This subassembly inserts a daylight solution that will use a typical slope as long as the daylight is within the ROW limits.
If the typical slope does not fall within the ROW (right-of-way), then a steeper slope is used. If the steeper slope still does not fall within the ROW, the user has options for controlling the behavior.
Attachment
The attachment point is at the inside edge of the first link. This subassembly typically attaches to the edge of the shoulder.
Input Parameters
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.
| Parameter | Description | Type | Default |
|---|---|---|---|
| ROW Offset from Baseline | +/- offset of the right-of-way limit from the baseline | Numeric |
3.0 m 10.0 ft |
| Typical Fill Slope | Fill Slope to be used normally | Numeric, positive | 4 (:1) |
| Maximum Fill Slope | Fill Slope to be used if the daylight is beyond the right-of-way | Numeric, positive | 2 (:1) |
| Typical Cut Slope | Cut Slope to be used normally | Numeric, positive | 4 (:1) |
| Maximum Cut Slope | Cut Slope to be used if the daylight is beyond the right-of-way | Numeric, positive | 2 (:1) |
| Hold Slope | Specifies what to do if the slope extends beyond the ROW offset. Choices are a list as follows: Hold Maximum Slope, Override Maximum Slope. | List | Hold Maximum Slope |
| Rounding Option | Specifies to round off the daylight link at the catch point. | List of options: None, Circular, Parabolic | None |
| Rounding By | Specifies the parameter that is used for rounding | List of options: Length, Radius | Length |
| Rounding Parameter | Specifies value for length of radius | Numeric, positive | 0.5 m |
| Rounding Tessellation | Specifies number of intermittent points on rounding links (Max 10 links) | Numeric, positive integer | 6 |
| Place Lined Material | Specifies to place optional material lining along daylight links. You can choose All Links or None. | String | None |
| Slope Limit 1 | Specifies the slope limit until which the associated material lining is placed | Slope | 1 : 1 |
| Material 1 Thickness | Specifies the thickness of the lined material. This thickness is measured perpendicular to the link. | Numeric, positive | 12 inches |
| Material 1 Name | Specifies the name of the material applied for lining along grading links | String | Rip Rap |
| Slope Limit 2 | Specifies the slope limit until which the associated material lining is placed | Slope | 2 : 1 |
| Material 2 Thickness | Specifies the thickness of the lined material. This thickness is measured perpendicular to the link. | Numeric, positive | 6 inches |
| Material 2 Name | Specifies the name of the material applied for lining along grading links | String | Rip Rap |
| Slope Limit 3 | Specifies the slope limit until which the associated material lining is placed | Slope | 4 : 1 |
| Material 3 Thickness | Specifies the thickness of the lined material. This thickness is measured perpendicular to the link. | Numeric, positive | 4 inches |
| Material 3 Name | Specifies the name of the material applied for lining along grading links | String | Seeded Grass |
Target Parameters
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 To Specify Corridor Targets.
| Parameter | Type | Status |
|---|---|---|
| ROW Offset | May be used to override the fixed ROW Offset and tie the ROW offset to an offset alignment. The following object types can be used as targets for specifying this: alignments, polylines, feature lines, or survey figures. | Optional |
| Daylight Surface | Name of the daylighting surface. The following object types can be used as targets for specifying this surface: surfaces. | Required |
Output Parameters
| Parameter | Description | Type | Default |
|---|---|---|---|
| Daylight Offset | Offset of the daylight point | Numeric | Daylight Offset |
| Daylight Elevation | Elevation of the daylight point | Numeric | Daylight Elevation |
Behavior
This subassembly is inserted left of the attachment point if a negative value has been specified for ROW offset, or if a ROW Offset Alignment has been specified that is on the left side of the controlling baseline. A positive value for the ROW Offset parameter results in the daylight being inserted on the right side. A negative value inserts it to the left.
There are 3 logical cases for this subassembly, as shown in the following illustrations.
Case 1 is shown in the following illustration.
The typical daylight slope allows the catch point to fall within the offset limit specified either by numeric value, or by the alignment location.
Case 2 is shown in the following illustration.
The typical daylight slope forces the catch point to fall outside the offset limit specified either by numeric value or by the alignment location. If the Hold Slope input parameter is set to Hold Maximum Slope, the slope is increased up to the maximum value. At this point the maximum slope is held and the catch point will be beyond the ROW Limit.
Case 3 is shown in the following illustration.
The typical daylight slope forces the catch point to fall outside the offset limit specified either by numeric value or the alignment location. If the Hold Slope input parameter is set to Override Maximum slope, the slope restrictions are ignored, and the catch point is placed at the ROW offset location.
As with all daylight subassemblies, rounding and lined material controls are available with this subassembly.
In Civil 3D 2010 and previous versions, the Material Thickness parameter was measured vertically. In Civil 3D 2011 and later, this parameter is measured perpendicular to the link. Therefore, if you open a drawing containing these subassemblies that was created in Civil 3D 2010 or prior in Civil 3D 2011 or later, and then rebuild the corridor(s), this parameter will be changed to reflect the new behavior. Any volume reports that use this subassembly will be updated to reflect the new behavior.
Layout Mode Operation
In layout mode, this subassembly will display all links and use the typical slope value specified in the input parameters.
Point, Link, and Shape Codes
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.
| Point, Link, or Shape | Codes | Description |
|---|---|---|
| P1 | Hinge, Hinge_Cut or Hinge_Fill | Hinge point. Hinge_Cut is used if the daylight link has an upward slope; Hinge_Fill is used if the daylight link has a downward slope. |
| P2 | Daylight, Daylight_Cut or Daylight_Fill | Daylight point |
| L1 | Top, Datum, Daylight, Daylight_Cut, Slope_Link | Daylight link for cut section |
| L1 | Top, Datum, Daylight, Daylight_Fill, Slope_Link | Daylight Link for fill section |
Coding Diagram
