Construction Centres are Taldar structures.
Relatively small structures, these factories are the most poorly designed of all structures. Many elieve this is because they are rendered obsolete by Vyronicia Drone.
They are now obsolete. The Construction Centers were once used for producing robots, and many other things which are now produced by Drones. However, they are still used for overseeing construction.
The structure is made purely of Gyronidium. The buildings were powered by Chronoscopic (which is wired to through the underground). They were linked to by trains, which presmably transported Gyronidium from Chronoscopic Reactors.
They can occaisionally be found in some areas on Vyronia and some old Taldar colonies, but the geogrpahy behind them is unknown.
In fact, the Taldar never used these structures or anything like them. They can construct things themselves; being 5D beings, they can manipulate space to put something together, and it isn't difficult.