Channel Parabolic Bottom

C3D ChannelParabolicBottom — parabolic-bottom channel + lining

At a glance


Kind	Subassembly (composed into an assembly)
Domain	Road
Civil 3D equivalent	`ChannelParabolicBottom`
Geometry	28 points, 26 links, 1 shapes

Parameters

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

Parameter	Type	Default	Meaning
`Depth`	number (metres unless the description says otherwise)	6	Grade line to channel bottom corners (m)
`BottomWidth`	number (metres unless the description says otherwise)	6	Channel bottom width (m)
`Sideslope`	cross slope as a ratio (−0.02 = 2 % fall)	1	Channel side slope (rise/run)
`LiningDepth`	number (metres unless the description says otherwise)	0.33	Lining depth (m)
`LeftExtensionHeight`	number (metres unless the description says otherwise)	1.67	Left side extension above the insertion (m)
`LeftBackslopeWidth`	number (metres unless the description says otherwise)	5	Left backfill width (m)
`LeftBackslope`	cross slope as a ratio (−0.02 = 2 % fall)	0.25	Left backfill slope
`RightExtensionHeight`	number (metres unless the description says otherwise)	1.67	Right side extension above the insertion (m)
`RightBackslopeWidth`	number (metres unless the description says otherwise)	5	Right backfill width (m)
`RightBackslope`	cross slope as a ratio (−0.02 = 2 % fall)	0.25	Right backfill slope

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
`O`	—	placed at the attachment point (an absolute offset/elevation)	—	`0 / 0`
`P1`	Channel_Flowline	offset + elevation delta from the reference point	O	`0 / -(Depth+abs(Sideslope)*BottomWidth/4)`
`P2`	Channel_Bottom	offset + elevation delta from the reference point	O	`-BottomWidth/2 / -Depth`
`P3`	Channel_Bottom	offset + elevation delta from the reference point	O	`BottomWidth/2 / -Depth`
`P4`	Channel_Top	offset + elevation delta from the reference point	O	`-(BottomWidth/2+abs(Depth/Sideslope)) / 0`
`P5`	Channel_Top	offset + elevation delta from the reference point	O	`BottomWidth/2+abs(Depth/Sideslope) / 0`
`P10`	—	offset + elevation delta from the reference point	P4	`-LiningDepth / 0`
`P11`	—	offset + elevation delta from the reference point	P5	`LiningDepth / 0`
`P12`	—	offset + elevation delta from the reference point	O	`-(BottomWidth+LiningDepth)/2 / -(Depth+abs(Sideslope)*LiningDepth/2)`
`P13`	—	offset + elevation delta from the reference point	O	`(BottomWidth+LiningDepth)/2 / -(Depth+abs(Sideslope)*LiningDepth/2)`
`QO1`	—	offset + elevation delta from the reference point	O	`(BottomWidth+LiningDepth)-0.375 / -(Depth+abs(Sideslope)LiningDepth/2)-abs(Sideslope)(BottomWidth+LiningDepth)0.1094`
`QO2`	—	offset + elevation delta from the reference point	O	`(BottomWidth+LiningDepth)-0.25 / -(Depth+abs(Sideslope)LiningDepth/2)-abs(Sideslope)(BottomWidth+LiningDepth)0.1875`
`QO3`	—	offset + elevation delta from the reference point	O	`(BottomWidth+LiningDepth)-0.125 / -(Depth+abs(Sideslope)LiningDepth/2)-abs(Sideslope)(BottomWidth+LiningDepth)0.2344`
`QO4`	—	offset + elevation delta from the reference point	O	`(BottomWidth+LiningDepth)0 / -(Depth+abs(Sideslope)LiningDepth/2)-abs(Sideslope)(BottomWidth+LiningDepth)0.25`
`QO5`	—	offset + elevation delta from the reference point	O	`(BottomWidth+LiningDepth)0.125 / -(Depth+abs(Sideslope)LiningDepth/2)-abs(Sideslope)(BottomWidth+LiningDepth)0.2344`
`QO6`	—	offset + elevation delta from the reference point	O	`(BottomWidth+LiningDepth)0.25 / -(Depth+abs(Sideslope)LiningDepth/2)-abs(Sideslope)(BottomWidth+LiningDepth)0.1875`
`QO7`	—	offset + elevation delta from the reference point	O	`(BottomWidth+LiningDepth)0.375 / -(Depth+abs(Sideslope)LiningDepth/2)-abs(Sideslope)(BottomWidth+LiningDepth)0.1094`
`QI1`	—	offset + elevation delta from the reference point	O	`BottomWidth0.375 / -Depth-abs(Sideslope)BottomWidth*0.1094`
`QI2`	—	offset + elevation delta from the reference point	O	`BottomWidth0.25 / -Depth-abs(Sideslope)BottomWidth*0.1875`
`QI3`	—	offset + elevation delta from the reference point	O	`BottomWidth0.125 / -Depth-abs(Sideslope)BottomWidth*0.2344`
`QI4`	—	offset + elevation delta from the reference point	O	`BottomWidth0 / -Depth-abs(Sideslope)BottomWidth*0.25`
`QI5`	—	offset + elevation delta from the reference point	O	`BottomWidth-0.125 / -Depth-abs(Sideslope)BottomWidth*0.2344`
`QI6`	—	offset + elevation delta from the reference point	O	`BottomWidth-0.25 / -Depth-abs(Sideslope)BottomWidth*0.1875`
`QI7`	—	offset + elevation delta from the reference point	O	`BottomWidth-0.375 / -Depth-abs(Sideslope)BottomWidth*0.1094`
`P6`	Channel_Extension	offset + elevation delta from the reference point	P10	`-abs(LeftExtensionHeight/Sideslope) / LeftExtensionHeight`
`P8`	Channel_Backslope	offset + elevation delta from the reference point	P6	`-LeftBackslopeWidth / -abs(LeftBackslopeWidth*LeftBackslope)`
`P7`	Channel_Extension	offset + elevation delta from the reference point	P11	`abs(RightExtensionHeight/Sideslope) / RightExtensionHeight`
`P9`	Channel_Backslope	offset + elevation delta from the reference point	P7	`RightBackslopeWidth / -abs(RightBackslopeWidth*RightBackslope)`

