation in the base is achieved.

We drill and clean the hole in the same way as described above. Through the part to be mounted, we insert the wedge anchor into the hole and hammer it with a hammer until the nut rests against the part to be fixed. Tighten the nut with the necessary (but not excessive) force. As a result of tightening, the end of the anchor wedges the sleeve and is securely fixed in the hole.

5. Ways of wedging may be different. If for this there is a special rod inserted inside the anchor, then after installing the bolt in the hole, we hammer this rod with hammer blows inward. Thus, we wedge the sleeve and fix the anchor in the hole.

6.To install the wedge anchor with internal thread, required special tool- a rod similar to a center punch or beard.

After the anchor is installed, we place this tool inside and wedge the sleeve with hammer blows. Then, remove the punch beard and wrap it in threaded hole anchor fixing screw.

7. The so-called frame anchor has two wedged zones - at the base and in the fixed part.

We drive the frame anchor into the base through the part to be fixed. We wrap the screw with the necessary force. In this case, the lower part of the anchor, located at the base, will first wedge, then the upper part, located in the part. As a result, the latter will be firmly attached to the base.

8. Purchased products are very convenient to use - especially if you have to install a large number of anchors. However, if necessary, it can be firmly fixed in any base and homemade device- bolt or rod of any kind.

9. We drill a hole with a diameter of 1-2 mm larger than the diameter of the anchor. We clean the hole well from crumbs and dust. Fill the hole in half or a little more epoxy resin or putty with a hardener. With a rotational movement and light blows of the hammer, we install the anchor in the hole. We remove resin drips. After some time, when the epoxy hardens a little (but not completely), we level it around the anchor flush with the base. You can use this anchor in about a day.

Often in household, and not only, people need to attach various elements, For example, mounting structures on concrete. It's hard to do. To facilitate the task of the master, an anchor bolt for concrete is used. It is a universal fastener when installed in dense and hard material. Many structures are placed under the anchor support.

Operating principle

With their help, even heavy structures are attached. Even in underground mining, bolting will be enough to attach various designs. The principle of fastening is not complicated. The anchor bolt consists of an inner bolt, a nut at the end and a body. There is a lining to prevent moisture from getting inside.

Varieties

There are many different bolts. Each of them is aimed at a certain kind of consolidation.

wedge

Before installing this type of bolt, a hole is drilled where it will be inserted. The main difference of this screw is that it is fastened without a jacket. There is a small wedge in the middle of the sleeve, it tends to expand when screwed in. After the anchor has been driven in, it is imperative to tighten the nut that secures the bolt after the plug is enlarged. A wedge-shaped anchor bolt is used when fastening structures of huge weight into concrete. It is durable and reliable.

Spacer

To date, it is the most popular. This bolt has different sizes, which is an absolute plus, from two to twelve centimeters in length, and in diameter from four tenths to two centimeters. They also have a bushing that runs the length of the stem. Inside there is a thread and a head that bursts the sleeve. With the help of this elementary mechanism, fasteners are fixed. Requires the previous one, just like a wedge bolt.

expanding

Inside the mount there is a sleeve with petals and a nut. These anchor bolts are practical to use. It is also a plus that it is not difficult to dismantle them. The need for this arises when it is necessary to cut reinforced concrete diamond circles. Before using for surfaces with metal particles, they must be pulled out without fail, because tool breakage is possible.

Chemical

Typically, the purpose of these anchor bolts is to bond the material to the concrete. The package with glue is placed in a specially prepared hole. When pressed, the composition that is in the bolt is squeezed out. This ensures secure fastening. But this particular type is not popular among workers, because the price is high.

Zabivnoy

He also has a sleeve, a wedge and cutouts. It is they who provide an increase in the bolt when hitting it. They hit the anchor itself so that the wedge rests on the bottom of the hole. Driving bolts are both metal and polymer. There is also another variety - nylon, their main difference from the previous ones is that they have a carving in the form of a shark tooth. If you decide to use it, you will not lose, this type of fastening is the most reliable. But do not use it when working with an old, crumbling surface.

