Anchors for brickwork: types of fasteners, installation nuances

Anchors for fastening objects and elements to a brick wall allow you to ensure the reliability and safety of the resulting connection. They are characterized by a sophisticated design and are easy to install. No special effort is required, just strict adherence to technology.

Anchor

What it is?

A brick anchor is a popular type of fixing element that can be used both during construction and during repair and restoration work. This product looks like a regular construction bolt, but has design features that allow you to reliably connect all brick elements, as well as fix parts of different weights on their surface.

The fixing element must be placed in a pre-prepared hole , and during the process of deepening, a special sleeve begins to increase, which creates the maximum level of adhesion between the object and the wall.

Manufacturers artificially increase the level of adhesion on anchors by applying special notches to them.

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Classifications

Anchors are classified according to service life:

By size, fasteners are divided into:

• Small (up to 5.5 cm long and up to 0.8 mm in diameter).
• Medium (up to 12 cm long and up to 1.2 cm in diameter).
• Large (up to 22 cm long and up to 2.4 cm in diameter).

According to the base material, anchors are distinguished:

• For dense concrete, brick or stone materials.
• For hollow brick and concrete foundations.
• For sheet materials - plasterboard, chipboard and fibreboard.

According to the method of fastening, the following are distinguished:

• Mechanical

Fastening is carried out due to the direct mechanical effect of the working part of the anchor on the base (wedging, friction, stop, material resistance, etc.).

• Chemical

Additionally, a gluing mechanism (force) is used; for fastening, adhesive based on polyester resins is used.

Mechanical anchors according to the technique of insertion into the base are divided into the following types:

• Wedges.
• Spacers.
• Hammers.
• Screw.

• Bushings.
• Expandable.
• Spring.

Spacers

Expansion anchors are a classic type of this type of fastener. They are a rod in the form of a bolt or pin with a cone-shaped end and an external element in the form of a sleeve, bushing or spring ring. The conical element, under the influence of the translational movement of the rod, expands the sleeve and secures the structure in the base.

Expanding

An expansion anchor consists of a threaded rod, which can be a bolt, stud or screw, and a sleeve consisting of 4 longitudinal petals with a spring ring and a cone nut on one side. When the rod rotates, the cone nut unclenches the sleeve petals, as a result of which the anchor expands and is secured in the base due to friction.

Wedge

Wedge fasteners are a long rod, at the end of which there is a deformation sleeve. After screwing the rod into the drilled hole, the sleeve petals expand. This type of fastener can withstand heavy loads.

Spring

Spring anchors are used when working with thin-walled bases, for example, when arranging the interior. Often, spring anchors are used as ceiling anchors and are equipped with a hook. The anchor is secured by unrolling the spring.

Screw

Screw anchors, or Molly bolts, are used when working with hollow structures with low load-bearing capacity - hollow brick, plasterboard, particleboard and fiberboard, etc. The Molly bolt is equipped with a special collet, which, when the bolt is tightened, opens and rests against material on the reverse side.

Bushing

Sleeve-type anchors consist of 3 or more elements, the main one of which is the collet - a spring split sleeve. The sleeve anchor design also includes a riving element and a threaded rod. When the anchor is twisted, the wedging element enters the collet and pushes it apart, thereby securing the fastener to the base.

Drivers

The basis of the driven anchor is a metal deformation sleeve with a conical hole, cuts in the body and internal threads. A firing pin is installed at the bottom of the sleeve. The sleeve is installed into the drilled hole manually or using an air gun. When the outer end of the sleeve is struck, it is deformed, after which a bolt or pin is screwed into the sleeve, necessary for fastening any object.

The principle of working with fasteners

One of the features of mounting an anchor is the location where it will be installed. Installation should be carried out clearly in the brick, and not in the gap of the masonry.

Also, when drilling, you cannot use a hammer drill. This can destroy the body of the brick, especially if it is hollow.

When drilling, you need to make sure that the hole is horizontal and does not deviate. The strength of the structure depends on this.

When driving, you should remember to use the anchor carefully so as not to damage the fastener itself or its parts. For example, carving.

Recommendations

The hollow brick anchor bolt has successfully replaced the nails, bolts, screws and self-tapping screws that were previously used for fastening. This method, which allows you to hang something or connect elements with hollow brick masonry, is considered the most reliable today. True, to obtain durable fasteners, it is recommended to follow some rules.

When installing a slotted brick anchor, do not use a hammer drill. Its impact will create cracks in the fragile material, and a new hole will have to be made.

It is prohibited to select seam sections of masonry as a point for drilling and mounting an anchor. Cement and sand do not guarantee the required strength, and if there is a significant load on the fasteners, the anchor system will soon fall out.

When hammering in the anchor structure, place a piece of wood under the hammer so as not to damage the threaded area. Before you start screwing, clean the inside of the sleeve to avoid damaging the threads.

Purchase anchor fastening systems that have appropriate quality certificates.

Requirements common to all anchors

It is pointless to list the nuances of using all types of anchor fasteners that exist today - each manufacturer provides detailed recommendations for their hardware, in accordance with their design and purpose. But there are a number of requirements common to all products that are intended for installation in brick walls:

• Holes for mounting any types of anchors are drilled exclusively in the body of the brick. Drilling masonry joints is prohibited, since they are most often not able to hold fasteners. In addition, the destruction of part of the seam leads to a weakening of the load-bearing capacity of the wall in this place.
• Any anchor is installed strictly perpendicular to the brick structure. Even a slight slope is a gross violation of construction technology and leads to weakening of the fastening.
• When calculating the hole depth and drilling, the thickness of the finishing layer - plaster or putty - must be taken into account. It must be taken into account that the anchor is fixed in the thickness of the wall, and not in its cladding. Errors in the depth of fasteners can lead to the most unpleasant consequences.
• Before installing the anchor, the hole in the brick must be cleaned of dust and debris that got into it during drilling. This can be done using a special brush, an industrial vacuum cleaner or improvised means.

These requirements are mandatory, since the quality of installation of anchor fasteners directly depends on their compliance.

