Calculation of tape fundament

Examples how to calculate this species of an important construction site are intended for those who independently build housing or proceeds to construction for the first time. Taking advantage of the formulas and data, they get for a solid, good-quality belt foundation calculation and lay the durability of the whole building.

Calculation of a tape basement. ON-LINE calculator calculation

In on-line mode, the user has the right to produce a complex mathematical calculation of the future monolith under the ribbon foundation. On the pages are set to monotonous tables. Having learned to use at least one of them, it is easily calculated on any other. This method allows accurate calculation for different types of foundation, formwork, calculate the valve parameters, the consumption of the concrete mix.

1. Deciphering calculation points:

• the name is the total length of the tape. It implies data on the perimeter of the foundation. It is followed by real numbers that are taken after the object of the object;
• the name of the ribbon sole area. Determination of the reference area of \u200b\u200bthe future base. Must coincide with the sizes of the selected waterproofing system or material;
• name area of \u200b\u200bside surface external. It is accepted equal to the insulation area for the outside;
• name volume of concrete solution. This is the magnitude of the concrete required to build the foundation for specific characteristics. Determined only in the independent production of concrete solution. The amount of the registered solution will be different from the real figure due to the sealing of the solution during the fill process. The result is increased for reserve by 10%;
• name Mass of concrete solution. It is calculated on the averaged density of the cement-concrete solution;
• title load on the soil produced by the calculated foundation. Shows the magnitude of the load distribution on the total area;
• name The smallest longitudinal diameter of the reinforcement rod. It is selected from the SNIPs, where all adopted diameters are indicated, taking into account the concentration of reinforcement on the cross section of the ribbon basement area;
• the name is the smallest number of rows of reinforcement in the lower and upper belts. The estimated number of rows of longitudinal rods in one belt belt. Determined from reducing the real deformation of the tape from compression or stretching during operation;
• name Minimum diameter of clamps. After the calculation, select the nearest SNiP value;

• name Step Homutov. The figure required to reduce the shift of the armature frame in the bay of concrete mortar;
• name The size of the allen reinforcement. Calculated for fine fastening of rods or rod;
• the name is complete, the total length of the reinforcement length. The magnitude of the total length of the reinforcement during the fine mating frame;
• the name is the total weight of the reinforcement. Mass of all reinforcement bones;
• name The magnitude of the thickness of the formwork boards. It is selected according to the characteristics of the foundation taken by the step of the support from the SNIP table for GOST P 52086-2003;
• number Number of boards for formwork equipment. It is calculated in meters of the route or in the edged material in meters.

A real example of calculating the tape basement of bunched soils:

We accept the data: a monoblock concrete mounted on crushed stone from granite. For better understanding, make an independent scheme plan.

Ribbon foundations, the outer area of \u200b\u200bwhich has a tilt, is better to oppose the irradiation, swelling, destroying frost. Therefore, an object with such features is adopted for the calculation.

1. Data for calculation:

• fundam, tape, size 6x3 m;
• at the top of a part 0.2 m;
• the bottom sole of 0.25 m.

2. Performance housing for billing tape base:

• aerocrete walls with a thickness of 400 mm;
• the floor of the ground floor. The bulk of granite rubble and soil;
• a full two-storey house;
• floor decks. Zheleznobetonnye plate factory;
• roof. Ramp at 45 degrees. Wooden joists that are covered with tiles;
• priming. Plastic clay;
• location of new building. Hilly plain.

The maximum load on the strip foundation is made from the side, portions of 6 meters due to the fact that there is pressure floor slabs, roofs lag.

The total load on the foundation is calculated by the sum of all loads from the snow from the roof, from the floors, the walls of the house, from foundation material.

