Structural design of roof curbs

[awa5114]

I am looking for resources that can help me learn more about structural design of roof curbs and attachments for HVAC equipment. I am often involved in design of these elements for seismic, wind and gravity loads.

I need a proper, conscientious approach to determine realistic loads/stresses on roof curb members and anchorage. So far I have been using basic dumbed down versions of statics which is just no good. I am having serious concerns about the accuracy of the numbers I'm coming up with. These are clearly not structurally determinate systems with well defined boundary conditions, so why should we model them as such?

 

[SlideRuleEra]

See this Thread: Link

http://www.SlideRuleEra.net

http://www.VacuumTubeEra.net

 

[TehMightyEngineer]

Hah hah, that's his thread SRE. Though SRE is correct that you might be better off just replying in that original thread.

Professional and Structural Engineer (ME, NH, MA)
American Concrete Industries

http://www.americanconcrete.com

 

[awa5114]

Hey TehMightyEngineer,

The reason I discontinued that thread is that I was somewhat convinced that the article in question would not bring any light to the issue. It seems the author is proposing a "Static analysis" approach (basically just dumbed down statics for what otherwise seems to be a more complicated structural system). I am arguing that this is overly simplistic and does not result in accurate enough loads. So, short of developing an FEM model (which I cannot do .... yet...) I'm really lost about how to determine these loads/stresses