UrbMedian
Last updated: 2021-02-12
Description
The UrbMedian subassembly inserts links for a standard shape concrete curb and gutter with base course layers. Dimensions of the shape are controlled by curb and gutter types per WisDOT Standards. See WisDOT Standard Detail Drawings for further information on curb shape and dimensions.
Behavior
The location of the marked point is determined.The Marked Point specified must be found in the direction of the insertion side or the subassembly will not be inserted and an error will be logged in the event viewer.Links are extended inward between the attachment point and the marked point locations, with the curb and gutter links being inserted first.If the horizontal distance between the attachment point and the marked point is less than what is needed to construct the curbs, the subassembly will not be inserted and an error will be logged in the event viewer.
Curb shape and dimensions are derived from WisDOT standard detail drawings as shown in the WisDOT Facilities Development Manual.Curb selection from standard detail drawing is determined by inputs for Curb and Gutter Type, Size, and Curb Head Height.
Integral Curb designation will not affect subassembly construction of the curb, it is used for proper assignment to pay item in quantity takeoff.
If the Gutter Slope Method selected is Use Outside Lane SE (Left or Right-side) or Use Inside Lane SE (Left or Right-side), Dimension C, the depth from the flange point to the gutter flowline, is calculated based on a -6.25% slope in normal crown. The gutter slope only deviates from a slope of -6.25% when inserting the subassembly on a superelevated high side where the superelevation defined for the baseline alignment exceeds 2%. The methodology is further explained below.
- If Left Gutter Slope Method or Right Gutter Slope Method is set to Use Right-Side Outside Lane SE or Use Right-Side Inside Lane SE, the subassembly uses the baseline alignment's SE for the right-side to determine the gutter slope. The gutter slope for the side in question will be -6.25% unless the SE exceeds 2%. Where SE exceeds 2%, the gutter slope will equal the SE rate for the baseline alignment.
- If Left Gutter Slope Method or Right Gutter Slope Method is set to Use Left-Side Outside Lane SE or Use Left-Side Inside Lane SE, the subassembly uses the baseline alignment's SE for the left-side to determine the gutter slope. The gutter slope for the side in question will be -6.25% unless the SE exceeds 2%. Where SE exceeds 2%, the gutter slope will equal the SE rate for the baseline alignment.
- If Left Gutter Slope Method is set to Fixed Slope, the slope of the leftmost gutter will follow the value of the Left Gutter Slope parameter.
- If Right Gutter Slope Method is set to Fixed Slope, the slope of the rightmost gutter will follow the value of the Right Gutter Slope
-
If Left Gutter Slope Method or Right Gutter Slope Method is set to Fixed Slope, once an Assembly has been built, the user has the option to set a parameter reference in Assembly Properties and use the Pavement Slope of an adjacent lane to define the gutter slope on the side in question.
Various base course layer depths can be defined for both the left and right sides. The Left Depth to Subgrade and Right Depth to Subgrade defines the depth to the bottom of the lowest base course layer for each side separately. If the Left Base Depth entered is greater then the Left Subbase Depth entered, then Left Subbase Depth is equal to the Left Base Depth. If the Left Depth to Subgrade input is less then either the Left Base Depth or the Left Subbase Depth, then the Left Depth to Subgrade will be equal to the greater of the two values. The same is true on the right side
When Full Depth Subgrade Through Median is False, the subgrade surface is inserted to the back of curb, and continues for a distance defines by the Subgrade Width inputs for both left and right sides.From the subgrade shoulder point, a nearly vertical link (small constant width from the bottom to the top to allow it to be modeled in a surface - shown in red in the diagram below) is inserted up to the intersection with the Datum surface.All base course layer links extend to the intersection with this nearly vertical link, as shown in the diagram.
When Full Depth Subgrade Through Median is True, the base, subbase and subgrade surface is inserted to the back of curb, and continues for a distance define by the Subgrade Width inputs for both left and right sides.From the end point of each base/subbase course layer and subgrade surface, a straight link is inserted.
