Incorrect section column

[Anonymous]

Hi Team,

 I am designing a framed structure as shown in the Picture.The Bar no 1382 and 1381 are having Section L90 x 90 x8. I am designing these members using Euro code. For Member 1379  1380 & 1382 are described as Class 1 whereas for 1381 is shown as  Class 4. 

As per Euro code, Angle sections will fall under class 3 or 4. Could you please clarify this. and how for a similar section different class types can be defined?

[Artur.Kosakowski]

Hi @Anonymous

Could you attach your Robot model?

[Anonymous]

Hi Artur,

PFA the Robot File.

[Anonymous]

Hi Artur,

Can I get some response for this please.

[Artur.Kosakowski]

Hi @Anonymous

If I remember correctly EC3 for angles provides only the limit for class 4. In Robot it is assumed that when an angle is below this limit it is of class 1. If you want it to be of class 3 mark the indicated option while running verification for it

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[Anonymous]

Hi Artur,

Still , could you let me know how for a same cross section, two different class is defined.

Bar 1379 - Class 1  and Bar 1381 - Class 4.

If you follow ur instruction as above to perform elastic analysis ,

Bar 1379 - class 3 and Bar 1381 - Class 4.

as both the bars are having same cross section and same property, they should fall in same class. Isn't it?

[Artur.Kosakowski]

Hi @Anonymous

The option I indicated forces the elastic approach (class 3) for section that without having it marked would be calculated as class 1. In other words you may deliberately decide not to allow for plasticity. 

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.