CGBasic

The CGBasic subassembly inserts points, links and shapes representing standard WisDOT concrete curb and gutter types with optional base course layers and terrace options. Dimensions of the curb and gutter are fixed shapes per WisDOT standard details and select municipal standards.

The CGBasic subassembly does not have parameters for base and subbase layers. This subassembly can be partnered with the LnExtendBase subassembly by attaching it to the inside or outside top pavement point. The LnExtendBase has options to extend the base and subbase layers under the curb.

Curb shape, gutter slope and dimensions are derived from WisDOT standard detail drawings as shown in the WisDOT Facilities Development Manual.

 

Curb Type

• WisDOT standard curb selection is determined by first setting the Curb and gutter size parameter to either Wi18, Wi30, or Wi36 and then setting the corresponding curb type parameter; Wi 18" Curb Types, Wi 30" Curb Types, Wi 36" Curb Types.
• Curb selection for Milwaukee County and City of Madison is determined by setting the Curb and gutter size parameter to one of the Mco# or Mad# options.

• The Profile target for curb height can be assigned an elevation target (a profile that defines an elevation) during the corridor build process and will override the gutter type curb height, and allow for creating curb height transitions.

Gutter slope

Bottom of curb link is always parallel to the gutter slope.

• When Gutter slope method is set to Standard, the slope of the gutter will adhere to the standard detail slope.
• When Gutter slope method is set to User defined, the user may define a slope by setting the User defined slope parameter or, once an Assembly has been built, the user may set a parameter reference for the User defined slope in the Assembly Properties.
• When Gutter slope method is set to any SEoption, the subassembly uses the baseline alignment SE to determine the gutter slope. When using any of the "Use opposite" designated parameters, the gutter slope is defined from the SE slope on the opposite side, multiplied by -1.0. A profile elevation target can be used to create or adjust curb slope transition.

• The Profile target for gutter slope can be assigned an elevation target (a profile that defines a slope as an elevation) during the corridor build process and will override any Gutter slope method parameter.

Terrace

The terrace is a link and a point at the end of the link that is inserted at a width and slope from the back of the curb.

• Terrace width defines the total width of the terrace.
• Terrace slope defines the slope of the terrace or the slope of the extended subgrade top link.
• Subgrade width defines a width the subbase layer extends beyond the back of the curb.
• Terrace width input is less than Subgrade width input, a link is inserted from the back of curb for a distance defined by the Subgrade width and a slope defined by the Terrace slope.
• When the Terrace width input is greater than the Subgrade width, a point is inserted on the terrace link defined by the Subgrade width.
• When the Terrace width is set to zero, and the Subgrade width is set to zero, a terrace width of 0.01 is created to allow for datum surface creation needs.

• Setting Add outside terrace link to marked point to Yes, creates the terrace link to a marked point. The marked point name is required in the Marked point target name parameter.

Terrace Subbase

The Terrace subbase thickness parameter can be set to define the thickness of the terrace subbase.

• When the Terrace width is not set to zero, links and a shape below the terraces link will be inserted.
• When a Subgrade width is defined the datum point will be inserted on the terrace subbase link instead of on the terrace (top) link.

The CGBasic has three attachment point options, at the gutter edge or flange, at the top back of the curb, or at the outside point of the terrace.

• When the Insertion point parameter is set to Gutter edge, the subassembly displays the curb & gutter component based on the parameters and targets selected.
• When the Insertion point parameter is set to Back of curb or Terrace, the subassembly displays the curb & gutter component based on the parameters selected, but the Profile target for curb height cannot be defined. The curb heights will remain at the selected curb type height.

Info: All dimensions are in feet unless otherwise noted. Curb & gutter dimensions are in inches. All slopes are in a percent slope designated with a "%" sign.

