Attaching the Mauerlat to aerated concrete is quite simple. The primary role is played by careful preparation of all components: wooden beams, fasteners, reinforcing cage, reliable waterproofing. Let's take a look at the order of work.

Fastening the Mauerlat to aerated concrete

Before directly attaching the Mauerlat, you should prepare the base. Reinforcing belt- a prerequisite for arranging a roof, if the walls are made of aerated concrete or any similar material.

The reinforced concrete strapping belt prevents the punching of aerated concrete blocks and allows the dynamic and static forces coming from the roof to be evenly distributed completely over the wall area.

Arrangement of a reinforcing belt

The minimum size of the concrete tape is 200x150 m. It is attached from the inner surface of the wall.

Installation steps:

• formwork is being built around the perimeter of the house. The pediments must be processed;
• u-shaped blocks create a reinforced concrete belt;
• a frame is assembled from reinforcement with a thickness of 10 mm. The armature should protrude 4 cm;
• for rigid attachment of the Mauerltat to aerated concrete, threaded studs are installed with an interval of 1 m. Their diameter is 14mm;
• the blocks are filled with M-200 concrete;
• after a week, you can remove parts of the formwork and fasten the Mauerlat.

Important: at the stage of preparation for the start of work, builders are required to calculate the number of studs and the future distance between them. The points of attachment of the wooden structure to the rafters and the points of connection with the reinforcing belt should be located in different places. Check that the number of rafter legs and studs is the same.

Preparation of a wooden structure

The bars are processed before installation antiseptics preventing wood decay. A log or bar with a section of 100x100 mm or 150x150 mm is wrapped with a waterproofing material. For this purpose, a bitumen-polymer waterproofing material is suitable. Roofing material is not used.

Quality materials will create a solid structure. The tree must be free of knots and cracks. Humidity must comply with building codes.

If the developer uses "raw" wood, it should be possible to adjust the anchor nut.

This operation is performed once a year for 5 years. During this period, intense shrinkage of wet wood occurs. As the bars dry, tighten the nut less and less.

In this photo you can clearly see one of the ways of attaching the Mauerlat on the walls of aerated concrete.

How to properly attach the Mauerlat to aerated concrete?

An anchor with washer and nut is used. The shape of the anchors: T- and L-shaped. Thread: M12 or M14. According to international building codes, in earthquake-prone areas between adjacent anchors, the pitch should not exceed 1 - 1.2 m.

Mechanical type of fastener

Procedure:

• dowels are inserted into the prepared holes;
• screw in the fastener;
• the harpoon teeth are firmly pressed into the aerated concrete;
• the surface expands;
• the structure is securely fixed.

Great option installing a Mauerlat on aerated concrete has only one drawback - a high cost. 1 anchor and a special dowel with a harpoon cost more than 3 thousand rubles.

Another video on how to fix the Mauerlat to aerated concrete.

Installing Mauerlat

Another method is used to firmly fix the Mauerlat in aerated concrete walls. It will take chemical capsule... Its cost is much lower - 150 rubles. for a unit.

Reliable fixation of the structure is achieved due to the penetration of chemicals into the pores of the material. Additionally, the concrete surface receives heat and waterproofing.

The final stage

After installing the Mauerlat on aerated concrete, proceed to installation of the truss structure... There are two ways.

First option

• in the boards, they perform a wash down to 1/3 of the depth of the board;
• nails and metal corners will allow you to securely fasten the rafters;
• nails (2 pcs.) are hammered crosswise from the sides;
• an additional nail is driven in from above;
• the mounting angles finally secure the joint.

Second option

• in the rafter, the saw is not performed;
• a special support bar is hemmed from below, abutting against the Mauerlat;
• nails are driven in, as in the first option.

The support bar is 1 m long. The second option is suitable for rafters with a low height.

Fastening the tie bar can only be performed after accurate calculations and the procurement of high-quality materials. Buying timber of inadequate quality with high humidity can compromise the strength of the structure.

To fasten the Mauerlat to aerated concrete wall, use anchors with special dowels or a chemical installation method. Be sure to follow thermal insulation of the reinforcing belt made of extruded polystyrene foam.

Compliance with the requirements will allow you to securely fix the Mauerlat and create a solid rafter structure.

One of the most important nuances of the technology for building a house from aerated concrete is the Mauerlat mount. The characteristics of the blocks do not allow them to withstand high point loads; without taking constructive measures, the walls will simply collapse. Correctly performed fastening implies the laying of an armored belt, this stage is not recommended to be skipped. If it is impossible to organize it, the Mauerlat comes into contact directly with the wall and is fixed with wire, anchors, pins or dowels. The method is determined in advance; in the absence of experience, it is better to entrust this type of construction work to specialists.

Possible fastening methods

Depending on the type of strapping scheme, one of two options for attaching the Mauerlat to aerated concrete is selected: pouring a monolithic reinforced concrete belt around the entire perimeter of the building or placing fixing elements directly into masonry or blocks. The first method, in addition to ensuring maximum reliability, contributes to the redistribution of loads, levels the walls and protects them from deformations, including shrinkage. The presence of an armored belt is mandatory when conducting construction in areas with seismic activity, erecting houses from aerated concrete over one floor, using heavy roofing materials, and a complex roof shape.

The standard instructions for setting it up include the following steps:

• Preparatory: calculation of fasteners and selection of the interval between them. The main guideline is the layout of the rafters: with an equal number, the attachment points to the Mauerlat should not coincide with the twist points of the studs.
• Laying U-shaped blocks on top of the last row along the entire perimeter of the aerated concrete wall. They act as formwork, the recommended width is from 25 cm.
• Assembling a reinforcing frame from rods with a thickness of 10 mm. At this stage, it is planned to lay the pins for fixing the Mauerlat with an interval of no more than 1 m, strictly vertically, with a wire tied to the main rows. Particular attention is paid to the corners, in these areas the metal rods are bent to a length not less than the width of the belt. Similar actions are repeated along the entire perimeter of the bearing walls, including gables and partitions.
• Organization of an insulating layer made of compacted polystyrene foam. It is placed closer to the outer edge of the aerated concrete wall.
• Filling the inner cavity with concrete with a strength grade of at least M200, compaction, removal of excess and careful leveling of the top layer. Covering with polyethylene and standard moisture care during the first days.

