Spacer "star" for reinforcement: dimensions, purpose

To implement the goal of improving the quality of reinforced concrete products, there are many methods. And it's quite difficult to do this. In the end, in the finished element or overlap, the reinforcement must be evenly and correctly positioned.

However, without the use of special devices to achieve this is difficult, so builders try to use not only experience, but also tricks to get a high-quality result. For this, it is customary to use improvised means for leveling the level of the reinforcement. An asterisk "asterisk" can help to facilitate this process.

Purpose of the lock

Fixators for the correct positioning of reinforcement in the future design are an expendable material, which is made in the form of fasteners or stand for rods. These products are made of different materials, but the most common are plastic and metal. Clamps are used for:

• Creation of formwork;
• Reinforcement of the foundation;
• Monolithic construction.

Features of plastic locks in the form of an asterisk

Plastic lock "star" is often compared with a metal analog. The first variety has many advantages because the material does not react with water, which performs an important function as concrete products. Among other things, plastic is cheaper compared to metal counterparts. Such products have one more feature, expressed in flexibility. If the products have changed their shape or size with temperature changes during the year or with other influences, the material will be able to recover its shape and not lose its characteristics.

In addition, the purpose of the "star" lock and the features of the product

The "star" lock is used for the vertical fastening of the frame. Inside the element is a metal rod, while the product itself is fixed on a vertical base or wall.

It is indispensable for such a fixator to form concrete monolithic constructions of impressive thickness. In appearance, the element resembles a wheel or an asterisk, and in its design there are springs that provide reinforcement of reinforcement of different diameters. That's why the "stars" are considered universal.

Latch dimensions

The sprocket "sprocket" (50 mm) is a product that is capable of providing a reliable fastening of the reinforcement in the protective layer of concrete of the greatest thickness. This value indicates the diameter of the product, while the minimum parameter is 15 mm. On sale, you can find several sizes of such products with different diameters. The required variety is selected taking into account the diameter of the reinforcement and the thickness of the protective layer. The retainer for the star-shaped fittings can be used with rods with thicknesses ranging from 4 to 32 mm. At 1 m ² will need about 5-10 pieces of such latches.

Tips for choosing a fixative

The lock of a protective layer "asterisk" should not fly off from armature at concrete pouring. For this, it is installed on a horizontal reinforcement. In order to make the right choice, you should pay attention to some of the nuances. For example, the material in the product should be uniform, like the color of the lock. In addition, the structure should not be streaked, otherwise it will indicate a poor quality of the product, which in the end can cause brittleness. On how good the locks and what rigidity the body has, the fixer design will depend. The body must be marked, which will allow you to find out the size of the product and the parameters of the protective layer, as well as the diameter of the reinforcement.

Zvezdochka with a two-plate lock

The "star" lock can have a lock of two plates. Such products are considered universal, but no longer able to meet the requirements of modern construction. This is due to the fact that the enclosure in this case is not tight enough, and this can cause a breakage of the lock during attachment.

This "star" behaves badly enough under the influence of low temperatures, which is especially true for a small number of stiffeners. In this case, the products are jammed, which leads to non-compliance with the parameters of the protective layer. Due to the fact that the design has the described locking connection, two plates can not be reliably fixed to the armature because during pouring it is under high pressure, and subsequently the "star" simply flies. In order to achieve reliability when using such fasteners, it is necessary to use them in a more impressive amount in comparison with those "asterisks" that have locking connections of a different type. This can cause additional costs.

Asterisks F33

The "sprocket" lock (25 mm) can be marked with F33. This indicates that in front of you a product with a homogeneous casing that has an optimal stiffness. This design has more ribs, and the lock has only one plate. Stiffness is achieved not by the density of the material, but by the number of ribs that exclude deformation. Such asterisks can be fixed on the armature, the diameter of which varies from 4 to 20 mm. The material in the base is more qualitative, therefore it does not perceive the effect of temperature changes.

Lock "star" with U-shaped petals

There is another type of fasteners. On sale, you can find a fixator for the armature with petals in the form of a letter P. Typically, these products are used to form a 50-mm protective layer. The design is asymmetric, and it can be used in the production of the basement and foundation part of the building. Due to the presence of petals, when pouring concrete, the waterproofing will not be damaged.

Petals have a huge number of stiffeners that can undergo stress. This product on the market is considered a novelty, and it is also able to solve the problem of the cargo vector. The main advantage is the possibility of creating the same protective layer along the radius due to the asymmetry of the product.

Conclusion

When creating monolithic structures, the formation of the protective layer is one of the important stages. That's why so important is given to simple and cheap products by the type of fasteners. Not so long ago they were replaced with improvised construction debris, which did not allow achieving positive results. Considering the high requirements for monolithic structures and the norms of their erection, the use of these products became mandatory.