Calculator for calculating cement for strip foundations. How to calculate the cost of the foundation for a house? Calculation of reinforcement for strip foundations

The foundation calculator will help you independently calculate the required volume of concrete for pouring the foundation, and will also calculate the amount of formwork and reinforcement. It is worth noting that the “Foundation height” parameter includes both the depth of the underground part and the height of the above-ground part.

If your interior partitions are not represented by a load-bearing type structure, then a lighter foundation layer is used under them, which has its own geometric parameters, and you need to calculate the foundation for the partitions separately in a calculator, and then summarize the data obtained.

Foundation calculation

Before you start building a house, the first thing you should do is familiarize yourself with the composition of the soil, since both the choice of foundation type and the costs associated with the construction process depend on the quality of the soil.

The next step is to calculate the foundation, namely to calculate the permanent load from the house itself, and the temporary load from wind and snow cover, in order to determine whether the soil will withstand the load from the house and the foundation.

Then you can start calculating the volume of concrete for the foundation. To do this, the length of the structure should be, and this includes both the perimeter from the outside and the length of absolutely all partitions between rooms, multiplied by its height and width, but provided that the foundation strip has the same cross-section along its entire length.

Concrete volume V=L*A*B , Where

L - Foundation length

A - Foundation height

B - Foundation width

If you are planning to prepare concrete yourself, then you should know that concrete is most often prepared from cement grades M 500 and M 400 using sand and crushed stone. When calculating the proportions of concrete, many factors should be taken into account, such as fractions of crushed stone and sand, their density, and the required qualities of concrete. The table “Concrete proportions” shows average data.

When calculating reinforcement for foundation reinforcement, it is worth knowing that the longitudinal bars bear the load, and therefore ribbed reinforcement is used for them, mainly 10-12 mm, and vertical and transverse bars are made of smooth and thin reinforcement, since they do not carry loads.

To quickly calculate the volume of concrete for pouring the foundation, as well as all the necessary building materials, you can use our foundation calculator located above.

Note: accurate concrete calculations are carried out for dry sand and crushed stone; if they are moistened, the volume of water will be different. Here you need to experiment with the volume of water.

Foundation base width A- depends on the weight of the building, the strength characteristics of the soil under the building, etc. It is recommended to accept based on the calculation results.
The width of the roof must be increased.
H- height of the foundation. Depends on the degree of soil subsidence (the more subsidence the soil, the higher)
HC- the height of the foundation (basement) above ground level. The required formwork area depends on it. The excess level should not be less than 200 mm.
The depth of the foundation into soil subject to frost heaving (loams, clays) should be no less than the depth of soil freezing in the given region. The depth should be no less than the thickness of the plant soil layer (30-50 cm)
In underground soils, the walls of the trench are unstable and will crumble.
Horizontal rows of reinforcement are made from “working” reinforcement with a diameter of more than 10 mm, and vertical rows are made from “structural” reinforcement with a diameter of 8-10 mm of smooth or periodic section.
The pitch of vertical reinforcement is taken from the conditions of non-sagging of the working reinforcement of the upper row.
It is prohibited to insert vertical reinforcement into the ground or install it on pieces of crushed stone and other improvised objects. The reinforcement frame must either be suspended or installed on specially made concrete support cubes.
The distance between the ends of the reinforcement must be at least 15 mm.

Since a strip foundation for a house is a closed loop of reinforced concrete beams erected under all the load-bearing walls of the house, choose one of the eight proposed standard foundation options based on how many load-bearing walls are planned in the house.

Option No. 1 is relevant if construction is planned without internal supporting walls, No. 2 if an internal supporting wall is needed, options No. 3-8 if more load-bearing walls are needed in the house.

Fill in the dimensions in millimeters:

X– The width of the foundation depends on your wishes and the possibility of construction on the site. Parameter value X take more than the width of the walls (i.e. the distance between the outer planes of the walls) by approximately 100 mm on each side to allow finishing. When you select the option X SP 50-101-2004 “Design and installation of foundations and foundations of buildings and structures” should be taken into account.

