Big Crane in Town

Intel is expanding: they are building a new fab (integrated circuit wafer fabrication facility) at Ronler Acres.

I don't understand exactly why they need so many cranes. Note that the second blue crane from the front, the one with the top of the boom towards the left side of the picture, is a super heavy duty model.

There is a vertical strap connecting the support boom to a
big counter balance weight made of concrete blocks.

I am thinking this big thing with all the diagonal bracing might be the frame for the roof, and when they get it assembled, they are going to hoist the whole thing up in the air. But it looks much too robust to be framing for a roof, so maybe there is something else going on.