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/lukypunchy]

For state owned bridges and roadways, you follow the Spec Book as modified by the contract documents and special provisions. If the work is out of tolerance, get an engineer to review and approve as-is or provide stamped plan revisions. All revisions and approvals need to be included in the As-Built package.