I have stayed in the same hotel in Addison TX a couple of times recently for work trips.  The view from my window has been of a building site that has been progressively developing on each visit.  On one morning, I was just getting ready to check out when I could see the crew getting ready to lift a concrete panel into place.  The crane they were using was a substantial beast.  The crew were scattering to different locations to carry out their roles and then they started lifting the panel.  They had several lift lines which could be controlled individually to allow the, to rotate the panel as required.  Sadly I had to go before they finished.  I should be back before too long, though, so I shall see how progress is going.