2.0

Chapter 6 Working with Pipes
694
Conceptual Pipe Runs in Profile (continued)
Column Headings Description
Pipe Size This column contains the pipe size. You can enter any pipe size in this column; however,
only pipe sizes that are defined in the Pipe Slope Control Table can be automatically
sized based on flow. If the pipe diameter is too small for the design flow, the Pipes Run
Editor automatically selects the next available size that meets the design flow
requirements.
Pipe Slope This column contains the pipe slope value, entered as ft/ft or m/m. For example, enter
the value,
0.02
, for a pipe slope of 2 %. When you change the pipe slope value, the
Pipes Run Editor automatically recalculates the value for the finish invert elevation for the
pipe segment, as well as all of the downstream invert elevations.
Rim Elev. This column contains the rim elevation of the node. Once you define the run, modifying
the nodes rim elevation does not affect the inverts in or out.
Rough Coeff This column contains the roughness coefficient value for the pipe segment for use in
flow calculations, which you can edit. The roughness coefficient used depends on which
formula and method you use for pipe flow calculations: Manning, Darcy-Weisbach, or
Hazen-Williams. You can either enter a roughness coefficient value, or place your cursor
in the Rough Coeff column and click Edit to open the appropriate Coefficient Table
dialog box.
Start Inv. This column contains the starting invert elevation value for the pipe segment. This value
is also the invert out elevation of the current node. You enter only the first starting invert
elevation value; each subsequent starting invert through the pipe run is calculated by
subtracting the structure drop from the finish invert of the previous pipe, which is the
invert in elevation of the current node.
Station This column contains the station value of the nodes location point, relative to the
current alignment. If there is no currently referenced alignment, this column is left blank.
Str-Str 3DLength This column contains the structure-to-structure 3D length value of the pipe segment.
Struct Dim. This column contains the structure diameter value of the node, which is taken from the
Structure Library Editor dialog box. You cannot edit the structure diameter value.
Struct Type This column contains the nodes structure type. You can either enter the structure name,
or select a structure from the Structure Library Editor. Place your cursor in this column,
and then click Edit to open the Structure Library Editor dialog box.
Sump Drop This column contains the sump drop value, which represents the structures sump depth
below the nodes lowest invert elevation. The sump drop value is taken from the
Structure Library Editor dialog box and cannot be edited.
Sump Elev This column contains the nodes sump elevation value, which is based on the lowest
invert elevation and the sump drop. You cannot edit the sump elevation value.
Sump Fixed This column contains the sump elevations on/off value. By default, the Sump Fixed field
is ON, which means the sump elevation is fixed and is dictated by the node structures
depth. If the Sump Fixed field value is OFF, then the sump elevation is variable and will
not be reset by pipeworks.
Surface File This column contains the surface runoff file name. For information about the Runoff
option, refer to the section, Runoff, later in this command description.