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

Answer

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.
 

Example:

LC1 → Permanent

LC2 → Permanent/Imposed

LC3 → Live load 1

LC4 → Live load 2

 
Result

 

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

Keywords

Permanent/Imposed Action category 1.C Load combination

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