A shallow strip foundation is suitable for all types of soil except subsidence, peat bogs and water-saturated soils. And it is often optimal for frame, timber, and brick houses.

Y– the length of the strip foundation is determined by the length of the house.

H– The height of the foundation depends on the depth of the foundation (shallow from 0.3-1 m, buried up to 2-3 m) and the elevation above ground level. The foundation must be made below the freezing line and above the groundwater level. If it is not planned to equip auxiliary premises in the basement, then a height of about 150-300 mm above ground level is sufficient, and if the base is to be used, more. The height of the strip foundation H is taken from 0.3 m for light houses and reaches about 4 m for heavy stone ones. The key to a reliable foundation is an individual project that takes into account the characteristics of the soil on the site; height of groundwater; the depth of soil freezing in your region; the weight of the house (i.e. the load on the foundation from the weight of the walls, ceilings and roof).

A– thickness of the foundation strip, i.e. the distance between the outer and inner planes of the foundation depends on the thickness of the walls being built (accepted to be 100-150 mm more). Approximate values ​​of the thickness of the strip foundation for outbuildings (shed, bathhouse, garage) are in the range of 250-400 mm; for a 1-story light (for example, frame) house 300-650 mm; A 2-storey brick house is built on a foundation 650-750 mm thick.

WITH– the center-to-center distance between the foundation lintels (relevant for options No. 2-No. 8) depends on the features of your project.

Reinforcement parameters:

G– Number of horizontal reinforcing rows, for strip foundation G=2. It may be more depending on the magnitude of the existing loads. It is recommended that you familiarize yourself with SP 63.13330.2012. The capabilities of the online calculator allow you to calculate up to 10 rows of reinforcement.

V– The number of vertical rods connecting the reinforcing belts to each other can be from 1 to 5.

Z– The number of connecting rods is taken from 1 to 5.

S– Step length is the distance between adjacent vertical reinforcing straps. Optimal value S 300-500 mm.

Weight of 1 m reinforcement depends on its diameter. The approximate weight of one meter of different diameters of iron reinforcement is given in the table.

Formwork parameters:

Board thickness for assembling formwork, it is taken from 25 mm to 50 mm on the basis that the thicker the better (but also more expensive).

Board length. This parameter is usually selected around 4000-6000 mm, depending on the availability of lumber in the warehouse and the price of the formwork board.

The board is wide. To make formwork, use an edged board (possible on one side) with a width of 100-200 mm.

Installation of formwork requires care and a responsible attitude of performers in order to ensure the correct geometry of the future foundation.

It is important to strengthen the assembled formwork with wire so that it does not fall apart due to the weight of the concrete, cover the inside with plastic film, this will prevent concrete leakage and make it possible to reuse the boards for construction purposes.

Concrete composition parameters:

Bag weight, kg– here enter how much 1 bag of cement weighs in kilograms.

Concrete proportions by weight. The approximate ratio of components for a concrete mixture is 2-3 parts sand for 1 part cement, 4-5 parts crushed stone, 1/2 part water (the mixture should be plastic and not too liquid). However, depending on the required grade of concrete, the grade of cement used, the characteristics of sand, crushed stone, the use of plasticizers or additives, the proportions may vary. Standard rates of cement consumption for the preparation of prefabricated and monolithic concrete, reinforced concrete products and structures are regulated by SNiP 5.01.23-83.

Enter prices for building materials: cement (per bag), sand (per 1 ton), board (per 1 cubic meter) and reinforcement (per 1 ton).

This construction calculator will:

• calculation of the base area of ​​the strip foundation and the required volume of concrete for pouring it;
• calculation of the formwork area (i.e. the area of ​​the side surfaces) and the required amount of lumber for the formwork of a strip foundation and their price (if the height of the slab is not a multiple of the height of the board, then the number of boards is calculated taking into account covering the entire height of the slab);
• calculation of the number of bags of cement, tons of sand and crushed stone for a strip foundation and the cost of these components of concrete for pouring;
• calculation of the required reinforcement of a strip foundation, namely the number of horizontal, vertical and connecting rows of reinforcement, its length, weight and cost of reinforcement.