You can start the next stage of tying the Mauerlat to the walls of aerated concrete in a week. All formwork structures are removed (they are used when pouring a monolithic reinforced concrete cushion around the entire perimeter and width, this design is typical for brickwork, but sometimes it is also used for gas silicate houses). Further, on top of the upper side in contact with the future Mauerlat, 2 layers of waterproofing are laid or coated, this stage cannot be skipped. Attachment points are marked on a well-dried wooden beam treated with antiseptics and fire retardants. The easiest way to do this is by attaching it to the armored belt over the studs and hitting with a sledgehammer, the holes are drilled according to the diameter of the rods (at least 14 mm). After that, it remains only to attach the Mauerlat to the aerated concrete wall and tighten it with nuts or washers.

The final stages of the work are difficult to complete on your own; the forces of at least 2 people will be required. In addition to the main walls, the armopoyas is mounted on any areas on which the roofing elements rest (for example, ridge posts or beds). In the absence of experience, it is worth watching video instructions on the topic "how to properly mount the Mauerlat". If it is necessary to eliminate errors that have arisen during the masonry process, it is better to contact specialists, at least for advice. Installation of rafters is possible only after all work on fixing the Mauerlat and checking the quality of the connections.

How is the Mauerlat attached to the wall in the absence of an armored belt?

It is not always possible to lay a monolithic tape with your own hands; in some cases, they resort to other methods of binding the timber. The easiest way is to lay 3-4 rows before the top of the steel wire between the blocks. Its length is selected taking into account the section of the Mauerlat: when folded in half, it should be enough for girth and twisting. The step depends on the distance between the truss structures. This option is often referred to when attaching a bar to the wall of a one-story house made of aerated concrete.

For light and small-sized buildings, the Mauerlat attachment for threaded rods made of galvanized or stainless steel is also suitable. They are mounted in the masonry 1-2 rows up to the upper edge, the minimum permissible depth of penetration of such products into the aerated concrete wall is 2 times the height of the block. The standard length of the studs is within 1 m, the diameter is from 8 to 24 mm. If necessary, the protruding sections are then cut off.

Fastening the Mauerlat bar with wooden dowels is possible both when laying an armored belt, and without it. They are treated with antiseptics and well-dried long plugs. They are mounted in a wall of aerated concrete closer to the upper edge and connected to the Mauerlat by means of staples. An alternative option is to lay them between the blocks, the number of pieces is not less than the number of rafters.

High reliability of fastening is provided by means of anchors: mechanical or chemical. In the first case, the method consists in screwing expanding dowels with a cross section of 12-14 mm into aerated concrete. The second is in the use of chemical anchors (capsule or in the form of a tube with compositions based on polymer resins). The minimum depth of the hole to be laid is 2 rows of masonry.

The main advantage of anchoring is the ability to fix the Mauerlat without complicated organizational measures in the process of laying gas blocks, it is quite easy to carry out it yourself. Nevertheless, the best results are observed with the most motionless hardware, that is, either laid simultaneously with the armopoyas, or fixed with the help of chemical compositions (in the latter case, welding is prohibited near the joints). The disadvantages of the method include the high cost: of all the technologies, fastening without an armored belt, anchoring will cost the most, and the more reliable it is, the higher the final costs will be.

Violations of the technology for attaching the Mauerlat during do-it-yourself work include:

• Lack of a waterproofing layer between the timber and the upper part of the wall. Preference is given to modern bitumen-polymer mastics, roofing material is a budget option, polyethylene film is not suitable for these purposes due to its low strength. The minimum number of waterproofing layers is 2.
• Planting Mauerlat, untreated with antiseptics (the contacting side remains unprotected) or using wet wood.
• Installation of anchors or studs at an angle, the connection is unreliable.
• Incorrectly selected reinforcement for the frame, no overlaps (the recommended minimum if it is necessary to extend the rods is 20 cm), close adhesion of the metal to the walls of aerated concrete (plastic supports are well suited to ensure the required 5 cm).

When using raw wood, the Mauerlat is fixed with a nut, the reliability of the fasteners is periodically checked, if necessary, they are tightened. This operation is carried out at least once a year for 4-5 years, until the end of the shrinkage processes. A completely dry and well-established timber practically does not need pulling up, it is inspected for preventive purposes.

Mauerlat is a special wooden, less often metal, structural element of the roof. It is necessary for even distribution of the roof pressure on the bearing supports, as well as for attaching the rafter frame to the aerated concrete wall. The reliability and durability of the entire structure depends on how accurate and strong the connection of the support will be.

Mauerlat should be correctly performed from a log or bar of at least 10x10 cm in size, treated with aseptic solutions, dried, without cracks and knots. If raw wood is used, then a prerequisite is the presence of an anchor adjusting nut, which subsequently must be tightened once a year for 5 consecutive years.

Rarely, it is allowed to use a channel or a beam for construction, but in this case, the rafters must also be metal, and the load on aerated concrete increases significantly, and reinforced fasteners are mainly needed, and the cost of such a project will not fit into every budgetary framework.

Mounting Guide

Initially, in order to evenly distribute the pressure on the building frame, a reinforced concrete strapping belt is erected to avoid pushing the aerated concrete. It is a concrete tape with dimensions of 20x15 cm, running along the entire perimeter of the aerated concrete wall.

A reinforcing belt is constructed according to the following scheme:

• Assembling the formwork along the top of the wall.
• Placement of U-shaped blocks inside the timber frame.
• Reinforcement with rods 10 mm.
• Installation of studs with a thread with a diameter of 14 mm, tied to the reinforcement cage, for reliable installation of the Mauerlat at a distance of 1 m from each other.
• Filling of molds with concrete M-200 mortar.

An important point in the technology for preparing fasteners is the calculation of the number of studs and their location. The number of rafter legs and fasteners must be the same. They are installed in such a way that they do not intersect with the connection points of the Mauerlat with the rafter system. The height is selected taking into account the size of the bar plus 4 cm.

After a week, the formwork is removed and the belt is ready for further work. Fasteners are embedded in the concrete, bonding to the reinforcement cage, providing the most reliable connection possible. A bar is superimposed on the studs, and the attachment points are imprinted on the latter by blows with a sledgehammer. Holes of the required diameter are drilled. Mauerlat fits snugly on fasteners and is fixed with washers and nuts.

There are options when, instead of a reinforcing belt, a so-called monolithic pillow is assembled. Its length, as a rule, is no more than 40 cm, and also contains a reinforcing cage with a tied anchor, poured with a concrete mixture. This feature is typical mainly for brick walls.

How to properly mount a Mauerlat without an armored belt?

If the construction of a reinforcing belt is almost impossible, then fastening to the wall of a one-story house made of aerated concrete is carried out without it.

There are several types of fasteners that it is quite possible to do with your own hands using:

• steel wire;
• anchors;
• studs;
• dowels.

