What does the top edge of a batter board represent?

The top edge of a batter board is significant in determining the height of the foundation wall. Batter boards are temporary structures set up to help with the layout of a construction project. They are typically placed outside the foundation's perimeter and serve as a reference point for transferring measurements and maintaining proper alignment during the excavation and foundation construction process.

By referencing the top edge of the batter board, builders can easily establish the required elevation or height of the foundation wall. This height determination is crucial for ensuring that the foundation is built to the correct specifications, particularly in relation to the finished floor level of the building. Properly setting the height of the foundation wall also aids in waterproofing and drainage strategies, ensuring the integrity of the structure over time.

The other choices relate to different aspects of foundation depth and dimensions, which do not pertain to the primary role of the batter board in indicating the wall height. Thus, the key function of the batter board is to provide a consistent reference for the construction team as they build the foundation.