Calculating the load on the foundation - house weight calculator. How to correctly calculate the foundation for a private house? Calculation of the supporting area, dimensions of the base, reinforcement and concrete Calculator of a strip foundation for a house made of foam blocks

Building a house is a very important moment in every person's life, and a good foundation is the key to creating a reliable structure that will last for many decades. At first, foundations were calculated manually, later using a slide rule, adding machine, and calculator. With the advent of modern computers and the Internet, they began to be paid online, on special websites. This is why the strip foundation calculator was developed.

Types of foundations for a house

The base of the house is a continuous concrete strip. Its size must be sufficient to distribute the load on the plot of land.

A proper foundation is of great importance for a home. It retains moisture, insulates from the cold and resists the movement of the earth around it, and in order to correctly make all the calculations, you need a strip foundation calculator.

Today, concrete is mainly used to build foundations. It is easy to pour, spread and level in the prepared trench. Because of its ability to harden quickly, concrete provides compressive strength to support loads. Previously, the foundations of houses were made of brick or installed directly on solid ground, and were also built from natural stone.

The most common building base for a house is a wall made of poured concrete or concrete blocks with a support system. The vast majority of houses are built using the foundation calculation method (a calculator can be found on the Internet). Structural parts of the base:

• Continuous concrete formwork.
• A foundation wall made of poured concrete or reinforced concrete blocks.
• Concrete floor slab.

These three elements are the structural components of the foundation system that serves to transfer the gravity of the load (the weight of the house) down to the ground. Concrete itself is not an ideal material for resisting the weight of a house as it is not very flexible, so steel reinforcing bars are inserted into it to resist any bending caused by the movement of the earth.

Foundation elements:

Sizing and pouring of the new foundation

The size of foundations built on soils that have low bearing capacity (such as clay soils) should be significantly wider than usual to provide greater stability. An excessive increase in the width and depth of the structure is not economically justified, so a reasonable option is to create foundations using reinforced concrete.

Reinforcing bars add tensile properties to the foundation, making the entire structure able to withstand tension and compression. The amount of reinforcement is set after the foundation has been calculated, for which purpose you can use an online calculator.

The size of the bases is influenced by several factors:

Selecting base width

It depends on the bearing capacity of the soil and the expected load of the structure. The higher the soil resistance, the smaller the width of the base for the same structure. If the base is mounted on an inclined surface, a stepped structure is used. Strip foundation is the most common type of foundation and the cheapest in cost. A strip of reinforced concrete supports the walls. An example is the online foundation calculator, taken from the site stroy-calculators.ru/lentochnii_fundament.php.

The depth of the trench may vary. The width of the base depends on the safe bearing capacity of the soil, and the thickness depends on the strength of the foundation material. According to the online calculator for a house of standard calculation No. 7 with a length of 14 meters and a width of 9 meters, the foundation must be at least 70 cm deep and 40 cm wide.

We receive a full payment.

Concrete foundations are made up of strips of reinforcement that provide a strong and level foundation. The load on the building is evenly distributed along the length of the foundation. Reinforcement has greater tensile strength than concrete - therefore, it can withstand significant loads.

The reinforcement structure is always made in advance and then installed in the formwork. The design of the reinforcing belt is simple, but before its manufacture it is necessary to make complex calculations that will ensure the reliability of the structure.

Stages of manufacturing a structure

It does not require special skills for construction, as well as special equipment, and the work on its construction can be completed independently. Main stages:

• Digging a trench.
• Installation of formwork.
• Installation of reinforced belt.
• Preparing and pouring concrete.

The benefits of an online calculator

The strip foundation (reinforcement and formwork) calculator will help you estimate the amount of building materials required for construction. As practice shows, the cost of building a foundation can reach one third of the total costs budgeted for the construction of a house or other building. The online application can simplify all assessments and plan the future monolithic structure. The developer will know the size of the foundation, the amount of concrete and other materials needed.

As a result of the calculations, the developer will receive the following data:

Since the app can be used as a concrete calculator, the quantity and cost of materials needed for the foundation can be easily determined. When planning, it should be taken into account that the composition of the mixture will depend on the brand of cement and the size of the gravel. The price for gravel and sand must be indicated per 1 ton, and the purchase is made for 1 m³. The online reinforcement calculator for strip foundations will help you perform all the calculations.