Also, the subsequent fastening of the Mauerlat to aerated concrete can be carried out in two ways:

1. Mechanical - using bolts with M 12-14 thread and dowels with special harpoons. After screwing the elements into the base, the dowel parts expand in the cellular blocks of aerated concrete, firmly seizing inside. The negative side of this method is the high cost of hardware.

2. Chemical - special capsules with a polymer resin adhesive are used. This option is more affordable. The essence of the method lies in the fact that the chemical reagent, spreading in the pores of aerated concrete, firmly seizes the metal rod with the wall. In this case, the prepared hole should be 2-3 layers of masonry deep.

A chemical anchor provides a more durable connection than a mechanical one. Such ones are suitable for use in thin-walled structures, since they do not give expansion. Thus, additional hydro and thermal insulation of aerated concrete is provided. The only drawback is the impossibility of welding, if necessary, due to the destruction of the polymer resin under the influence of high temperatures.

The best option for fastening without an armored belt and the simplest is steel wire. In this case, the scheme of actions is as follows: 3-4 rows of blocks to the edge of the wall, it folds in half and is threaded under the bricks so that the ends come out freely. The length of the string is calculated with a margin so that it is enough to thread it through the drilled holes in the bar at a distance of 25-30 cm and twist it together as tightly as possible. The number of straps must match the number of rafters.

Anchoring is used in the absence of a reinforcing belt, but is most often used in conjunction with its construction. Then the installation technology will differ by replacing the concreted pins with the installation of anchors with harpoon dowels after the mortar has set or with a tie in a reinforcing cage.

Fastening with studs is performed when the structure and roof are small and the pressure on the support does not imply large loads. This process is performed independently using bolts or special metal L-shaped or T-shaped rods with a length of at least 1 m and a diameter of 8-24 mm. Such steel elements are embedded in the wall 2-3 rows of masonry to the upper edge.

Important: the deepening of the rod is carried out by an amount equal to two heights of the Mauerlat. After the masonry has solidified, a bar is put on and attracted by nuts to the aerated concrete.

Instructions for fixing the support with dowels implies the use of wooden plugs, pre-treated with moisture-proof agents. Such devices are mounted in a wall of aerated concrete or fixed under the timber itself. Mauerlat is fixed with metal staples. The number of fasteners should be equal to the number of rafters.

Tips and general instructions

1.creation of an additional axis of stiffness;

2. obstacle to deformation and violation of the geometry of the structure during seasonal shrinkage;

3. leveling the surface of the walls horizontally, for example, with uneven masonry;

4. Uniform distribution of the static load on the building frame.

When using studs and anchors, it is important to properly prepare the holes. Align a strict vertical for a secure fit. Especially for the chemical method of setting, where after drilling it is necessary to thoroughly clean and rinse the holes for a better setting of the reagent. In some cases, a cone-shaped expansion is created with a drill for the entry of a larger amount of adhesive mass and, accordingly, a stronger connection.

One of the important conditions: before fastening the wooden support, waterproofing made of bitumen-polymer material is laid. Roofing material in this case is used less often, like plastic wrap. The fact is that when materials come into contact with wood - concrete, an active process of decay of the wood component occurs. For this reason, it is recommended to lay the Mauerlat with modern waterproofing materials in two layers.

It is quite problematic to carry out work on the construction of the roofing system, reliable fastening of the structure to the aerated concrete wall, especially in the absence of proper experience in construction. Therefore, it is better to entrust such events, starting with the design of the future roof, to professional contractors.

| Reinforcement | How to fix a Mauerlat to aerated concrete without an armored belt?

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On the websites of manufacturers, there are conflicting statements regarding the need for an armored belt when erecting a building from aerated concrete blocks. Someone claims that they are quite capable of withstanding the expected load. Others, on the other hand, offer hedging.

However, all manufacturers and builders are confident that porous materials react negatively to point loading. Therefore, it is necessary to distribute it evenly. If for any reason the armopoyas device is not possible, it is necessary to use a Mauerlat.

This will extend the life of the building.

Mauerlat is most often made of the same material as the rafters - metal (channel, I-beam) or wood (timber)

What is Mauerlat

It is a special structure that is used to distribute the weight of the roof evenly over the walls. As a rule, it is made of wooden beams. It is to the Mauerlat that the rafters are attached to make the roof stable. The durability and reliability of the entire structure depends on the quality of installation.

Mauerlat can be metal, but only if steel rafters are used. However, such designs are rare, since the cost of a building increases significantly. In addition, fastening steel parts is much more difficult than wooden ones.

Mauerlat functions:

• even distribution of the weight of the roof over the walls;
• reliable fixation of the rafter system;
• protection and prevention of point load on aerated concrete blocks.

The minimum size of a bar used as a Mauerlat should be 10 * 10 cm. However, to ensure the best quality of adhesion, it is advisable to take a material of a larger cross-section. It is permissible to use a log, but it is necessary to cut off the side that will adjoin the aerated concrete.

The rafter legs at the points of support transfer the load to the Mauerlat, which, transforming and distributing, transfers it to the walls

Hardwood beams perform these functions best. In order for it to last longer, it must be treated with antiseptics and impregnations that prevent rotting and insect damage. The bars must completely and evenly cover the walls.

They are fastened together with nails or a straight lock. Due to the fact that the cross-section of the wooden material is less than the width of the gas block, the Mauerlat is placed on the inside of the walls. The distance to the outer edge must be at least 5 cm.

It is also permissible to lay bricks from the outside of the building.

There must be a waterproofing layer between the aerated concrete wall and the wooden Mauerlat.

Mauerlat mounting methods

Mauerlat can be attached directly to aerated concrete or using an armored belt. There are such ways to connect a wooden beam to a wall:

• using steel wire;
• using anchors;
• hairpins.

When using any of the listed methods, it is necessary to ensure that the fastening is of high quality and reliable. Also, during installation, structural shifts should be avoided.

How to fix the Mauerlat with steel wire

Steel wire is able to fix the Mauerlat rather reliably. It is woven into the masonry several rows up to the top of the wall. Enough 2-4 blocks in height.

The middle of the wire must be fixed, and its length should be enough not only to the top of the wall, but also in order to attract and fix the Mauerlat. The number of bundles is not limited.

But usually there are as many of them as rafter legs.

Anchoring

In this case, it is advisable to use an armored belt. Anchors allow you to securely fix the rafters, but create a point load, which is extremely undesirable for aerated concrete blocks.

Under its influence, the porous material is rapidly destroyed. Armopoyas allows not only to protect blocks from a point load, but also to increase the rigidity and strength of the entire structure.