The calculator will also calculate the final cost of constructing a strip foundation, which will give an idea of ​​the level of material investment in the foundation of your home and allow you to make an informed decision about the feasibility of this type of foundation. You can also calculate other foundation options using our calculators and choose the optimal solution.

A strip foundation for a house made of foam blocks, gas silicate or brick is one of the most common options. It works great on stable soils and allows you to organize a full-fledged basement in the basement. But for the construction to be truly durable, everything must be done with high quality.

When ordering turnkey construction, you can simply rely on the calculations of the company’s managers, without going into too much detail. But it’s still worth roughly estimating the amount you’ll spend on building materials and services. To do this, you will need at least a schematic drawing of the future monolith with all the dimensions marked, as well as an online calculator for more accurate calculations.

Initial data

If you have a strip foundation in your house design, to calculate it you will need to not only determine the length and width of the monolith, but also the height, dividing it into an underground and above-ground part (basement). This will allow you to find out the depth of the trench and include prices for excavation work in the estimate. The diagram should also show all the lintels on which the internal walls of the house will rest. If the project has a heavy stove or brick fireplace, you will also need to pour a concrete bed under them.

Correctly drawn base geometry also makes it possible to determine the costs of auxiliary materials:

• The area of ​​support and contact with the ground in the underground part corresponds to the dimensions of the waterproofing.
• The squaring of the side surface of the tape from the outside is necessary in order to find out the amount of insulation; adding to it the area of ​​the internal walls, we get the formwork consumption.

Another important point is the brand of concrete. Here you already need to know the weight of the building and the operational loads that affect the strip foundation. After conversion to units of support area, you will receive the required value in kgf/cm2. Multiply this figure by a factor of 1.2 to have a 20% safety margin, and select the nearest M grade (rounded up).

Then you can use any online calculator to calculate the concrete foundation, but it will only give an approximate consumption. It remains to be determined how much turnkey construction services will cost. Here, a lot depends on the package offers of the contractors themselves, so it is better to first contact a suitable company to clarify all the nuances. Often the price list includes the following items:

• Transportation of the crew and/or accommodation on site during construction.
• Delivery of materials and equipment.
• Rental of special equipment.
• Using a generator and delivering water if there are no communications on the site yet.

The final cost of the work may also be affected by the season, soil characteristics and the depth of the aquifers - how much it will be in ruble equivalent, the foreman will tell you after assessing the site.

Calculation of materials for strip foundation

Here it all starts with the installation of a support layer - a sand and gravel cushion. You can determine the flow rate for it using simple calculations: multiply the area of ​​the base by the height of the compacted backfill (as a rule, it is 20-30 cm). The preliminary estimate should also include underlying waterproofing, which will prevent the solution from seeping into the pillow.

Afterwards you can proceed to the calculation of the formwork. Paired panels made of plywood or knocked down boards should have a height no less than the future strip foundation. They are installed along the external and internal perimeter of the house in accordance with the diagram. You will also need to calculate the amount of reinforcement to strengthen the concrete. It is laid in a monolithic tape with two longitudinal rods in the upper and lower parts. That is, the length of the future casting must be multiplied by 4, plus allowance for overlaps. Transverse ligaments are added to the resulting figure, which transform individual steel rods into a spatial frame. Calculators do this based on the requirements of SNiP.

At the same time, you can calculate the concrete for the strip foundation. Knowing the geometric dimensions of the base, the total volume of the mixture is determined by simply multiplying the area by the height. It is better to immediately add a reserve of about 10% so that there are no problems when the solution compacts in the mold. The possible difference between the design data and the actual volume of already assembled formwork should also be taken into account.

