DJ, thanks for your comment.

Not sure which version ASCE 7 you are looking at but I assume you are just talking about the Envelope Procedure which is Chapter 28 of ASCE 7-10? (equivalent of “Simplified Procedure” of ASCE 7-05).

Chapter 27 – Directional Procedure actually covers many roof types.

Chapter 29 covers signs, chimneys, lattice frameworks…etc.

For non-orthogonal wall layouts, you just have to do projected wind load and decide on which direction would give you the worst case scenario for the building.

I heard the “Wind Loads: Guide to the Wind Load Provisions of ASCE 7-10” from ASCE is pretty good but I haven’t personally reviewed it. You can check out its abstract here: http://ascelibrary.org/doi/book/10.1061/9780784412756

Hope that helps.

Real structures don’t typically follow the ASCE 7 standard while trying to estimate the wind loads. Very rarely I’ve seen a Gable Roof on a building, while most roofs are hips with more added features such as chimneys skylights or even dutch gable with mansards. That just to cover the residential buildings.

The MWFRS on ASCE 7 shows only a simple gable roof with wind
pressures applied perpendicular to all surfaces while wind direction is
ALWAYS transverse or longitudinal. How about wind direction on 45 or 30 degrees? How about an odd shaped building that have multiple walls joining at 45 degrees or just ROUND exterior walls? How about a roof hexagonal or octagonal cupola? How would you accurately apply the wind pressures on such structures?

And then there’s non-building structures with odd shapes and geometry (such as chimneys, tanks, billboards, awnings, canopies, poles, round /hex/octagonal shelters, cupolas, tents, lattice framing structures, roof top equipments) that don’t seem to follow any of the ASCE 7 diagrams. And wind direction is NOT ALWAYS perpendicular to all building surfaces.

My question is if there’s any resources available to give us a better understanding of how wind pressures would apply to any structure? And how to better and clear interpret ASCE 7?

Any suggestions on books or perhaps videos?

Thank you for your patience,