Belt foundation for fence: device and calculations

Any building should have a fence that protects the surrounding territory. For its construction can use a variety of materials, for example, wood or metal. In order for the structure to last a long time and have the qualities of reliability, it will be necessary to erect a foundation, only then a dwelling or a building of any other purpose will be reliably protected from prying eyes or unauthorized access.

Depending on what kind of construction the fence will have, you may prefer a certain kind of foundation. The base can be stone, columnar, ribbon or ribbon-columnar. Before the construction of the foundation, it is necessary to make markings on the terrain, as a rule, the plan of the structure is drawn up in advance. Marking must be done around the perimeter, before that you should prepare a rope, which is stretched between the stakes set in the corners.

Preparatory work

If you will build a ribbon foundation for the fence, then you will have to create a reinforced concrete strip, which is laid out along the perimeter. It is necessary to recognize that this particular type of construction is used for fences. However, before starting work, it is necessary to consider all the stages of erecting such a foundation. Initially, a trench is dug out, the depth of which will depend on climatic conditions, structural weight and soil stability. Typically, this parameter varies from 60 to 80 cm, while the width will depend on the thickness of the future fence.

Before the subsequent work, but the bottom of the trench is filled with sand, which is compacted and well watered.

Creation of reinforcing cages

If you create a ribbon foundation for the fence, then the next step is to take care of the installation of reinforcement, it will give a fortress design. Standard rods for this fence should have a cross section of 10 mm, and laying elements should be 5 cm from the bottom of the trench. For the reinforcement, the support is laid for this, and the first two rows of the reinforcement should be equal to the length of the trench, while the elements should not extend to the walls of 7 cm. The transverse components should be placed together with the vertical components, the distance between them is 40 cm. The vertically oriented posts should be lower The top section of the base is approximately 7 cm. The top is fixed with longitudinal bars, and the structure is installed with a knitting wire or by the welding method.

Formwork Creation

The tape foundation under the fence must have a formwork, it will allow to form a concrete base. At this stage, you should use a 25 mm edged board, from which the shields are knocked down. The finished structure should form a box, and the top of the formwork should rise 30 cm or more above the ground surface. In order for the elements to remain in place, spacers should be installed.

Pouring concrete slurry

If you want to build a strip foundation under the fence, then the next step is to start preparing the concrete mix, which is poured into the formwork. In this case, you can take the proportion of 1 to 4, which involves the use of cement and quarry sand. To improve the strength of the composition to the ingredients should be poured rubble or screenings. In the end, you should get a thick mass. To ensure that the soil in the trench does not remove moisture from the mixture, the bottom of the pit should be moistened. After the completion of the filling phase, it should take approximately three days, only after that it is possible to start dismantling the formwork and further constructing the fence.

Recommendations for the construction of a strip foundation

When a ribbon foundation is installed under the fence of profiled sheeting, it is important to remember that the width of the trench should not be less than the thickness of the future fence. The walls of the trench must be as vertical as possible, but if it is a loose soil, they may be at an angle.

When preparing a trench, you need to monitor the level of the site. Thus, the master is recommended to start from a low place, then the depth of the foundation will not be less than the calculated one. At the bottom of the trench, you can pour a layer of rubble, which sometimes replaces the sand. However, in any case, the preparation must be rammed.

Features of the formwork

Pouring the ribbon foundation under the fence should not be carried out with large interruptions, in this case it is possible to encounter the layering of the substrate after drying. However, it is first important to create a formwork correctly, the boards of which are installed along the edges. But if you work with loose soils, the elements are installed on the bottom. In order for the surface to turn smooth, the boards should be strengthened from the outside. To facilitate the dismantling of boards, the bottom and walls from the inside can be covered with polyethylene film. However, such a layer can not be called a reliable waterproofing, but during the ripening of concrete this material will exclude the absorption of moisture by the soil, which will increase the strength characteristics of the base.

Inside the formwork is laid reinforcement, which is used as a corrugated rod. However, to save money when building a light fence, you can use metal scraps, reinforcing mesh or pipes. In those places where the supports or columns will be located, the reinforcement should be carried out strictly according to the rules. They say that the rod should form a three-dimensional structure, which is connected by wire. To increase the strength of columns, you can set the axis of the element from the metal pipe.

Belt-columnar foundation

A ribbon foundation for self-fence can be made with additional use of supports. This design can be used for brick fence, as well as structures that will consist of wood and brick or stone pillars. Sometimes the ribbon-columnar foundation is installed in conjunction with a fence of profiled sheeting. At the first stage, you need to make a markup, dig a trench on it, the width of the latter can vary from 20 to 25 cm, but deepen the base by half a meter. After every three meters, it is necessary to make indentations where the poles will be installed. The width of the pit should be 0.4 m or more, while deepening the elements is necessary below the freezing line of the soil, which is approximately 1.5 m.

If you are thinking about how to make a strip foundation under the fence, which will have support, then instead of the latter you can use metal frames. Columns are installed in pits, and the resulting space is poured with concrete. The verticality of the supports must be controlled with a plumb or level. In the trench should be laid metal reinforcement, the thickness of which can vary from 8 to 12 mm. The concrete is poured into the soil level.

Conclusion

The ribbon foundation of a turnkey fence can be made by professionals, however you will have to pay about 20,000 rubles. Sometimes the cost frightens consumers, so they prefer to do such work themselves.