Use this tab to view or change the AutoCAD Civil 3D part types that will be matched up to Storm Sewers part types when importing pipe network data from a Storm Sewers Extension .stm file into AutoCAD Civil 3D.
The list of available Storm Sewers part types is displayed in the first column. In the second column, click in a cell, and then click 
to display the AutoCAD Civil 3D Part Catalog dialog box. Select a part type and click OK.
- Importing Circular Structures
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This section lets you specify the AutoCAD Civil 3D part types that will be used when importing circular structures from a Storm Sewers Extension .stm file.
- Importing Rectangle Structures
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This section lets you specify the AutoCAD Civil 3D part types that will be used when importing rectangular structures from a Storm Sewers Extension .stm file.
- Miscellaneous Part Types
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This section displays the AutoCAD Civil 3D part types that will be used for importing Storm Sewer parts that do not have a part type specified. Storm Sewers parts that do not have a part type specified are by default matched up to null structures when imported into AutoCAD Civil 3D.
- Importing Pipes
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This section lets you specify the AutoCAD Civil 3D part types that will be used when importing pipes from a Storm Sewers Extension .stm file.