What is meant by "Openings and Overlap Sum" in measurements?

The term "Openings and Overlap Sum" refers to the cumulative measurement that incorporates both openings in a structure, such as doors and windows, and the overlaps that may occur within those measurements. This concept is crucial when assessing the total area affected by these features since openings reduce the gross area, while overlaps might necessitate additional considerations in spatial calculations and volume assessments.

When calculating the openings and overlaps, it is essential to aggregate the dimensions of all relevant features to arrive at a comprehensive understanding of the structural layout. This aggregation is not limited to just counting the items, but also involves considering how these features impact the overall measurements of a space, thereby influencing various estimations related to construction, design, or restoration work. By summing total openings and overlaps, one ensures that all pertinent factors are accounted for in the measurement process, leading to more accurate and reliable data outcomes.