Parameter	Description	Type	Default
Side	Indicates which side the subassembly is inserted towards.	Left/Right	Right
Insertion Point		Combo List of options: Gutter edge ; Back of curb ; Terrace	Gutter edge
Curb and gutter size	Curb and gutter size is the horizontal distance from the back of curb to the flange of curb (inches).	Combo List of options: WI18 ; WI30 ; WI36 ; Mco19 ; Mco22 ; Mco24 ; Mco31 ; Mad30 ; Mad36 ; Mad42	WI30
Wi 18" curb types	Type of 18" WisDOT curb and gutter to construct.	Combo List of options: A; D	A
Wi 30" curb types	Type of 30" WisDOT curb and gutter to construct. The suffix "curb sloped" refers to the curb head.	Combo List of options: A ; D ; G 4" curb sloped ; G 6" curb sloped ; J 4" curb sloped ; J 6" curb sloped ; K ; K optional curb ; L ; L optional curb; TBT/TBTT	A
Wi 36" curb types	Type of 36" WisDOT curb and gutter to construct. The suffix "curb sloped" refers to the curb head.	Combo List of options: A 4" curb sloped ; A 6" curb sloped ; D 4" curb sloped ; D 6" curb sloped ; R ; T; TBT/TBTT	A 4" curb sloped
Gutter slope method	Specifies method of gutter slope calculation.	Combo List of options: Standard, User defined Use outside lane SE Use inside lane SE Use opposite outside lane SE x -1 Use opposite inside lane SE x -1 Use outside shoulder SE Use inside shoulder SE Use opposite outside shoulder SE x -1 Use opposite inside shoulder SE x -1	Use Outside Lane SE
User defined slope	Specifies gutter slope when Gutter slope method is set to User defined.	Slope	-2.00%
Subgrade width	Distance the base/subbase courses are extended beyond the back-of-curb. Use zero to terminate the base/subbase courses at the back-of-curb.	Numeric, Non-negative	2.0'
Terrace width	Width of the terrace, measured from the top of the back of curb.	Numeric, Non-negative	6.0'
Terrace slope	Slope of the terrace and top link of the Subgrade width if the Terrace width is set to zero.	Slope	4.00%
Terrace subbase thickness (inches)	Option to create a terrace subbase links and a shape.	Numeric, Non-negative	0.0"
Add outside terrace link to marked point	Option to create a terrace link to a marked point	Yes/No	No
Marked point target name	Name of marked point to target for terrace link	String	OTP

These are the parameters in this subassembly that can be mapped to a target object such as a alignment, polyline, feature line, or survey feature object in a drawing. For more information, see Setting and Editing Targets in the AutoCAD Civil 3D User's Guide Help.

Parameter	Description	Status
Terrace Width	May be used to override the terrace width and tie the outside edge of the terrace to an offset object. If insertion side is right, the object must be located to the right of the attachment point. If insertion side is left, the object must be located to the left of the attachment point. The following object types can be used as targets for specifying the width: alignments, polylines, feature lines, or survey features.	Optional
Curb height from profile	May be used to override the curb height and tie the curb height to a profile. The profile should be designed so the profile elevations define the curb height.	Optional
Gutter slope from profile	May be used to override the gutter slope and tie the gutter slope to a profile. The profile should be designed so the profile elevations defines a slope.	Optional
Terrace profile	May be used to override the terrace slope and tie the outer edge of the terrace to the elevation of an object. The following object types can be used as targets for specifying this elevation: profiles, 3D polylines, feature lines, or survey figures.	Optional
Terrace slope from profile	May be used to override the terrace slope and tie the terrace slope to a profile. The profile should be designed so the profile elevations define a slope.	Optional
Terrace width from profile	May be used to override the terrace width and tie the terrace width to a profile. The profile should be designed so the profile elevations defines a width.	Optional

Info: All dimensions are in feet unless otherwise noted. Slopes are in a percent slope designated with a "%" sign.

Parameter	Description	Type
Subgrade width [Output]	Width of the subgrade extended behind the curb.	Numeric
Terrace slope [Output]	Slope of the terrace and top of subgrade width if the terrace width is set to zero.	Slope

Point/Link/Shape	Codes	Description
P1	Flange	Flange point of the gutter
P2	Flowline_Gutter	Gutter flowline point
P21	TopCurb	Top of curb point
P22	FaceCurb	Face of curb point
P3	BackCurb	Top back of curb point
P4	Uncoded	Flange cub base
P5	Uncoded	Back of curb base
P6	ETW_Datum_CG	Subgrade width point on top terrace link, or on bottom of terrace subgrade if a terrace subgrade thickness is defined.
P7	CG_Terrace	Terrace top end point
P9	Top	Outside point, link to marked point
P30	Uncoded	Inside subgrade terrace point
P31	Terrace_Sub	Outside subgrade terrace point
L1	Top, Gutter	Link from flange to flowline
L2	Top, CrbFc	Curb face
L21	Top, CrbTprFc	Top of curb link
L22	Top, CrbTprFc	Face of curb link
L23	Top, TopOfCrb	Taper of curb face link
L5	Uncoded	Back of curb
L8	Top, CGTRC, TOPDATUM	Top of terrace
L9	Uncoded, CGTrcLnk	Link to marked point
L30	Terrace_Sub, Datum	Subbase terrace link
L31	Uncoded	Outside depth of terrace subbase
L32	NoDisplay	Inside depth of terrace subbase
S1	Curb	Curb
S2	Uncoded	Terrace subgrade