Consider an open structure (picnic shelter)
Should the roof be considered as an overhang for calculating the wind load pressure by the ASCE7-98 procedure?
Or, what is the true definition of an “overhang” in ASCE7-98?
We just faced that decision on a swimming pool bathhouse where a portion of the bathhouse had a large roof overhang - we opted to go with the overhang uplift pressure - We just felt that we could visualize a high wind sending the 15 feet of roof sky high.
For a completely open building - some kind of monoslope system would be appropriate - the primary failure is really a straight-upward suction.
Above is a snippet.