The cost of installing reinforcement depends on the type of reinforcement and material specifications. There are standard solutions for strengthening a standard size opening in panel house. In most such cases, the openings are reinforced with a corner around the perimeter.
To calculate the cost of non-standard reinforcements or wide openings, we need to familiarize ourselves with the project, which you can send by email indicating the address of the object or WhatsApp 89257715642, 89261524271.
Cheap openings with reinforcement and fixing defects
If you don't have a project and you are going to make an opening without permission or you do not need documents from us, we can offer you to make an opening reinforced with a channel or corner for a standard solution.
Below is the cheapest cost of ready-made openings with reinforcement channel without documents from us.
An opening in a panel house with standard channel reinforcement, including metal and its delivery. The connection nodes have a corner and a strip. Anchors and plate (heels) for the channel.
| Concrete thickness walls |
Reinforcement material | Price in rubles |
| 14 cm | 16 channel, sheet 10, angle 75, fittings 12 | 28000 ! |
| 16 - 18 cm | 18-20 channel, sheet 10, angle 75, fittings 12 | 36000-38000 |
| 19 - 20 cm | 22 channel, sheet 10, angle 75, fittings 12 | 45000 |
| 21 - 22 cm | 24 channel, sheet 10, angle 75, fittings 12 | 52000 |
| 50 cm typical opening in two room apartment V block houses tower type house series I-209a | reinforcement with horizontal jumper 16 channel, 50-80 strip, M16 stud | 55000 |
Separate removal of remaining construction waste: 4,000 rubles for removing garbage into a container (openings in the walls are 14-18 cm thick), if there is no container + 7,000 rubles for a container within the Moscow Ring Road. Completion time is one or two working days (depending on the thickness of the wall and breaks for noisy work). Metal to the size for reinforcement is prepared at the work site.
Strengthening openings in brick walls
DIFFERENT TYPES OF REINFORCEMENT FOR OPENINGS AND BEARING WALLS
Complete dismantling of the load-bearing wall followed by box
strengthening according to the project.
Preparing metal to strengthen openings on the first floor. Metal is always prepared to size on site.
Installation of combined amplification load-bearing walls.
Completed combined reinforcement of the opening on the top floor in a 2-room apartment after partial dismantling of the load-bearing walls and dismantling of the reinforced concrete lintel according to the MNIITEP project (type A).
Completed combined reinforcement of the opening on the top floor in a 2-room apartment after shortening the load-bearing walls and dismantling the reinforced concrete lintel according to the MNIITEP project (View B from the kitchen).
Complex reinforcement of wide openings after dismantling walls
27 channel on bolts according to the project.
Box reinforcement of openings with channels.
When expanding the opening to a wide size, the project provided for reinforcement with 20 channels under the ceiling with additional piping with 140 corners.
Before cutting a wide opening, the opening is first reinforced with a tie rod.
Finished opening reinforced with tie rods
according to the project.
Standard opening with double-row reinforcement with tie rod
according to the project.
Strengthening a wide opening in a load-bearing wall as prescribed by the Moscow Housing Inspectorate
with partial sealing of the opening.
An opening with reinforcement for a niche and a doorway with reinforcement according to the project
in the carrier brick wall.
Complex reinforcement of an opening in a 20 cm wall according to the project
developer SU-155 (Mosaic).
Combining two apartments, complex combined reinforcement
opening according to the project.
The upper unit of the combined reinforcement of the opening.
Bottom knot combined reinforcement of the opening.
Combined reinforcement of an opening from a channel and a corner in a monolithic wall.
Framing the opening with metal according to the project.
Strengthening a wide opening in a panel house on the top floor
according to the project.
Strengthening an opening from a 140 corner in a 24 cm monolithic wall
according to the project.
Combined opening reinforcement. Before cutting a wide opening, preliminary reinforcement is placed with a channel under the floor slab of the upper floor ( standard project MOSPROEKT).
