Sewing up the roof.

 

The secret to a perfectly fitting garment, is in getting the pattern right. The same applies to the roof of a stadium.  Each piece of this roof was carefully cut to exact measurements, and "sewn" together.  They still need to cover the gaps, so there's no dripping on the spectators.

The catwalk which goes across the middle of the picture, hold the spotlights and sound system.  Now there's another job I'm pleased I don't have to do - man the spot lights :).