General installation rules

Before fixing the anchor bolt in a brick wall, it is recommended to clarify the specifics of using the types of hardware selected for the work. It will not be possible to find out everything, since each manufacturer provides detailed information only for its own fastening system, taking into account its design features and purpose. But there are general rules for anchoring brickwork that must be followed:

• The installation hole for any system is made directly in the stone. It is forbidden to drill inter-masonry seams, because in most cases they do not hold the fastener. In addition, partial destruction of the suture section reduces the load-bearing capabilities of the wall in this location;
• The anchor bolt is fastened at right angles to the brick wall. The slightest deviation refers to a serious violation of technology and leads to weakening;
• When calculating the depth of the hole and performing drilling, the thickness of the finishing layer of plaster or putty must be taken into account. Remember that the anchor is fixed directly in the wall and not in the facing material. A mistake made in choosing the depth of the fastening will result in dire consequences;
• The hole drilled for installation must be cleaned of dust and remnants of wall material. To do this, use a brush, vacuum cleaner or improvised means.

The quality of anchoring depends on compliance with the above rules.

Types of fastening systems

A chemical dowel or anchor is most often used for installation in hollow bricks. The peculiarity of this type of fastener is its high resistance to the negative effects of alkalis and water.

Each type of fastener is used in a specific situation.

To attach various objects to walls made of brick and aerated concrete, several types of anchors are used. The difference between fasteners is their size and technical parameters. Each type of anchor corresponds to specific tasks. When choosing an anchor system, it is important to take into account the specifics of the bond and the brick from which the wall is made. For example, clay brick is stronger than silicate brick, and the advantages of porous building materials include all the qualities of faucet brick and gas block. The cladding can be clinker stone masonry, and a certain type of anchor must be selected for it.

Driven type

Anchor systems of this type are considered the most common and easiest to install. They are used to fix a profile pipe or any structure on walls made of solid and slotted bricks. The peculiarity of the driven anchor is that after it is installed in the wall, the spacer part is activated, providing adhesion. Only after this, additional threaded fasteners are inserted into the sleeve using a nut, which is removed at the end of the work. Instead, a corner, hook or ring can be used.

Wedge view

Such fasteners are also suitable for fixing metal channels.

This type of masonry anchor has a special element that is wedged during installation. By expanding inside the wall, this fastener holds heavy objects. With its help, you can even fix a metal channel to the wall. Often these anchor systems have countersunk screws. It is better to use wedge anchors if you need to install through the fixed object.

MSA type fastener

The anchors are made of brass and have a special notch that improves the level of adhesion to the building material. The inner sleeve has a conical shape with a narrowing towards the base. This structure allows the anchor to expand and the device to be fixed in the wall as the bolt is screwed in. Such fasteners are used for hanging light equipment.

Chemical fasteners

This anchor is suitable for hollow and solid bricks, but when working with slotted building materials, chemical anchors are indispensable. After the necessary calculations have been made, an ampoule of polyester resin is installed in the prepared hole. Then drilling is carried out using a pin, which provides a physical and chemical method of fastening. It takes time for the compound used to harden. For slotted bricks, at least 20 minutes.

To reliably connect the components of multilayer structures with air channels and cladding, a flexible ligament anchor with wavy bends is used. Calculating the required quantity is simple: per 1 m² there are 4-5 pieces of flexible anchor connections.

Double spacer system

Such fasteners are usually used for hollow-type bricks.

An anchor or dowel for hollow bricks has a spacer sleeve in 2 places at once. This guarantees a secure fit. This type of fastener is also suitable for solid building materials, but its most popular use is for slotted bricks. If there are 2 spacers, there is a high probability that at least one of them will hit a solid part. Shows itself well in terms of breaking out.

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Types of anchors used for working with brick structures

When working with bricks, mechanical and chemical type anchors are used. The most popular are hardware that uses mechanical methods of fixation in the wall. For brick walls, the most popular types of products are:

• Drive-in anchors, ideal for use with solid sand-lime bricks or cinder blocks;
• Wedge anchors used for installation of façade curtain systems and external glazing on brick walls of various types;
• Double-spacer, designed for mounting critical massive structures and objects to walls made of solid brick;
• MSA anchor systems for fixing lightweight parts to brick structures of any type;
• Anchor bolts with hexagonal head. Suitable for any walls made of piece elements.

Manufacturers also produce other types of hardware products, which are not very widely distributed and are used mainly for special types of work related to the installation of equipment or finishing elements.

Rules for installing anchor systems

Make a hole for the anchor using a hammer drill in drilling mode

With the advent of household hammer drills, the installation of fastening systems in the walls of buildings has become significantly simplified. The older generation remembers the pain it took to install the anchor.

Using a special metal tube (bolt), under the blows of a hammer, a hole was slowly made in the brickwork. Now such an operation takes minutes.

To correctly and safely install anchors in a brick wall, you must adhere to the following rules:

• Whenever possible, the hammer drill is used in drilling mode. Brick is a rather fragile material and can simply crack and collapse under impact load. The resulting hole will not fulfill its purpose.
• The temptation is to make the work easier for themselves, they drill holes in the cement joints of the masonry. However, this position of the anchors can lead to dire consequences. Under heavy loads, the cement crumbles and hanging objects can simply fall to the floor.
• When drilling, you need to strictly control the horizontal position of the drill. At the slightest downward inclination of the cavity, there is a risk of the anchor falling out under the influence of an increased pull-out load.
• When driving the supports with a hammer, place a spacer (wooden plank) under the anchor. This allows you to protect the stud threads from damage.
• Before installing the anchor system, you need to check the cleanliness of the surfaces of the sleeve and rod. For more information about working with an anchor bolt, watch this video:

By following these fairly simple rules, you will always be confident in the strength and reliability of the fastening of hanging furniture and other items.

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How to anchor a safe to a concrete floor

In the current realities, the question increasingly arises of how and how to securely secure a safe in an apartment, because, firstly, not all merchants offer such a service, and secondly, many prefer to do the installation themselves. Securing a steel vault is usually done to prevent unauthorized removal. This can be done most reliably using anchor bolts on a cement-sand or concrete screed.