How to fix

When installing an anchor bolt for the first time, this may seem complicated to you, but over time, everything is already done, as the people say, on the machine.

To begin with, a hole is drilled in the concrete structure to which the structure will be attached. At this stage of work, the main thing is to choose the right one, its diameter and length. The conceived diameter is selected according to the size of the anchor. But the length should not be shorter than the bolt. It should be borne in mind that if the anchor does not completely enter the wall, it will need to be removed and the hole drilled. And it is difficult to pull the bolt out of the concrete, even if it is not tightened.

Then you need to clean the hole from dust. If the anchor bolt goes into it easily and simply, then something is wrong, the possibility that you used a slightly bent drill cannot be ruled out. After all, this type of fastener is driven into the wall with a hammer.

Then we tighten the nut, while its body inside the hole increases. She stretches all the way. Then it needs to be unscrewed, then what is planned clings, and the nut is screwed to its original position.

When installing driven structures, instead of screwing, you drive a screw.

Instruction

The chemical anchor is very strong and reliable. It can be installed in any material: brick, stone, cellular concrete, wood, etc. Since it is fastened with glue, it not only does not weaken the base to which it is attached, but in many cases makes it even stronger.
To install the anchor, drill a hole of the desired diameter to the required depth. Clean it with a ruff brush, blow or.

Fill 2/3 of the hole with an adhesive mixture - epoxy or polymer resin. A container with glue (cartridge) can be designed in different ways - a syringe, a tube, etc. The methods of mixing the glue components also differ. Whatever the adhesive version, you need to act strictly according to the instructions attached to the product.

Rotate the anchor into the hole to its full depth. Wipe any adhesive drips from the base. The time the anchor is ready to accept the load depends on the brand of glue, it is indicated in the instructions. After the specified time, any structure can be attached to the anchor.

Mechanical anchors are installed without glue. The principle of their operation is based on the wedging of the anchor sleeve inside the hole, due to which its reliable fixation in the base is achieved.
Drill and clean the hole in the same way as described above. Through the part to be mounted, insert the wedge anchor into the hole and hammer it in with a hammer until the nut rests against the part to be fixed. Tighten the nut to the required (but not excessive) torque. As a result of tightening, the end of the anchor wedges the sleeve and is securely fixed in the hole.

Wedging methods may be different. If for this there is a special rod inserted inside the anchor, then after installing the bolt in the hole, hammer this rod with hammer blows inward. This will wedge the sleeve and fix the anchor in the hole.

To install a wedge anchor with an internal thread, a special tool is required - a rod that looks like a center punch or barb.
After placing the anchor in the hole, place this tool inside and tap the bushing with a hammer. Then remove the center punch and screw the fixing screw into the threaded hole of the anchor.

The so-called frame anchor has two wedging zones - at the base and in the fastened part.
Drive the frame anchor into the base through the part to be fixed. Tighten the screw with the necessary force. In this case, the lower, located in the base, part of the anchor will wedge first, then the upper, located in the part. As a result, the latter will be firmly attached to the base.

Purchased products are very convenient to use - especially if you have to install a large number of anchors. However, if necessary, you can firmly fix in any base and a home-made device - a bolt or rod of any kind.

Drill a hole 1-2mm larger than the anchor. Clean the hole well from crumbs and dust. Fill the hole half way or more with epoxy or putty. Using a twisting motion and light hammer blows, install the anchor into the hole. Remove resin drips. After some time, when the resin has hardened slightly (but not completely), smooth it around the anchor flush with the base. You can use this anchor in about a day.

Anchors for concrete are special fasteners necessary for reliable fixation of various objects and elements on concrete structures. Fasteners are used where the strength of the walls does not allow the use of screws or nails. Usually, appliances, furniture are attached to the walls in this way, they are also relevant for the installation of doors and windows.