3. Calculation of the snow load:

• select SNIP load for a particular area. Multiply figure with the cargo area of \u200b\u200bthe roof to the foundation 1 m;
• calculated area of \u200b\u200bthe roof, a simple arithmetic method is the total value of the roofing area. The resulting figure divided by the length of the base side of the tape base (6.0 + 6.0 \u003d 12.0 m). It does not take into account the value of the ends;
• roof area: slope is calculated by multiplying the length by the length of the eaves and the double product;
• skate length: DSC \u003d 3/2 \u003d 1.5 / cos 45 \u003d 2, 145 m;
• total area of \u200b\u200bthe roof Skr: 4.29h 2h2.145 \u003d 6 m2 \u003d 25,74;
• cargo area per 1 m of the tape foundation: 25.74 / 12 \u003d 2.145 m2;
• choose a zone of moderate standards, e.g. 2nd, specific snow load value \u003d 700 N / m2;
• snow load value: 2.145h70 \u003d 1500 N.

4. Determination of the roof load:

• it is determined by the load of one square meter in the horizontal projection of the roof;
• according to our data it is 1.5 m gable roof tile located at 45 degrees of inclination;
• coefficient selected from the table corresponding SNP \u003d 800 N / m2. 1.5 x 80 \u003d 1200 N.

5. Determination of the load of the floors:

• coefficients are selected from the respective tables SNP;
• cargo area overlaps \u003d 6x3 \u003d 18/12 \u003d 1.5 m2. 12 - is the length of the sidewall;
• load of wooden beams loft of table \u003d 300 kg / m3;
• load of the concrete slab \u003d 500 kg / m3;
• the total load of overlap: 1.5 x (300 + 500) \u003d 12000 N.

6. Load on 1 meter strip foundation from exterior walls:

• m2 is the product of the load on the wall thickness and height above the base wall;
• sNP selected from the table load of one square meter of the wall;
• our calculation assumed height of the wall of aerated concrete thickness of 3 m 40 cm.;
• area: 3 x 0.4 x 600 \u003d 7200 N.

7. Calculation of the load from the gas unit foundation:

• load value \u003d volume of the meter section of the foundation multiplied by the value of the material density;
• the density of the material is selected from the corresponding table of SNiP;
• for the 2nd zone (taken in the calculation of the snow load), on the pumped ground when booking the foundation inland by 1 meter, the volume of 0.450 m3 can be taken;
• coefficient for concrete and rubble \u003d 2300 kg / m3;
• total value: 0.450 x 2300.0 \u003d 10350 N.

8. Calculation of total load on the length of the length of the sole:

• total load: 150.15 + 120 + 1200 + 720 + 1035 \u003d 42250 N;
• comparison of the calculated value with the recommended value for plastic clay \u003d 15 H / cm2. The area of \u200b\u200bthe calculated foundation is 50 x 100 cm \u003d 5000.0 cm2. 4225, 15/5000 \u003d 9 N / cm2. It is possible to build a foundation from aerated concrete for a given area for the accepted parameters.

To transfer Newtons to the value - kilograms of force adopted in the MKGSS measurement system, you need to divide the calculated values \u200b\u200bby 10.

Ordinary pile and ribbon foundation. Calculation of independent construction

The peculiarity of the purpose of the pile and ribbon foundation is poured on the unstable soil. The optimal material for its manufacture is a ready-made solution of M300 brand concrete, and even better M350. This material is intended for wet, floating, bubbly soils. Well established itself during operation in unfavorable zones in humidity.

1. Calculation of concrete for a ribbon foundation:

• first, the volume of concrete for the foundation tape is calculated. It produces a simple arithmetic multiplication of the length, widths and depth of the tape;
• next, the volume of concrete for piles is calculated. By formula: V \u003d Pi x R2 x H. Changing PI - standard value taken 3.14 R - Radius of the pile rod, H is the height of the pile rod or the height of the pile itself;
• now practical work. Take a building meter and measure the real values \u200b\u200bof your building material;
• substitute the values \u200b\u200bto the appropriate place in the formula, calculate the volume of one unit of pile;
• multiply a single volume by the number of purchased piles or the estimated number of products in the future design;
• but learning the total volume of tapes, the total amount of concrete mixture under pile, calculate the tonnage of the concrete solution.

