On the HSR, which is between St. Petersburg and Moscow, the first bridge girder was recently installed. The scale is, of course, very large. 700 tons, 32 meters long. Now all that's left is to repeat this about 4,000 times.
What is interesting is that these beams are manufactured in training grounds along the future track, and not within the same factory. But in general, the scale of construction there is such that only about a million piles will be required, for which 14 factories are building at once. And two more factories for rail panels and so on.