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Anonymous Poster

Column Deflection

06/13/2010 8:17 AM

We have one tall column of 41 Meter Hight and two dia meter of 2.2 and 3.5 meter.

We are facing deflection at the top of column. So what will be the limit for allowable diflection at top.

Which code say about the permissible limit of deflection at top of column?
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not so smart
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Join Date: Dec 2008
Location: nj,usa
Posts: 1253
Good Answers: 33
#1

Re: Column

06/13/2010 8:18 AM

What country are you in?

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Anonymous Poster
#3
In reply to #1

Re: Column

06/13/2010 8:32 AM

We are in Saudi Arabia ?
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passingtongreen
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Join Date: Aug 2009
Location: Glen Mills, PA.
Posts: 2385
Good Answers: 114
#2

Re: Column

06/13/2010 8:20 AM

What are these columns, are they refinery vessels? chimneys? Which country's codes do you use?

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Anonymous Poster
#4
In reply to #2

Re: Column

06/13/2010 8:33 AM

This column is Solvent Recovery column in our Benzene tolune xylene plant at saudi arabia
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PennPiper
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Engineering Fields - Piping Design Engineering - Retired Piper

Join Date: Feb 2007
Location: Bayonet Point, Florida
Posts: 635
Good Answers: 61
#5

Re: Column

06/13/2010 9:11 AM

Is the "Deflection" the result of thermal expansion on one side of the column due to solar radiation?

If so, have you thought about adding "Insulation with a Reflective Cover"?

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ba/ael
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Join Date: Nov 2007
Location: Sherwood Park, Alberta, Canada
Posts: 1212
Good Answers: 74
#6

Re: Column Deflection

06/13/2010 2:30 PM

The Canadian Institute of Steel Construction, CISC recommends h/400 for buildings. In your case, that would be 102 mm lateral deflection but if the connected material is sensitive to large deformations, you may wish to reduce that to a more acceptable value.

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Anonymous Poster (2); ba/ael (1); not so smart (1); passingtongreen (1); PennPiper (1)

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