User has the option of setting Parameter References for Base and Subbase course depths, as well as the Depth to the Subgrade Surface using the depths of these same surfaces output from the adjacent lanes.
Subgrade slope is controlled by the Left Subgrade SE Method and Right Subgrade SE Method parameters. User also has the option of entering a fixed slope to be used, following the using the Right-Side Outside Lane SE defined for the baseline alignment, using the Right-Side Inside SE defined for the baseline alignment, using the Left-Side Outside Lane SE defined for the baseline alignment, or using the Left-Side Inside Lane SE defined for the baseline alignment. When Left Subgrade SE Method and/or Right Subgrade SE Method is set to Fixed Slope, this slope(s) can be controlled using a Parameter Reference that sets the slope equal to that of the subgrade surface of an adjacent lane. In all situations, the slopes of all base course surfaces will follow the slope of the subgrade surface on the respective side.
On each side, the subassembly builds the shape for a simple curb and gutter, starting at the flange point. The bottom of the curb link is parallel to the gutter.
From the back of curb on each side, top of median links are extended inward at slopes defined by parameters Median Slope Constraint, Median Slope From Left and Median Slope From Right. When the Median Slope Constraint parameter is set to Equal, slopes coming from the left and right side are computed to be equal and Median Slope From Left and Median Slope From Right parameters are ignored. The other two options available are to use the Median Slope From Left parameter to define the slope of the median link extending from the left, thereby constraining the slope of the median link extending from the right side, or to use the Median Slope From Right to define the slope of the median link extending from the right, thereby constraining the slope of the median link extending from the left side.
When the Median Slope Constraint is set to Use Median Slope From Left or Use Median Slope From Right, the median links between the back of the right and left side curb and gutter are defined using the Median Slope From Left or Median Slope From Right, respectively AND either a constraining offset location for the peak of the median or a constraining elevation for the peak of the median. The Constraining Feature cannot be No when the Median Slope Constraint is either Median Slope From Left or Median Slope From Right. When using the Equal SlopesMedian Constraint with no Constraining Feature, a link will be inserted from the back of the left side curb to the back of the right side curb in a straight line.
When a Pavement Depth is specified, these links are inserted parallel to top of the median links.When a Median Base Depth is specified, these links are also inserted parallel to the top of median links.
Attachment & layout mode operation
The attachment point is at the flange point of the gutter on either the right or left side of the median.
Input parameters
Info: All dimensions are in feet unless otherwise noted. Curb-and-gutter dimensions must be given in inches. All slopes are in run-over-rise form (for example 4:1) unless indicated as a percent slope with a "%" sign.
In layout mode the subassembly displays the curb-and-gutter components based on the Input parameters given.The subgrade and other base course layers are inserted at a slope of -2% for both left and right side.The median between the back of the left side and right side curb and gutter is drawn with a 4% slope from both sides.
