UPLIFT ON METAL ROOF DECK
UPLIFT ON METAL ROOF DECK
(OP)
I am looking into the uplift capacity for a 3'' 20 gauge metal roof deck with supports at 14'-0'' OC. In zone 3 of my components and cladding wind load with and effective area of 50 SF (I am considering a 3' wide sheet 14' long) I am getting an uplift of 92 PSF. If I put that into a an ASD load combo of 0.6D + 0.6W net uplift is about 54 PSF.
Am I considering this correctly? Are a majority of the load table out there for metal deck allowable to downward & uplift load?
If I am considering this correct, I am thinking about cutting down the spacing in the corner beams to 9'-3'' since the decking does not have the allowable capacity for 54 psf at 14' spacing.
Am I considering this correctly? Are a majority of the load table out there for metal deck allowable to downward & uplift load?
If I am considering this correct, I am thinking about cutting down the spacing in the corner beams to 9'-3'' since the decking does not have the allowable capacity for 54 psf at 14' spacing.






RE: UPLIFT ON METAL ROOF DECK
RE: UPLIFT ON METAL ROOF DECK
In the Vulcraft catalog, this is noted by Sp (positive section modulus) and Sn (negative section modulus). If you install the deck as it is shown in the catalog and have a downward load, use Sp. If you install the deck as it is shown in the catalog and have an uplift load, use Sn. If you install the deck upside down from the way it is shown, then use the opposite values.
RE: UPLIFT ON METAL ROOF DECK
RE: UPLIFT ON METAL ROOF DECK
RE: UPLIFT ON METAL ROOF DECK
RE: UPLIFT ON METAL ROOF DECK
RE: UPLIFT ON METAL ROOF DECK
RE: UPLIFT ON METAL ROOF DECK
He is sending me a document to show the procedure of how the connections are checked for high uplift. I will share once I receive this document.
I was not familiar with the Profis diaphragm software. I will download and give it a shot.
Thanks!