The opening is ready, only after installation of the main reinforcement is the preliminary reinforcement dismantled.
Fixing the marriage. According to the project, strengthening the previously made opening and tying the column 125 with a corner.
Strengthening an opening in a brick wall and tying a column.
Extension monolithic ceiling with reinforcement from 27 channels
according to the project.
Partial dismantling of the ceiling and installation of reinforcement,
24 channel is placed under the walls.
Finished opening with reinforcement in the ceiling according to the project.
And such projects for strengthening openings are not uncommon. The channel is welded to the reinforcement in the wall.
To open the reinforcement, you have to knock down the edges with a jackhammer.
Strengthening the opening in monolith 22 according to the project
Reinforcement of openings by welding of exposed reinforcement according to the project.
Reinforcing the wide opening in concrete wall according to the project.
Strengthening the opening, the project involves “recessing” the channel into the wall and tying it with studs.
ATTENTION! We do not have other sites, but on many Runet sites, the topics of which are: diamond cutting, apartment redevelopment, strengthening of openings and walls, drilling holes- photographs of works made by the company Slom Service are posted, as well as information from the website website.
To make premises more functional and aesthetically attractive, their owners strive to build various options extensions; move interior partitions; pierce, widen, or change the shape of window or door openings. Such actions qualify as redevelopment of the premises' space.
This is a labor-intensive and rather troublesome task - at least for those who want to do such work with their own hands. Even if the building is private property, such actions must be approved by the appropriate authority.
Permits for redevelopment are issued by the housing inspection, and what is required for this, and how doorways are arranged and strengthened, we will tell you with the help of a video in this article.
Imagine that the transfer doorway, even if it is produced in non-load bearing interior partition, is also a redevelopment. But apartment owners cannot always correctly determine whether a particular wall is truly non-load-bearing.
As a result, the price of such actions turns out to be too high: even if unauthorized intervention did not lead to destruction, it may be impossible to sell the apartment or house afterwards. Therefore, even if you just need to move the door, do everything properly.
How to find out if a wall is load-bearing
For both an apartment and a private residential building, the owner has a floor plan, which is issued by the BTI when the building is put into operation. Most often, load-bearing walls are shown thicker than partitions. But this is not always the case, and a lot depends on the type of house.
- In houses that we used to call “Khrushchev”, especially brick ones, the partitions are always non-load-bearing. But in multi-apartment panel buildings built according to modern projects, the loads from the floors are distributed across almost all partitions. There is nothing surprising about this; construction technologies simply change over time, and this must be taken into account.
- External and inter-apartment walls are always load-bearing. As for the interior wall, the easiest way to determine whether it is load-bearing is by its thickness. The enclosing structure is 8-10 cm thick and clearly does not bear any loads, and you can safely make a new opening in it by filling the old one with bricks.
Note! The only thing the apartment owner needs to do in this case is to notify the housing inspection about the redevelopment of the opening. To do this, you should take a copy of the floor plan of the premises, display the design changes on it, and attach it to the corresponding application.
At the appointed time, an inspection employee will come to you and duly coordinate and formalize the acceptance of the apartment after the redevelopment has been completed. No approvals are required to slightly widen the opening in such a partition.
But how to obtain permission for more significant design changes will be explained in the instructions in our next chapter.
How to coordinate an opening in a load-bearing wall
As you can see, with ordinary partitions everything is simple, and approval for the relocation of the opening is made after the work has been completed. It's a completely different matter when it comes to a load-bearing wall. In order to make such structural changes in it, permission is required - and both the transfer and the expansion of the opening will have to be coordinated with the housing inspectorate.
- By the way, permission for redevelopment must be obtained not only individuals, but also legal. So a company that is planning such changes, for example, in its office, is also required to have a permitting document on hand. The only thing that does not require approval is changing the direction of opening the internal door.
- To obtain permission to make structural changes to a load-bearing wall, first of all, you need to obtain a technical opinion from the organization that designed the building. If you succeed, then you can safely go to the design office with this paper. It looks something like the one shown in the photo below.