Externally, the concrete anchor looks like a bolt. It is made of galvanized or stainless steel in the form of a cylinder with an extension in the form of a cone at the end of the fastening. After installation, the expansion part opens into concrete and ensures maximum density between the elements, guaranteeing reliability.

Installation of an anchor for concrete is carried out in a hole right size. The high holding capacity of the anchor is provided by the force of friction, gluing with special composition, the interaction of the thrust element with the inner walls of the hole.

Working principle and application

Concrete is a porous non-uniform structure material. And in the places of fastenings, various forces appear - for twisting, bending, shearing, shearing, compression, tearing. Their concrete anchor takes over, distributing together with the supporting structure.

The basic principles of operation of anchors for concrete:

At the moment of interaction of the base material and the anchor, a friction force appears - the expansion is performed by dowels, metal collets.
When at the depth of anchoring the material gives resistance to fracture or crushing - due to the collet bushings on the fasteners, curved shape rod, extensions.
Loads at the point of contact between the base and the rod are compensated by tangential stresses during embedding or gluing - this is how embedded smooth, adhesive anchors work.

Anchors for concrete can be different designs, various kinds, sizes. They are made of special steel according to GOST, covered with a layer of anti-corrosion agent. The rod can be 6-20 mm in diameter, up to 220 mm long.

Any anchor includes the following parts:

The bolt itself
Cone with thread layer inside
Sleeve with special cutouts

Anchors perform a constructive or load-bearing function. The bearing function is implemented in cases of connecting floor slabs, beams, columns, balcony consoles, landings and marches, finishing and wall panels, engineering equipment, communications, hoods, ceiling lights etc. Anchors are also used for mounting logs on concrete or hollow floors. They are attached to the walls of electrical equipment, hanging furniture.

Structural fasteners are used to counteract the displacement of parts of the assembly, if their stability is guaranteed by their own weight, and anchors are also relevant for straightening in construction.

Types and types of anchors and methods of their fastening

Anchors for concrete can be very different, use one or more acting forces - stop, intermolecular bonding during gluing, friction, bending, compression, etc. According to the purpose, anchors for concrete are frame, ceiling, foundation and universal. In shape - curved and straight, with a prefabricated or one-piece structure.

The surface of the anchor can be corrugated or smooth. Exists different types fasteners depending on the contact area - those used for porous material and for dense. According to the method of installation, anchor fasteners for concrete may involve through connection, gluing, driving, screwing, etc.

Of great importance is the material from which the hardware is made. If it is steel of strength class 6.8 and higher, covered with an anti-corrosion coating, then the fastening will be as strong as possible. But brass will not withstand serious vertical loads.

Spacers

Expansion anchors for concrete are usually used with nuts, here the working force is friction. They are a small threaded stud with a cone-shaped tip and a sleeve. When the fastener is screwed into the base, it wedged and firmly holds the fastener in the monolith.

The main advantages of such anchors are: the ability to perform through installation, ease and simplicity in installation, excellent bearing capacity. Wedge anchors are chosen mainly for dense concretes, they sink deep, they cannot be used a second time.

If a hook (bracket) is installed on the anchor bolt instead of a nut, the fastening is suitable for attachments. Wedge anchors are sleeve and sleeve. Such a bolt looks like a sleeve with special cutouts, at the end it can be made with a stud with a conical extension or a wedge nut. Used for medium and high density bases. A small contact area even with a minimum diameter of the product makes it possible to withstand significant loads.

Anchor bolt with nut can be electro galvanized (KA), hot dip galvanized (HOD), and acid resistant (CAN). This also includes screw anchors made of stainless steel (RAR).

driven

Drive-in anchors for concrete are chosen for dense concretes. These are short bolts with an internal cone and metric thread. The fastener wedges the base when the stud or bolt is screwed into the concrete, the fastener does not protrude to the surface.