Also, by pouring concrete, you can align the top of the walls horizontally. This will make it easier to install the rafters later.

Anchors are installed at the stage of pouring. They are fixed in a gutter, which will be filled with concrete mixture using a wire. Make sure that the anchors are level.

To do this, you can additionally pull on the cords. Anchors should be kept strictly upright. The number of fastening units is not regulated, but their number should be no less than the number of rafters.

When the concrete hardens, they will literally be walled up in it.

The fasteners increase the load-bearing characteristics and enhance the strength of the nodes, eliminating the displacement of the rafters under the influence of high loads

The bars are laid on the finished armopoyas with bolts. They knock on wooden material with a hammer or mallet. Anchor dents form on the timber. Holes must be drilled in these places. Care must be taken to ensure that they are even and do not deviate from the vertical. Then the timber is laid on concrete so that the anchors fall into the drilled holes, and secure with nuts and washers.

Small concrete cushions can replace a full-fledged armopoyas. They are installed in the places where the Mauerlat is attached to the wall. They also distribute the load more evenly and prevent the destruction of the gas blocks.

Attention! It is advisable to lay a layer of waterproofing between the reinforced concrete tape and the wooden beam. You can use both special mastics and simple roofing material.

With metal studs

Mounting the Mauerlat on metal studs can be implemented in 2 ways: by bricking them up with a wall or pouring concrete in an armored belt. In order not to be mistaken with the deepening of the fastener, you can use the following rule: it is inserted into the frame to a depth of 2 Mauerlats. If a beam of 10 * 10 cm is used, the hairpin should go 20 cm into the wall or armored belt.

Fasteners are mounted into the wall 1-2 rows before the end of the walls. It should be borne in mind that the length of the stud should be enough not only for blocks, but also for the Mauerlat. There should also be a small margin for tightening the nuts and washers.

In the latter case, the whole procedure is similar to the installation of anchors, only instead of bolts - studs.

In some cases, when erecting buildings from aerated concrete, you can not use an armopoyas, but then you need to equip a Mauerlat. Otherwise, the blocks will not withstand the point load and will quickly collapse.

Source: //pobetony.ru/armirovanie/gazobeton-bez-armopoyasa/

When arranging a pitched roof, the installation of a rafter system cannot be performed directly on the walls of a building. An additional element that absorbs the loads from the rafters and transfers them to the walls will be the Mauerlat. Usually this is a special bar that fits along the perimeter of the walls.

Since it takes up a serious load from the roof, it is very important to securely fix the Mauerlat to the wall. In the case of brick or concrete walls, everything is simple and clear.

But how is the Mauerlat fastening to aerated concrete carried out without an armored belt, because the gas block itself is rather loose and porous, therefore it cannot provide a strong fixation of the fastener? This is what we will talk about in our article.

An additional element that absorbs the loads from the rafters and transfers them to the walls will be the Mauerlat

Usually, the same material is used for the manufacture of the Mauerlat as for the rafter system. Most often it is made from a wooden bar. However, if the rafter system is made of metal, then this structural part can be made of a channel or I-beam.

Usually this element is made from the following materials:

• Wooden beams with a section of 100x100 mm, 150x150 mm or 200x300 mm. The timber is made of hardwood and undergoes mandatory antiseptic treatment. The product is laid along the perimeter on the walls of the structure. The joints are fixed with nails or a straight lock. In private construction, a wooden roof structure is most often used.
• Less commonly, rolled profiles are used for these purposes - a channel with a U-shaped section or an I-beam with an H-shaped section. The height of the profile is determined by calculation and can be in the range of 70-120 mm.

A timber or steel beam is attached to the walls. In this case, different fastening methods can be used. Further, the rafter legs rest on the Mauerlat. They exert a load on this element, which, in turn, evenly distributes it, transfers it to the walls of the building. In addition, this bar keeps the rafter system from shifting.

Important: since aerated concrete does not tolerate long-term point loads, it gradually collapses, it is recommended to erect a monolithic reinforced belt along the top of the walls before laying the Mauerlat.

However, there are ways of laying this structural element on aerated concrete walls without an armored belt. It is also worth remembering that the upper edge of the Mauerlat should be located at a height of at least 30-50 cm from the floor surface. This will ensure effective ventilation of the under-roof space and facilitate inspection and repair of roof structures.

Mounting methods

Fastening the Mauerlat to aerated concrete is much more difficult than to a brick wall

Fastening the Mauerlat to aerated concrete is much more difficult than to a brick wall. As a rule, this product is installed at a distance of 50 mm from the outer edge of the wall. The following fasteners can be used to mount the Mauerlat:

• steel wire;
• anchor fasteners embedded in the masonry;
• special chemical anchors;
• steel studs.

Important: Anchors are used to attach the support bar to a reinforced belt or brick walls.

After installing the timber, the rafter leg is attracted to the wall using a twist made of twisted metal wire with a diameter of 3 mm. To fix the wire, a steel shorty is mounted 6 cm below the bar.

Instead, the wire can be fixed to the floor slabs.

To tie the individual parts of the Mauerlat into a single structure, an oblique cut is used, followed by fastening with nails, screws or bolts. Steel plates and brackets are used to strengthen the corner parts of the structure.

Using wire to fasten the timber

If wire is used to fasten the Mauerlat, then this must be taken care of even at the stage of laying the walls

If wire is used to fasten the Mauerlat, then this must be taken care of even at the stage of laying the walls. The wire must be laid in the tub of the walls when performing the last few rows. At the same time, they adhere to the following sequence of actions:

1. During the laying of aerated concrete blocks, two or three rows before the end of the walls, a steel wire with a cross section of 6 mm is laid between the elements, which consists of several thinner wires twisted together.
2. In this case, the middle part of the fasteners is inserted into the masonry. Its ends should protrude from the walls. The length of these ends should be such that the wire can be freely wrapped around the timber to be laid.
3. The number of wires used should be equal to the number of rafters to be installed.

Fixation with studs

Fastening the Mauerlat to the aerated concrete wall with pins is allowed when installing light roofs on small houses

Fastening the Mauerlat to the aerated concrete wall with pins is allowed when installing light roofs on small houses. The materials used to form the roofing cake should be as light as possible and not transfer significant loads to the rest of the structural parts of the building.

This technique is the best suited in the case when it is impossible to equip the armopoyas. In such a situation, the beam itself will serve as a reinforcing belt. This method causes rather controversial reviews of experts, but in practice it has proven itself very well, providing high reliability and stability of the roof.

