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Message: [QUOTE="sutomcat, post: 3457431, member: 27"] Morning update: The 4 cranes outside the stadium are all working concurrently on the four sides of the building, to get the hard shell frame completed. Each is working counter clockwise and their job will be complete when they reach the triangle the crane adjacent to them started. Each crane is responsible for installing the framing for 9 columns. Right now, they all look to be keeping path with each other. They are each close to finishing the framing for their 4th column, which gets them to around 44% done. It looks to me as though the framing for each column is independent from the surrounding columns. If you look closely, there is a small gap between each section. You can see workers hop over it as they walk down the big beams directly. They look very comfortable doing this, which I find amazing. I assume this independent suspension allows the components of the roof to shrink and expand. I did a screen capture of the Lawrinson view this morning and penciled in where the hard shell sections will end on the northwest and southwest sections, so you can get a better idea of how big the PTFE section of the roof will be. [ATTACH type="full" alt="072820b.jpg"]184913[/ATTACH] Speaking of the PTFE section, the cranes inside the dome have been busy adding arcs to it. You can only see one closely from the Lawrinson view but I have also include a screen capture from the Link camera, blown up, that shows several more that have been added. I am not 100% sure how many arcs are going to be installed. There are 64 squares defined in the cable net for the PTFE section. From the Geiger drawing, it looks like not every square will get an arc, but most will. I am guessing somewhere in the 56 range. So they are much further along installing steel for the hard shell than the PTFE section. I count 5 in place now but I bet there are a few more than that. [ATTACH type="full" alt="072820a.jpg"]184912[/ATTACH] [/QUOTE]

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