Before you start pouring the concrete mixture, you need to have the necessary supply of materials, such as reinforcement and building materials for formwork. It is better if you have the opportunity to purchase a ready-made concrete mixture: then you can pour the entire foundation at once. In any case, its filling must be completed in one day, otherwise phenomena may occur that lead to cracking of its structure.

Pros and cons of strip foundations

They have both positive and negative qualities.

Advantages:

• Simplicity of design, the ability to build a foundation without expensive tools.
• Ability to withstand heavy loads.
• Easy to assemble, no special training requirements.
• Long service life.

Flaws:

• Not suitable for all soil types.
• One-time pouring, the entire volume at a time, and preparing such an amount of concrete are quite problematic.

Reliable and durable strip foundations are suitable for many buildings and are the best option for building a house.

A strip foundation is a prefabricated or monolithic foundation made of high-strength reinforced concrete blocks, which are laid along the perimeter of the future structure, as well as in areas of load-bearing structures. The formation of a strip foundation does not involve the use of heavy construction equipment, but at the same time it requires absolute accuracy of calculation and measurement operations. The interactive strip foundation calculator will allow you to quickly and accurately calculate the proportion of sand, cement and crushed stone when making concrete manually, the dimensions of the strip, as well as the parameters of the formwork and foundation reinforcement for a house made of foam concrete or aerated concrete.

Advantages of the online strip foundation calculator

• Saves time, nerves, effort and money when drawing up cost estimates for the purchase of building materials.
• Allows you to estimate the volume of creative actions, as well as predict the timing of the formation of a strip-type foundation.
• Proper calculation of the parameters of reinforcement and concrete guarantees high strength and reliability of the internal frame of the structure.
• The ability to instantly calculate parameters for a monolithic or prefabricated, shallow or deeply laid strip foundation.
• 2D and 3D visualization options allow you to clearly assess the adequacy of calculation manipulations and make the necessary corrections in a timely manner.

Problems that the calculator solves

Calculation of reinforcement for a strip foundation helps determine the total length and weight of the reinforcement cage, as well as the minimum diameter of the transverse and longitudinal bars, the number of rows in the reinforcement chords, the spacing of the clamps and the amount of overlap. Calculations are made in accordance with the rules of SP 52-101-2003.

Calculation of concrete for a strip foundation provides information on the proportions of sand, crushed stone and cement, as well as the weight of the main building material for pouring the strip foundation. The calculation results make it possible to correctly and competently distribute the load across the structure segments.

The calculation of the formwork specifies the total length of the perimeter, as well as the area of ​​the base and the outer side edge of the reinforced concrete strip.

An online calculator for calculating strip foundations works for you completely free of charge. If you have any questions, write below in the comments - we will definitely help you.

Please indicate the required dimensions in millimeters

X- foundation width
Y- foundation length
A- foundation thickness
H- foundation height
C- distance to the axis of the jumper

A- foundation thickness
H- foundation height
S- step between connections
G- horizontal rows
V- vertical rods
Z- connecting rods

The required amount of cement to produce one cubic meter of concrete is different in each specific case.

This depends on the brand of cement, the desired brand of concrete produced, the size and proportions of fillers.
Indicated in bags.

There is no need to repeat how important it is when designing a house to calculate the amount of building materials for the foundation of the house.
After all, the cost of a monolithic foundation reaches a third of the cost of the house.

This service will make it easier to plan and calculate the foundation of a house. It will help you calculate the amount of concrete, reinforcement, and formwork boards for installing a strip foundation.

What you can find out:

Footing area (for example, to determine the amount of waterproofing to cover a finished foundation)
The amount of concrete for the foundation and floor slabs or pouring the basement floor (it will be fun when, due to a simple error in multiplication, there is not enough concrete)
Reinforcement - quantity of reinforcement, automatic calculation of its weight based on its length and diameter
Formwork area and quantity of lumber in cubic meters and pieces
Area of ​​all surfaces (for calculating foundation waterproofing) and side surfaces and base
Added calculation of the cost of foundation building materials.

