Wind drift limitations

[PostFrameSE]

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.

 

[JAE]

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?id=7806

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.

 

[j19]

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.

 

[bouk715]

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).

 

[rowingengineer]

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."

 

[steellion]

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.

 

[PostFrameSE]

Thanks all for your feedback!!