metal building wind load (open on 2 sides)
metal building wind load (open on 2 sides)
(OP)
Hi all,
I am having trouble figuring out how to get started on finding the wind loads (from ASCE 7-10) for a metal building open on 2 sides. The configuration looks something like the picture from Google that I've attached. The diagonal cases seem particularly weird, and I wasn't sure how to treat the enclosure classification. I was wondering if anyone could give me some tips on starting this. For my (very) preliminary design, I'm planning on considering only the horizontal direction and treating the building as if it were enclosed. I know I will need to consider internal pressures and uplift forces, and was hoping for a few tips. Thanks!
http://files.engineering.com/getfile.aspx?folder=2...
I am having trouble figuring out how to get started on finding the wind loads (from ASCE 7-10) for a metal building open on 2 sides. The configuration looks something like the picture from Google that I've attached. The diagonal cases seem particularly weird, and I wasn't sure how to treat the enclosure classification. I was wondering if anyone could give me some tips on starting this. For my (very) preliminary design, I'm planning on considering only the horizontal direction and treating the building as if it were enclosed. I know I will need to consider internal pressures and uplift forces, and was hoping for a few tips. Thanks!
http://files.engineering.com/getfile.aspx?folder=2...






RE: metal building wind load (open on 2 sides)
Go through the calculations from section 26.2.
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RE: metal building wind load (open on 2 sides)
RE: metal building wind load (open on 2 sides)
RE: metal building wind load (open on 2 sides)
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RE: metal building wind load (open on 2 sides)
RE: metal building wind load (open on 2 sides)
WIND PERPENDICULAR TO OPENING
Depending on the dimensions of the bldg, I could see the windward wall coming close to acting similar to freestanding signs(Cd=2.0 approx) and leeward wall with Cd=0.6.
For roof I would use the myriad examples found in the ASCE code w/o internal press.
WIND PARALLEL TO OPENING.
EMPTY CONDITION: Depending on the length of the bldg ,I could envision boundary layer buildup that would have a choking effect on the air moving thru the bldg....what to use?..maybe the 0.55 already mentioned.
In the occupied condition and depending on what is stored there, one could definitely see air blockage which could result in say the 0.55 already mentioned.
WIND @ 45
Again depending on the dimensions of the bldg, one could have a combination of all of the above.
I guess where all this is heading is that the OP should investigate the differnt wind direction vectors and based on the dimensions of the bldg determine in his own engineering judgement what wind condition might apply and may only exist on a portion of the bldg...given the multiple possible wind loading cases I would usually go consrvative and move on....