There was a site-wide meeting of almost all the workers today. Gives you some idea of the number of workers currently on-site.

The below ground floors and first few floors take a long time to build since they are typically unique. The construction technique uses scaffolding with beams on the lowest levels. Next they will use fixed size platforms about the size of a sheet of plywood, with large jacks holding them up (similar to what you find in basements).

Once they hit about the fourth floor the configuration is likely the same until the top of the building. For those floors they often use trusses supporting a table since they are much less labor intensive. The interesting part is the removal. The floor is poured on top. A few weeks later they lower the jacks a bit on the trusses, then use the crane to tug the table partway out of the building. Then they reattach the crane straps, and tug out and up. The form is then placed several floors above. I'm guessing they will be closing Tyee to traffic on days when the forms are pulled.

The tables/trusses are being assembled in the yard, put on a truck for a short distance and then craned to the top of the building.

First picture shows the first table/truss in place on the left side. The second picture shows the mini-platform system with the floor form almost complete. The last picture shows the trusses being assembled in the yard.

Here are the tables being pulled out and placed on the next floor

It is starting to show a large presence on the lower side of the site.