Quantities

DRAINS calculates the volumes of excavation from the pipe lengths and invert levels, making the following assumptions:

1. The default trench width is as shown below, with 200 mm being added for each parallel pipe in addition to the first one.
   

These dimensions can be changed by specifying other widths in the Pipe data base.

1. The bedding depth is assumed to be 50 mm below the outside of the pipe wall.
   

Outputs of quantities from the Run menu and from a Pipe property sheet are shown below:

These include all pipes defined as 'new' in the Pipe property sheet, but exclude pipes defined as being 'existing'.

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