Exercise 1 — Trench Calculator

In this exercise, you will practice using the Trench Calculator to take-off piping and bedding materials. Complete the following steps:

  1. In the Training Job, create a new cost item called Underground Pipe.

  2. Give the cost item a quantity and unit of measure of 1640 Linear Feet.

  3. Open the new cost item and open the Trench Calculator.

  4. On the Trench tab, enter the variables for the trench:

    Trench length

    1000 feet

    Trench width (at bottom)

    4 feet

    Trench depth

    10 feet

    Hinge elevation

    5 feet

    Backslope

    45 degrees

    Material swell/shrinkage factor

    0.10 (decimal)
    • Do NOT check the box to bring in volume shrinkage.

  5. Select the MPR36 material resource from the drop-down Results list.

  6. On the Beddings tab, enter bedding variables.

    Bedding lift 1

    Elevation (from trench floor)

    6 inches

    Additional material needed to compensate for compaction

    5.00%

    Conversions factor (Ton per CY)

    1.3

    Bedding material resource (Tons)

    MASAND

    Bedding lift 2

    Elevation (from trench floor)

    38 inches

    Additional material needed to compensate for compaction

    5.00%

    Conversions factor (Ton per CY)

    1.1

    Bedding material resource (Tons)

    MAFA

    Bedding lift 3

    Elevation (from trench floor)

    76 inches

    Additional material needed to compensate for compaction

    5.00%

    Conversions factor (Ton per CY)

    1.1

    Bedding material resource (Tons)

    MACA1-1/2

  7. Select OK and confirm that the pipe material and bedding materials populated the cost item.

You should end up with the following results

Congratulations, you have completed this exercise!