The minimum point on a mass diagram is the location where which transition occurs?

The minimum point on a mass diagram is the location where which transition occurs?

• A. The zero balance line
• B. The cut transitions into fill
• C. The fill transitions into cut
• D. The minimum point occurs when fill transitions into cut

Answer: (D)

Mass diagrams show cumulative earthwork along the alignment, with positive values for cut and negative values for fill. The minimum point is the lowest value of this cumulative sum, which occurs at the boundary where the work switches from filling to cutting. Before that point you’re mainly filling (cumulative total goes more negative); once you reach the first cut, material is removed and the cumulative total begins to rise, reaching its lowest value right at that fill-to-cut transition. The zero balance line is a separate concept where the cumulative amount is zero, not the location of the minimum.

Mass diagrams show cumulative earthwork along the alignment, with positive values for cut and negative values for fill. The minimum point is the lowest value of this cumulative sum, which occurs at the boundary where the work switches from filling to cutting. Before that point you’re mainly filling (cumulative total goes more negative); once you reach the first cut, material is removed and the cumulative total begins to rise, reaching its lowest value right at that fill-to-cut transition. The zero balance line is a separate concept where the cumulative amount is zero, not the location of the minimum.