DSCN8844 Cryptic markings

Note the markings: Every piece of steel is planned, ordered, created, delivered, and assembled in a specific place...all kept straight with a set of markings. It's a logistic marvel that each piece is exactly where it's needed in a pile of pieces, attached to cables by workmen on the ground, lifted to the workmen ready to grab and install it exactly where it's designed to be.

Done