My thoughts are the one crane that you see on the west side and the other crane same location on east side. When they pick the truss system up they could both swing directly east til the west end of the truss clears the west crane. From there the west crane will swing counterclockwise to the north so the truss system is running nw to sw. The truss will then be lifted to the nw til it clears the east crane so it can turn clockwise to the north and it would have cleared both cranes to be set...see if I can draw something up...does that make sense?
That's how I'd do it.
It's kind of like parallel parking a car but instead of straightening up to get in between the cars you continue at an angle until you are on the complete other side of the cars and then straighten up. It's not an easy pick to make. Your operators and your flagger have got to be good.