Regulatory conditions for the installation of safes are regulated by GOST R 50862-2005. For fastening, an anchor wedge fastening to the floor is used, which can withstand from 500 to 3,000 kg of tensile load. The optimal bolt length is 100-300 mm, and the diameter is from 8 to 20 mm. During installation, the following conditions must be taken into account:

• The thickness of the ceiling or subfloor must be at least 150 mm.
• If it is necessary to drill holes in places not provided for by the design, it should be taken into account that the tightness of a fireproof or backfill safe cannot be broken.
• Independent violation of the integrity of the case may lead to termination of the certificate.

How is the installation carried out?

To install fasteners for hollow bricks, it is recommended to adhere to the following rules:

• The diameter of the prepared hole must be equal to the diameter of the fastening system.
• Before installing the sleeve into the wall, you need to clear the hole in the brick from dust and debris.
• Tightening the inner bolt should ensure that the inside of the anchor is fully expanded. This guarantees the reliability of the fastener.
• The anchor system is inserted only into the body of the brick, and not into the layer of cement mortar.
• The brick wall must be strong and without damage. Cracks weaken connections.

Anchor systems are used as part of external and internal work. For fixation, you need a preliminary calculation of the number of ties, the shear strength of the masonry and the level of resistance, the peculiarities of the fastening principle relative to the type of brick, etc. Sometimes it becomes necessary to use additional devices, for example, a corner for an anchor system.

How to properly install an anchor in brickwork

Anchor products used for fastening various objects on brick structures are designed in such a way that their installation does not cause any difficulties. It is performed in the following sequence.

• A hole is drilled in the structure to be fastened. Its diameter must correspond to the diameter of the anchor product.
• After thoroughly cleaning the hole, an anchor bolt is driven, inserted or screwed into the brick.
• When tightening the bolt head, it is necessary to achieve maximum expansion of the spacer sleeve, which will be evidenced by reliable fixation of the fastener in the brickwork.

Anchor installation principle

When choosing a place to drill a hole, you should pay attention to the fact that it does not fall on the gap between the bricks filled with cement mortar. This hole must be made only in the body of the brick itself.

It is also necessary to pay attention to the condition of the material from which the building structure is made, because cracks in it can significantly weaken the joint being formed.

Overview of species

The high level of demand for fixing elements and their wide range of applications have forced manufacturers to develop a wide range of parts that differ in size, design and technical characteristics. These features have a direct impact on the specific operation of the elements, and some parts are designed to solve a narrow range of tasks of increased complexity. Expansion anchors for brick walls and masonry can be used for solid, hollow and hollow building materials , as well as sand-lime and facing bricks. In order to more carefully study all types, it is better to consider each separately.

Double-spacer

A new version of fixing devices is double-spacer anchor elements, which have a spacer sleeve that opens in two directions.

This feature makes it possible to enhance the fixing effect not only in conventional masonry, but also in products made from hollow material.

Drivers

The most common fastener used for working with solid bricks. The principle of operation of a drive-in anchor is the opening of a spacer element in a pre-prepared hole, followed by screwing the threaded part into the drive-in part.

Wedge

Wedge fasteners are special fixing elements that are equipped with a special wedging part.

A distinctive characteristic is reliable fixation after full expansion in the prepared hole, the presence of screws and a recessed head.

M.S.A.

MSA type products are advanced fixing devices that are equipped with special brass sleeves. A design feature is the presence of longitudinal cuts that divide the surface of the product into separate expanding elements.

To maximize expansion of the spacer sleeve, the internal part is cylindrical.

Hex Bolts

Hex head anchor bolts are a fixing element that uses a classic bolt instead of a rod and nut. A distinctive feature is the fastening of the element in the brick cavity at the moment of tightening the nut, which leads to deformation of the sleeve.

Manufacturers also produce models that can be tightened with a screwdriver.

Chemical

Anchor products, the operating principle of which is based on a chemical reaction, are a popular and popular device for working with hollow and porous bricks. The difference is that the drilled hole is filled with adhesive after placing the anchor inside it. Advantages: high fixation level. The disadvantage is that it is impossible to use the structure until the glue has completely hardened. This period of time depends on the components and features of the composition; it must be indicated by the manufacturer in the instructions.

The glue capsule can be located either inside the product or in a separate bottle.

Main types of fasteners for brick walls

Anchors specifically designed for installation in brick building structures differ not only in their size, but also in their design and technical characteristics. Accordingly, the scope of application of such fasteners also differs, each variety of which is designed to solve specific installation problems. That is why, in order to ensure high reliability of fastening objects that are fixed on a brick surface, you should approach the choice of anchor bolts very responsibly.

Specialists working in the field of modern construction and renovation are often faced with the need to perform installation work on masonry structures. This problem is solved using several types of anchor bolts:

1. driving;
2. wedge type;
3. MSA type;
4. double-spacer;
5. fasteners, the upper part of which is equipped with a ring instead of a standard hex head;
6. working on the principle of chemical fastening.

Each of the above types of fasteners used to perform installation work on brick walls deserves to be discussed in more detail.

Drive-in type anchor fasteners

Such anchor bolts are the simplest type of fasteners of this type. Drive-in anchors are used for fastening to building structures made of solid brick. The principle of operation of such an anchor bolt is that after installation in a previously prepared and thoroughly cleaned hole in the wall, a spacer element is activated in it, which ensures reliable fixation of the fastener. After the driving part of the bolt is securely fixed in the brick, the threaded element is screwed into it.

Parameters and installation of a drive-in anchor

Wedge type anchor

The design of such an anchor bolt, as is clear from its name, has a special element that is wedged during installation. Expanding in the holes made in the brickwork, the wedge element reliably fixes the fasteners to the building structure. Most often, fasteners of this type are equipped with screws that have a recessed type head.

Characteristics of wedge type anchor bolts

MSA Type Anchor Fasteners

A special feature of this type of anchor bolts is the presence of a brass sleeve in their design. On the side of such a sleeve there are longitudinal slots that divide it into separate petals that expand during installation of the fastening element. To ensure significant expansion of the spacer sleeve during the process of screwing a threaded element into it, the internal hole in it is made in the shape of a cone rather than a cylinder.

