This subassembly is used to replace an existing curb and gutter, with the sod strip tying to the existing inside edge of sidewalk. The vertical placement of the curb and gutter is controlled by a design profile of the back of curb.
To apply this subassembly, flange point information (alignment or offset value) is essential.
The attachment point is outside/highside point of the sod strip edge of the sidewalk. Though notionally this attachment point is to mark the highside of the sodstrip, actual location of sod strip high point could vary from this as the user attaches an appropriate marked point or alignment and profile. Therefore, this attachment point is more of layout time assistance rather than design point control.
Note: All dimensions are in meters or feet unless otherwise noted. All slopes are in run over rise form (for example, 4 : 1) unless indicated as a percent slope with a "%" sign.
This section lists the parameters in this subassembly that can be mapped to one or more target objects, such as a surface, alignment, or profile object in a drawing. For more information, see in the AutoCAD Civil 3D User’s Guide Help.
If marked points are provided, target parameters are unnecessary and will be ignored even if set. If marked points are not set, and offsets or alignments are used to locate points, it is expected to set profiles through target parameters. If they are not, this subassembly takes its elevation from the surface that is set in the target parameters described above.
If Back of Curb profile is not assigned in corridor definition, then the subassembly aborts with an error message in event viewer.
|
Parameter |
Description |
Type |
Default |
|---|---|---|---|
|
Superelevation Axis of Rotation |
Indicates whether the subassembly supports the axis of rotation calculation. To view a description of the parameter, in the Properties window, hover the cursor over the parameter. For more information, see Profile Grade Line Adjustments During Superelevation. |
Static (Description) |
|
|
Sod Strip Slope |
Cross slope of designed sod strip | Numeric | |
|
Gutter Slope |
Gutter slope in the new curb and gutter subassembly |
Numeric, positive |
This subassembly is used to place a new curb and gutter parametrically, and can optionally tie (with a sod strip) into either the inside edge of the existing sidewalk, or to a new sidewalk created with another subasembly. The horizontal placement of the curb and gutter is determined from the previously know flange point location. Highside of the sod strip can be located either by a fixed offset or any other marked point, such as inside edge of sidewalk. Alternatively this point can come from the target parameter of an aligment and profile. Newly designed flange point, optionally marked so that it can be used as input later for replacement lane subassemblies.
Key steps in completing this conditional subassembly are as follows:
All other curb and gutter links are inserted based on the Input Parameter dimensions Dimension A - Dimension F. All dimensions must be positive, non-zero values. If a non-zero subbase depth is given, the subbase layer is inserted to the back of curb, and continues for the Subbase Extension width. The subbase layer closes to the bottom-back-of-curb as shown in the diagram.
In layout mode the subassembly is set based on the attachment point and the default flange point offset from baseline. Width of the sod strip is computed by subtracting the curb and gutter total width from "flange point to attachment point" distance. Use 2% slope to calculate the low side of sod strip (or back of curb point), from which the rest of curb and gutter is drawn using the input parameters given.
The following table lists the point, link, and shape codes for this subassembly that have codes assigned to them. Point, link, or shape codes for this subassembly that do not have codes assigned are not included in this table.
