What is the term for the average finished ground level adjoining a building at exterior walls?

The term for the average finished ground level adjoining a building at exterior walls is "Grade Plane." This is an important concept in construction and building design, as it is used to determine various aspects of a structure's foundation and its relationship to the surrounding terrain.

Grade Plane refers to the hypothetical plane that represents the average elevation of the ground at the perimeter of the building. This level is critical for several reasons, including ensuring proper drainage away from the building and providing a basis for calculating the height of the structure. By using the Grade Plane, builders and architects can assess how the height of the building complies with zoning regulations and helps prevent issues such as water accumulation around the foundation.

Understanding and correctly identifying the Grade Plane is crucial in plumbing and construction, as it influences decisions regarding the installation of drainage systems, water lines, and the overall design of ground-level treatments around the building.