What is the term used for the rod reading that occurs when the bottom of the rod is at the finish grade at the centerline?

The term "grade rod" refers to the rod reading taken when the bottom of the rod is positioned at the finish grade elevation at the centerline of a project. This measurement is crucial for surveyors as it helps establish the precise vertical position of site features concerning the planned design.

The grade rod is an essential tool used in leveling and grading work, allowing surveyors to determine cut and fill quantities on construction sites accurately. The readings taken on the grade rod at the finish grade provide a clear reference point for ensuring that the final elevations of pavements, buildings, and other structures are at the intended level.

The other terms mentioned do not accurately describe this specific reading. For instance, a "ground rod" might refer to various types of rods used for different surveying tasks but does not specify that it is used for finish grade readings. Similarly, "finish rod" and "centerline rod" are not widely recognized terminologies in surveying literature for this particular context, further emphasizing the correct applicability of the term "grade rod."