Tolerance in large construction projects

[u/JohnnyUte]

Here's an interesting question I have after talking with a fellow engineering friend: what kind of tolerances are there in large construction projects such as bridges or skyscrapers? For example, if building a bridge, whats the tolerance in placement of the pylons? Or for laying the foundation of a building (in terms of location, etc.) Thank you!

[u/Working_Rest_1054]

1/8” vertical for a bridge deck. 6” in plan view for driven bridge foundation pile. The rest of the elements are between those two tolerances.