Dimensions and parameters of MSA anchors

Chemical anchor bolts

These anchor bolts, fixed in a pre-prepared hole using a special adhesive composition, are the most reliable type of fastener for walls made of hollow bricks and porous materials. The adhesive composition used for chemical fasteners fills the internal cavities in the hollow and porous material, thereby securely fixing the bolt in the hole.

Chemical anchor in the wall

The rules for installing such fasteners are quite simple and are as follows: a hole is drilled in the brickwork or in a structure made of porous material, which must be thoroughly cleaned. A capsule with glue is placed in the hole (or the adhesive composition is pumped into it from a special tube), and then a bolt is inserted.

Naturally, for the adhesive composition used for installing chemical anchors to completely harden, a certain time is required, which depends both on the composition of the adhesive and on the ambient temperature. Manufacturers producing such anchors for bricks must indicate in their recommendations the period required for the adhesive to completely harden.

The injection mass of the chemical anchor can be located inside the capsule or in a separate tube

Ring Anchor Fasteners

The ring, which is present in the design of such anchor bolts instead of a standard hexagonal head, is intended for more convenient installation of various objects: lamps and chandeliers, cable routes, communication elements for various purposes, etc. Manufacturers of such fasteners produce them with rings of different sizes so that consumers can choose bolt depending on the weight and dimensions of the objects fixed with it. A variation of such an anchor bolt is a fastener with a hook instead of a ring, which allows you to remove a fixed object from it if the need arises.

Characteristics of anchor bolts with rings

Double spacer anchor products

Anchor bolts of this type, in the design of which there is a spacer sleeve that expands during installation not in one, but in two places at once, allow reliable fastening, including in hollow bricks. The high reliability of using such products is explained by the fact that at least one of its spacer elements will be located not on the hollow part of the brickwork, but on the solid part of its internal structure.

Parameters of double-spacer anchors (click to enlarge)

The above review lists only the most popular types of anchor products used for fastening in brick. In fact, modern industry also produces other anchors that can be used for bricks and form reliable connections with such building materials. Such fasteners differ not only in their design features and technical characteristics, but also in cost, which must be taken into account when choosing them.

Chemical anchor, fastening with glue

Fastenings based on filling the inside of a metal rod embedded in the wall are used to provide strong connections in stone, brick, sandstone, shell rock, limestone, and cellular concrete. Such connections involve the use of chemical anchors, for example the popular all-season type moment fastener CF900. A metal insert, which is a reinforcement rod, a threaded stud or a sleeve with a thread on the inner surface, goes deep into a prepared hole, the diameter of which exceeds the anchor parameter by 2 mm. After this, a capsule with glue based on polyester, polyurethane or acrylic resinous substances, a hardener and filler in the form of sand is inserted into the sleeve. Then the glass cylinder is destroyed and a metal rod is inserted into it and the binder is waited for setting.

Types of anchors for hollow bricks

1. Wedge (hairpin). This model is most often used for through fastening of heavy elements, such as sports equipment, advertising and information boards, lighting fixtures, etc. The anchor bolt is driven into a pre-drilled hole, the nut is tightened, the spacer ring opens and, as a result, the metal is securely fixed in the wall. They are made, as a rule, from high-quality galvanized steel, since the fastening is subject to heavy loads. Sometimes there are products made of stainless steel and non-ferrous metals, but the former are highly expensive, and the latter are designed for light loads.

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1. Driven. It consists of a spacer brass sleeve-cylinder, a fastening element - a bolt of any shape (ring, hook) - and a fixing nut. All parts are screwed together, and then the nut is removed. This is the most common, popular and easy to install type of anchorage.
2. Folding spring with hairpin. Used in materials with sufficiently sized voids. A folded spring anchor is inserted into the drilled hole, which opens into the void, securely held there by its petals. For final fixation, simply tighten the nut with a wrench. Such anchors are characterized by the fact that they do not require precise drilling depth and pre-cleaning of the hole.
3. Double bursting. This model includes a double-spacer pin and a sleeve, notched in the middle and at the end. This structure allows you to securely secure the necessary things on hollow walls and at the same time reduce the risk of tearing out several times.
4. Chemical or adhesive. Chemical anchors for hollow bricks have appeared relatively recently. According to builders, hollow material “gets along” best with anchors of this particular type.

   This metal threaded stud is fixed using a nylon sleeve and a special chemical composition. The composition hardens, after which the load-bearing capacity of the finished joint will be an order of magnitude higher than traditional mechanical. Chemical anchors are widely used in the installation of canopies, railings, balconies, and bridges. This type of fastening is resistant to water, alkali and other adverse factors. Its service life reaches 50 years.

Materials

Due to the fact that anchor rods on monolithic cladding are used in cases where it is impossible to tie with a load-bearing wall, manufacturers use basalt plastic and fiberglass for the manufacture of fixing elements. These materials not only have a high level of strength, but are also able to withstand a wide temperature range , and also have a low thermal conductivity coefficient, which significantly reduces the likelihood of the formation of cold islands. During operation, fiberglass products behave best.

Experts do not recommend purchasing steel anchors, which during operation are capable of accumulating condensate, which will inevitably provoke corrosion processes.

What types of anchors are there - classification of fasteners

All types of anchor bolts are divided into two categories:

• products with mechanical fixation. Reliable fastening occurs due to friction and expansion forces;
• chemical fastening with adhesive composition. It allows for fastening in fragile walls made of cellular grades of concrete.

Let us dwell in more detail on mechanical clamps, which are divided into two categories according to the following characteristics:

• design option;
• area of ​​product use.

Let's consider the classification features in each group.

Fastening

To create reliable buildings, experts recommend strengthening structures with special fixing elements - anchors. Anchor fixing parts are simple products, the installation and fastening of which should not cause difficulties even for novice builders. Despite the simplicity of the procedure, before fastening the part, it is necessary to make a pull-out calculation and follow all the recommendations of specialists in order to securely fasten it.

Basic Rules

To obtain maximum results, experienced craftsmen recommend taking into account a number of rules and technological features during the installation of anchors. The size of the drilled hole must strictly correspond to the diameter of the fastener. Do not install small anchors in large holes.

It is strictly forbidden to install anchors at the joints between bricks that are filled with cement mortar. It is also undesirable to choose weak areas with a large number of cracks and chips for work.

