when is it acceptable to disregard the omega factor in the steel manual

[NaderLabib]

the structural behavior of a ladder-like element and is it subject to continuous lateral torsional?

 

[phamENG]

What?

 

[ChorasDen]

See this post, has a bit more context.

https://www.eng-tips.com/viewthread.cfm?qid=511246

 

[phamENG]

No way to know without seeing the ladder, but I would guess it is subject to lateral torsional buckling and no, you can't ignore omega. Unless you're using LRFD, in which case you need to use phi. And make sure your load combos match the methodology you're using.

 

[Lomarandil]

I'm just repeating pham here, but for emphasis

I am working on checking single angles per the steel manual chapter 16 section F10.2. it states that it is for a single angle without continuous lateral-torsional restraint along the length. So would a ladder be equal to a continuous lateral-torsional? and can I neglect the use of omega at all?

Agreed, most ladders will not have continuous lateral-torsional restraint along the length. The ladder rungs certainly would not provide that restraint.

And no, you cannot ignore Omega (for ASD design)

 

[phamENG]

Thanks, Lo. My communication skills seem to be lacking of late, so I appreciate the assist!

 

[NaderLabib]

I am sorry for not explaining the question well. Thank you for your answers. They were helpful!