Trail Design / Daylight

[Anonymous]

Hi All, 

I am having some trouble choosing a daylight sub assembly. My goal is a 10 wide trail ( nailed that down) with 2  3' shoulders at a max 6:1 and then 3:1 to existing grade. The shoulders are giving me trouble as the max6:1 for 3feet changes in slope direction (ie. toward and away from trail) and then needs to jump to 3:1.

Any help out there?

CHeers, 

[Civil3DReminders_com]

I think your best bet would be to use a conditional height subassembly to check the height and then to use the a daylight subassembly for the appropriate case. 

https://knowledge.autodesk.com/support/autocad-civil-3d/learn-explore/caas/CloudHelp/cloudhelp/2017/...

[Mike.M.Carlson]

Hi-

Another option to consider is using Subassembly Composer for this.  You can still use the trail (10' wide) subassembly, but for your daylight scenarios, this helpful short video open your mind to the possibilities in SAC.

https://www.youtube.com/watch?v=CLVR4AIH_jQ

I hope this helps.

[Jeew-m]

Dear Friend,

Hope this video will help you.

Thanks

[KMercier_C3D]

Another option is to carry the slope of the trail as the slope of the shoulder so that they are both sloping the same direction. You can do this by going to the Assembly Properties and on the shoulder subassembly scrolling to the slope and checking the box for "Use Parameter Reference" and then from the dropdown select the slope output parameter from your trail. 

If you wanted the crossslope of the shoulder to be different than the crossslope of the trail but you wanted them both sloped the same direction you could definitely do this in Subassembly Composer. In SAC you would make an Input Parameter for Trail Cross Slope (which in Civil 3D you would override using the Use Parameter Reference as noted above) as well as Input Parameters for your Shoulder Cross Slopes. Then in SAC you would use a decision or equation to determine if the Trail Cross Slope is positive or negative and associate the same positive or negative to the Shoulder Cross Slope value. 

[Anonymous]

Awesome recommendations everyone! I end up with a daylight general with my first cut/fill width set to 3' with 6:1 slope and then daylighting at 3:1.

I didn't even know about the Sub Assembly Composer, and the youtube channel is great! It will sure help me a lot. 

I do seem to be running into the contours not tying in.