Overlay Parabolic

C3D OverlayParabolic — overlay whose surface is a parabola between the two flanges

At a glance


Kind	Subassembly (composed into an assembly)
Domain	Road
Civil 3D equivalent	`OverlayParabolic`
Geometry	19 points, 18 links, 1 shapes
Targets	4 (surface / offset / elevation targets this subassembly can be linked to)

Parameters

Defaults are the metric values the palette inserts. Every parameter can be driven by an expression or a target.

Parameter	Type	Default	Meaning
`LeftFlangeOffset`	number (metres unless the description says otherwise)	-7.2	Left flange of the existing pavement (m)
`RightFlangeOffset`	number (metres unless the description says otherwise)	7.2	Right flange of the existing pavement (m)
`CrownHeight`	number (metres unless the description says otherwise)	0.1	Mid-ordinate of the parabola (m)
`MinSlope`	cross slope as a ratio (−0.02 = 2 % fall)	-0.01	Flattest slope before the stock warns
`MaxSlope`	cross slope as a ratio (−0.02 = 2 % fall)	-0.04	Steepest slope before the stock warns
`OverlayDepth`	number (metres unless the description says otherwise)	0.025	Overlay thickness (m)

Points

Point codes are what feature lines, styles and quantity take-off match on — they are the contract this subassembly publishes.

Point	Code	Placed	From	Expression
`P0`	—	placed at the attachment point (an absolute offset/elevation)	—	`0 / 0`
`T0`	ETW	offset + elevation delta from the reference point	P0	`LX+(RX-LX)(0.0/8.0) / (4CrownHeight/(RX-LX))(RX-LX)(0.0/8.0)-(4CrownHeight/(RX-LX))(RX-LX)(0.0/8.0)(RX-LX)(0.0/8.0)/(RX-LX)+LY+(RY-LY)(0.0/8.0)`
`B0`	ETW_Overlay	offset + elevation delta from the reference point	T0	`0 / 0-OverlayDepth`
`T1`	—	offset + elevation delta from the reference point	P0	`LX+(RX-LX)(1.0/8.0) / (4CrownHeight/(RX-LX))(RX-LX)(1.0/8.0)-(4CrownHeight/(RX-LX))(RX-LX)(1.0/8.0)(RX-LX)(1.0/8.0)/(RX-LX)+LY+(RY-LY)(1.0/8.0)`
`B1`	—	offset + elevation delta from the reference point	T1	`0 / 0-OverlayDepth`
`T2`	—	offset + elevation delta from the reference point	P0	`LX+(RX-LX)(2.0/8.0) / (4CrownHeight/(RX-LX))(RX-LX)(2.0/8.0)-(4CrownHeight/(RX-LX))(RX-LX)(2.0/8.0)(RX-LX)(2.0/8.0)/(RX-LX)+LY+(RY-LY)(2.0/8.0)`
`B2`	—	offset + elevation delta from the reference point	T2	`0 / 0-OverlayDepth`
`T3`	—	offset + elevation delta from the reference point	P0	`LX+(RX-LX)(3.0/8.0) / (4CrownHeight/(RX-LX))(RX-LX)(3.0/8.0)-(4CrownHeight/(RX-LX))(RX-LX)(3.0/8.0)(RX-LX)(3.0/8.0)/(RX-LX)+LY+(RY-LY)(3.0/8.0)`
`B3`	—	offset + elevation delta from the reference point	T3	`0 / 0-OverlayDepth`
`T4`	Crown	offset + elevation delta from the reference point	P0	`LX+(RX-LX)(4.0/8.0) / (4CrownHeight/(RX-LX))(RX-LX)(4.0/8.0)-(4CrownHeight/(RX-LX))(RX-LX)(4.0/8.0)(RX-LX)(4.0/8.0)/(RX-LX)+LY+(RY-LY)(4.0/8.0)`
`B4`	Crown_Overlay	offset + elevation delta from the reference point	T4	`0 / 0-OverlayDepth`
`T5`	—	offset + elevation delta from the reference point	P0	`LX+(RX-LX)(5.0/8.0) / (4CrownHeight/(RX-LX))(RX-LX)(5.0/8.0)-(4CrownHeight/(RX-LX))(RX-LX)(5.0/8.0)(RX-LX)(5.0/8.0)/(RX-LX)+LY+(RY-LY)(5.0/8.0)`
`B5`	—	offset + elevation delta from the reference point	T5	`0 / 0-OverlayDepth`
`T6`	—	offset + elevation delta from the reference point	P0	`LX+(RX-LX)(6.0/8.0) / (4CrownHeight/(RX-LX))(RX-LX)(6.0/8.0)-(4CrownHeight/(RX-LX))(RX-LX)(6.0/8.0)(RX-LX)(6.0/8.0)/(RX-LX)+LY+(RY-LY)(6.0/8.0)`
`B6`	—	offset + elevation delta from the reference point	T6	`0 / 0-OverlayDepth`
`T7`	—	offset + elevation delta from the reference point	P0	`LX+(RX-LX)(7.0/8.0) / (4CrownHeight/(RX-LX))(RX-LX)(7.0/8.0)-(4CrownHeight/(RX-LX))(RX-LX)(7.0/8.0)(RX-LX)(7.0/8.0)/(RX-LX)+LY+(RY-LY)(7.0/8.0)`
`B7`	—	offset + elevation delta from the reference point	T7	`0 / 0-OverlayDepth`
`T8`	ETW	offset + elevation delta from the reference point	P0	`LX+(RX-LX)(8.0/8.0) / (4CrownHeight/(RX-LX))(RX-LX)(8.0/8.0)-(4CrownHeight/(RX-LX))(RX-LX)(8.0/8.0)(RX-LX)(8.0/8.0)/(RX-LX)+LY+(RY-LY)(8.0/8.0)`
`B8`	ETW_Overlay	offset + elevation delta from the reference point	T8	`0 / 0-OverlayDepth`

Links

Link	Code	Between	Role
`LT1`	Top,Pave	T0 → T1	drawn
`LB1`	Overlay	B1 → B0	drawn
`LT2`	Top,Pave	T1 → T2	drawn
`LB2`	Overlay	B2 → B1	drawn
`LT3`	Top,Pave	T2 → T3	drawn
`LB3`	Overlay	B3 → B2	drawn
`LT4`	Top,Pave	T3 → T4	drawn
`LB4`	Overlay	B4 → B3	drawn
`LT5`	Top,Pave	T4 → T5	drawn
`LB5`	Overlay	B5 → B4	drawn
`LT6`	Top,Pave	T5 → T6	drawn
`LB6`	Overlay	B6 → B5	drawn
`LT7`	Top,Pave	T6 → T7	drawn
`LB7`	Overlay	B7 → B6	drawn
`LT8`	Top,Pave	T7 → T8	drawn
`LB8`	Overlay	B8 → B7	drawn
`LE`	—	T8 → B8	drawn
`LS`	—	B0 → T0	drawn

Shapes (materials)

Shape	Material code	Boundary points
`S1`	Overlay	T0, T1, T2, T3, T4, T5, T6, T7, T8, B8, B7, B6, B5, B4, B3, B2, B1, B0

Generated page. The tables above are read from the built-in catalogue itself (yu3d_stock_dump), so they always match the version of yucad3d you are running.