Product volume and tonnage is calculated based on silo size and item density.
This all starts with the height measurements given in silo measurements:
From the above picture we can look further into Silo 1 by navigating to silo configuration:
This is done by clicking on the webadmin menu item
This opens the following links available on the ~/MainPages/AdminHome.aspx
Here we click on the Silo Configuration link available in the low left of the page
This opens the page ~/DesignerPages/area_designer_datesStandard.aspx
If we choose Silo Dimensions, we see Silo1 is defined as a CementSilos Lookup type:
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Clicking on the Edit Volume Lookup Tables allows you to see the silo configuration:
To see how these values change click here: Silo Tonnage Calculations for Lookup Tables