What effect on the design effect has the classification of loads into the action category Gq Permanent / Imposed (1.C)?


The "Permanent/Payload" action category was created as a result of customer requirements. It is not part of EN 1990.

This allows you to consider the permanent live loads, such as floor structure or similar, with the partial safety factor 1.35 instead of 1.5.

All combinations are generated once without this "Permanent/Imposed" load case and once with this load case.


LC1 → Permanent

LC2 → Permanent/Imposed

LC3 → Live load 1

LC4 → Live load 2



CO1 → 1.35*LC1


CO2 → 1.35*LC1 + 1.35*LC2


CO3 → 1.35*LC1 + 1.5*LC3


CO4 → 1.35*LC1 + 1.5*LC3 + 1.5*LC4


CO5 → 1.35*LC1 + 1.5*LC4


CO6 → 1.35*LC1 + 1.35*LC2 + 1.5*LC3


CO7 → 1.35*LC1 + 1.35*LC2 + 1.5*LC3 + 1.5*LC4


CO8 → 1.35*LC1 + 1.35*LC2 + 1.5*LC4


Permanent/Imposed Action category 1.C Load combination

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