- Next, copies of the certificate of ownership and registration certificate for the apartment are attached to the drawing, and an application for redevelopment is written. In a month and a half you will receive the desired permission - although this is not a fact. You will be given a 100% positive answer if you have a conclusion from the author of the project.
- If you were unable to obtain such a conclusion, then there is no guarantee that you will be allowed to move the opening, even if you submit a project. In any case, you need to apply for approval in advance, since in the event of unauthorized redevelopment, permission will not be issued at all, and you will also be punished.
- Once the approvals are completed and you finally have permission, you can begin work. When they are completed, the owner of the premises must notify the housing inspection and ensure the presence of its representative to accept and draw up the appropriate act. After this, an engineer from BTI will also come to you, who will put the last point in this epic.
- What situations are taken into account by the housing inspectorate when considering an application for redevelopment of an opening in a load-bearing wall? Mostly, difficulties arise for owners of apartments in multi-storey buildings. First of all, the total number of floors in the house matters.
- The higher it is, the less load on the floors becomes, and the greater the chances of getting approval to reconstruct the wall. The age of the building is also taken into account. If, for example, it is more than half a hundred years old, touching dilapidated structures can be simply dangerous. If permission for punching is given in such cases, then most often it is limited to the opening width of 90 cm.
- Again, when it comes to multi-storey buildings, the housing inspection examines the condition of the walls in all apartments below and above you. If one of your neighbors has already made an opening in this wall, then you may not receive permission. Or, on the contrary, they may demand that it be moved to the side.
In this case, all related factors are analyzed. For example, the opening on interior wall should not be located in the area where floor slabs meet; it also cannot be located closer than one meter to the outer wall.
An obstacle to making an opening can also be the presence of ventilation ducts or chimneys, or electrical wiring that cannot be moved. All these nuances require careful study - which is what the housing inspection does when considering applications.
The project as the basis for redevelopment work
A load-bearing wall, the original integrity of which has been damaged by knocking out or sawing out a fragment, needs to be strengthened. For this purpose they use metal constructions, whose role is to make up for the lost strength of the wall.
This is why a redevelopment project is needed. In addition to the dimensions of the opening and the rolled metal used to reinforce it, you can find a lot of other necessary information in the drawings.
- For example, the project will propose an option for arranging temporary support posts, indicate the installation locations of anchors, and show enlarged details of the nodes for fastening the metal to the floor. The designers will even offer the best way– after all, the metal structure needs to be hidden somehow.
- The options for framing openings are different, depending on the type of walls. In houses built on a reinforced concrete or metal frame, or with monolithic walls, reinforcement is kept to a minimum, and may not be provided at all on the upper floors.
If we talk about brickwork, then you will have to strengthen the opening even in the partition. But in modern panel houses, redesigning doorways will not be allowed at all.
The thing is that today they are built not even from individual panels, but from volumetric blocks that are load-bearing around the entire perimeter. Accordingly, there can be no talk of any additional openings here.
Opening reinforcement technology
So it turns out that most often openings are made in brick walls.
To strengthen them, a channel is usually used, which is placed as a jumper on both sides in pre-cut grooves with a prepared heel. They are tightened together with anchor bolts, and if the wall thickness exceeds 50 cm, cross members are also welded to them.
- The length of the steel beams is calculated as follows: divide the height of the opening in half, and add 15 cm to the resulting figure. The outer anchors should be installed in those places where the lintel rests on the pier, and the voids between them are filled with a solution based on self-expanding cement.
- Regardless of whether a new opening is made in a brick wall, or an old one is expanded, reinforcement is first made, and then fragments of the slopes are removed. If this is done manually, then first drill around the perimeter of the opening through holes, and then they use the jackhammer.
- But in general, there is such a technology as diamond cutting of structures. It is carried out at the request of the customer by specialized companies that have in their arsenal various equipment that allows cutting concrete, reinforced concrete, and thick brickwork quickly and without dust.
