6 Replies Latest reply on Nov 26, 2008 12:55 PM by sandeep pawar

Structural Member to sheetmetal

sandeep pawar Nov 21, 2008 4:47 PM

Hi,

I want to replace a structural member, say an MC Channel, with a formed sheetmetal. If the material properties & the section modulus of two pieces are equal, can I safely say that the I can replace the MC channel with sheetmetal?

Do I need to compare any other properties other than material and section modulus?

Any advice will be appreciated.
Thanks,
Sandeep

Structural Member to sheetmetal

Bill McEachern Nov 21, 2008 4:53 PM (in response to sandeep pawar)

I would suggest that you need to ensure it has adequate buckling margin.
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  sandeep pawar Nov 21, 2008 4:56 PM (in response to Bill McEachern)
  
  Thanks for your reply.
  Buckling margin? Could you please elaborate on that, if possible?
  
  Thanks,
  Sandeep
  
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    sandeep pawar Nov 24, 2008 8:33 PM (in response to sandeep pawar)
    
    HELP !!!!
    
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Garrett Brooks Nov 26, 2008 12:13 PM (in response to sandeep pawar)

I am not an engineer, but I would think you would need a piece of sheet metal almost as thick or as thick as the flange area on the MC-channel to get the same structural properties in the direction the channel would normally see a force. Then the web area would be much thicker than on the MC-channel making it heavier over all.

just my 2 cents
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  Vince Adams Nov 26, 2008 12:45 PM (in response to Garrett Brooks)
  
  Hi Sandeep, the best answer to this question is... "It depends."
  
  If your C Channel is loaded prefectly parallel to the 'legs' only, matching the section modulus should be sufficient. However, for any other loading, (torsion or side loading), you should run the two sections thru Simulation to verify the response.
  
  To Bill's point, running a Buckling study using both designs and the anticipated loading, you should see a similar buckling load factor (the primary output from a buckling study). Hopefully they are both greater than 2 or 3.
  
  Good luck!
  
  Vince
  
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    sandeep pawar Nov 26, 2008 12:55 PM (in response to Vince Adams)
    
    Thanks Bill, Garrett and Vince. Looking at your answers, I think I was going in right direction.
    
    Thanks a ton.
    
    ~Sandeep
    
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