Section Definition

[TSOFA]

Hi all,

I have to reinforce a steel roof structure and I will weld 2UPN50 to a tubular 60X40X2. The strange thing is that when I will have to catigorize the section (see pic), the results get different when I pick the first or the second choise. The problem is that this kind of section doesn't belong to one of the available categories of software

 

[Rafacascudo]

The category type is only important if you want to design it.

Main Section properties ,A , J , should be the same on both categories.

[TSOFA]

But the whole scope is to design it. 

[Nicolas.Ratel]

Hi,

You have to classify this section by yourself, there is not typical design for it. 

If you want to be conservative, take "u".

After that you use §6.3 EC3-1-1 to check instabilities. 

Best regards,

NR.

[TSOFA]

ok, so this is something that the designer should deside, eventhough I thing is a little "dangerous". Is there a module to calculate §6.3 EC3-1-1 ?

[Nicolas.Ratel]

Hi,

No for me it's always safety to check the design by hand calculation, and compare if you are ok with the software.

Of course RSA do that  :

Best regards,

NR.