Installation of anchors in concrete using this type of bolts is relevant when installing ducts, ceiling ducts, install engineering equipment. Before driving the anchor into concrete wall, drill an appropriate hole. Then the hardware is hammered in, it is wedged with a center punch, the threaded rod of the required length is screwed in.

This type of anchor includes a dowel-nail, a ceiling anchor. It is convenient to mount suspensions, rails, Armstrong ceilings on them. Often, fasteners are used as fire or vandal-proof, since the bolt is fixed.

frame

Used to fasten door and window frames. The sleeve is made with a cut along the length, a small wedge nut in the process of tightening well presses the structure against the opening, bringing it to the desired position. To protect against displacement and rotation around its own axis, there are stops at the top of the sleeve.

Self-tapping screws for concrete

Here, the reliability of the connection is ensured by a thread made along the entire length of the bolt. In the process of screwing into a concrete base, a powerful resistance to tearing or shearing of the product is created. Therefore, when using this type of fastener, a very high bearing capacity is observed. The self-tapping screw is able to easily take up to 100 kilograms of load, it is very reliable in operation and easy to install.

expanding

In everyday life, this type of anchor is called a "butterfly" (aka Molly bolt). It is used for mounting cornices, shelves, lamps, paintings and other elements in hollow structures with a small bearing capacity. The collet on a screw or bolt is made in the form of a wedged skirt, which, in the process of screwing the rod into the base, abuts against the inside of the base cavity. By outside collets are deepened into concrete with special spikes that do not allow the bolt to move or rotate at the time of installation.

chemical anchor

Anchor bolt for concrete is made in the format of a semi-liquid mass, which quickly hardens. It is with this mass that the bolt or stud is glued into the monolith. Thanks to the composition, it is possible to ensure a reliable connection between the base and the bolt without local or point stresses, but with a uniform distribution of the load along the entire length of the fastener.

Chemical anchors for concrete do not provoke internal stress at all, significantly reducing the risk of damage and deformation.

Dimensions and characteristics of anchor bolts

Before deciding which anchor is best for concrete in performing specific tasks, it is necessary to consider not only the variety of designs, but also the dimensions, because fasteners can be of various lengths and diameters.

Anchor classification by size:

Small - section up to 8 mm / length up to 55
Medium anchors - up to 12/120 millimeters
Large - with a maximum diameter of 24 and a length of 220 millimeters

An anchor bolt for concrete can have different sizes: the characteristics are determined by three indicators. So, if you decipher the marking M8 10 / 60-115, then it will be: the thread diameter of the anchor M8, the outer diameter is 10 (it is with this diameter that the hole for fasteners is drilled, this is the diameter of the drill), the length of the anchor is 115 millimeters, the approximate thickness of the element that it is planned to strengthen - 60 millimeters.

Everything specifications anchors are indicated in the table, these can be weight, maximum torque and permissible bending moment, minimum pull-out force, optimal loads, distance between axes and to the edge, etc. In accordance with all these parameters, suitable products are selected and high-quality fastening to concrete is performed with anchors.

Installation instructions

Before you can fix the anchor bolt in concrete, you need to prepare the tools. To complete the work you will need: wrench, construction vacuum cleaner, a drill with a perforator function or a perforator, a drill bit for concrete, a hammer.

drilling

First, the base is carefully marked for future drilling sites. Here you need to do everything as accurately as possible, since after installation it is not possible to pull out the anchor bolt from concrete - the fixation is very strong. Further, according to the marking, holes of the required length are drilled in the concrete (measured by the expansion part of the bolt), setting the limiter on the drill.

The distance from the edge of the wall must be at least 2.5 times the depth of the hole. Next, the holes must be cleaned with a vacuum cleaner, compressed air from a can, a rubber pear. If it was not possible to remove the crumb without a residue, you can deepen the hole by 1-2 centimeters.

