Materials, Coefficients, Notation
The following notation for material parameters is used:
specified compressive strength of concrete
modulus of elasticity of concrete at 28 days
lower characteristic yield strength of reinforcing steel
The characteristic compressive strength of concrete is the basic input parameter given by the class of concrete.
The most common notation for geometrical parameters:
effective depth of cross-section
lever arm (arm of internal forces)
All computations are carried out according to the theory of limit states.