Then everything depends on the place where the solution is prepared. It is easier and more expensive to order its delivery from the nearest RBU - in this case, the cost of special transport services must be added to the cost of the mixture itself. It is best to confirm the final batch volume after the formwork has been assembled and re-measured on site. A more labor-intensive process is making concrete by hand. In this case, you will have to spend money on purchasing cement, sand and crushed stone, and also pay extra to the crew.

Turnkey filling price

When contacting contractors who will be pouring a strip foundation, you should decide whether you will provide them with building materials yourself or entrust the purchase to a construction company. In the first case, you only pay for the work - on average it will cost 4000-4500 rubles/m3. In the second, the cost of the finished base will be about 11,000 rubles/m3.

The concept of turnkey construction varies from company to company; the list of basic services needs to be clarified. You can find out prices for them separately if you want to save money and you are ready to do some of the work yourself. The “average” price looks like this:

• Site breakdown – 2500 rubles
• Digging trenches - 500-1000 rubles/m3.
• Sand and gravel cushion with compaction – 500-1100 rub/m3.
• Insulation tape – 150 rub/m2.
• Waterproofing is 360 rubles/m2 for single-layer pasting and 650 for two-layer.
• Assembling formwork, frame and pouring concrete - from 3000 to 4500 rubles/m3.

Approximate prices according to Moscow Region for a turnkey foundation

In the foundation calculation calculator you need to enter all the dimensions of the foundation, indicating the design features and the depth of the tape. Also, for correct calculations, you will need to independently determine the grade of concrete. Then the service will calculate everything automatically: up to the number of boards for formwork and the diameter of the reinforcement.

Online calculation service

The construction of any building begins with developing a project, determining the need for materials, and calculating the estimated cost. Before starting work, it is important to choose the right type and design of the foundation, which will ensure the stability and durability of the structure. Knowing the parameters of the designed foundation, the calculator will allow you to quickly calculate the amount of concrete, as well as determine the need for steel reinforcement and other necessary materials. For calculations, you can use an online concrete foundation calculator or do the calculations yourself.

How to correctly determine the consumption of materials for the foundation - getting ready to perform calculations

Before starting construction activities, it is important to correctly determine the need for building materials. This will allow you to plan the amount of costs and rationally use available financial resources. Since the construction of houses is preceded by the construction of the foundation, it is necessary at the initial stage to calculate the volume of concrete mixture required for pouring the foundation. In order to perform foundation calculations, a calculator is required.

You can perform calculations in different ways:

• using a ready-made program. A foundation calculator posted on professional websites will help speed up calculations;
• performing the calculation manually. It is easy, using a regular calculator, to calculate the amount of concrete for the foundation with a high degree of accuracy.

When performing calculations, it is necessary to take into account that the amount of concrete solution is measured in cubic meters, and not in liters or tons. Taking this into account, in the process of calculations we will obtain the volume of the concrete composition, and not the weight. Before starting calculations, you should decide on the type and design of the foundation.

To do this, you need to perform a number of activities:

• carry out geodetic surveys. They help determine the level of groundwater, soil characteristics and freezing depth;
• determine the loads acting on the base. The calculator posted on the website will help you correctly and quickly calculate the foundation for a house.

Having calculated the amount of concrete for the foundation, the calculator will take into account the following data:

• type of foundation being constructed. The professional program allows you to calculate the strip base, slab base and columnar structure;
• foundation design and dimensions. The configuration and dimensions depend on the characteristics of the building, the operating loads and soil characteristics;
• the brand of concrete mortar used for pouring. It is selected depending on the level of mechanical loads;
• soil freezing level. It is determined taking into account the territorial location of the construction site.

The correctness of the calculation of the solution, as well as the consumption of materials, depends on the completeness of the entered data.

What initial data are included in the calculator for calculating the foundation for a house?

Wanting to determine the total cost and calculate the need for materials, it is important to understand how to calculate the foundation for a house.

