topic Re: daylight subassembly in Civil 3D Forum

daylight subassembly

demus72 — Tue, 12 Jun 2018 15:50:55 GMT

I am building a corridor where the engineer wants varying cut slopes at certain distances. The first five feet will be cut at 5:1. From five to ten feet the cut slope will be 4:1. From ten to fifteen feet feet the cut slope will be 3:1. It can daylight to the surface at any distance within the 15 feet. He doesn't want a basin or ditch just different cut slopes every 5 foot. All fill situations will fill at 6:1 slope. What daylight subassembly would you recommend?

Thanks

Re: daylight subassembly

Jeew-m — Tue, 12 Jun 2018 16:07:52 GMT

Dear Friend,

Try this video and create your own one.

Thanks

Re: daylight subassembly

seanp.fahey — Tue, 12 Jun 2018 16:13:48 GMT

I would use a conditional cut or fill subassembly that has a fill condition be a 6:1 slope (using a link slope to surface subassembly that has a 16.67% (6:1) slope. The cut condition will have the following subassemblies:

I would use a link width slope subassembly, where the first 5-ft, the slope is 20% (5:1). Then add another link width and slope subassembly for another 5-ft, slope at 25% (4:1). Then add a link slope to surface subassembly that ties to existing grade with a 33% (3:1) slope.

Re: daylight subassembly

KMercier_C3D — Tue, 12 Jun 2018 19:41:48 GMT

@seanp.fahey that would not account for if the surface intersects in the 20% or 25% links though.

Re: daylight subassembly

demus72 — Tue, 12 Jun 2018 20:04:19 GMT

Thank you for the reply. Let me explain a little further. I need to create the corridor with a daylight that grades out at 5:1 for 5 feet. This would be the criteria as the corridor transitions from a fill situation to a cut. This 5:1 could intersect the existing ground anywhere from 0 feet to 5 feet horizontal and terminate. If the existing ground surface doesn't intersect within the 5 feet, as the corridor cuts deeper into the surface, it would daylight anywhere within the next 5 feet at a 4:1. Beyond 10 feet horizontal, the third criteria would be daylight to the existing ground surface at 3:1 slope. Attached is a screen shot of what the daylight requirements are.

Thank you

Re: daylight subassembly

KMercier_C3D — Tue, 12 Jun 2018 20:28:17 GMT

Are you only looking to be able to create this with stock subassemblies? Are you open to using Subassembly Composer to generate a custom pkt subassembly?

This would be simple to create in SAC:

-Create Target Parameter: ExistingSurface

-Create Input Parameters: Slope1, Slope2, Slope3, HorizontalForSlope1, HorizontalForSlope2

-Add point P1 at origin.

-Add AP1 slope to surface to existing using Slope1 with AL1..

-Add decision (AL1.xlength>=HorizontalForSlope1)

-TRUE: Add point P2 from P1 at Slope1 for HorizontalForSlope1 and add a AP2 slope to surface using existing Slope2 with AL2 and then another decision similar to this one to test if Slope3 is needed.

-FALSE: From P1 slope to surface P2. [truncate in slope 1]

Re: daylight subassembly

demus72 — Tue, 12 Jun 2018 20:43:35 GMT

Thanks for the reply Kati. I had hoped there was an out of the box subassembly to accomplish this. I had strung three conditional subassemblies together but can't seem to make them work.

I've never used the subassembly composer but I will give it a shot.

Thank you for the suggestion.

Re: daylight subassembly

seanp.fahey — Tue, 12 Jun 2018 22:17:21 GMT

Yes I agree, the thought occurred to me, but without project context it would be hard to understand this design. Your last reply was my first thought, but figured I would get him going with something simple.