Net uplift on metal deck on bar joists
Net uplift on metal deck on bar joists
(OP)
What are the major effects of net uplift on a roof deck? I know that I have to show the net uplift on the documents for the joist mnfr to design for, which will end up in extra bridging lines. But what other major issues should I be concerned about? I believe that the 22 ga metal deck connection to jsts should be OK.
The roof slope angle is less then 3 degrees, there is no ballast.
The roof slope angle is less then 3 degrees, there is no ballast.






RE: Net uplift on metal deck on bar joists
There is also shear/uplift interaction on the metal deck and sidelap fasteners.
RE: Net uplift on metal deck on bar joists
We usually just specify the uplift on the design drawings and let the mfr figure what needs to be done to the joists. Like you said, they will add the extra bridging to the system as needed. I will say though, that I have never designed a roof over 120mph so I don't really know if there are any other problems at higher wind speeds.
RE: Net uplift on metal deck on bar joists
SteelPE, I am in 90 mph zone (IL).
Thanks for the input.
RE: Net uplift on metal deck on bar joists
I always have a tendency of making things way more complicated than they need to be.
RE: Net uplift on metal deck on bar joists