The program will also draw a drawing of the foundation.
I hope that the service will be useful to those who build the foundation with their own hands and construction specialists.

concrete composition

The proportions and quantities of cement, sand and crushed stone for preparing concrete are given by default as a guide, as recommended by cement manufacturers.
The same goes for the price of cement, sand, and crushed stone.

However, the composition of the finished concrete greatly depends on the size of the crushed stone or gravel fractions, the brand of cement, its freshness and storage conditions. It is known that during long-term storage, cement loses its properties, and with high humidity, the quality of cement deteriorates faster.

Please note that the cost of sand and crushed stone is indicated in the program for 1 ton. Suppliers announce the price per cubic meter of sand, crushed stone or gravel.

The specific gravity of sand depends on its origin. For example, river sand is heavier than quarry sand.
1 cubic meter of sand weighs 1200-1700 kg, on average - 1500 kg.

With gravel and crushed stone it is more difficult. According to various sources, the weight of 1 cubic meter is from 1200 to 2500 kg, depending on the size. Heavier - smaller.

So you will have to recalculate the price per ton of sand and crushed stone yourself or check with sellers.

However, the calculation will still help you find out the approximate costs of building materials for pouring the foundation. Don’t forget the wire for tying reinforcement, nails or screws for formwork, delivery of building materials, costs for excavation and construction work.

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.

Diameter fittings, mm	Weight of 1 linear meter of reinforcement, kg
6	0,222
8	0,395
10	0,617
12	0,888
14	1,21
16	1,58
18	2
20	2,47
22	2,98
25	3,85
28	4,83
32	6,31

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.

Well designed and built foundation guarantees long-term operation any building and structure. Today there are several popular types of bases, but the most popular of all is certainly the tape type. To create it, no special equipment is required, and the installation technology is as simple as two fingers - everyone is able to build a strip foundation with their own hands.

The service site invites you to perform strip foundation calculation using an online calculator. It is designed to calculate the quantity and volume of materials, select the optimal tape thickness, determine the permissible load on the ground, and much more. For clarity, the program displays dynamic drawings and a 3D model, which change depending on the selected parameters and specified values.

The calculator allows you to calculate MZLF, standard or deep foundation monolithic type - the calculation method is no different in all cases. For the convenience of users, the program algorithm includes the calculation of reinforcement and the calculation of concrete for a strip foundation. There are plans to add formwork soon.

Instructions

Our service allows you to calculate the strip foundation for a house as accurately as possible, however, the reliability of these calculations directly depends on what parameters you fill in the fields of the calculator. Especially to eliminate such misunderstandings, it was written down training video with a detailed explanation of all elements of the strip foundation calculator and the values ​​used. See the instructions and ask your questions in the comments if clarification is needed.

For those who do not have the opportunity to watch the video with sound or have problems playing the video, we have prepared a shortened text version of the example of calculating a strip foundation on our service. Read below.

Fill in the fields of the calculator ATTENTIVELY, since any, even minor, mistake can be worth the time and money spent.

Interface overview

The interface of the strip foundation calculation calculator should be intuitive for most users, as it is quite simple.

The main part of the program is divided into several large elements:

• Introductory block with initial data and a simplified diagram.
• A detailed drawing of the strip foundation, which is drawn based on the first point.
• An interactive 3D model that allows you to view all structural elements in three-dimensional space.
• Calculation results (materials, quantities, permissible values...).

Also under the calculator itself, there is a small information about what formats are available for downloading, how to save the result, send it by email or bookmark it.

Scheme

Based on the plan of your house, you begin to visualize the construction of a monolithic strip foundation. Using the configurator, set the required number of tapes and their location.

The service limits the maximum possible number of horizontal and vertical axes. You can specify no more than 2 additional lines in each direction, i.e. a total of no more than 8 axes.

In order to add parallel horizontal (letter) axes, select the required number (1 or 2) in the first item AD0. The new lines will be located between the AD axes and will be called B and C.

Vertical axes (numerical) are added not to the entire length of the strip foundation, but specifically to each section AB, BC or CD.

To offset a section, fill in the Side Offset field. See below for a practical example about this.

Example 1.

