Wind Pressures on Louvers
Wind Pressures on Louvers
(OP)
Hello out there.
I am currently trying to solve a problem with a rooftop mechanical screen. Long story short, we are committed to a roof screen system (panels, frames, connections to structure, etc) that is not adequate to resist full code level wind pressures on solid panels. Thus, we are looking to switch to louvered panels to reduce the pressures and make our system a viable option.
ASCE 7-05 section 6.5.2.2 states full wind pressures shall be used "unless approved test data or recognized literature demonstrate lower loads for the type of air permeable cladding being considered".
Thus, I am in need of some testing or reports that address wind pressures on louvered systems. So far I tracked down information from the company 'Architectural Louvers' that offers reduction coefficients for their specific louvers, but I am looking for something with broader application so that I am not tied to one louver manufacturer. Any input or references you have is greatly appreciated.
Thank You!
-Mike
www.archlouvers.com/Equipment_Screens.htm
I am currently trying to solve a problem with a rooftop mechanical screen. Long story short, we are committed to a roof screen system (panels, frames, connections to structure, etc) that is not adequate to resist full code level wind pressures on solid panels. Thus, we are looking to switch to louvered panels to reduce the pressures and make our system a viable option.
ASCE 7-05 section 6.5.2.2 states full wind pressures shall be used "unless approved test data or recognized literature demonstrate lower loads for the type of air permeable cladding being considered".
Thus, I am in need of some testing or reports that address wind pressures on louvered systems. So far I tracked down information from the company 'Architectural Louvers' that offers reduction coefficients for their specific louvers, but I am looking for something with broader application so that I am not tied to one louver manufacturer. Any input or references you have is greatly appreciated.
Thank You!
-Mike
www.archlouvers.com/Equipment_Screens.htm






RE: Wind Pressures on Louvers
I have designed some large "louver" systems where the individual louver blades had to act as structural members.
If your louvers have screens behind them, then you'll have to design as air permeable cladding.
RE: Wind Pressures on Louvers
RE: Wind Pressures on Louvers
If they are moveable, the assembly will have to be designed as a solid wall as they can be closed as well as open. Worst case scenario governs.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Wind Pressures on Louvers