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Home > Forums > Engineering Codes, Standards & Certifications > Engineering Codes, Standards & Certifications > ASCE (civil) Code Issues Forum

ASCE 7-05 Wind Loads Question

thread176-320288
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Decartes (Structural)
17 Apr 12 18:06
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 (Structural)
17 Apr 12 18:18
I would probably use a "sign post" analysis - just assume that the gable is a big sign??
Decartes (Structural)
17 Apr 12 18:37
@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 (Structural)
17 Apr 12 23:59
I think the shape of the roof is more important than the number of columns.   
RobertHale (Structural)
18 Apr 12 8:04
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 (Structural)
18 Apr 12 22:06
@ 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.
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