| Parameter | Description | Type | Default |
|---|---|---|---|
| Side | Specifies which side to place the subassembly. This parameter only affects layout mode. In design mode, side is determined by attachment point and marked point. | Left/Right | Right |
| Marked Point Name | Name of a previously defined marked point. Marked point must be found in the direction of the insertion side. | String | RT |
| Curb and Gutter Type | Type of curb and gutter to construct, "sloped" suffix indicates sloped curb head when it is an option for that curb type. |
String, Combo List of options: A ; A-sloped ; D ; D-sloped ; G ; J ; K ; L ; R ; T |
A |
| Size (inches) | Curb and Gutter Size. Size is the horizontal distance from the back of curb to the flange of curb. |
Numeric, List of options: 18 ; 30 ; 36 |
30 |
| Curb Head Height (inches) | Vertical distance from the flowline to the top of the curb head. |
Numeric, List of options: 4 ; 6 |
6 |
| Integral Curb? (Y/N) | Assigns curb quantity to integral curb pay item when answered "Yes" . Integral curb is an option for Curb types D, J, and L only. |
String, Combo List of options: a) Yes; b) No |
No |
| Left Gutter Slope Method | Specifies method of gutter slope calculation for leftmost gutter. If using either Outside Lane SE or Inside Lane SE, slope in normal crown is equal to -6.25% and only changes when slope exceeds 2% on the high side. Remains -6.25% on low side. |
String, Combo List of options: a) Use Right-Side Outside Lane SE; b) Use Right-Side Inside Lane SE; c) Use Left-Side Outside Lane SE; d) Use Left-Side Inside Lane SE; e) Fixed slope; |
Use Right-Side Outside Lane SE |
| Left Gutter Slope | Specifies fixed gutter slope for the leftmost gutter. Depth from the flange point to the gutter flowline determined by this slope. | Slope | -6.25% |
| Left Base Depth | Distance to the bottom of the first base course layer on the left side. This measurement is taken from the top of the pavement. If there is no base course layer on the left, a zero depth should be used. | Numeric, positive | 0.0 |
| Left Subbase Depth | Distance to the bottom of the second base course layer on the left side. This measurement is taken from the top of the pavement. If there is no second base course layer on the left side, a zero depth should be used. | Numeric, positive | 0.0 |
| Left Depth to Subgrade | Depth to Subgrade Surface at the flange point on the left side. The depth specified here should be the depth to the bottom of the last base/subbase course layer. | Numeric, positive | 1.5 |
| Left Subgrade Width | Distance the base/subbase courses are extended beyond the back-of-curb on the left side. Use zero to terminate the base/subbase courses at the back-of-curb on the left side. If Full Depth Subgrade Through Median is True, this value is ignored. | Numeric, positive | 1.0 |
| Left Subgrade SE Method | Selects whether to use the superelevation definition for the baseline to define the slope of the subgrade surface or to set a fixed numeric % slope value. If Fixed Slope is specified, once an Assembly has been built, the user has the option to set a parameter reference in Assembly Properties and use the Subgrade Slope of an adjacent lane to define the subgrade slopes here. |
String, Combo List of Options: a) Fixed Slope; b) Use Right-Side Outside Lane SE; c) Use Right-Side Inside Lane SE; d) Use Left-Side Outside Lane SE; e) Use Left-Side Inside Lane SE; f) Use Right-Side Outside Lane SE multiplied by -1; g) Use Right-Side Inside Lane SE multiplied by -1 ; h) Use Left-Side Outside Lane SE multiplied by -1; i) Use Left-Side Inside Lane SE multiplied by -1 |
Use Right-Side Outside Lane SE |
| Left Fixed Subgrade Slope | Cross slope of the subgrade surface on Left side. This value is used if Fixed Slope is the Left Subgrade SE Method selected, or SE is not defined for the baseline alignment. | Slope | -2% |
| Right Gutter Slope Method | Specifies method of gutter slope calculation for rightmost gutter. If using either Outside Lane SE or Inside Lane SE, slope in normal crown is equal to -6.25% and only changes when slope exceeds 2% on the high side. Remains -6.25% on low side. |
