ASCE 7-05 Wind Loads Question

[Decartes]

Does anyone know, what part of ASCE 7-05 addresses/is applicable to the design wind load on an outdoor structure w/ a Gable Roof supported by one column? You heard me correct "one" column.

 

[MiketheEngineer]

I would probably use a "sign post" analysis - just assume that the gable is a big sign??

 

[Decartes]

@MiketheEngineer, how would you then account for the uplift/downward pressures on the roof? Do you think ASCE 7-05, 6.5.13 or 6.5.15 would apply?

 

[JAE]

I think the shape of the roof is more important than the number of columns.

 

[RobertHale]

I would agree with JAE. The Cn values account for the aerodynamic shape of the roof. The negative values of Cn will generate your uplift. I would think it is important to keep the cases distinct to capture the overturning moment at the top of the column, as well as applying Figure 6-9 to generate torsional moments on the column.

 

[Decartes]

@ JAE and RobertHale, I agree with both of you, ASCE 7-05 Sect. 6.13 applies, because the roof of the open structure is a critical design feature. Thanks to all who replied so far, I really appreciate it.