cold formed steel

[Gk2404]

Can anyone please tell me how can I find maximum allowable stress in circular hollow section of 520 dia. and 1mm thickness Fy = 350 MPa using AS4600?

 

[bugbus]

520 diameter and 1 mm thick?

I would say close to zero.

 

[hokie66]

What would you use this light tube for? I can't think or a structural use. But you could use it for architectural decoration. Ductwork?

 

[human909]

Allowable stress doesn't exist in AS4600.

This is your first post here. If you are going to continue to post, please make sure you ask more informed questions.

 

[GeorgeTheCivilEngineer]

Not even for buckling applications? (I'm British Standards and Eurocode so just as ill-informed on AS4600!)

 

[human909]

I must say that I have not read AS4600 cover to cover so if somebody wants to prove me wrong I welcome it.

The elastic flexural buckling stress is similar though I'm not sure it is identical to 'allowable stress'. I'm not sure that the term allowable stress is even defined in modern AS codes.

The critical stress in AS 4600 come close to being an allowable stress but this still a value without a capacity reduction factor. Add the capacity reduction factor and you have something that could be considered 'allowable stress'. But if you start using that term then it could be confused with other design approaches such as Allowable Stress Design which AS4600 is not.

 

[driftLimiter]

520 diameter and 1 mm thick?

Its ridiculously slender and would be prone to local instabilities under normal structural loading such as shear axial and bending. However it might be useful as a pressure vessel?