Maximum Deflection/Drift Due to wind 1

[SKJ25POL]

Can anyone direct me where I can find some information about the maximum allowable deflection of a Structure due to wind loads?

What is a limit for tall buildings? What code and where in the code reference this?
There ia a tall building and in a windy day people claim they feel the motion, how do I check if this drift is within the allowable limits?

I have seen limilts for Component and Clading but not for overall structure or floor drift?

Thank you for your direction in advance

 

[jayrod12]

North of the 49 I believe the code allowable drifts are h/500 for each storey and somewhere between h/250 to h/1000 for whole building (depending on the construction method). The move is towards more flexible structures because the higher strength materials don't necessarily mean stiffer structures.

 

[KootK]

Where do the 250/1000 numbers come from jayrod? We're countrymen; I must know.

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.

 

[jayrod12]

Haha, Structural Commentary I paragraph 74. under Lateral Deflection of Tall Buildings. To be fair I've never used anything other than the h/500 storey height and the h/400 total building that is outlined in the steel design manual annex d.

 

[JAE]

See if this attached article helps you (AISC article from AISC Engineering Journal.

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[SKJ25POL]

jayrod12,
May I ask,"Structural Commentary I paragraph 74" which code? ACI, ASCI, ASCE?
Did you mean page 74?

Also," h/500 storey height and the h/400 total building that is outlined in the steel design manual annex d."This is in what edition of Steel manual?
Did you mean AISC?

I appreciate more clarity if your intention is helping
Thank you very much

 

[jayrod12]

Sorry. NBCC structural commentaries. It's a separate attachment to the National Building Code of Canada. That post was more directed at KootK. I assumed you were in the states and as such likely wouldn't require that info. My apologies.

That is the CISC Handbook of Steel Construction and it's actually a part of CSA S16-09 the governing steel design code in Canada.

The link JAE put up is basically the same wording (In my opinion it's wordier but that's my experience when comparing American and Canadian Codes) under the Building Drift heading on page 2.

 

[jguer005]

If you are looking for the reference in the AISC Steel Manual, in my 14th Edition, it is on page 16.1-441 under Section L4.

 

[SteelPE]

How tall is your tall building? If you read through JAE's attachment you will find that limiting to drift (to say H/500) may not solve your perception problem that your are having.