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RE: FOS for von-Mises stress criteria

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      The short answer is I have always used .75 Fy as long as the membrane forces Nx and Ny are small.  If Nx or Ny produce stress large then 5 or 10 ksi for steel I look at stability issues.  I base this on weak axis bending of plates (F2.1) per the ninth edition of AISC manual.
Acie Chance
-----Original Message-----
From: Arun Sarkar [mailto:arunjyotisarkar2002(--nospam--at)]
Sent: Friday, January 13, 2006 7:04 AM
To: seaint(--nospam--at)
Subject: FOS for von-Mises stress criteria

hi all,
can anyone suggest what factor of safety (for structural steel) should be used when the checking criteria is von-Mises stress ?

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