Shed roof uplift and ground anchoring concern
Hi. I am in Zone 4a near Nashville
I am concerned about winds turning my shed roof into an airplane wing. What would be the advice on keeping the roof on and posts in ground?
18x56ft shed roof, no walls (except high side – barn)
12-16ft off ground
Only 3 6×6 posts 28ft O.C.
Enclosed Gable Pole Barn:
18×56 ft shed roof
3ea 6×6 posts supporting the 56′ of roof at 28ft O.C. spacing of the posts.
Girders – bar joist girders
2×10 rafters 24″O.C.
metal roof. No sides.
The high (barn) side of the shed roof will be about 16ft high and the low (eve) side of the shed roof will be about 12or 13ft high.
Occasional high wind gusts.
Shed roof faces south and prevailing winds come from south/southwest.
Note: I need the spacing so I have plenty of room for logs, sawmill, lumber; so, more posts are not an option I am considering.
Am I wrong to be concerned?
Thank you for your advice.
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