One of the most popular types of building support is a strip foundation. It is a concrete strip placed under the walls around the perimeter of the house. As a result, the weight of the structure is evenly distributed on the ground. Such a foundation prevents subsidence and deformation of the structure. The building acquires the necessary stability. Due to its simplicity and efficiency, strip foundations are used very widely. It is used in the construction of residential buildings and industrial structures.
For what purpose are reinforcement added to the foundation
Reinforcement are metal rods or rods. When added, the strength of the concrete structure and resistance to loads increases. The reinforcement is located vertically and horizontally in the strip foundation. As a result, a reinforcement mesh is formed.
Metal rods located inside the strip foundation significantly reduce the likelihood of deformation of the concrete structure, therefore reducing the risk of cracks. Due to the reinforcement, the structure acquires additional rigidity and can withstand greater loads.
Concrete can easily withstand high compressive loads. Concrete's resistance to bending and stretching is much weaker. This disadvantage can be compensated for with the help of fittings. Reinforced concrete resists such external loads much better.
When choosing the size and type of reinforcement, the following factors are taken into account:
weight and dimensions of the building ;
type of soil;
climatic features of the region;
planned operating loads.
The diameter of the rods in a strip foundation is usually 10-25 mm. Individual rods are connected by welding or tied with ties. Adding reinforcement to a concrete structure can effectively solve strength and stability problems. As a result, the service life of the erected structures increases.
Types of reinforcement for strip foundations
Most often, corrugated reinforcement is used in strip foundations. The rods have transverse ribs at equal distances. Such ribs increase the adhesion of the corrugated rods to the concrete and increase the strength of the structure. The following advantages of corrugated reinforcement can be noted:
Minimum probability of slipping. The ribs securely fix the metal rods inside the reinforced concrete structure.
Increasing flexibility. Steel rods perfectly withstand lateral loads and vibration.
Easy installation. It is easy to make a frame from corrugated reinforcement using tying wire or by welding. Such a frame does not deform for a long time.
Methods of tying reinforcement
For a strip foundation, tie the reinforcement possible in various ways. All of them allow you to obtain a durable structure and eliminate possible deformations. The following methods are most often used:
Hand knitting. This method is very labor-intensive, so it is rarely used when creating large foundations. First, metal rods are placed according to the selected project. They are located in the longitudinal and transverse directions. Then, at the intersection points, the rods are tied using steel twine or wire. To successfully use hand knitting, you must have certain skills.
Use of pre-prepared mesh from reinforcement. To speed up the reinforcement process, you can lay ready-made meshes of metal rods on the base of the foundation. Individual sections of reinforcing mesh consist of metal rods connected to each other using wire. Sections can have different shapes and sizes, which simplifies the adaptation of the design to the finished project. Individual sections are tied together with staples or wire.
Use of threaded rods. Such fittings are installed in the required position and secured to the base using steel plates or nuts. As a result, the reinforcing bars are securely fixed and ensure the stability of the foundation.
The choice of reinforcement tying method primarily depends on the design requirements and size of the object. The final decision is also influenced by the experience of the builders and the availability of necessary materials. To build a high-quality strip foundation, it is necessary to strictly follow the rules for working with reinforcement.
Calculation of reinforcement
An important step in creating a strip foundation is the calculation of the required amount of reinforcement. The calculation is carried out in the following order:
Determination of loads. The amount of reinforcement depends on the future loads on the foundation of the house. Vertical loads include the weight of the building plus its contents. You also need to add the probable snow load
