Two files are mandatory sources of data required for the part to function properly, and one is
an optional bitmap that provides the preview image you see in the catalog browser and parts-list
First, dig into the US Imperial Pipes folder as follows:
C:\Documents and Settings\All Users\Application Data\Autodesk\C3D2010\enu\Pipes
Catalog\US Imperial Pipes\Circular Pipes
This reveals the following files for the Imperial Circular Pipe:
partname.dwg: This part drawing file contains the geometry that makes up the part as well
as the definition of the parametric relationships.
partname.xml: This part XML file is created as soon as a new part file is started in Part
Builder. This file contains information on the parameter sizes, such as wall thickness,
width, and diameter.
partname.bmp: This part image file is used as a visual preview for that particular part in
the HTML catalog (as you saw in the previous section). This file is optional.
You’ll study some of these files in greater detail in the next section.
Mark on your checklist which parts you’d like to use from the standard catalog, and also note
the parts that you may have to customize using Part Builder.
Part Builder
Part Builder is an interface that allows you to build and modify pipe network parts. Part Builder
is accessed by selecting Create Design Partbuilder from the Home tab. At first, you may use
Part Builder to add a few missing pipes or structure sizes. As you become more familiar with the
environment, you may build your own custom parts from scratch.
This section is intended to be an introduction to Part Builder and a primer in some basic skills
required to navigate the interface. It isn’t intended to be a robust ‘‘how-to’’ for creating custom
parts. For more details on building custom parts, please see the Civil 3D Users Guide —whichyou
can access through the Civil 3D Help interface, as well as in .pdf format under Help Users
Guide (pdf). Civil 3D 2010 also includes three detailed tutorials for creating three types of custom
structures. The tutorials lead you through creating a Cylindrical Manhole structure, a Drop Inlet
Manhole structure, and a Vault structure. You can find these tutorials by going to Help Tutorials
and then navigating to AutoCAD Civil 3D Tutorials Part Builder Tutorials.
Back Up the Part Catalogs
Here’s a warning: before exploring Part Builder in any way, it’s critical that you make a backup copy
of the part catalogs. Doing s o will protect you from accidentally removing or corrupting default parts
as you’re learning and will provide a means of restoring the original catalog.
The catalog (as discussed in the previous section) can be found by default at
C:\Documents and Settings\All Users\Application Data\Autodesk\C3D2010\enu\Pipes
To make a backup, copy this entire directory and then save that copy to a safe location, such as
another folder on your hard drive or network, or to a CD.

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