✔ Calculate a strip foundation in 5 minutes and get a complete and accurate set of drawings https://buildup.ru/ Strip width: what should it be? Perhaps the most popular question among people who are going to build a house on a strip foundation. And this is not surprising: a strip that is too narrow will crack under load sooner or later. A strip that is too wide can push through the soil and sag under its own weight. So how can you find the "golden mean" thanks to which the foundation will last a long time and not cause problems? 00:00 - 00:23 Strip foundation width: what should it be? 0:23 - 0:42 how to calculate the width of a strip foundation 0:42 - 1:05 what the width of a strip foundation depends on 1:05 - 1:44 how to calculate a foundation with your own hands 1:44 - 2:26 calculation by deformations 2:26 - 2:48 width of the sole 2:48 - 3:16 - load calculation, strip depth, type and amount of material 3:16 - 3:32 construction calculator for strip foundation 3:32 - 3:49 calculation of the specific gravity of materials 3:49 - 3:55 determination of the load on the foundation 3:55 - 4:52 prefabricated load on the base 4:52 - 5:24 determination of the bearing capacity of the soil (soil resistance) 5:24 - 6:30 calculation formula So, let's figure out what the width of the strip depends on. The first is the type of soil. The more heaving and softer it is, the more massive the tape should be. The next factor is the area of ​​the house. Third: the thickness of the supporting structures - the foundation should be slightly wider than the walls so that there is enough "reserve" for the facade finishing. Fourth: the type of tape reinforcement. The gap between the longitudinal rods is at least 200 mm, so the amount of longitudinal reinforcement directly affects the width of the tape. The sixth factor is the calculated loads on the base and, finally, the area of ​​​​the foundation sole. Do you want to calculate the foundation with your own hands? First of all, you will need SP (code of practice) and SNiP. The calculation of the bearing capacity is carried out in cases where it is assumed that the foundation will experience large horizontal loads. For example, if a basement, cellar or retaining walls are planned. The site has rocky or heaving soil, or the site itself has significant differences in height. The calculation of deformations is carried out in order to determine the permissible limit of foundation displacement, at which the house is safe to operate. Here we take into account possible subsidence, subsidence, settlement, rise, failure and horizontal displacement of our foundation. By the way, SNiP specifies the minimum widths of strip foundations. For lightweight summer cottages, this is 30 cm. For a two-story cottage - already 50 cm. For three floors - 65. In this case, the minimum value plus 15% on top is considered the optimal width. For reliability, you can lay more, but this will lead to an increase in the cost of the foundation. And the main thing here is not to overdo it: weak soils may not withstand the weight of the foundation and then the entire structure will subside. Another important issue: the width of the sole when constructing a T-shaped strip. We talked about it in detail in this issue. So, for reliability and uniform distribution of the weight of the foundation, the sole should be wider than the strip itself, preferably 2 times. And in loose and sandy soils and even more. The height of the sole is usually about 30 cm. And now let's move on to how to calculate the required width of the foundation. We estimate: the height of the foundation, the material of the basement, the presence of a basement and the area of ​​the foundation. It would also be useful to make a list of materials for waterproofing, thermal insulation, interior and exterior finishing, etc. It is necessary to sum up the specific gravity of the materials; this data will be needed to determine the load on the foundation. Next, we calculate the combined load on the foundation. It consists of the sum of the mass of materials, the useful and snow load. We add up the mass of load-bearing and internal walls, floors, floor materials, ceilings, rafters, roofing, internal elements, insulation, the approximate mass of the foundation and base. Next, we take a house plan indicating its area, number of storeys, thickness of walls and floors, all internal and external architectural elements. All data on the mass of materials is in SNiPs. You can see the average figures on the screen. The total mass is calculated by multiplying the specific gravity by the area or volume occupied by the material. After that, the useful load is calculated, that is, the total weight of furniture, equipment and people. On average, this value is 180 kg/m2. This value is multiplied by the area of ​​the house - and you get the useful load. Watch this video: • Width of strip foundation What... ➤ Our website: https://buildup.ru/