To fix the timber to aerated concrete, you will need the following elements:

• pins of the CPT-12 marking, called "dovetail";
• a wooden beam with a section of 20x30 cm (the dimensions of this element depend on the thickness of the outer walls).

We carry out the work in the following order:

1. We drill holes in the walls from the gas block with a step of 100-150 cm.
2. We insert pins into the holes and fix them with cement milk or non-shrinking mortar.
3. Next, you need to perform waterproofing. For this, two layers of roofing material are laid on the walls. At the location of the pins in the material, holes must be pierced to ensure its snug fit to the walls. Waterproofing will protect the timber from moisture saturation and subsequent rot that can come from the walls.
4. With the same step as the studs were installed, holes of a suitable diameter for the studs are drilled in the Mauerlat.
5. Then the bar is pushed onto the studs over the waterproofing, washers are installed and tightened with nuts.
6. After the installation of the bar, the ends, in which the individual fragments of the bar are joined, are pulled together with forged steel brackets.
7. Now you can start installing the rafter system.

If the pins are mounted in the armopoyas, then we work like this:

1. Before the start of filling the armopoyas, studs are placed in it with a step of no more than 100 cm.
2. They are attached with a knitting wire to the belt's reinforcement cage. Plastic ties can be used instead of wire to secure the studs.
3. The accuracy of the installation of the studs horizontally and vertically is checked.
4. Concrete is poured into the formwork of the armopoyas.
5. After it has solidified, the prepared bar is put on with holes on the protruding ends of the studs and attracted by nuts to the surface.

Chemical anchor

This product is also called a liquid dowel, injection mass or glued in anchor.

This product is also called a liquid dowel, injection mass or glued in anchor. In fact, this is a glue with high adhesion characteristics, which is made on the basis of a synthetic polymer resin. Thanks to the chemical anchor, it is possible to firmly fasten the metal rod and the base.

Important: unlike other fasteners, a liquid dowel does not create expansion stress in the material, which is especially dangerous for fragile aerated concrete at the edges of the walls.

Unlike mechanical anchors, the fixation of which is based on the use of frictional forces and expansion of a polymer dowel, a chemical anchor is fixed due to the fact that the glue penetrates into the pores of aerated concrete to a considerable depth and firmly fixes the rod in the wall.

The installation of a chemical anchor is carried out in the following sequence:

1. First, a hole is drilled along the anchor. However, the size should be slightly larger than that of a conventional anchor bolt.
2. With the help of a special brush or compressed air, dust, debris and metal crumbs are removed from the channel.
3. A special chemical adhesive is poured into the hole prepared in the wall.
4. After that, a steel rod is inserted there - a threaded rod M 12-14. Also, for these purposes, you can take a piece of reinforcement of a suitable diameter.
5. The adhesive composition gains the required strength in 20 minutes, provided that the ambient temperature is approximately 20 ° C.
6. After the chemical composition has solidified, the rod is securely fixed in the wall. Moreover, the fastening strength is much higher than that of the mechanical method.

Benefits of using a liquid dowel:

• The service life of such fasteners is more than 50 years.
• This fixing method can be used on the edge of walls without the fear of splitting.
• The fasteners have a fairly high chemical resistance.
• Mounting is allowed to be carried out on damp material, that is, installation can be carried out even in rainy weather.
• The installation of the Mauerlat and the arrangement of the roof can be carried out without using a reinforced belt, since the chemical anchor is much more firmly fixed in the fragile material than a mechanical dowel.
• This method is ideal for working with aerated concrete.
• The hole depth can be less than when installing a mechanical anchor, which must be buried 2-3 rows of masonry.

The only drawback of this method of fixation is that welding cannot be performed with a rod attached to a liquid dowel, since the polymer material is destroyed by heating, and the fixing strength decreases.

Mechanical anchor (anchor bolt)

This is a fairly common way of fixing timber to walls.

This is a fairly common way of fixing timber to walls. An anchor bolt consists of the following parts:

• outer spacer part;
• internal threaded rod.

Fixation occurs due to the fact that at the moment the nut is screwed onto the rod, the spacer structure is deformed in such a way that it reliably fixes the product in the hole drilled in the wall.

The installation of a mechanical anchor is performed in the following order:

1. A prepared timber is laid along the perimeter of the walls.
2. Further, along the entire length of this product, holes are drilled for installing anchor bolts. The step of the holes is 1 m. It is important to try to ensure that the anchors are installed in the corners of the building and at the junction of the two ends of the timber.
3. After that, with the help of a drill, holes are drilled in the walls through the holes prepared in the Mauerlat to a depth equal to the length of the anchor. In this case, it is not allowed to make the depth of the anchor insertion less than 2 or even 3 rows of masonry.
4. An anchor bolt is installed in the hole. For these purposes, it is better to take products with a length of at least 50 cm with M 12 or 14 threads.
5. After that, a washer is put on and the nut is screwed tightly. As a result, the steel or plastic dowel is unclenched so that it is firmly pressed into the material and fixes the bolt in the wall.

Source: //KakPostroitDomic.ru/stroitelstvo/bloki/kreplenie-mauerlata-k-gazobetonu.html

We attach the Mauerlat to gas blocks with and without armopoyas

Mauerlat is a part of the roof of any structure, which is a timber that is laid on top of the outer wall along the entire perimeter.

Its purpose is to evenly distribute the load from the roofing system to the entire surface of the load-bearing walls. It can be made of wood or metal. In the case of using a metal Mauerlat, finished products are taken: I-beam, channel, corner.

To perform its function, the Mauerlat must be securely fastened. There are two ways: fastening the Mauerlat to aerated concrete without an armored belt and with an armored belt.

Mauerlat mount with armopoyas

Using aerated concrete as the main material for laying walls, it is necessary to understand that it will not be able to withstand the load of the rafter system and the roof, therefore, the creation of an armored belt is mandatory.

The purpose and dimensions of the armopoyas

Armopoyas is a closed structure made of reinforced concrete, passing along the perimeter of the structure. The purpose of the armopoyas:

• prevention of deformation of load-bearing walls;
• giving additional rigidity to the aerated concrete structure;
• even distribution of the load on the surface of the walls.

Armopoyas is essentially the foundation for the roofing system. The dimensions of the armored belt depend on the width of the walls, for aerated concrete the width of the armored belt is about 25 cm, while the extreme row is laid out in U-shaped blocks, which will later act as a formwork for pouring concrete mortar.

Important! Armoias must be a continuous monolithic structure!

Prepared formwork before concreting

Armopoyas device technology:

1. Formwork construction around the perimeter of the building.
2. Creation of an armored belt from concrete blocks.
3. Assembling the frame from reinforcement.
4. Installation of studs for fastening.
5. Filling blocks with concrete.
6. Removing the formwork after the concrete has hardened.