To protect the thread from deformation, experts recommend avoiding direct contact of the hammer with the metal and using wooden or rubber spacers.

Before starting work, it is necessary to accurately mark the work area and determine the location of the anchor. It is strictly forbidden to drill recesses close to each other, since the structure of the brick is porous and fragile, which will certainly provoke the destruction of the structure. When carrying out insulation work, clamps can be purchased separately.

If necessary, you can carry out not only horizontal reinforcement, but also vertical reinforcement - the main thing is to avoid the appearance of even a minimal bevel.

When choosing a fixing device, experts recommend adhering to the following standards:

• the length of the sleeve should not be less than 6 cm;
• the optimal level of insertion of the rod into the wall is 9 cm;
• the recommended number of anchors per 1 m2 is 4 pcs.;
• areas near openings and at joints must be reinforced.

Incorrect selection of the size, type and material of the fixing element can provoke weakening of the structure, as well as the appearance of cracks and faults on the walls.

Special brushes, a vacuum cleaner, or any convenient means at hand will help remove debris and dust from the recess.

Technology

In order to obtain a reliable and durable design, experts recommend following the following sequence of actions:

• carrying out marking work and accurately determining the location of clamps;
• drilling a hole of the required diameter in the selected work area;
• complete cleaning of the recess from dust and foreign debris;
• installation of the fixing part;
• Fully tighten the bolt head.

An important point is that the depth of the hole should not take into account the thickness of the finishing layer, which will not allow creating the maximum level of fixation.

You can learn how to use a chemical anchor from the video below.

Foundation installation

Anchor bolts are installed in the foundation in the same way. For example, to install steel columns to the foundation. These are the first anchor bolts that are used in the construction of a house; they can withstand enormous loads because they are part of the load-bearing foundation of the structure.

Foundation anchor bolts can withstand very heavy loads

Anchors with a hexagonal head differ from others in their strength. A hexagonal metal sheet is placed on the wall or floor, and anchor bolts are screwed or driven into the drilled holes at the corners of its edges. This design is considered very reliable and can withstand any application, even lifting cars if installed on the floor. The hexagonal structure itself has unique features to withstand high pressures and not deform due to its stiffening ribs. Hexagonal parts are often used in various technical areas due to their features.

Hex head anchors are more durable

The wedge anchor has a very good load-bearing capacity due to friction forces; its anchor expands inside the material, as if clinging to the wall, it does not allow the pressure to pull itself out. Wedge anchors are also divided into different types; it is worth remembering that the stronger the adhesion due to frictional forces, the better its load-bearing capacity, but at the same time, the base material must be stronger, otherwise the fixation will simply destroy it. This type is not recommended for use on walls with low strength, such as aerated concrete.

Such anchors are best used for strong walls.

The bolt type also has a bolt and nut that adjusts the armature to control locking. But unlike the wedge type, the bolt type has an anchor along almost the entire length of the bolt, which dissipates the pressure along the entire length of the recess. Thus, the destruction of the wall is minimal and this type can be used not only in concrete and high-strength walls, but also in more fragile materials, which makes it quite popular. But they also have their weaknesses. For example, if compared with wedge ones, then at the same pressures, for bolted ones you need to use a larger axle diameter, which will lead to new problems. It is necessary to use a drill with a larger diameter, and accordingly, make a larger hole in the wall, which will entail greater costs, and can also weaken the strength of the wall material if it is not strong enough. Such anchors come in both single-spacer and double-spacer types, which allows them to be held more firmly in the base and disperse internal stress. This property increases the load-bearing capacity with less destruction of the wall.

Using a bolt and nut you can adjust the anchor

The threaded impact anchor is strictly used for durable materials, the pulse vibrations will destroy the fragile wall before the installation is completed. It has a thread, and inside there is a cone that expands from the inside. It is easy to install, you just need to drill a hole, hammer it and wedge it. It is easy to select a bolt of any length; it is installed flush with the wall and does not require subsequent cutting, which speeds up the installation process and is also convenient to use. It is typically used to install pipes on ceilings, ducts and ducts.

Such anchors are used only for durable surfaces

The installation tools are the most common and can be found in everyone’s garage, because installing anchor bolts does not require any special tools. An ordinary drill or hammer drill (depending on the material of the wall on which the installation is being carried out), or a hammer is sufficient. If impact types of fastenings are used - a wrench, to fix the fastening of the anchor base. Using these simple tools, any type of installation of absolutely any anchor fasteners is possible. The installation itself is carried out depending on the type of fastening and, of course, the experience of the master, because improper installation can lead to various destructive side effects, for example, destruction of the base of the surface. You should also choose the right match between the type of fastening and the surface material, because not every surface is able to withstand strong point pressure and not every fastener is designed for heavy loads, as discussed above. Before deciding to purchase, you should definitely consult with an experienced builder or installer, and you can also consult with salespeople from construction companies and stores; such consultation will not be superfluous when making a decision.

To install the anchor you only need a drill

Correct and reliable fastening is one of the main conditions during construction to create a durable house. Anchors occupy first place among other similar devices for installing heavy structures on various types of surfaces. Thanks to their unique structure and the mechanics of internal load distribution, they are able to withstand very heavy structures, as far as the strength of the material allows. And even for fragile surfaces, thanks to additional overlay metal sheets and through installation, they can withstand incredible load forces, which will allow the installation, even at home, of heavy equipment or specialized installations, not to mention the construction of the structure itself with the help of the reliability and versatility of modern anchor fastenings.

Fastening is a mandatory procedure during repair and construction

Thus, if you approach this issue responsibly, having become familiar with the types of fasteners and their physical properties, they will never break out, even after many years. Even if dismantling is necessary, it will not be possible to remove them from the wall without destruction, and if the wall has high strength, then this will not be easy to do, the anchors are installed once, without the possibility of reinstallation, but here everyone chooses what is more important, durability and reliability or the possibility of dislocating the anchors bolts

Anchor system design

The device consists of a rod and a spacer sleeve

The principle of operation of the system is the same as that of dowels. The system consists of two parts: a support rod (bolt) and a spacer sleeve. Anchors for brick walls are made in various lengths and diameters, that is, a certain type of fastener is selected for each load value.