The calculator with which the calculation is performed processes a large amount of information for each type of basis:

• for a strip-type foundation base, it is necessary to take into account the dimensions of the strip, as well as its configuration;
• for a columnar base, information is processed on the number of supporting elements, their length, cross-sectional dimensions and immersion depth;
• for a structure in the form of a monolithic slab, it is necessary to take into account the thickness of the base, the area of ​​the structure being built, as well as the design features of the frame.

After the calculation of materials for the foundation is completed, the calculator will be able to provide the following information:

• volume of required concrete solution;
• footage of rods (m) and total weight of reinforcement (kg);
• range of reinforcement for the frame;
• the magnitude of the load on the ground;
• the need for wood for the manufacture of formwork.

Based on the results of online calculations, you can also obtain information about the dimensions of the spatial reinforcement frame.

Calculation of a strip foundation for a house - calculator

To determine the volume of concrete composition and calculate the need for materials, it is important to consider the following points:

• the length of the base, which must correspond to the perimeter of the building;
• the width of the tape, which should exceed the thickness of the walls by 10–15 cm;
• level of penetration into the soil corresponding to the characteristics of the soil.

By multiplying the indicated values, we obtain the volume of the foundation tape corresponding to the cubic capacity of concrete. Knowing the mass of a cubic meter of reinforced concrete, equal to 2.4–2.5 tons, it is not difficult to obtain the weight of the base. To do this, you need to multiply the total cubic capacity by the weight of one cubic meter of base. When performing calculations manually, there is a small error of 6–8%. It is important to accurately calculate the solution for the foundation. The calculator, which can be used online, provides this opportunity.

How to calculate materials for a columnar foundation

When building a columnar foundation, it is necessary to correctly calculate the foundation for the house.

The online calculator processes the following data::

• number of support columns;
• diameter and height of piles;
• dimensions of the expanded part of the support located in the ground;
• grillage dimensions;
• grillage structure configuration;
• brand of concrete mixture used.

Using available information about the design features and dimensions of the pile foundation, calculations can be made manually. To do this, you need to determine the volume of one support and multiply the resulting value by the total number of piles. The volume of the grillage is calculated similarly to the tape base. By adding the volume of the supports with the volume of the grillage, we obtain the total volume of the pile structure. Now calculating the amount of concrete is not difficult.

Concrete calculator for a foundation in the form of a monolithic slab

When planning to concrete a monolithic slab, developers are faced with the problem of how to calculate the amount of concrete for the foundation.

The calculator allows you to quickly determine the consumption of concrete mixture after entering the following parameters into the appropriate columns of the program:

• length of the slab base;
• width of the foundation slab;
• height of the reinforced concrete base.

By performing calculations manually, you can neglect the volume occupied by the reinforcement cage. You just need to multiply the dimensions of the structure and get its volume, which approximately corresponds to the need for concrete composition. To obtain accurate values, it is necessary to use software methods.

Calculation of materials for the foundation (calculator) - determine the need for cement

When preparing concrete mortar, various grades of cement are used as a binder. The strength, reliability and service life of building structures depend on the characteristics and quantity of Portland cement introduced into the concrete mixture. When calculating the material for the foundation, the calculator, which is a special program, processes a set of initial data and provides information about the need for cement for the foundation.

Using reference data, you can independently determine the amount of cement for preparing concrete mortar. It is important to consider the proportion according to which sand, cement and crushed stone are mixed. This ratio is 3:1:5. The concrete solution is formed from 9 parts, one of which is Portland cement.

Based on this ratio, the number of different grades of cement per cubic meter of concrete is determined.:

• M100 is used in quantities of 160–200 kg;
• M150 requires 200–220 kg;
• M200 is added at 240–280 kg;
• M250 is introduced at 300–330 kg.

As the grade of Portland cement increases, its quantity per cubic meter of concrete composition increases and is:

• M300 – 320–380 kg;
• M400 – 400–420 kg;
• M500 – 510–530 kg.