After the armopoyas is ready, and the formwork is removed, you can proceed directly to the fastening of the Mauerlat.

How to fix the Mauerlat to aerated concrete

Its resistance to external influences, service life, noise and waterproofing characteristics and strength depend on its correct attachment to the load-bearing walls and the rafter system of the building.

Mauerlat must be made of the same material as the rafter system. If metal structures are used, then metal beams, channels, corners are used as a Mauerlat. For a wooden truss system, the Mauerlat will be made of wooden beams. The cross-section of the beams depends on the design load, the type of roof and the diameter of the rafter beams.

Before installing a wooden Mauerlat on aerated concrete blocks, it is necessary to treat the wooden beams with an antiseptic solution that protects the wood from insects and decay.

It is also advisable to wrap the bars with a layer of waterproofing material. To do this, you can use hydroisol, elastoizol, hydrostekloizol, stekloomast.

These materials will not weigh down the structure and will create a layer of additional moisture insulation.

Mauerlat is attached to aerated concrete walls using anchors, studs or metal wire. When laying the beams, it is necessary to connect them at the joints with metal staples.

Mounting scheme using studs (right) and brackets (left)

Next, you need to fasten the rafters to the Mauerlat. The connection takes place by cutting, cutting, cutting, but it should take no more than 25% of the timber. Fastening is done with self-tapping screws, bolts, corners, metal plates and polyurethane foam.

The main methods of fastening, starting with the preferred one:

• Fastening with pins. This type of fastening can be used in the construction of both simple one-story buildings and auxiliary structures: baths, summer kitchens, garages, outbuildings, small country houses. This stud method is the preferred method for most buildings.
• Fastening with chemical anchors. The joining of the beams to the aerated concrete is carried out with a special chemical adhesive: "liquid dowel", glued in anchor, etc. The composition is made on the basis of polymers and contains adhesives in the form of synthetic resins. A hole is made in the aerated concrete wall as for a regular anchor, which is filled with an adhesive, then a rod (reinforcement) is inserted into the prepared hole, on which the Mauerlat is then installed. The strength of such a structure is quite high, however, with a large Mauerlat perimeter, this method will be expensive.
• Fastening with steel wire. This method can be used if, at the stage of laying the walls, a metal wire was inserted between the aerated concrete blocks. Holes are made in the Mauerlat, where the wire is inserted and the strapping is performed. It is very important that the number of wire straps is no less than the number of rafters supported.

Fastening the Mauerlat to the aerated concrete wall without armopoyas

In accordance with SNiP, fastening without a preliminary arrangement of an armored belt is allowed only in exceptional cases. Aerated concrete is not a sufficiently strong material, and will not withstand a spacer snow load, as well as a dynamic wind load, therefore an armored belt is required!

//www..com/watch?v=x0BuKSN3LiE

In some cases, fastening the Mauerlat to the walls of aerated concrete blocks is possible without an armored belt device. This significantly reduces the cost and speeds up construction. However, this is possible if the following conditions are met:

• a light wooden beam with a cross section of no more than 20 cm is used as a basis;
• the timber will be reinforced with metal elements: locks, nails, metal profiles;
• snow and wind loads in your area are negligible;
• the construction of the rafter system excludes spacer loads.

Mauerlat is located at a distance of 0.5-1 cm from the outer edge of the bearing wall, and studs, chemical anchors or steel wire are used to fix it on aerated concrete.

Source: //KameDom.ru/gazobeton/kreplenie-mauerlata-bez-armopoyasa.html

Methods for attaching the Mauerlat to aerated concrete without an armored belt

Mauerlat is a structural element, an intermediate link between the walls and the roof, connecting them together. It takes on a high functional load. If it is planned to build a house from gas blocks, the question of how to fix the Mauerlat in the most practical and reliable way becomes relevant.

Mauerlat is most often made from the same material as the rafters, - metal (channel, I-beam) or wood (timber). The link is firmly fixed on the walls of the object, the rafters and the entire roof are attached to it, connecting the system into a single whole.

The rafter legs at the points of support transfer the load to the Mauerlat, which, converting and distributing, transfers it to the walls.

But, aerated concrete, as a brittle material, is not able to withstand high point loads and gradually collapses.

How to choose a material?

Works can be carried out with the participation of the specified materials:

• timber timber 15x15, 10x10, 20x30 cm, deciduous, antiseptic. The beam is evenly laid along the perimeter of the building, at the joints being fixed with a straight lock and large nails;
• channel - a metal profile with a U-shaped section, with a corrosion-resistant coating. I-beam - a standard profile with an H-shaped section.

In private housing construction, wooden beams are the main material used to work on the Mauerlat.

Calculation of parameters

The erection of the roof begins with laying out the Mauerlat, so the master must correctly calculate its dimensions.

Factors to be taken into account:

• the length of the perimeter and the area of ​​the object;
• type of roof;
• roofing material, rafters;
• climate conditions;
• the presence of an attic.

Variety of roof structure:

• flat;
• classic with 1-4 slopes;
• spherical;
• cruciform;
• tent;
• steeple;
• folded.

Most often, a standard gable roof is being erected. Therefore, it is advisable to present a calculation for this type of roof. Initially, you should measure the perimeter of the building and the length of the Mauerlat. Measurement is carried out along the top of the bar.

We calculate the volume of the Mauerlat:

• V = L * S, where S is the section of the timber, L is the perimeter of the object;
• M = R * V, where V is the previously calculated volume, R is the density of the material, M is the mass of the bar.

Working methods

The solution to the problem can be the use of these techniques:

• steel wire;
• anchors embedded in the wall structure;
• chemical anchors;
• metal studs.

Chemical anchor for aerated concrete

Liquid dowel, anchor, glued-in anchor, injection compound - all these are compositions with high adhesive properties based on synthetic polymer resin.

The base firmly bonds the base and the metal bar.

Unlike mechanical counterparts, the chemical anchor does not become a source of expansion stress, which is effective when working in areas near the edge of the structure.

In small houses, the Mauerlat can be connected with an oblique cut with fixation with nails, bolts or screws. The corners of the structure are reinforced with plates and brackets. Anchoring is provided to the wall

Anchors, which are considered mechanical, are fixed due to the work of the friction forces of the base and the expandable polymer dowel. In chemical - the synthetic mass penetrates deeply into the pores of the material and very firmly connects the aerated concrete and the core.

Sequencing:

• the prepared hole is filled with a chemical composition;
• a metal bar is inserted (you can use trimming reinforcement);
• after solidification of the mass, the fixing strength is higher than that of the mechanical method.

