Trench Definition Dialog

At the top of the dialog is the inverse elevation for the first point of the trench. If the inverse elevation of the point is unknown, check the Calculate Inverse Elevation box. The inverse elevation will be calculated by the program. Note - at least two inverse elevations must be defined.

• Below, to the right, are the properties of the trench. At the top are the style properties, Name, Line Color, Line Style and Line Width. Below that are the properties that define the define the size and shape trench.

These properties vary with the trench type.

Vee Bottom Drain

• Sloped Wall Rise
• Sloped Wall Run

Flat Bottom Drain

• Sloped Wall Rise
• Sloped Wall Run
• Trench Width - width of the bottom of the trench

Pipe/Conduit Trench

• Sloped Wall Rise
• Sloped Wall Run
• Trench Width* - width of the bottom of the trench
• Max. Vertical Wall - maximum height of vertical portion of trench wall
• Pipe Diameter* - diameter of pipe or conduit. This volume is subtracted from fill requirements.
• Bottom Bedding - depth of bedding below the pipe/conduit.
• Side Bedding* - width of bedding beside the pipe/conduit.
• Top Bedding - depth of bedding above the pipe/conduit.

* Trench Width, Pipe Diameter and Side Bedding are related. If Side Bedding is not 0, then Trench Width = (2 X Side Bedding) + Pipe Diameter. A change to one property will affect the others.