This information allows you to independently determine the need for cement with a high degree of accuracy. There is also a special online program that will quickly perform calculations after entering the required volume of the finished concrete mixture, the grade of concrete and the type of cement used.

Calculation of the foundation for a house - cost calculator

Having decided on the methodology for calculating the amount of concrete solution and the Portland cement used for its production, you can begin to determine the overall level of costs for constructing the foundation.

Total costs include the costs of purchasing the following materials:

• medium-sized river or quarry sand;
• Portland cement of the required grade;
• medium-fraction crushed stone.

It is also necessary to take into account the purchase costs:

• steel reinforcement intended for the manufacture of the frame;
• boards, plywood panels or metal for assembling formwork;
• tying wire used to join steel rods;
• hardware used to assemble the formwork structure.

An important element of the calculation is the transportation costs associated with the delivery of the necessary materials to the construction site.

Conclusion

Calculating cost items during the construction of the foundation allows you to accurately determine the total cost. You can use ready-made software products or perform calculations on your own. It is important to master a technique that ensures the right result. Timely budget planning will allow you to distribute funds evenly and ensure their rational use.

In country house construction, a strip base is most often used, which is rightfully considered universal. You can build it without involving specialists yourself. The main thing is to carry out all the calculations correctly, including the required amount of reinforcement for the construction of a strip foundation.

A strip base is a monolithic closed reinforced concrete strip running under each load-bearing wall of a building. This type of foundation is most often used in individual construction, because has a good set of necessary characteristics and excellent price-quality ratio.

It distributes the load along the entire perimeter and prevents subsidence and deformation of the building due to the acting forces of soil heaving. Wherein . Some hobbyists do not consider it necessary to reinforce the foundation. But this process is of great importance.

After all, ultimately the strip base acquires the following properties:

• strength, reliability and durability;
• ease of installation;
• possibility of waterproofing reinforced rods.

Reinforcing steel frame is the strength skeleton of a concrete foundation

Therefore, to increase the service life of the entire building, reinforcement is indispensable. But the main thing is not only to correctly strengthen the foundation, but also to calculate it correctly.

Planning the foundation must be done with particular care, because in case of deformation, it can affect the entire building, and fixing it can be very difficult and expensive. You can calculate the amount of materials required for a strip foundation and rolled steel for it yourself, or you can use the online calculator service.

An example of calculating a strip foundation

To calculate the strip foundation, you need:

• calculate how much the house weighs without taking into account the foundation;
• determine snow and wind loads;
• choose the type of base.
• calculate the area of ​​the foundation base, taking into account the bearing capacity of the soil.

Snow load can be calculated based on SNiP 2.01.07-85. Section 5 provides data for all areas. It is quite difficult to calculate the wind load of a strip foundation. You can use the simplified formula: (15 x h + 40) x S, where h is the height from the ground surface to the top of the building, and S is the area of ​​the structure.

When calculating the weight of a building, it is necessary to take into account the approximate weight of furniture and equipment located in the room. For example, with a building mass of 13384 kg, a payload of 11340 kg, a snow load of 8820 kg, and a wind load of 4410 kg, the calculations will look like this. Summing up these data, we get the figure 37954 kg. You need to add 30% to it for errors. As a result, the total load on the base is 49340 kg.

In order to calculate a strip foundation, it is necessary to take into account its base length and sole area. So, if the length of the load-bearing wall is 30 m (3000 cm), then: 24670/3000 = 8.2 cm. This figure is the minimum width of the strip base. But it is necessary to take into account that the thickness of the walls should be greater than the width of the foundation.

In order to calculate how much concrete is required, it is necessary to multiply the length of the load-bearing wall by the amount by which the foundation must be laid and by the width of the foundation. So, if the foundation on sandy soil is laid to a depth of 0.5 m, the width of the foundation is 20 cm (0.2 m), the length of the load-bearing wall is 30 m, then the calculation will look like this: 30 x 0.5 x 0.2 = 3 m3.

