Which came first.....

The crane or the crane yard? Ever since I've been heading up and down the M1 for work theres something that has always puzzled us engineers. Near Sheffield there is a crane storage yard. There are dozens of sections of crane in there and one massive crane to lift all the parts around. The question we always ask as we pass by is how did they build the massive crane when they only had a yard full of parts? It passes the time on the long drive north.