The service life of such an attachment is more than 50 years.... It is a durable element that is successfully used near the edges of a structure, without the risk of chipping off part of it. However, with a rod fixed with a chemical composition, it is not recommended to carry out welding work - the polymer will collapse under the influence of high temperatures and lose its strength characteristics.

Chemical anchors for aerated concrete make it possible to carry out work without an armored belt, since in fragile materials it holds much stronger than mechanical counterparts. Fasteners are practically irreplaceable when working with aerated concrete. For anchors, make more holes, at least 2-3 masonry layers deep.

The use of pins when attaching the Mauerlat to aerated concrete without an armored belt

Fixing with studs suitable for light roofs and small houses where serious loads are not expected.

Sometimes the method is implemented in exceptional cases when it is impossible to erect a reinforced belt and the Mauerlat itself from a bar implements all the functions of an armored belt.

Such a system causes ambiguous assessments of specialists, however, in world practice there was not a single case when the roof lost its stability.

For fixing you will need:

• hairpins "dovetail" CPT 12;
• timber 200x300 (actual parameters depend on the thickness of the wall).

Work technology:

• with a step of 1-1.5 m, a gas block is drilled;
• the hairpin is inserted and sealed with a non-shrinking mortar or cement milk;
• waterproofing is put on under the timber and on the pins, for which roofing material is successfully used, it cuts off aerated concrete well from wood;
• a Mauerlat is placed on top of the waterproofing and the washers are tightened with nuts through the thread;
• when the bar is mounted at the junction points, it is pulled together with forged brackets;
• rafters are installed on top of the system.

Very often, the owner has already installed gables, at that moment he wants to implement this stage of work. It is recommended to remove the gables and lay the Mauerlat around the perimeter of the wall. Then you should cut (sawing) the rafters in order to transfer the spacer from the leg to the beam. This connection is considered one of the most reliable.

The Mauerlat is attached to the armored belt using anchors. The fastening of the Mauerlat to a brick wall is implemented in a similar way.

The rafter is twisted to the wall made of 3 mm steel wire.

To do this, a steel shorty is inserted in an area 600 mm below the Mauerlat, or they work on floor slabs. When designing a complex roof, it is recommended to build an armored belt.

Aerated concrete and Mauerlat fastening with wire

The beginning of work is carried out at the stage of laying the walls. The wire is embedded in the structure shortly before the completion of its construction.

Sequencing:

• when laying wall structures, 2-3 rows to the top, a steel wire is threaded between the gas blocks, crowded in several layers;
• the ends of the wire should be released outward, in the middle should be laid under aerated concrete;
• the length is chosen so that the ends pass freely through the beam and can be twisted;
• the number of elements is selected according to the number of rafters.

Fastening the rafters to the Mauerlat

As noted above, the rafters can be fixed using various types of cuttings. Additional elements are metal rafter fasteners.

Fasteners that are used for this type of work:

• corners;
• wire ties;
• brackets WB;
• plates;
• corners of the Kyrgyz Republic;
• self-tapping screws;
• fasteners LK;
• perforated mounting tape TM;
• nails;
• studs, bolts complete with washers and nuts.

Brackets

The technique does not imply the arrangement of cutting, since there is no weakening of the structure. Brackets are made on the basis of steel with a zinc anti-corrosion coating... Fixation is carried out using anchor bolts, self-tapping screws, nails. The use of LK fasteners allows you to connect all elements of the system, without the use of anchors.

If a wet bar is used for the Mauerlat during work, it will inevitably shrink. Tighten the fasteners once a year for five years.

Corner KR and modifications

The fasteners increase the load-bearing characteristics and enhance the strength of the nodes, eliminating the displacement of the rafters under the influence of high loads. The corner is mounted with nails with special projections or self-tapping screws.

Mounting metal tape

The perforated tape strengthens the connection points without weakening the supporting structures, because it does not violate their integrity. For installation, nails and screws are used.

Fastening the Mauerlat to aerated concrete without an armored belt can provide a secure fit, fix the roof to the house and evenly distribute point loads. However, when working with piece materials, such as a foam block, a brick, a gas block, it is recommended to build an armopoyas, especially if it is planned to build a large house with a complex roof.

Mounting the Mauerlat to aerated concrete without an armored belt is shown in the video:

The question of how to fix the Mauerlat to aerated concrete without an armored belt is quite rare, because such a connection is rather nonsense in construction. To understand this, you need to figure out what the armopoyas is for, and what the Mauerlat is and its purpose.

Is aerated concrete?

But first of all, let us designate that the construction of houses from aerated concrete is at the peak of popularity, and the demand for this building material is growing. This means that many are faced with it when building their own houses. What you need to know about aerated concrete:

• belongs to the category of porous materials;
• good thermal insulation qualities;
• not the lowest moisture absorption;
• good bearing capacity;
• low strength.

It is the last characteristic that determines the possibility or impossibility of laying the Mauerlat on aerated concrete. Because the porous structure of the material does not allow it to be heavily loaded, especially pointwise.

As for the Mauerlat itself, this is a structure that is laid on the upper surfaces of the walls. In fact, it performs the functions of a strip foundation, evenly distributing the loads from the roof to the walls of the house. They are made mainly of wooden beams with a minimum section of 100x100 mm. It should be added that this roof element simplifies the fastening of the rafter system to the walls.

Armopoyas: design features

Now about the armopoyas. Its main task is to mount the Mauerlat. And if it is not in the structure of the house being erected, then certain problems arise related precisely to the fastening of the Mauerlat bar. There are several ways of fastening. They are excellently used by builders if houses are built from more durable materials: brick, stone, concrete blocks.

Mounting methods

So, we are familiar with the main elements, indicated by the question of how to attach the Mauerlat to aerated concrete. It remains to figure out the ways and understand one important idea. And the thought is that the proposed options for fasteners should be accepted with a lot of reservations. Because installing a Mauerlat on aerated concrete blocks without pouring a reinforcing belt is a rather dubious event.

And no matter how much you look for technologies, they all turn out to be, at least, of little use. And with each option, there is a huge number of contraindications. And although there is a lot of information on some portals that it is possible to lay the Mauerlat on aerated concrete and fix it, everyone unanimously assures that there are certain criteria that must be taken into account.

For example:

• you can use this method (without an armored belt) if the building being constructed is small in size;
• if the roof is a simple structure covered with light roofing materials;
• if hanging rafters are used in the construction of the rafter system, which are tightened together with reliable puffs;
• if layered rafter legs are installed, propped along the axis of the ridge beam.

