Use this tab to view or change properties associated with this structure.
This tab displays the properties associated with this structure, along with their current values. Structure properties define a variety of characteristics of the structure object, including its basic size and shape and elevation adjustment behavior.
Some properties are specific to a certain type of structure. For example, only junction structures use rim and sump behavior properties. Only inlet-outlet structures use properties that define headwalls such as Headwall Base Width.
Some properties are read-only and others are editable. To change an editable property, double-click on the Value field and enter a new value, or select one from the list. For more information, see Part Properties
These properties specify general characteristics of the structure, such as the structure elevation at its insertion point, and the surface and alignment referenced.
These properties specify characteristics such as the structure’s rotation angle, offset, station data, and the number of pipes that are currently connected to the structure.
These properties are associated with junction structures only. They specify the structure’s rim elevation and adjustment behavior.
- Insertion Rim Elevation
- Automatic Surface Adjustment
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Specifies whether or not to automatically adjust the rim elevation to the referenced surface, including the Surface Adjustment Value. When this property is set to True, grip editing the structure modifies the surface adjustment factor. When this property is set to False, grip editing the structure modifies the rim elevation.
- Surface Adjustment Value
These properties are associated with junction structures only. They specify the structure’s behavior, elevation, and the depth of the structure’s sump.
These properties specify a variety of part characteristics, such as part type, part subtype, and the part size name as defined in the part catalog. Some of these properties define the part’s basic shape and behavior, and therefore are read-only.
- Part Type
- Part Subtype
- Part Description
- Part Size Name
- Structure Shape
- Vertical Pipe Clearance
- Rim To Sump Height
- Headwall Base Width
- Headwall Base Thickness
- Wall Thickness
- Floor Thickness
- Material
- Frame
- Grate
- Cover
- Frame Height
- Frame Diameter
- Frame Length
- Frame Width
- Barrel Height
- Barrel Pipe Clearance
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This property lets you determine how close to the structure’s rim you can position a pipe. It is used for two-tiered junction structures only and specifies the clearance required above the top of the barrel section of the structure. It is similar to Vertical Pipe Clearance, but only describes the transition zone between the access cylinder and the larger barrel cylinder of a two-tiered structure.
- Cone Height
- Slab Thickness
- Inner Structure Diameter
- Structure Height
- Structure Diameter
- Structure Width
- Structure Length
These properties specify the hydraulic grade line, the energy grade line, and the junction loss values for pipe networks that contain this data.
Hydraulic grade lines and energy grade lines, when present, are displayed as a straight line through structures, connected between the HGL Up or EGL Up property from one pipe to the HGL Down or EGL Down property of the next pipe. For more information, see Adding Hydraulic Property Data to AutoCAD Civil 3D Pipe Networks.
- Hydraulic Grade Line
- Energy Grade Line
- Known Capacity
- Bypass Target
- Inlet Location
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Specifies the inlet type. This property supports a process for translating AutoCAD Civil 3D part data and converting it Storm and Sanitary Analysis elements. When exporting to Storm and Sanitary Analysis, Inlet Sag (a True/False value) will be set in the STM file according to the AutoCAD Civil 3D Structure's Inlet Location value. Upon import into Storm and Sanitary Analysis, the Inlet Sag value from the STM file is used to select the appropriate Storm and Sanitary Analysis part for each part in the STM file.
- On Grade: Use for storm drain inlets which are located on slopes. An on‐grade storm drain inlet is able to capture some, but not always all stormwater runoff. It captures all stormwater runoff at smaller flowrates, but as flowrates increase a point is reached where some stormwater bypasses the inlet, perhaps continuing to another storm drain inlet further downstream with additional flows joining it along the way.
- On Sag: Use for storm drain inlets which are located at low points (or depressions).
- None: Use for structures which are not inlets.