2. Simplified method for calculating the volume of concrete mortar for piles:

• the standard size of the manufacture of piles with a diameter of 200 mm is accepted;
• simpler, pile with a length of 1000 mm, with a diameter of 200 mm will require only 0.125 m3 of concrete mortar;
• this figure varnims itself with a real-required pile length;
• after calculating the volume of concrete mortar, do not relax. Make a metal frame, preferably from A3 reinforcement.

Calculation of fine-breeding belt foundation for beginner builders

The main purpose of the finely laid foundation is to withstand the design of a small structure on a more or less stable soil, without kata climate seasonal troubles.

The main stages of the calculation:

• the characterization of the hydrogeology of the soil at the construction site is determined;
• it is necessarily founding the possibility of groundwater under the site under the site, their location to the surface, seasonal sailing, bunch, and so on;
• to accurately determine, the real owner will not regret money on the challenge of a specialist and the preparation of the hydrogeology of the area;
• a finely blurred foundation is installed on sand or homogeneous composition of soil;
• determine the local composition and properties of the soil;
• calculate the parameters, as for any belt foundation, if desired, using the methods described above. Do not be lazy and calculate according to the general principle. It is more complicated, but also more reliable;
• determine the weight of all structural elements required in the calculated formula;
• correction of dimensions and parameters of a possible design according to the data obtained from arithmetic calculations.

Calculation of a tape monolithic foundation

The simplest of the formations of the foundation belt. All you need is to identify some specific quantities:

• b - wall width, H is the elevation of the bay, P is the perimeter of the building;
• the volume of the substitution of the concrete solution is calculated: H\u003e / Z + 10 cm. It is clear that H is the highness of the fundamental, Z- deep place of the column;
• the resulting value is compared with the length of anchoring. Blow to take more or equivalent anchoring;
• the volume parameter is determined: B - walls, multiplied by a common P (perimeter) of a room / structure, H - casting height;
• the volume of internal lining: the usual formula to determine the volume of the school course: L - length, b - width, h - height, multiply;
• calculate the formwork. Found a side surface area (tip for those who forgot) multiply a double perimeter with a low tide height. Calculate the area of \u200b\u200bthe unit of the opairmock: width, multiplied with a length;
• units of boards: Share the sum of the side surface area per unit area of \u200b\u200bthe product.

Simplified valuation of reinforcement for a belt foundation

By making a decision and drawing a sketch of reinforcement, proceed to the calculation: volume and quantity. The wrong definition will make twice pay for delivery, suspend construction, as well as spoil the working mood.

1. For example, we present the calculation on the numbers:

• a predetermined perimeter of the house (6+ 7) x 2 \u003d 24 units. change Total perimeter at home;
• 25 + 6 \u003d 31 units. change - the total length of the foundation;
• 31 x 4 \u003d 124 units. change - The total length of reinforcement.

In the case of acquiring a rod not the magnitude that is designed or required, in the case of planning to connect trimming, pieces in one part, take the supply of wire material from 1 meter. The connection must be made by braziness, do not save on the strength of the house.

• we admit that rods have only 1 connection. It means that the scheme requires 4 reinforcement rods, multiply on the number of walls in the house 5 and we obtain 20 connections. Which means additional 20 meters to the calculated;
• general Method for Armaturin - 124 + 20 \u003d 144 meters.

2. Example of calculating for rods with smoothness of the surface of a diameter of 8.0 mm, which will go to vertical racks, horizontal crosslinks:

• length between the elements \u003d 50.0 cm;
• 31 / 0.5 \u003d 62. Received the number of units of reinforcement rings;
• the grille, for example, also with a height of 50.0 cm, and the distance of 25 cm, then the calculation of this: (50.0 + 25.0) x 2 \u003d 150.0 is the perimeter of the reinforcement ring;
• next, the length of the total is multiplied by 1.5: 62 x 1.5 \u003d 93. The result is the magnitude of the length of the rod;
• it is required to take into account the trimming factor, re-adhesive, marriage. Professionals are recommended to increase the arithmetic digit by 10% to get the real value.