Installation of an anchor with a nut

The spacer part of the bolt is inserted into the base, driven in with a hammer until it is completely immersed in concrete (so that the edges are flush with the wall). Then a threaded stud or bolt is inserted, the nut is tightened, twisting as much as necessary so that it is impossible to turn further.

It is desirable to know in advance how to use a particular type of fastener. Manufacturers can set the maximum torque - in such cases, you will need a torque wrench. Tightening to the stop when working with some bases (aerated concrete, foam concrete) can cause deformation and destruction of the material.

Chemical anchor installation

To install chemical fasteners in concrete, you need a slightly modified set of tools: you will need a hammer drill, a wrench, a construction vacuum cleaner, as well as threaded studs, glue or capsules, mounting gun. For a large number of fasteners, glue is chosen, the choice of capsules (ampoules) is relevant where small amounts of work are planned.

First mark the base, drill and clean the holes. Before pouring the adhesive solution into the concrete, it is advisable to screw in a mesh sleeve, thanks to which Chemical substance linger inside. Then you need to fill the holes 2/3 with glue (using a mounting gun) or install the capsules, insert the pin, gradually screwing it in to uniform distribution adhesive. Now you need to wait until the glue dries and only then tighten the nut with a wrench.

Pros and cons of application

The main advantages of using anchor bolts for concrete are maximum reliability and structural strength. The anchors can withstand enormous loads, guaranteeing quality fastening in concrete with characteristics that cannot be achieved using other types of fasteners.

The main advantages of anchors for concrete:

Resistant to deformation and corrosion
Ease, simplicity and high speed of installation
Resistance to dynamic and static loads of various types
Large selection of anchors by length, diameter, fastening type, load, function, shape, material, etc.

Choosing an anchor bolt for the implementation of a particular task is not difficult. There are no obvious shortcomings in this type of fastener. Unless you need to remember some features: the importance of markup accuracy, correct selection drills for concrete and determining the depth of the hole, the need to use a specific set of tools.

For foam concrete

Foam concrete is used today in many areas due to poor flammability, low density, excellent thermal insulation properties and resistance to temperature changes of the material. The structure of the foam block is a large number of frozen bubbles. For fixing the material, screws, dowels, self-tapping screws can be used. The highest level of reliability is provided by plastic and chemical anchors.

For aerated concrete

For aerated concrete, wedge anchors with a length of at least 10-15 centimeters are chosen. With this fastening, it is possible to achieve maximum reliability and strength, taking into account the porous structure of the material. Also, a strong fixation is provided by a chemical anchor.

How to install an anchor bolt in concrete

The whole process is quite simple, the main thing is to correctly measure and implement everything as accurately as possible. But there are several nuances that must be taken into account.

Practical tips for installing anchors in concrete:

The fastener strength index is affected not only by the anchor, but also by the quality of the base material (concrete in this case), proper preparation for installation, taking into account the material of the attached structure and the design of the bolt itself.
If a finish layer is applied to the wall, the hole must be deeper, as the finish is usually less durable than concrete.
It is advisable to take a drill 0.5 mm thinner than the diameter of the future hole.
When working with a hammer drill, it is best to use a tip made of a special carbide material.
Carefully read the instructions - the package with anchors must indicate the allowable force and the maximum number of revolutions.
When screwing the anchor in, in no case turn it all the way, as the material may collapse.

Eternal fastener: dowel for concrete

A dowel is an expansion element made of polypropylene or nylon, which is similar in function and operation to an anchor. It is not used independently, it is fixed in concrete with special nails or self-tapping screws. To strengthen the fixation, it is often performed with spikes or antennae.

This type of fastening is used where there are no too large loads on concrete - fastening shelves, hooks for TVs, lighting fixtures. Dowels are hammered into the concrete wall with a hammer, self-tapping screws are screwed with a screwdriver or screwdriver. To drive in nails, you also need a regular hammer.