All materials for the foundation must be purchased with a small margin of 10-15%

Reinforcement calculation

Next, you need to calculate how much material will be needed for reinforcing work. For example, the diameter of the steel rod will be 12 mm, according to the plan in the casting there will be 2 horizontal rods, and vertically, for example, the rods will be located in increments of 0.5 m. The perimeter is 27 meters. So, 27 must be multiplied by 2 (horizontal rods) and the result is 54 m.

We count vertical rods in a similar way: 54/2 + 2 = 110 rods (108 intervals of 0.5 m each and two on each side). To account for the rods at the corners, you need to add 1 more rod, it turns out 114. If we take the height of the rod -70 cm, we calculate the length of the material: 114 x 0.7 = 79.8 m.

The easiest way to calculate the reinforcement for a strip foundation is to use an online service - a calculator.

Formwork calculation

If the parameters of the boards are: thickness 2.5 cm, length 6 m and width 20 cm, then the calculation will be as follows. The formula calculates the area of ​​the side surfaces: the perimeter is multiplied by the height of the casting, and then by 2 more (the fact that the internal perimeter is smaller than the external one is not taken into account): (27 x 0.2) x 2 = 10.8 m2. Board area: 6 x 0.2 = 1.2 m2, 10.8/1.2 = 9.

This means that as a result, 9 wooden boards are needed, the length of which will be 6 m. A small number of connection boards is added to this number(at the discretion of the builder). As a result: you will need 134 m of reinforcing materials and 27 linear meters of wooden blocks 20 cm wide. The example did not take into account the number of fasteners. The received data is rounded.

Calculation of reinforcement for a floor slab can also be done using an online calculator.

Reinforcement scheme

On a strip foundation, more longitudinal tensions appear than transverse ones. Therefore, you can choose rods with a smooth surface as transverse rods, and corrugated ones as longitudinal rods. The corners bear the most loads. Therefore, when reinforcing them, it is necessary that one end of the rod goes into one wall, and the other into the other.

The reinforcement process should begin with the installation of formwork. The inside should be lined with a layer of parchment. The main purpose of the formwork is to facilitate the removal of the structure. The task of the frame is to uniformly distribute all loads on the base.

Its scheme is simple:

• Steel rods equal in length to the depth of the foundation are driven into the bottom of the trench. It is necessary that there is, on average, 50 mm from the formwork in increments of 400-600 mm;
• install stands (80-100 mm);
• 2-3 threads of the bottom row of rods are attached to them. For stands, you can use bricks, placing them on the edges;
• at the top and bottom the rows are secured with transverse jumpers to the vertical pin;
• the places where they intersect are fastened with viscous wire or welding.

When calculating and constructing a strip foundation, it is recommended to take into account the requirements of SNiP so that the structure is strong and durable

Welding work contributes to overheating of the metal and entails a change in properties. The thickness of the rods in such places also decreases. That's why Wire is often used for knitting. After reinforcement, it is only necessary to make holes for ventilation and fill the trenches with concrete mortar.

Cost of fittings

Reinforcement can be purchased at construction stores. Its quantity is calculated in linear meters. Therefore, in order to find out how many meters are required and calculate the final price, necessary rolled weight table. Next, we calculate using the formula: (number of metal rods in running meters) and multiply by (weight of 1 running meter of rods for the corresponding diameter) multiply by (cost of 1 ton of rods)/1000.

The weight of the reinforcement depending on the cross-section can be seen in the table:

Reinforcement with a diameter of 12 mm and a corrugated or smooth surface is in great demand. It can be sold in rods and coils.

The approximate price for 12 mm diameter per 1 m can be found in the table:

Reinforcing a strip base is not at all difficult, although it is a fairly energy-intensive process that requires financial investment. But saving doesn't make sense. By choosing the right reinforcement and calculating its quantity, you can strengthen the foundation, while extending the life of the entire building.

You can watch an example of independent calculation of a strip foundation in the video: