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MEASURED QUANTITY SENSITIVITY

Trapezoidal trench volume — bottom width scenarios.

How does changing bottom width affect trapezoidal trench volume when the other inputs stay fixed?

What this decision changes

This measured quantity or supplied dimension enters the method on its stated unit basis. Other inputs stay fixed so its effect can be separated from net deductions, stock constraints or purchase rounding. Method basis: Calculates measured geometry only. It does not choose side slopes, shoring, depth or excavation safety measures.

The focus is bottom width. All other shared inputs remain fixed for each evaluated range.

V = (top + bottom) × depth × length / 2Trapezoidal Trench Volume Calculator

Evaluate your supplied alternatives

Start with your measured plan and selected product data. The initial values and range are illustrative. Each scenario changes only bottom width; the other entered values stay fixed.

Measured plan and product inputs
Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Supplied comparison range for bottom width

Nine evenly spaced values are evaluated. Whole counts are rounded to distinct integer scenarios. Values between the listed samples are not calculated.

9 evaluated scenarios

Baseline: Trench volume — 15 m³. Rejected combinations remain visible below.

Trench volume across evaluated scenarios130.613.6250.72514.250.8514.8750.97515.51.116.1251.22516.751.3517.3751.475181.6
Each bar is one actual calculated trench volume. Horizontal values: bottom width in m.
Bottom widthTrench volumeChange from baselineUse this scenario
0.6 m13 m³-2 m³Open in calculator
Exact quantity breakdown
Cross-section area
1.3 m²

0.725 m13.625 m³-1.375 m³Open in calculator
Exact quantity breakdown
Cross-section area
1.3625 m²

0.85 m14.25 m³-0.75 m³Open in calculator
Exact quantity breakdown
Cross-section area
1.425 m²

0.975 m14.875 m³-0.125 m³Open in calculator
Exact quantity breakdown
Cross-section area
1.4875 m²

1.1 m15.5 m³0.5 m³Open in calculator
Exact quantity breakdown
Cross-section area
1.55 m²

1.225 m16.125 m³1.125 m³Open in calculator
Exact quantity breakdown
Cross-section area
1.6125 m²

1.35 m16.75 m³1.75 m³Open in calculator
Exact quantity breakdown
Cross-section area
1.675 m²

1.475 m17.375 m³2.375 m³Open in calculator
Exact quantity breakdown
Cross-section area
1.7375 m²

1.6 m18 m³3 m³Open in calculator
Exact quantity breakdown
Cross-section area
1.8 m²

Read the evaluated results

Read calculated demand, whole purchases and exact detail lines separately. This specific input may change quantity continuously, cross a purchase step or make the stated geometry or stock fit invalid.

  1. Replace every illustrative baseline measurement and selected product value with the inputs for your actual task.
  2. Enter a comparison range on the focused input's stated unit and quantity basis.
  3. Review rejected combinations and use the exact detail lines to distinguish measured demand from whole purchases.
  4. Open an evaluated scenario in the full calculator to save its original inputs and quantity breakdown to a browser material project.

Keep the comparison within scope

Compare measurements or already specified alternatives. Quantity sensitivity does not establish material suitability or construction requirements.

Dimensions, layouts, rates and material properties are supplied by the user.

Does not select construction specifications or certify safety.

Only the listed samples are evaluated. Intermediate values, alternate constraints and global cutting optimality are not inferred from the graph.

Continue with this quantity method

Trapezoidal Trench Volume Calculator

Other independent input decisions

Prepare the actual material data

Read the measurement and purchase guides

Quantity method and illustrative scenarios checked 6 October 2026. Methods and scope.