You can also find dowel-nails designed for use with a mechanical gun. Fasteners in concrete are made of metal, outwardly it is somewhat reminiscent of a bullet. It is relevant where you need to hang a large number of objects of small size.

Concrete dowel: fast but strong

Nagels are those that are most often used for arranging fasteners near the edges of a concrete wall. The fastener does not require additional fixation, it is screwed into the hole, where a little epoxy glue is first poured. Drilling holes is not necessary - the dowel can be screwed directly into the concrete wall. If a hole in the concrete still needs to be made, then it is better to choose a drill (a hammer drill can damage the wall).

They are screwed in with a screwdriver - and after that it is no longer possible to unscrew the dowel back. Therefore, preliminary marking must be carried out especially carefully.

Conclusion

Variety of anchors for concrete foundations today it is simply huge - a wide range is offered by many manufacturers. So choose desired type anchors in accordance with the type of foundation, expected loads, length, shape, material and other parameters will not be difficult. Further, everything depends on the accuracy of measurements and the quality of the work performed by the master.

Not so long ago, cork-chops made of wood were used as fasteners, which had to be hammered into pre-prepared holes. Such products were unreliable and short-lived, as the wood dried out, which led to loose fasteners. Plastic dowels were also not widely used, they could not withstand a lot of weight. to replace wood and plastic products modern anchor bolts have arrived, which greatly simplify installation hinged structures and do not slip out of the concrete.

To understand in more detail what an anchor is, consider the classification of these fasteners.

Varieties of anchor bolts

First of all, anchor fasteners differ in the way they work. They are:

Chemical. Such products are a capsule with glue, which is placed in the hole. As soon as the anchor begins to screw into the wall or any other surface, the capsule is crushed and the adhesive polymerizes, firmly fixing the fastener. Chemical anchor bolt for concrete is indispensable for hollow floor slabs. However, such products are expensive, so they are not so popular. Another disadvantage is that after installing the anchor, you will have to wait for some time until the glue “grabs”.
Mechanical. Bolts of this type are fastened due to the expansion force, when the products are screwed into the concrete mass. Fasteners of this type are cheaper and are used much more often.

In turn, a mechanical anchor bolt can be:

Klinov

The wedge anchor (KA) is attached thanks to a special wedge located at the inner end of its sleeve. When clogging, the fastener bursts the sleeve, thanks to which the element is securely fixed.

Also on sale are wedge-type anchor bolts with a nut, in which wedging is carried out thanks to a separate rod. After fixing the fastener, it is removed from the hole, and a special stud is installed in its place.

Anchor bolt with nut is electro-galvanized (KA), acid-resistant (KAN) or hot-dip galvanized (KAK). Also, this type of fastener can include a screw anchor made of "stainless steel" (RAR).

slaughtered

Hammered anchors are simple in design - they do not have a wedge. Fastening is carried out thanks to the special edges of the sleeve, made of softer metal, which are deformed during the clogging of the sleeve.

To fix such an anchor, it is not necessary to measure the place of drilling to the nearest millimeter, deviations in diameter and depth are also allowed.

This type of anchor is suitable for brickwork, natural stone and monolithic concrete surfaces.

expanding

Expandable anchor (or "butterfly") is used for thin-walled and sheet materials. The design of such a fastener is characterized by the presence of slots located in the middle of the sleeve. In the process of tightening the screw, its back part begins to move along the thread, and the sleeve is deformed, thereby forming peculiar petals that press the anchor (these elements are very clearly visible in the photo).

The main advantage of the "butterfly" is that the product can be dismantled at any time. To do this, you do not have to perform diamond cutting of concrete and other labor-intensive work.

"Butterfly" is suitable for drywall, plastic and fiberboard. If the wall contains metal elements(rebar), then before installing the anchors in concrete, it is necessary to remove the reinforcing particles.

spacer

Expansion anchor bolts for concrete are considered the most popular, due to their ease of use. When installing them, it is not necessary to strictly observe the tolerances, depth and diameter of the hole. This device operates on the principle of collet expansion of the sleeve by screwing a cone-shaped sleeve into it.