To install supports in brickwork, you need the following tool:

• perforator;
• brick drills;
• hammer;
• spanners;
• brush for cleaning holes.

Securing the roof base with anchor bolts

If a new house project is being implemented, a mauerlat can be secured with anchor bolts, which evenly distributes the load-bearing load on the wall structure.

The only drawback is the high cost of the anchors. To connect a wooden Mauerlat to a wall, you must follow the following instructions:

1. Starting to arrange the frame, you need to fill the armored belt around the perimeter. It consists of concrete and reinforced elements. The presence of this design helps to increase the rigidity of the building.
2. At the stage of filling the belt, it is equipped with anchor bolts.
3. When the solution has completely hardened, the Mauerlat is applied to the fasteners and holes are made.
4. After this, the beam is placed on the anchors. To increase the fixation strength, washers are screwed over the bolts.

The principle of operation of anchors - how do they cope with loads?

The principle of operation lies in their technology and special prefabricated structure, due to which the load has a completely different character. The fact is that when installed, the anchor bolt already expands in the wall; it cannot be pulled back out with any effort, like a nail, dowel or screw.

In this case, the load is distributed over a small surface area into which the bolt was installed, and not at one point, as with standard fixations. To enhance its ability, a metal sheet is additionally mounted with it, which takes up most of the load and distributes it across the entire plane of the sheet, and the larger the sheet area, the more load the bolt can withstand.

Anchor and dowel - what's the difference?

The operating principle of these two fasteners is the same. Both anchors and dowels work to expand the wall material. The difference is that you can screw self-tapping screws into the dowel and drive nails into them. And the anchor always consists of at least two parts - a spacer part and a non-spacer part, which is screwed into the first. When the screw is screwed in, the anchor's petals open and, like an anchor at the bottom, clings to the wall material and is firmly held inside the wall. Since the anchor has a minimum of 2 elements, it is often called an anchor system.

Both fasteners are used for hanging fairly heavy objects: cornices, chandeliers, wall cabinets, sports walls. But the anchor system can withstand loads greater than dowel fasteners - more than 100 kg. Therefore, anchors are used for installing curtain facades and fastening heavy metal structures to the outer walls of buildings.

Anchors: their effectiveness and types

The effectiveness of anchor bolts speaks for itself, this is the latest modern device that is quickly gaining popularity due to its ease of use and practicality. At the moment, there are no analogues for them that could compare in terms of economy and physical characteristics. Taking the physical laws of load distribution along a plane as a basis, experts came to a very effective solution and created this device.

Anchors come in different types, have approximately the same properties and functions, each has a fundamental difference. They are divided into the following types and subtypes:

• Mechanical: – mortgage; – spacer; – driving; – wedge; – a bolt with a ring or hook; – frame; – hairpin; – façade; – ceiling; – spring.
• Chemical: – monolithic fasteners; – for external and internal work; – for fastening in loose and thin-walled substrates; – resistant to vibrations; – long-serving;
• Plastic.
• Ground.
• For foundation construction.
• Height adjustable.

Reviews about anchors for bricks

Purchasing hardware from KREP-COMP allows you to get high-quality products at an affordable price. The product is delivered in original packaging and accompanied by the necessary documents. When accepting the object, the customer does not have any questions regarding fasteners.

Any connections can be formed on the basis of KREP-COMP anchors. The nodes are distinguished by excellent rigidity and functionality. They have compact dimensions and do not require complex maintenance.

I ordered fasteners to renovate a cottage. I am completely satisfied with the received product. The anchors are easy to install and hold the load well. The fasteners have a protective coating and can be used outdoors.

Certain difficulties arose when choosing anchors. KREP-COMP consultants helped in their decision. They talked about the range of products and recommended products that meet our requirements. The store left a positive impression.

What are anchor bolts for masonry

A brick anchor is a universal fastener that is equally successfully used both in the field of capital construction and when performing simple repair and improvement work on buildings and premises for various purposes. With the help of such fasteners, which are a bolt of a special design, objects and elements of even significant weight can be securely fixed on the surface of a brick wall. Such anchor bolts, in particular, can be used to secure furniture and interior items, lamps and chandeliers, suspended ceilings, wall-mounted facades and much more.

The design features of this type of bolt and the principle by which it operates are contained in its name: anchor in German means “anchor”. The element that ensures reliable adhesion of such fasteners to the inner walls of a pre-drilled hole in the brick is a special sleeve. Placed in a hole in the wall, when the head of the anchor bolt is twisted, it begins to increase in diameter, pushing out the inner walls of the hole and coming into reliable engagement with them.

In order to make the adhesion of the anchor bolt sleeve to the walls of the hole in the brick even more reliable, a special notch is applied to the side parts of its outer surface.

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Types of anchor bolts

According to their service life, anchors are divided into temporary and permanent . Each of these types is divided depending on the method of fastening, the material with which contact occurs, size, and material of manufacture.

By purpose

Since the scope of application of anchors is quite wide, they are divided according to the base material:

• For solid, durable materials. This can be an anchor bolt for concrete, brick, stone.
• For cellular brittle blocks.

There are also devices designed for fastening structures to plasterboard, wood, fiberboard and particle boards.

Dimensions

Depending on the length and diameter, the fastening anchor bolts are:

• small: with a maximum length of up to 5.5 cm and a diameter of up to 0.8 mm;
• medium: up to 12 cm long and up to 12 mm in diameter;
• large: no more than 22 cm long and 24 mm in diameter.

Fastening methods

Anchor bolts can be fastened in two ways: mechanical and chemical. With mechanical ones , fixation occurs due to the direct impact of the working part of the bolt on the base.

• Wedges. They look like a long rod, at the end of which a deforming sleeve is placed. After screwing in, the sleeve petals expand, due to which the anchor can withstand enormous loads.
• Spacers. A standard type of anchor bolt, made in the form of a rod with a cone-shaped end. Under the influence of translational movements, the rod expands the sleeve, creating a reliable fixing mount.

Chemical - an adhesive composition of polyester resins is additionally used. Such anchors cannot be reused and are characterized by maximum reliability of fastening.

