Slenderness of plate

[Keystation]

Hi,

I am a young engineer designing for gusset plates. AISC J4.4 deals with compression of connecting elements. However, if the slenderness is over 25, it says to apply chapter E. How do you apply chapter E for plates exactly? Table E1.1 shows limit states for each cross sections but I don't know if the plate is slender or not. Would there be a section or equation I can refer to calculate slenderness of plate?

 

[HTURKAK]

Pls look Whitmore buckling check .

There are worked examples at (Design Examples Based on the AISC Manual -Structural Steel Educational Council)

 

[271828]

The AISC Design Guide 29 has a lot of examples. This check is probably included in several of them.

 

[271828]

Design Guide 29, Example 5.3, Pages 103 and 104 show what to do when KL/r > 25. Check it out. If you're an AISC member, you can get the PDF for free at www.aisc.org/dg.

In a nutshell:
1. Computer KL/r
2. If KL/r > 25, then compute Fe from Eq. E3-4.
3. Calculate Fn from either Eq. E3-2 or E3-3.
4. Calculate Pn = Fn * A. Often, A must be computed for the Whitmore section, which is described at the first of the Manual Part 9.

 

[Keystation]

Thank you so much everyone! This is super helpful