Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Lateral Bracing in ETABS

Lateral Bracing in ETABS

Lateral Bracing in ETABS

When we are designing a steel structure in ETABS, I see that we can assign lateral bracing to the main beams supported by secondary beams. Should we always assign this property to the floor beams? What is the significance of assigning this lateral bracing? How can we be assured that the secondary beams provide enough lateral bracing and prevent lateral torsional buckling of those primary beams?

RE: Lateral Bracing in ETABS

I tried to use this feature a few years ago and gave up because it kept giving weird results. Thus, test it out on some easy cases to make sure you agree with its calcs. For a typical floor beam with positive moment and connection to the deck/slab, the unbraced length is typically zero so these checks might not apply.

The AISC Specification Appendix 6 provides equations for the required strength and stiffness of braces. I'd recommend checking it out. You might also find an old copy online of the Yuga and Helwig stability bracing seminars from a few years ago, probably about 2005.

RE: Lateral Bracing in ETABS

If we would like to assign this property to the floor beams, should we do like below? (as an example)

1) ...\ Lateral Bracing \ Specify Uniform Bracing \ 0 to 1 : Top (Because the main beam is braced with deck and secondary beams on top) (I assume that secondary beams are much smaller than the main beam.)

2) ... \ Lateral Bracing \ Specify Point Bracing \ 0.5 : Bottom (I assume that the bottom flange is braced with another member (not secondary beams)in the middle)


Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close