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[QUOTE="NJCuse97, post: 2595625, member: 5058"]
It will be a mostly downward force and if the roof sheds snow as it should, it will only need to support its own weight. The top of the steel structure ([USER=6422]RandomGuy[/USER] is right, this isn’t an architectural rendering) will be a compression ring the will take most of the roof’s downward force. The rest of the ring thickness will help disperse that load evenly. The key is to minimize the lateral forces pushing out. The ring will be wrapped or infilled with an architectural treatment that will need to let wind through so it doesn’t pick up a lateral wind load (the louvers RandomGuy mentions). The point of the ring structurally is almost exactly the same as the masts that are part of BC Place, the Millennium Dome, Denver International Airport, or the Olympic Stadium in Munich. A firm I worked at right out of school did one of the first fabric structures in the US for the NJ pavilion at the ‘64 World’s Fair in Flushing Meadows (long before my time there) and a later firm I worked for was part of the BC Place team. What’s funny to me is there was a lot of joking about the Duomo in Florence, and there are some very real structural similarities. 
[URL="https://goo.gl/images/3moNcY"]Google Image Result for https://data.epo.org/publication-server/image?imageName=imgaf001&docId=14420054[/URL]
[URL="https://goo.gl/images/SwoAo7"]Google Image Result for http://www.civilengineeringx.com/building/structural/FIGURE-8.32-Cable-roofs.-a-Cable-stayed-cantilever-roof.jpg[/URL]
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