Safety factor wooden roof uplift.
Safety factor wooden roof uplift.
(OP)
Hey Guys!
I am reviewing a wooden structure, offered by a third party for my project. As wind on slopped roofs produces pressure(windward) and uplift(leeward), I found that the wind uplift is comparable to the self weight of the elements (uplift/self weight=96% approx), so I am worried about the roof stability and I don´t wanna give a wrong feedback, because of my ignorance.
So my question is: Is it OK? If not, what should be the safety factor between the self weight and the uplift effect, and which normative could be referred.
All opinions are welcome.
I am reviewing a wooden structure, offered by a third party for my project. As wind on slopped roofs produces pressure(windward) and uplift(leeward), I found that the wind uplift is comparable to the self weight of the elements (uplift/self weight=96% approx), so I am worried about the roof stability and I don´t wanna give a wrong feedback, because of my ignorance.
So my question is: Is it OK? If not, what should be the safety factor between the self weight and the uplift effect, and which normative could be referred.
All opinions are welcome.
MSc. Eng. Serguei Joa
Structural Engineer
Bouygues Batiment International, Cuba.






RE: Safety factor wooden roof uplift.
I'm not sure where you are working, but many modern codes utilize ultimate limit states design. If you're using ULS and your uplift is 96% of uplift resistance, you're good to go.
RE: Safety factor wooden roof uplift.
RE: Safety factor wooden roof uplift.
Juston Fluckey, SE, PE, AWS CWI
Engineering Consultant
RE: Safety factor wooden roof uplift.
Finally I figured out that in that extreme case, when the wind uplift is equal to the selfweight the fastener connection has to be considered working in tension regime.
best regards,
MSc. Eng. Serguei Joa
Structural Engineer
Bouygues Batiment International, Cuba.