Armature

Reinforcement is a set of interconnected elements that, when working together with concrete in reinforced concrete structures, perceive tensile stresses (beams), and can also be used to reinforce concrete in a compressed zone (columns).

Reinforcement elements are divided into rigid (rolled I - beams , channels , angles) and flexible (individual bars of a smooth and periodic profile, as well as welded or knitted meshes and frames). Reinforcing rods can be steel (hot - rolled steel for reinforcing reinforced concrete structures ^[1] ), composite , wood ( bamboo ), etc.

The fittings, depending on the mechanical properties, according to GOST 5781 - 82 are divided into classes: A - I (A240), A - II (A300), A - III (A400), A - IV (A600), A - V (A800), A - VI (A1000). Reinforcement class A - I (A240) is made smooth, samples of other classes are made with a periodic profile.