Wind Loading on Clerestory Addition

[Shaylon]

Hello all,

Currently I am working on adding a clerestory to an existing PFMB at a rodeo arena. I am a little stumped on how to do my wind loading calcs. Initially, I have analyzed the building as it stands to know what my capacities are. But now that I am moving on and am trying to determine what additional wind loading would be added to the existing frames I am not sure where to go. Do I treat the clerestory as rooftop equipment? Completely re-analyze the structure or just what exactly? Please see attached image for cross section of new addition. The clerestory is as shown in section and runs the full length of the building (410'+/-). Any input is greatly appreciated.

Shaylon

 

[JAE]

For that I would be tempted to use the ASCE 7 provisions for rooftop equipment - it's the most similar condition.

 

[ron9876]

Like many conditions this isn't really covered in ASCE7. I would probably use wall loads on the walls and roof loads on the roof. I am assuming that the addition is full length not a smaller localized element. If small then rooftop equipment is likely best.

 

[Ron]

Since you are attaching to an existing structure, there's no reason that this should not be treated as "equipment" as JAE noted. That's probably slightly more conservative than analyzing as an original feature in composite to the structure, but a hell of a lot easier to analyze.

 

[a2mfk]

I may run two quick wind calcs, one for rooftop equipment like already suggested, and another treating the clerestory as a normal enclosed building using the height off the ground (z) to determine the wind speeds.

Is the main rodeo building enclosed, partially enclosed or open? Will the roof be opened up at the clerestory to let light in, which is I assume the whole point?

 

[Shaylon]

The building will be an enclosed building and yes, the roof at the existing building will be opened up at the clerestory.

 

[a2mfk]

OK, simpler then it being partially enclosed or open and then you open up the roof. Which methods did you go with, what was worse?