String, Combo List of options: a) Use Right-Side Outside Lane SE; b) Use Right-Side Inside Lane SE; c) Use Left-Side Outside Lane SE; d) Use Left-Side Inside Lane SE; e) Fixed slope |
Use Left-Side Outside Lane SE |
| Right Gutter Slope | Specifies fixed gutter slope for the rightmost gutter. Depth from the flange point to the gutter flowline determined by this slope. | Slope | -6.25% |
| Right Base Depth | Distance to the bottom of the first base course layer on the right side. This measurement is taken from the top of the pavement. If there is no base course layer on the right, a zero depth should be used. | Numeric | 0.0 |
| Right Subbase Depth | Distance to the bottom of the second base course layer on the right side. This measurement is taken from the top of the pavement. If there is no second base course layer on the right side, a zero depth should be used. | Numeric | 0.0 |
| Right Depth to Subgrade | Depth to Subgrade Surface at the flange point on the left side. The depth specified here should be the depth to the bottom of the last base/subbase course layer. | Numeric, positive | 1.5 |
| Right Subgrade Width | Distance the base/subbase courses are extended beyond the back-of-curb on the right side. Use zero to terminate the base/subbase courses at the back-of-curb on the right side. If Full Depth Subgrade Through Median is True, this value is ignored. | Numeric, positive | 1.0 |
| Right Subgrade SE Method | Selects whether to use the superelevation definition for the baseline to define the slope of the subgrade surface or to set a numeric % slope value. User also has the option to set a parameter reference and use the Subgrade Slope of an adjacent lane to define the subgrade slopes. |
String, Combo List of Options: a) Fixed Slope; b) Use Right-Side Outside Lane SE; c) Use Right-Side Inside Lane SE; d) Use Left-Side Outside Lane SE; e) Use Left-Side Inside Lane SE; f) Use Right-Side Outside Lane SE multiplied by -1; g) Use Right-Side Inside Lane SE multiplied by -1 ; h) Use Left-Side Outside Lane SE multiplied by -1; i) Use Left-Side Inside Lane SE multiplied by -1 |
Use Left-Side Outside Lane SE |
| Right Fixed Subgrade Slope | Cross slope of the subgrade surface on Right side. This value is used if Fixed Slope is the Right Subgrade SE Method selected, or SE is not defined for the baseline alignment. | Slope | -2% |
| Median Slope Constraint | Determines whether the Slope from the Left Side, Slope from the Right Side or a computation for equal slopes should be used to define the links between the two backs of curb. When Equal Slopes is selected, Slope from Left Marked Point and Slope From Right Marked Point parameters are both ignored. | String Combo List of Options: Use Median Slope From Left, Use Median Slope From Right, Equal Slopes | Equal Slopes |
| Median Slope From Left | Slope of the link extending rightward from the top back of curb on the left side. | Slope | 4% |
| Median Slope From Right | Slope of the link extending leftward from the top back of curb on the right side. | Slope | 4% |
| Constraining Feature | Indicates whether an elevation or an offset should be used to constrain the valley point of the median. | String Combo List of Options: No, Elevation, Offset | No |
| Constraining Value | Numeric Elevation or Offset value from the baseline used as the constraint to define the valley point of the median. When Offset is specified as the Constraining Feature, a negative value indicates an offset to the left of the baseline. | Numeric | 10.0 |
| Full Depth Subgrade Through Median | When set to True, base/subbase course layers and the subgrade surface from the left side will connect with those layers on the right side, creating full-depth base course layers through the median. Described in more detail in Behavior section. | True / False | False |
| Pavement Depth | Depth of pavement. Runs between the back of the curb on the left side and back of curb on the right side. Measured from the top of the back of curb at the attachment side. Bottom of the Pavement will run parallel to the top of the pavement. | Numeric | 0.0 |
| Median Base Depth | Depth of Base in median, measured from top of median pavement. Only used when Full Depth Subgrade Through Median = False. | Numeric | 0.0 |
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.