In order to get a square monolithic strip foundation for a house, divided into 9 equal blocks, you need:

• add two axes at point BC0;
• add two axes at point CD0.

Example 2.

You have a non-standard foundation, which is divided into 6 unequal sections. Block AB is split into three parts, block BC into two, but CD is not split.

• add two axes at AD0;
• add two axes at point AB0;
• add one axis at point BC0;
• Leave zero in CD0.

Thus, “playing” with the values, you can make a schematic drawing of the foundation with any types of sections. Also, for your convenience, it is possible to rotate the drawing (90, 180 or 270 degrees), select its color, turn on the grid and whether to show guide lines.

Foundation characteristics

Now we need to indicate the dimensions of the sides, the width of the strip, the height and depth of the strip foundation, as well as the grade of concrete used.

Filling out the fields with the dimensions of the sides should not cause difficulties - everything is clearly illustrated in the drawing of the strip foundation.

Tape height calculated individually, depending on your preferences, the height of the base or for other reasons. The standard size is 40-50 cm.

A little theory. The construction of a strip foundation on highly heaving soils with a high groundwater level is only possible if the strip is buried 30 centimeters or more below the freezing level, i.e. you will have a recessed base. In this case, the forces of frost heaving act not vertically, but tangentially, thereby significantly reducing the destructive effect. For all other situations, when the soil is not subject to severe heaving, it makes sense to use a shallow (non-buried) strip foundation, as it is the most advantageous and easiest to install.

Tape width selected based on the type of underlying soil on which construction is proposed and the mass of the overlying structure. The point is to maintain a balance between the pressure of the structure on the ground and the maximum permissible pressure that the soil can withstand. For most cases in private construction, the rule is that the width of the tape should be 10 cm greater than the thickness of the wall. However, if the calculator issues a warning that these values ​​are unacceptable for you, use the recommended value that it offers you.

Calculation of concrete for strip foundation - Calculator

To build the base, it is recommended to use only high-strength concrete solutions grade M300 and higher. Using a mixture of less strength can lead to deformation and destruction of the structure - saving money on cheaper materials is inappropriate in this case. Fill in the appropriate fields in the calculator to perform a reliable concrete calculation.

You can make an approximate calculation of the load on a strip foundation based on the mass of the house box using a special building block calculator. To obtain a more accurate value, add 10-15% to take into account the weight of the roof, snow and wind load. On the page for calculating the soil resistance of the foundation, find out the maximum permissible load on the underlying surface.

Bedding

Foundation filling ensures the reliability and durability of the entire structure of the house as a whole. In most cases, a cushion made of sand, crushed stone or ASG is used. Our default calculator assumes that you will use sand. Depending on the type of soil, the thickness of the cushion should be from 30 to 60 cm.

Calculation of reinforcement for strip foundations

Creating a reliable foundation is impossible without manufacturing a high-quality reinforcement frame, so it is important to correctly calculate the reinforcement for a strip foundation. Select the expected diameter of the rods, the number of horizontal rows, rods and the pitch between the vertical rows. If you plan to deepen the reinforcement into the ground, indicate this in the appropriate field.

If you do not know or are not sure how to properly knit reinforcement for a strip foundation, you should refer to certain standards that are set out in SNiP 52-01-2003 (SP 63.13330.2010), in particular, special attention should be paid to the paragraph “Design requirements”:

• clause 7.3.4 - the minimum distance between reinforcement bars should be taken depending on the diameter of the reinforcement, but not less than 25 mm;
• clause 7.3.6 - the distance between the longitudinal reinforcement bars should be taken no more than twice the sectional height of the element and no more than 400 mm, and the greater the load on the base, the less it will be, but not less than 100 mm;
• clause 7.3.7 - transverse reinforcement should be installed in increments of no more than half the working height of the element’s section and no more than 300 mm.

By following these rules, you can be sure that you are correctly laying reinforcement in the strip foundation. These rules apply to private construction, but for more complex structures, there are certain amendments and notes that need to be read in more detail.

You can also check the box to have the reinforcement drawn on the 3D model. In this case, the program calculation may take up to 5 minutes, depending on the performance of your device. Even if the browser prompts you to close the page, wait until the operation is completed!