Design

Mechanical anchor bolts are divided into several types.

• With nut . The simplest type of spacer fastener, which has a cone-shaped tip, sleeve, nut and four cutouts. The nut serves as a lock with which the bolt fits into the seat. As soon as the rod begins to be screwed in, the nut is turned clockwise. As a result, the sleeve expands, tightly securing the structure.
• With a hook . The head of such a bolt looks like a hook. Fasteners are used for heavy structures with fixation to dense materials (stone, concrete, brick). The principle of operation is no different from standard anchors - when screwed in, the fixing nut is deformed and secured in the seat.

How to Attach an Anchor Bolt: A Reliable Anchor for Any Application

Despite its resistance to loads, installation is very simple, in three stages:

– drill a hole in the wall with a drill or hammer drill; – install a bolt in the hole; – spread out the anchor base.

This installation guarantees reliable use for any purpose and load. The anchor base will cope perfectly with any type of application.

Installation of anchors

Install fastenings to a brick wall in several stages:

1. Use a hammer drill or a drill with a concrete drill to drill holes in a brick wall.
2. Use a brush to clean the holes, freeing the cavity from debris.
3. The anchor is driven in with a hammer until the support washer completely adheres to the wall.
4. The nut is tightened with a wrench or socket.

Varieties

Anchors differ not only in size. There are design features of technical parameters. Anchor products for brick walls are divided according to their intended use. A specific type of hardware is used for certain installation work.

Important! To ensure reliable fixation of an object in a brick wall, it is recommended to take a responsible approach to the choice of anchor products.

Driven type

Allows you to secure critically heavy weights. Made from high-strength material or carbon steel. It is treated with a specialized anti-corrosion coating, which ensures an increase in service life. The product is manufactured in one piece, which increases the reliability of the fasteners. A popular type of hardware is the collet anchor.

Drivers

The anchor is driven into the brick with a hammer. Its working part becomes wedged. This way the element is securely fixed in the wall. Then the bolt or stud is screwed in.

Wedge type

The scope of application is identical to the hammer type analogue. The method of installation in a stressed and unstressed concrete plane is allowed. Refers to reliable fastening elements. Capable of withstanding high loads. Used in dry rooms.

Made from various types of steel. Differs in specific execution. On one side there is a stud with a metric thread, onto which a nut is screwed. On the other hand, there is a spacer system in the form of a coupling with an internal shank.

Wedge

MSA type

Brass products, the outer side of which is characterized by the presence of a special sleeve with a large notch. The design allows you to increase the density of fixation of fasteners in the wall cavity. The permissible intra-sleeve cross-section is in the range of 8-10 mm.

Chemical principle

The external design is a cylindrical tube. Inside there are two ingredients - organic and inorganic. Reacting with each other, they harden and provide the required degree of strength.

Chemical

Important! Chemical-type fastening structures are in high demand because their use is allowed in places with high humidity, in porous substrates. Even in such extreme conditions, they are able to hold the elements together.

The name of the hardware was given in view of the chemical principle of operation - a chemical reaction. Has no smell. It is an environmentally friendly product. Does not harm the environment and the human body.

The negative aspects of using the product include the high price and different setting times of the composition. The latter depends on the variety of adhesive mixtures.

With ring

The peculiarity of the product – the presence of a ring – ensures its scope of application. It is convenient to install suspended structures on wall and ceiling surfaces. In construction it is used for securing scaffolding. Allowed to be used for bricks with a dense internal structure - only solid ones. In porous and hollow materials, fasteners lose their effectiveness.

With ring

Double-spacer

Additionally, a spacer sleeve is provided that opens simultaneously in two places. The first spacer element does not come into contact with the solid masonry surface. The reliability of fixing the product in the wall increases. The sample shows good results in the tensile test, therefore it is used in difficult operating conditions.

Double-spacer

Anchors for hollow foundations

The instructions given in the previous chapter were focused on anchoring the walls themselves during their construction and brick cladding. Now we will look at which brickwork anchor can be used when you need to hang a cabinet, lamp, CCTV camera, etc. on the wall.

Types of fasteners

There are no problems with solid brick walls: they simply drill holes in them and install dowel-nails. But for walls built from slotted bricks or porous ceramic blocks, this technology is not suitable. Due to the hollow structure of the base, a regular dowel will not hold - for this you need anchors for hollow bricks.

And this is what manufacturers offer to our attention today:

Product typeUseful information

Wedge type anchor, with nut

This anchor bolt is used for bricks - and not only solid ones, but also hollow ones. And in general, it is suitable for almost any base, except for plasterboard sheathing. The wedge anchor has the highest degree of reliability, and therefore is used in cases where something very heavy needs to be hung on the wall. It is also suitable for through fastenings.

This is a steel rod with a diameter of 6 to 24 mm, of various lengths, with a movable coupling and a cone-shaped shank. When the nut is tightened, the cone opens and the anchor is firmly fixed at the base.

They are made of galvanized steel, the price starts from 3.5 rubles. a piece.

Drive-in anchor, with expansion sleeve

This type of anchor is perfect for all types of hollow foundations. It consists of a spacer, usually a brass cylinder sleeve, a fastening element (bolt), and a fixing nut. First, they are screwed together, and then the nut is removed. Moreover, the bolt in such an anchor can have any shape: a hook, a ring, an angle, which allows you to use such anchors in a variety of situations - for example, hanging a water heater on the wall.

The cost depends on the size and material of manufacture, and varies from 4 to 50 rubles. a piece.

Two-component chemical anchor

These anchors provide the best grip on the wall and can be used in a wide variety of situations. Among them there are also options for both monolithic and hollow bases. The chemical anchor is held in the brickwork by a nylon sleeve, which increases in volume after the introduction of a special two-component composition. A long threaded rod is installed into it, and when the filling polymerizes, an almost monolithic connection is obtained.

The cost of a tube of adhesive composition, with a hardener in a separate package, is about 1,350 rubles. Studs with nuts cost about 45 rubles and are purchased separately.

