Wind load on open structure

[bylar]

How do you handle the wind on an open structure such as a Gazebo or open porch attached to a residentail structure?
ANSI/ASCE only addresses open structure with monoslope roof.
Does anyone know of available reference material on the web??

 

[UcfSE]

ASCE 7-05 has updated much of the material on open structures compared to 7-02 and now includes components and cladding as well as main wind pressures.

 

[mjl23]

The Guide to Wind Loads on Structures has an example of an open porch attached to a residence. The primary structure (enclosed) is the basis for calculating the wind pressures on the porch in that reference.

 

[minorchord2000]

mjl:

To which Guide are you referring? Where is it?

 

[bylar]

Thanks for the response

UcfSE
NC is still using th 02 version
mjl23 that doesn't seem right the enclose structure is less than a partially closed structure and should be way less than a completly open structure

 

[mjl23]

Depends what you are looking at I guess. If the porch is attached to the enclosed structure and shares a common roof line, wind flowing over the house and then leeward over the porch doesn't know if the porch is enclosed or not. On the windward side I think the porch would be similar to a roof overhang, so it gets positive pressures on the underside and negative pressures on the top side.

But don't take my word for it, check for yourself: "Guide to the Use of the Wind Load Provisions of ASCE 7-02"

https://www.asce.org/bookstore/book.cfm?book=4082

I don't think it matters if you reference 7-05 instead of 7-02. I think the basic principles in 7-05 are the same as 7-02, I think more tables for other structures were added, etc.

 

[minorchord2000]

mjl:

Thanks for the link to that book.