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002341
2017-12-01

Question

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

Answer:

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

This allows you to consider 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

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