ASCE 7-10 Fig 27.4-7 1

[MacGruber22]

What does "All Shapes" refer to in the Roof Angle column on the table?

My roof angle is less than 45 degrees degrees, but it doesn't make sense to me to only have positive wind pressures across all of the roof. Any idea how to interpret this table?

"It is imperative Cunth doesn't get his hands on those codes."

 

[JAE]

The whole figure 27.4-7 applies to three different types of shapes of roofs - as shown in the three images.
The figure also applies to only roofs with Θ <= 45 degrees.

The "All Shapes" and the Θ <= 45 is again included in the table itself to reinforce the limitations on the numbers and use of the table.
In my view, there probably should not have been a horizontal line below the "All Shapes".

So for any of the three roof shapes, you would have a Case A and a Case B wind arrangement that you would include in your design, either primarily upward (Case A) or downward (Case B).



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[MacGruber22]

6 months later!

Thanks for the comments, JAE.

"It is imperative Cunth doesn't get his hands on those codes."

 

[JAE]

Wow, MacGruber22...I didn't notice that - just clicked on the post and saw it wasn't answered yet.
Appreciate your patience!!!



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[MacGruber22]

No problem, though that structure fell down due to no one getting back to me.

"It is imperative Cunth doesn't get his hands on those codes."

 

[JAE]

Alright...next time I'll get to it much faster, perhaps in 2 months rather than 6!

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