There is also a two-space anchor for concrete, in which there are two moving couplings at once. Due to this "structure" the product is characterized by increased fastening strength.

These types of anchors are used only for concrete and solid bricks.

In addition, special products equipped with hooks and rings can be found on sale. The anchor loop is very convenient for mounting lighting fixtures and communications.

For the production of fastening anchors, stainless steel coated with a layer of anti-corrosion compound is most often used. Products can be of different sizes.

Anchor bolt sizes

There is a standard marking that indicates the size of the anchors. For example, if the product has the designation M10 12x100, then it is deciphered as follows:

M10 (sometimes indicated without a letter) indicates that the bolt thread diameter is 10 mm.
The number 12 is the diameter of the hole in mm that needs to be drilled to install anchor fastening.
100 is the length of the anchor bolt in mm.

For domestic purposes, most often use products ranging in size from M6 to M12 and up to 160 mm long. Longer bolts are used as specialized fasteners.

If we talk about the load that the anchor fastener can withstand, then even the smallest anchor 18 mm long can withstand about 800 kg. Typically, this parameter is determined based on the following characteristics of the concrete anchor:

leveling force - from 10.5 to 18.3 kN;
bending moment - from 5.2 to 25.7 Nm;
torque - from 10 to 40 Nm.

If the indicators of products do not exceed these values, then they will reliably serve for a long time.

The service life and reliability of the fasteners will also depend on how correctly the anchor bolts were installed in the foundation and any other surface.

Anchor installation technology

Let's take a closer look at how to fix the anchor bolt in concrete surface. To do this, follow these steps:

Calculate the length of the mounting bolt. To do this, evaluate the condition of the wall, if a finishing material is applied to it, then the fastener must have greater length, since the plaster layer is too fragile, it is not able to hold the bolt. Thus, if there is a layer on the wall finishing material 20 mm thick, then the length of the anchor fastener must be at least 70 mm.
Choose a drill that is 0.5 mm smaller than the bolt diameter (so that the sleeve enters the wall with force).
Mark the surface, taking into account the distance between the anchor bolts. At this stage, carefully measure everything, since in a miscalculation situation, remove installed fasteners it will be hard.
Drill with a hammer drill (you can use impact drill) hole in the wall or floor. It is best to use a special carbide tip for this. If you are drilling into a brick wall, it is best not to use impact equipment so as not to destroy the masonry.
Clean the prepared hole from dust and cement particles. To do this, first remove large concrete residues with a brush, and then get rid of smaller particles with a vacuum cleaner or compressed air canister.

Hammer the sleeve into the hole. Do not apply strong blows, otherwise you may damage the fastener. If it is not possible to hammer the product with a hammer, then it is necessary to slightly expand the hole by re-walking through it with a drill.
Screw the anchor stud into the sleeve and screw the nut onto it. When the nut reaches the sleeve, start tightening it with a special torque wrench (a screwdriver will not work). First, make 1-2 light turns, after that more effort will be required, as the sleeve will begin to enter the sleeve.
Pay attention to the packaging from the anchors, it should indicate maximum amount revolutions and the effort with which it is necessary to work with the key.
Do not overtighten the bolts as this will cause minimal surface damage, especially if you are using an aerated concrete anchor or other lightweight and porous concrete.

Sometimes it happens that the nut, during the installation process, “dunks” in the plaster. If you use a nut on a threaded stud, then you can safely continue to install the element until it completely “goes” into the wall. To fix the fasteners, it is enough just to use another nut, which can be screwed over the "gone" into the wall.

In custody

Today on sale there are fasteners for the most different materials, so you can easily choose an anchor for hollow floors, brick walls and a monolithic fundamental foundation. The main thing is to correctly calculate the depth to which you need to hammer the bolts and get rid of the interfering pieces of reinforcement located in the wall.