Monolithic slab on a strip foundation

A strip foundation with a monolithic floor slab is an excellent solution if you want to protect your home from pests (rodents, insects), and are also afraid of premature destruction of the wooden floor due to high humidity or deformation of the floor when pouring concrete into individual cells between the strips. Concrete flooring is perfect for both light houses made of foam blocks and aerated concrete, and heavy houses made of brick and stone.

Indicate in the program the desired slab thickness, the side of the reinforcing mesh (the side of the square cell), the diameter of the reinforcement and the grade of concrete (M200 or more).

Once you fill out the entire field, click the “Calculate” button!

After the calculator makes the necessary calculations, you will have access to a foundation drawing and a three-dimensional model of the structure.

Plan- this is a top view of your base indicating linear dimensions. This is your main guideline during construction; it allows you to get, in a simplified form, a clear idea of ​​what is required of you and what you should strive for.

3D view clearly demonstrates the appearance of the future foundation. Visualization helps to evaluate the project in real proportions, see the pros and cons of the proposed design and make a final decision - is this what you need or not. You can see on it the surface of the earth, the sand cushion, naturally, the foundation itself and the masonry of reinforcement. All elements are interactive and are built based on the specified data.

Calculation results

Our service calculates all the necessary parameters that can be used in the construction of the foundation. Let's look at some of them in more detail.

Foundation

The foundation pressure on the base of the soil should not exceed the maximum permissible.

If the width of the foundation tape was selected incorrectly, the result will be highlighted in red. This means that the building structure is too massive, and the tape will cut through the ground until it meets an obstacle. If you specified everything correctly, then you will see green backlight.

According to SP 52-101-2003, the percentage ratio of the cross-sectional area of ​​longitudinal reinforcement to the cross-section of the foundation slab ( reinforcement coefficient) for concrete structures, must be not less than 0.025%. If your value is less than the standard value, you should increase the number of vertical and horizontal rows.

Materials

This block displays all the materials and their quantities (dimensional values) that will be required during the construction of the strip foundation and related elements. For example, you can find out:

• volume and mass of foundation concrete;
• the total length of the reinforcement bars and their number;
• how much binding wire is needed;
• what is required to cast a monolithic slab onto a tape;
• how much sand should be ordered for the foundation and for the concrete screed;

The remaining elements can be found directly in the interface itself.

Calculation of strip foundation - Example

Background theoretical information helps to understand some controversial issues, but everything becomes much clearer when you look at a real practical situation.

We selected a random diagram of a one-story house from the Internet and, based on it, calculated the strip foundation using our calculator. All initial conditions are presented in the image. The lengths of the sides are indicated in millimeters, but for convenience we will write them in centimeters.

Let's build a simplified diagram using the "Orientation" block.

Let's transfer all the dimensions from the drawing to the calculator and assume that The width of the tape will be 40 cm.

In order to get the space on the left for the “Kitchen-Living Room”, you need to move the CD side to the right. Fill in the side size and look at the length of the terrace, it is 300 cm (3000 mm), which means you need to enter 300 cm in the “CD side offset” field.

As we can see, the lower room is a little crooked, and the dimensions are not at all the same as we indicated in the conditions.

Firstly, this is due to the fact that in the diagram that we repeat, the length of the side of the room together with the wall is equal to the length of the side without the wall, which in itself is fundamentally wrong.

Secondly, please note that in the strip foundation calculator, the countdown begins on the sides not from the edges of the tape, but from the internal axes of symmetry.

The calculator supports entering NEGATIVE values ​​in the Side Offset field. Axis 1 is taken as zero. This is necessary so that you can create a strip foundation of any shape.

Now you know how to calculate the strip foundation for a house using our calculator correctly. Please note that the highlighted items must be highlighted in green, otherwise the foundation will be extremely unstable.

First of all, the base may not withstand the load of the overlying building structure and the tape will soon become deformed. In the second case, if the width of the tape is insufficient, the structure will begin to go deeper into the ground until one of its parts rests on denser rocks and, then, due to the uneven distribution of pressure, the foundation will simply break.

We hope that you found the instructions for using the strip foundation calculator useful. If you have questions, comments or suggestions regarding the service, please contact us in any available way.