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İnternational Design Codes

ACI 318-19 : Concrete Column Design

TSC 2018 : Column Design.

Notation in ACI 318-19

Ec = modulus of elasticity of concrete, psi
Es = modulus of elasticity of reinforcement, psi
fc' = specified compressive strength of concrete, psi
fy = specified yield strength for nonprestressed reinforcement, psi