×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Jobs

Wind drift limitations

Wind drift limitations

Wind drift limitations

(OP)
Is it codified anywhere as to what acceptable wind drift limitations are on a 30' tall agricultural buildings, or any building for that matter? I see acceptable story drift limitations for seismic events, but not for wind. And if not codified, what is an acceptable drift limitation on a building without brittle finishes or mechanical or other systems that would be affected by drifting. What L/? value would be deemed reasonable?

Thanks.

RE: Wind drift limitations

Not sure about agricultural buildings - most codes don't say much about wind drift other than the engineer should take drift, and second order effects into account in all designs.

There was a good article on wind drift in the 1st Quarter, 1993 AISC Journal, titled "Serviceability Limit States Under Wind Load".

This can be purchased for $10 here: http://www.aisc.org/SearchTaxonomy/EngJournal.aspx...

If you are an AISC member it is free. Just fill in the title, 1st Quarter, and 1993 in the search box at the bottom.

It has a full table of drift limit suggested provisions for different types of framing, cladding, etc.

RE: Wind drift limitations

Take a look at AISC Design Guide 3. It recommends using a 10-year wind recurrence interval for determing drift, I doubt you would want to go less than that even if it is an agricultural building.

RE: Wind drift limitations

I think you could use the story drift limitations (seismic) from ASCE based on the type of building, but run lateral loads with a smaller recurrence interval as suggested by j19 for "serviceability" considerations (similar to 0.7xcomponents and cladding in IBC deflection table).

RE: Wind drift limitations

dont know of any code that has specific requirements. i would normally adopt h/150

http://www.nceng.com.au/
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning."

RE: Wind drift limitations

Our office standard for multi-story is H/400 at the center of rigidity, H/300 at the extreme point for a 10-year wind recurrence interval. I would only use H/150 for a warehouse-type facility.

RE: Wind drift limitations

(OP)
Thanks all for your feedback!!

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!


Resources