By the way, the last option is best suited to this situation. Because part of the load from the roof will fall precisely on the supports under the ridge, this will reduce the load on the walls. And yet, before attaching the Mauerlat to aerated concrete, you need to think carefully about whether this process is worth carrying out without pouring the armored belt.

Option number 1

Fastening the Mauerlat to aerated concrete without an armored belt is best done using steel wire 4–5 mm in diameter, which is twisted into 2–4 layers. This method is often used when a Mauerlat bar is laid on brickwork. How this process is carried out. There are several strict requirements:

• the wire must be laid in the masonry of aerated concrete stones in the third or fourth row before the end of the masonry, that is, 3-4 rows of blocks must be laid above the wire;
• the length of the twist should be such that from both sides it reaches the laid Mauerlat, overlaps it and twists, creating a mount;
• the step of laying the wire twists is equal to the step of installing the rafter legs.

An example of fastening a Mauerlat bar with a wire

Before laying the Mauerlat without an armored belt on the walls of aerated concrete, the ends of the walls must be waterproofed. The easiest way is to spread the roofing material in two layers. Then the timber itself is laid. It must be aligned either on the outer surface of the wall, or on the inside. Horizontal alignment is mandatory. After that, the wire braids are tightened using a pry bar. The main thing is that the screed is strong and tight.

Example of Correctly Tightened Wire Braids Using a Pry Bar

It seems that this is the solution to the problem. But let's think sensibly. Strong tightening of gas silicate blocks can lead to cracking of the material, especially this will be seen during the operation of the roof, when wind loads will act on it. From them, the wire will work like a saw. But it is with this tool that blocks are trimmed when it is necessary to adjust them to the required dimensions.

That is, this option, with the seeming correct use, raises great doubts. And the more the Mauerlat is tightened with the wire, the faster it will cut the blocks.

Option number 2

Installation of a Mauerlat bar without an armored belt using anchors and dowels. For fastening, it is proposed to use an anchor with a length of at least 30 cm, preferably 50. They have the following appearance:

How this process is carried out:

1. After waterproofing their upper ends, a Mauerlat is laid on the walls.
2. Through each 1-1.2 m in it, as well as simultaneously in aerated concrete blocks, holes are made with a drill and a drill, the diameter of which is matched to the diameter of the dowel for the anchor.
3. Dowels are clogged.
4. Anchor bolts are screwed into them.

To attach the Mauerlat to aerated concrete without an armored belt, it is better to use an anchor with a diameter of at least 12 mm. And one more thing - pick up a washer of a larger diameter under the nut.

So, is this method really reliable? If this concerned a reinforcing belt made of concrete mortar, then there was no doubt. This is one hundred percent reliable mount. With aerated concrete, even if long anchors are used, there is no certainty that this type of fastening will be able to withstand the serious loads emanating from the roof structure. It is one thing to fix a shelf, cabinet or TV on aerated concrete, another thing when the loads from the roof are not one ton of different materials.

Option number 3

Fastening the Mauerlat to the aerated concrete wall using studs. Here, a hairpin with a diameter of at least 12 mm is used. It is laid across the wall in a masonry of blocks 2-3 blocks below the last row. It turns out that the threaded ends of the stud will stick out from the wall on both sides. Therefore, its length is chosen according to the width of the aerated concrete wall.

In this case, the Mauerlat is laid on aerated concrete in the same way as in previous cases. But the fastening is made by wire twisting. At the ends of the steel "pigtail" loops are made, which are put on the ends of the hairpin. That is:

• first one loop is put on, for example, on the outer end of the fastener;
• it is tightened with an M12 nut with a wide washer laid under it;
• the twisted wire is thrown over the wall, respectively, and the Mauerlat;
• a free loop at the opposite end is inserted into the free end of the hairpin;
• tightening with a nut and washer;
• a pry bar is required, which twists the twist over the Mauerlat bar, that is, the latter is pulled to the wall.

We must pay tribute to this method of attaching the Mauerlat to the wall erected from gas blocks. In many respects, it is more reliable. First, the wire does not come into contact with the aerated concrete material. This means that from its twisting there is no load that could cut it. Secondly, the hairpin is laid without violating the integrity of the blocks, which is very important for aerated concrete material. But even this option does not guarantee one hundred percent reliability of the fasteners.

Option number 4

Today we need to talk about innovative methods of fastening, because scientific and technological progress does not stand still and offers us new materials that increase the strength of the fastening. These are the so-called chemical anchors. In fact, this is all the same metal fixture that is inserted into the wall. But instead of a metal dowel, a two-component adhesive is poured into the hole made, which, in contact with air, quickly polymerizes, forming a strong connection. A steel anchor is inserted into it while the material has not yet become solid.

Today manufacturers offer two types of chemical dowels:

1. A ready-made two-component composition in a can, on which a pistol nozzle is put on for the convenience of feeding the mixture.
2. The composition is in a glass capsule, which must be inserted into the prepared hole. Then an anchor is inserted into it, which itself breaks the capsule, thus mixing the two components with each other and creating conditions for their contact with air.

The process of fixing the Mauerlat in this way exactly repeats the technology with conventional anchors and metal dowels, which was considered in option No. 2. Only instead of a steel dowel, either a capsule is inserted into the prepared hole, or the composition is poured from a can. The most important thing in the latter case is to insert the anchor immediately after filling the mounting hole with a two-component chemical compound.

It should be added that manufacturers of chemical anchors today offer varieties specifically for aerated concrete materials. It is them that must be used for fastening.

Now, with regard to the reliability of the fasteners. This is one of the most reliable options. But there is no information that someone has already used it. Therefore, one can only speculate. Although, in theory, everything should work.

Option number 5

All the same studs are used here, only they will be installed vertically and serve as anchors. Steel strips 5 mm thick, 50 mm wide, with a length equal to the width of the wall are welded to them. The device is installed at the stage of wall construction below the upper plane of the butt end by 2-3 blocks. Therefore, it is important to accurately determine the length of the stud. The reference point for the installation is a strip across the wall. It is better to use the option if the walls rise from two blocks, so the pins will be between the blocks, without violating their integrity.

Not a bad mounting option, one of the best, but on one condition - the mass of the roof should not be large. The load on the walls in this case is oblique, so the fasteners work in bending. The wider the strip in the fastening structure, the better.

Generalization on the topic

Several options for attaching the Mauerlat without filling the armopoyas have been proposed. It is difficult to say how the whole structure will behave, whether the fasteners will be reliable. Therefore, you should not take risks and avoid expenses. Fill the armopoyas and all your problems will be solved at once.