What anchors for foundations with reduced load-bearing capacity have in common is the presence of sleeves with which they adhere to the wall. The point is that when installing the sleeve into a drilled hole, it expands and is firmly fixed, and then the anchor itself is inserted into it.

It can be anything - a pin, a screw, a long screw, or a smooth rod. But in everyday life, all these options are simply called: anchor bolts for bricks.

Rules for fastening anchors

Before proceeding with installation, it is worth clarifying a few important points. Firstly, it is worth understanding what kind of brick the masonry is made of. Depending on this, you choose the type of anchor. Secondly, after this it is also worth taking into account the functional significance of the fastener (what exactly it will hold and what weight and size). After this, you can proceed to the next stages of installation.

The rules for installing anchors depend on the above types of fasteners.

In the case of flood anchors, you need:

• a hole needs to be drilled. It corresponds to the size (length and diameter) of the fastener. The hole must be thoroughly cleaned of dust and brick shavings;
• install the anchor in the hole. The wedge located inside the anchor is driven in. It is driven to the very end of the hole;
• The attached part is attracted.

Attaching the canopy to a brick wall

Attaching the canopy to the wall is carried out taking into account certain rules. Since brick cannot be called a material with high strength, it is better to make holes with a drill. Even weak hammer drills can deform the masonry and lead to wall crumbling. Special drills are available in stores that create high-quality holes and do not destroy the fragile structure.

When starting drilling, you need to be careful and not rush. Next, you need to determine the height at which the canopy will be fixed, attach it to the wall and mark the attachment points. After this, you can proceed to screwing in the anchor bolts.

When making holes, it is important to avoid areas with cement joints. They are not strong enough, so when hanging heavy elements they will begin to crack, causing an irreversible deformation process.

Guided by the listed recommendations, you can correctly fasten the anchor elements and achieve better quality of fixation of hanging objects.

Installation features

In the practice of modern construction, anchors are in demand. They provide a reliable way to install equipment and fix massive objects and structures on the walls and ceilings of a building. It is important to choose the right hardware for the job.

Fastenings for solid bricks will not provide the necessary adhesion to hollow material. Therefore, it is important to first determine the base raw materials from which the enclosing structure was erected.

Sequence of work:

• The plane is marked. The work is done with the utmost care. Hollow ceramic bricks are fragile. If you make two holes with a small interval between them, the material will most likely be deformed.
• The hole in the brick is made with a specialized drill. The cross-section of the anchor element and the depth of its placement are taken into account. The perpendicularity of the hole produced is a guarantee of high-quality work.
• After creating the hole, it is cleaned of dust and debris. Depth accuracy is checked.
• When inserting the anchor, make sure that the gap between it and the wall is minimal. If it turns out that the product is loose, it is better to take larger hardware. It should be selected according to the diameter of the resulting hole.

Important! Installing a hammer-type product is the same painstaking process as installing a spacer analogue. If you apply excessive force when hammering, not only the fastener itself will be damaged, but also the wall.

Features of application

The installation process is carried out in several stages. The main ones:

1. Preparing the hole.
2. Train room.
3. Installation of the anchor in the uncured polymer mass.
4. Tightening the nut.

Each of these stages is associated with its own characteristics.

For installation you will need:

• chemical anchor;
• injection gun;
• stud or threaded fittings;
• hammer drill or drill;
• Boer;
• torque wrench;
• metal brush;
• manual or industrial vacuum cleaner;
• Remedies.

Once you have the tools, you can begin installing the chemical anchor.

Preparing the hole

When working with brickwork, it is important to avoid splits and cracks in the brick. This requires refraining from using the hammer function on the equipment and drilling perpendicular to the plane

To successfully install a chemical anchor for hollow bricks, a hole that is 2 millimeters larger than the diameter of the stud is required. It is necessary to apply a mark on the drill in advance corresponding to the length of the anchor, or use a depth limiter.

To improve adhesion, you need to thoroughly clean the hole from dust and crumbs. This is done using a metal brush and a hand pump, with which the hole is blown several times until there are no visible dust residues.

Introducing the composition

The polymer mass is injected into the hole using an injection gun. If the mixture has a uniform gray color, then it can be used. It often happens that initially it is not possible to achieve high-quality mixing - such a mixture should not be used. To use the gun, you need to place the nozzle in the drilled cavity and fill it with the composition. After each dose of glue placed in the hole, you need to remove the tool a little until more than 65% of the cavity volume is filled.

The procedure for placing a chemical dowel into a hollow brick is characterized by a number of features. They are due to the fact that the presence of a large number of voids does not allow the formation of a natural hole. To achieve the goal, a special plastic sleeve is inserted and filled with glue. When a pin is immersed in a hollow brick, part of the chemical composition escapes through the mesh walls of the sleeve into the cavity. This promotes greater grip.

There are also special ampoules. They are placed in the hole, the composition is mixed using a pin. The second option is more suitable for piece work, when there is no need to buy cartridges with a chemical composition.

Installing a metal anchor

We place the metal structure in the hole using rotational movements

It is important to distribute the solution evenly. To do this, it is recommended to periodically pull the fastener towards you and only then tighten it.

While the glue dries, you can correct the position of the anchor.

Tighten the nut

After waiting for the polymer mass to completely harden, you can proceed to installing equipment and structures. The manufacturer's instructions indicate the maximum force applied to tighten the nut. It is recommended to use a torque wrench to control the applied forces.

Chemical anchors are suitable for fasteners made of steel. Due to its positive properties, the anchor can be installed in high humidity or even under water. When used correctly, it is possible to avoid destruction of the brick, which allows installation at the very edge of the surface.

Chemical anchor is a new direction in construction, thanks to which complex work is simplified. The supply market is becoming more extensive, a larger number of anchors with various new fastener characteristics are appearing.

Concealed bolts

There are two types of hidden fastening bolts: German and ours. The German Keil bolt is expensive in euros. It is counterfeited by local manufacturers, calling it a Keil collet-type hidden fastening bolt.

A real bolt is sold by invoice without the word “type”. Expensive German bolts are counterfeited in Kazan, at a dental equipment factory. The quality is inferior, but the price tag pleases.

For dense and lighter facing materials, there are bolts of a different fastening principle. They are produced in Russia and do not require a special machine.