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In SCIA Engineer, for calculation of limit slenderness it is used creep ratio loaded from concrete setting (if member data is not defined ) or concrete member data, see "Concrete settings (structure)" . It means that if user wants to take into account effective creep ratio according to clause 5.8.4 in EN 1992-1-1, the value of this creep ratio has to be directly input to concrete setting or to concrete member data as "User value of creep coefficient". Otherwise, the final creep ratio will be taken into account.
The coefficient A is than calculated according to formula :
A = 1 / (1 + 0,2 ∙ φ)
where
| φ | is creep ratio loaded from concrete setting (if concrete member data is not defined on column) or concrete member data |