| Parameter | Description | Status |
|---|---|---|
| Elevation Constraint for Median | Object that defines the elevation of the valley point of the median when Constraining Feature is set to Elevation ONLY. The following object types can be used as targets for specifying the elevations: profiles, 3D polylines, feature lines, or survey figures. | Optional |
| Offset Constraint for Median Center | Object that defines the horizontal location of the valley point of the median when Constraining Feature is set to Offset ONLY. The following object types can be used as targets for specifying the width: alignments, polylines, feature lines, or survey figures. | Optional |
Output parameters
None
Point, Link, and Shape codes
| Point/Link/Shape | Codes | Description |
|---|---|---|
| P1 |
Flange_Med_Left or Flange_Med_Right |
Flange point of the gutter |
| P2 |
Flowline_MedGutter_Left or Flowline_MedGutter_Right |
Gutter flowline point |
| P2 | (type)_(size)_(head ht)_(INT) | Feature line creator for identifying QTO pay item. ‘INT' suffix is only added to the code when Integral Curb (Y/N) input is "Y". |
| P3, P3A |
TopCurb_Med_Left or TopCurb_Med_Right |
Top-of-curb |
| P4 |
BackCurb_Med_Left or BackCurb_Med_Right |
Back-of-curb |
| P6 |
In_Pave1_CG_Med_Left or In_Pave1_CG_Med_Right |
Inside Point at the bottom of the flanged portion of the curb and gutter |
| P7 |
In_Base1_CG_Med_Left or In_Base1_CG_Med_Right |
Inside Point on Base Layer (optional) |
| P8 |
In_Base2_CG_Med_Left or In_Base2_CG_Med_Right |
Inside Point on Base Layer (optional) |
| P9 |
In_Sub_CG_Med_Left or In_ Sub_CG_Med_Right |
Inside Point on top of subgrade |
| P10 |
ETW_Sub_CG_Med_Left or ETW_Sub_CG_Med_Right |
Outside edge of subgrade under C&G |
| P11 |
ETW_Base2_CG_Med_Left or ETW_Base2_CG_Med_Right |
Outside edge of Base 2 layer under C&G |
| P12 |
ETW_Base1_CG_Med_Left or ETW_Base1_CG_Med_Right |
Outside edge of Base 1 layer under C&G |
| P13 |
ETW_Pave1_CG_Med_Left or ETW_Pave1_CG_Med_Right |
Outside Edge of top of first base layer under C&G |
| P14 |
ETW_Datum_CG_Left Or ETW_Datum_CG_Right |
When Full Depth Sugrade Thru Median is False, Outside Edge of the Datum surface behind C&G |
| P15 | CG_Terrace_Med | Terrace Point behind curb and gutter |
| P16 | None | |
| P17 | Med_Subg_Crown | Crown point of fingrnd surface in median |
| L1-L3 | Top, Curb | Finish grade on the curb and gutter |
| L4 |
Curb Datum |
|
| L5 |
Curb Pave1 |
|
| L6 | Curb | |
| L7 | Base1 | |
| L8 | Base2 | |
| L9 |
Datum Subbase SUBG |
|
| L10 | None | |
| L11 |
SUBG Subbase Datum |
When Full Depth Sugrade Thru Median is False, Link from point P10 to point P14 |
| L12 | Base1 | |
| L13 |
Datum Top |
When Full Depth Sugrade Thru Median is False and Pavement Depth = 0 |
| L13 |
Datum Top PaveMed |
When Full Depth Sugrade Thru Median is False and Pavement Depth > 0 |
| L13 | Top | When Full Depth Sugrade Thru Median is True and Pavement Depth = 0 |
| L13 |
Top PaveMed |
When Full Depth Sugrade Thru Median is True and Pavement Depth > 0 |
| L14 | Pave1 | When Pavement Depth > 0 |
| L15 | Datum | When Full Depth Sugrade Thru Median is False and Median Base Depth > 0 |
| L16 |
Datum Subbase SUBG |
When Full Depth Sugrade Thru Median is True, connects left side to right |
| L17 | Base2 | When Full Depth Sugrade Thru Median is True, connects left side to right |
| L18 | Base1 | When Full Depth Sugrade Thru Median is True, connects left side to right |
| L19 | Base1 | When Full Depth Sugrade Thru Median is True, connects left side to right |
| S1 | Base1 | Only created when Base Depth > 0 |
| S2 | Base2 | Only created when Base Depth and Subbase Depth are both > 0. |
| S3 | Subbase | If Base Depth and Subbase Depth are 0, Subbase is only shape created. |
| S4 | Pave1_Med | |
| S5 | Curb | |
| S6 | Base1 | When Full Depth Sugrade Thru Median is False and when Median Base Depth > 0 |