What does "plumbing in" mean in surveying terms?

In surveying, "plumbing in" refers specifically to the practice of ensuring that a structure is vertically aligned, particularly when setting up vertical elements such as walls, columns, or other structural components. This process is crucial in construction, as achieving a correct vertical alignment is fundamental to the integrity and aesthetics of the building. Techniques commonly used for plumbing in may involve the use of plumb bobs, laser levels, or optical levels to confirm that the elements are vertical according to design specifications.

While measuring the depth of a foundation, checking water levels in surveying instruments, or assessing underground drainage systems are important tasks within the field of surveying, they do not relate to the concept of "plumbing in." These other activities focus on different aspects of surveying and construction rather than the vertical alignment of structures, which is at the core of what plumbing in actually involves.