- Another thing is that not every city, not to mention smaller settlements, has such a service available. In this case, all that remains is percussion instrument, but, for example, in panel houses, it cannot be used - and this will certainly be reflected in the project. Vibrations and shock loads can cause cracks in concrete. And this can be fraught with consequences for the entire house, although the consequences may not appear immediately.
- As for strengthening slopes, in some cases it is not done. If such a need exists, then from the same channel, or unequal steel angle, a frame is mounted around the entire perimeter. This is why a project for redevelopment of openings is needed: why carry out work at random when everything in the drawings will be calculated down to the smallest detail.
- When constructing walls and partitions, they are used various materials: the wall can be monolithic, prefabricated, well, lined with brick or decorative blocks. Naturally, all this influences the choice of option for strengthening the opening being penetrated. Only the marking process looks the same.
Walls whose thickness exceeds 0.5 m are not so uncommon - especially when openings break through basements. In this case, even a wall saw cannot cut across the entire thickness at once. Therefore, markings have to be done on both sides.
Correct marking is the key to quality cutting
The main task is to correctly determine the mark of the horizontal part of the opening on one side, and accurately transfer it to the other side.
- This is done using water or laser level, focusing on perpendicular walls, or performing through drilling along the perimeter of the opening. Those who are trying to do this kind of work on their own should know that in order to avoid displacement of the marks, the drill must enter the wall at a strictly right angle.
- To achieve this, all means are good: someone pulls the mooring cord that plasterers use to control the horizontalness of the masonry rows; someone temporarily attaches a guide profile to the wall, as drywallers do. The main thing is to understand how important it is to do the markup correctly.
- For companies that provide such services to customers, such problems do not exist. Most of them use special electronic equipment, consisting of elements such as a detector and a target. They are installed on opposite wall surfaces, and when they are aligned, they sound a sound signal.
If the marking is done correctly, we can consider that half the battle is already done. After this, they begin to groove the wall in the place where the lintel will be installed.
We think everyone understands why it is mounted before removing a piece of the wall. Metal beam allows you to redistribute the loads from the weight of the floor and the own weight of the wall.
Because of design features standard panel residential buildings, organize an exclusive, individual project or an interesting planning solution is very difficult. To improve the functionality of premises, many property owners are thinking about redevelopment. Very often, performers are given the task of moving an opening in a load-bearing wall. To make such serious changes to the interior, it is advisable to attract qualified specialists from reliable, proven construction and repair organizations "MskDemontazh" and "Almaz-Leader".
Experienced craftsmen will carry out all the necessary activities as quickly and efficiently as possible and will help to avoid possible errors. Professionals do not recommend dismantling a section of a load-bearing wall on their own, especially to persons without relevant specialized knowledge and modern equipment. Improperly installed reinforcement can cause fatal consequences and lead to local collapse of part of the building. In order for everything to go smoothly, you need to install a protective frame that will take the load from the overlying floors.
Our craftsmen pay attention to the issue strengthening the opening in a panel house Special attention, because The successful outcome of the repair and the lives of all residents depend on this. In such buildings, the use of channel reinforcement is unacceptable; for safety reasons, it is customary to use a steel corner. Metal carcass it should be certain thickness, which is calculated in advance.
The sequence of actions when reinforcing a doorway with a corner:
- Installation of temporary wooden racks in space with a concrete floor;
- Cutting out grooves for installing the frame and lintel;
- Installation of rack corners in a given position, cutting off part of the shelf at the corner of the metal jumper, followed by installation and welding to the racks;
- Cutting part of the wall structure for installation of support corners;
- Installation and welding of support corners;
- Step-by-step, with scalding of the frame with plates;
- Finishing the surface.
