Project engineer for local transit authority here is Phila Pa. Rail power, signals and communications are my speciality.
We are currently replacing the elevated railroad structure thru west philly, trains are in service during the week, and we do all work on the weekends replacing 2 deck sections per weekend. Each deck section is 2 pieces, averaging 80 ft long, and weighing 160,000 to 180,000 lbs. We use two 600 ton capacity cranes to lift the deck sections, going rate for these cranes is around $1K an hour plus operators. Fitting tolerance for these deck sections is 1/4 inch!