The reinforcement cage is designed for the production of reinforced concrete monolithic structures. The device allows you to give rigidity to the structure, taking on tensile and bending loads. The reinforcing cage is also used for the manufacture of the foundation of the building and for the production of reinforced concrete slabs.
There are various types of materials for the implementation of wall reinforcement, road construction, construction of foundations and the manufacture of reinforced concrete products. Depending on the diameter and location of the rods, metal frames are divided into light and heavy.
At the same time, depending on the shape, the structures are divided into reinforcing mesh, flat and spatial. They are round, triangular, T-shaped and square. The type of frame primarily depends on the design of the product. So, a spatial reinforcing cage can be assembled from several flat varieties. Moreover, this transformation can be carried out at the construction site, thereby reducing transportation costs.
Today, the manufacture of structures has shifted mainly from construction sites to factory production workshops. This can significantly increase the strength and quality of products, save time on assembly. Reinforcing frames of buildings represent a connected or welded structure of rods and other elements. In production conditions, the knitting reinforcement is replaced by contact welding.
Billets for the manufacture of products are metal rods, which (depending on the design) are installed transversely and longitudinally. Steel grade is determined by design documents. Depending on the temperature of the environment, metals that are not subjected to cold brittleness are used.
If the products will be operated at temperatures below minus 30, then steel grade BCt5ps2 is used. In the northern regions, rods made of 35GS grade A3 material are used for the manufacture of reinforcing cages . In addition, the degree of weldability of steel should be considered . It is forbidden to thermally harden reinforced reinforcing material and high-strength wire, since the hardening effect will be lost as a result of welding.
Reinforcement for the manufacture of reinforced concrete frame structures is divided into non-metallic and steel according to the material used. According to the production technology - for hot-rolled rod (diameter from 6 to 90 mm) and cold-drawn round wire (diameter from 3 to 8 mm). Products are made in the form of high-strength and ordinary wire, as well as strands and reinforcing ropes.
The reinforcing cage is made of a periodic or round smooth profile. In the first case, the reinforcement has a curved surface, which allows for better adhesion to concrete. According to their purpose, they distinguish designs made of working reinforcement, which mainly accepts tensile stresses, distribution, designed to evenly distribute the load between the rods, as well as mounting, which serves to assemble the frames.