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The calculation of concrete components (concrete) involves the dimensioning and analysis of structural elements in reinforced (or simple) concrete, such as beams, slabs, columns, foundations and others. The objective is to ensure that these elements can withstand the loads and efforts to which they will be subjected, safely and durably. Here is an overview of how to calculate the main components of a concrete structure, based on design standards such as Eurocode 2 or Rebap 1. Concrete Composition: Concrete is a mixture of cement, aggregates (gravel and sand), water and, in some cases, additives. The strength of concrete is usually determined by its compressive strength, specified in MPa (megapascals). The most common classes are C25/30, C30/37, etc., where the first number indicates the compressive strength of the cylinder and the second, of the cube.