Links

Link	Code	Between	Role
`LO0`	Datum	P12 → QO1	drawn
`LO1`	Datum	QO1 → QO2	drawn
`LO2`	Datum	QO2 → QO3	drawn
`LO3`	Datum	QO3 → QO4	drawn
`LO4`	Datum	QO4 → QO5	drawn
`LO5`	Datum	QO5 → QO6	drawn
`LO6`	Datum	QO6 → QO7	drawn
`LO7`	Datum	QO7 → P13	drawn
`L2`	Datum	P10 → P12	drawn
`L3`	Datum	P13 → P11	drawn
`L8`	Channel_Bottom,Top	P4 → P10	drawn
`L9`	Channel_Bottom,Top	P11 → P5	drawn
`L10`	Channel_Bottom,Top	P2 → P4	drawn
`L11`	Channel_Bottom,Top	P5 → P3	drawn
`LI0`	Channel_Bottom,Top	P3 → QI1	drawn
`LI1`	Channel_Bottom,Top	QI1 → QI2	drawn
`LI2`	Channel_Bottom,Top	QI2 → QI3	drawn
`LI3`	Channel_Bottom,Top	QI3 → QI4	drawn
`LI4`	Channel_Bottom,Top	QI4 → QI5	drawn
`LI5`	Channel_Bottom,Top	QI5 → QI6	drawn
`LI6`	Channel_Bottom,Top	QI6 → QI7	drawn
`LI7`	Channel_Bottom,Top	QI7 → P2	drawn
`L4`	Datum,Top,Channel_Side	P10 → P6	drawn
`L6`	Datum,Top,Channel_Side	P6 → P8	drawn
`L5`	Datum,Top,Channel_Side	P11 → P7	drawn
`L7`	Datum,Top,Channel_Side	P7 → P9	drawn

Shapes (materials)

Shape	Material code	Boundary points
`LM`	Lining_Material	P12, QO1, QO2, QO3, QO4, QO5, QO6, QO7, P13, P11, P5, P3, QI1, QI2, QI3, QI4, QI5, QI6, QI7, P2, P4, P10

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.