Preliminary preparation is the key to success
Performance calculation of strengthening of openings in order to determine the load-bearing capacity of the piers of a load-bearing wall, this is a mandatory step, the implementation of which can be rationally entrusted to “” craftsmen. Durable and reliable load-bearing elements structure is a guarantee of the integrity and stability of the entire building, so a correct calculation will allow you to clarify several important points:
- How safe is it to create an opening of given dimensions in this particular location?
- Which method of strengthening will be most effective in the current situation;
- Will the remaining intact wall fragments be able to cope with the predicted loads, etc.
At the stage of verification calculations, "" workers will give a competent assessment of the strength characteristics of the load-bearing wall, taking into account such fundamental factors as:
- Geometric dimensions of the opening;
- Current and planned loads;
- Possible defects in wall structures, degree of damage structural elements etc.
After a thorough, multi-stage inspection, a technical conclusion will be drawn up on the advisability of further dismantling work in this area of the facility. In-depth engineering examination with numerous calculation manipulations and setting the appropriate expert assessment, will make life easier for the customer and help get rid of possible problems in future.
Inadequate condition of operating structures may cause changes to the design documentation for future redevelopment. Performers are required to ensure that the most secure and effective way to reformat the interior with a minimum of destruction. Our specialists are guided by generally accepted construction standards and adhere to safety precautions at all stages of the work process. We take full responsibility for the final result and guarantee the customer that all procedures will be carried out at the highest level of performance. We provide the client with full reporting on the work performed, including:
- Project documentation with drawings of the opening, diagram of the reinforcing metal structure, detailing of the node connections and other important aspects;
- Expenditure sheet for the amount of materials used, equipment used;
- Information about the services provided, regarding the sequence of manipulations performed, from preparatory stage before delivery of the finished dismantling project to the customer.
Order the full range of repairs from recognized industry leaders MskDemontazh and Almaz-Leader - it’s cheap, convenient and reliable.
Strengthening the load-bearing floors of a building when expanding existing openings or constructing them is carried out using metal profile- channel or corner. The channel, of course, is considered more robust construction, but The corner version of the reinforcement is more convenient to use and fits more tightly to the wall.
Subject to all technical requirements and correct calculation of the distributed load, strengthening the doorway with a corner can be done both in a standard panel wall and in a solid brick or concrete wall.
Stages of work execution
You can begin installing metal corners immediately after the opening in the load-bearing wall is ready. First the frame is assembled. To do this, the corners are cut to the required dimensions and rigidly fastened to the wall using clamps. Holes for anchors are drilled in the frame. For greater reliability, all frame parts must be welded. The clamps are removed, all frame parts are welded, and the structure itself is secured to the wall with anchors. Additionally, the corners are connected to each other by transverse metal plates.
Support elements are welded to the base of the frame to reduce point loads and correct weight redistribution.
There are cavities and gaps between the frame and the wall. Get rid of them using self-expanding cement-sand mortar. After caulking, the solution hardens, filling all cavities and voids and fixing the metal structure.
Types of corner structures
In order to strengthen a standard window opening, it is enough to install an upper metal lintel.
Doorways are reinforced around the entire perimeter using a welded U-shaped structure. Installing it on a solid wall begins with installing the top lintel BEFORE cutting the opening itself. This is necessary in order to avoid the appearance of cracks and destruction in the load-bearing wall. The corners are inserted into grooves pre-cut with a wall chaser and take on the main load. And then the opening itself is constructed. It is better if this is done using diamond cutting.
This method allows:
- Avoid destructive vibration effects on floors (as is the case with a sledgehammer or hammer drill);
- Get smooth and neat edges of the cuts, which do not require additional leveling with a solution or trimming with a grinder. Such edges allow for comfortable and quick installation reinforcing corner structure flush.
Prices for reinforcing openings with corners depend on what products are selected for the installation of a metal frame or lintel - equal or different flanges, hot-rolled or bent. Required view products are indicated in project documentation. Hot-rolled products are considered more reliable. Multi-shelf corners are used when it is necessary to reduce the weight of the finished reinforcing frame, while maintaining the ability to withstand load-bearing loads.
