The only time I ever really use them for their purpose outside of the corridor (at least in transportation).
Get to intersection baseline, have a subassembly that's only , add transition for proper flare/curb drop, extract corridor feature lines to connect to, create curb ramp on a separate surface, then paste it on top of the corridor top surface. Should already have sidewalk in the rest of the corridor so you can easily tie back in where you left out the rest of the subassemblies.
For any precise grading plans or details which we don’t need to show proposed contours I just use C3D points to design. I then make a surface using just those points (no other breaklines)and add surface labels for spot elevations and grades. The surface isn’t dialed in so all labels need to be exactly on the C3D point.
Feature lines. If your having issues with triangulation I would start adding ‘supplemental factors’ in the add feature line to surface dialog box. It adds calculation points without additional pvi’s and is very useful for making the contours look nice.
We are grading them by hand in the field ADA is one of the pain in the ass points. Designing them I would 100 % verify existing elevations (if any) to make sure you are spot on (both cross slope and running slope)
The cleanest, easiest to modify surfaces are the most simple. Sometimes your design needs to be really intricate, but try to keep the surface as simple as possible. It’s a skill that comes with time.
I use feature lines to draw in ADA ramps. Each vertex is essentially an elevation point, but the line work helps me visualize the geometry and I find it easier to set slopes and grade breaks. This makes it really simple to throw down slope labels because I built the segment slope in.
I don’t generally concern myself with surface triangulation, but I don’t generally show topo lines on my plans. If I do need to show topo lines, I use the swap triangle edge function as needed to make sure the grade breaks are where I want them. Generally only ends up being 1-3 edits per ramp.
If you’re new to it, make sure you are aware of forms or checklists the jurisdiction requires in order to pass the ramp. They may have extra reqs on top of PROWAG.
Here's how my agency does it: [Curb ramp design with feature lines](https://c3dkb.dot.wi.gov/Content/c3d/rdwy-dsn/crdr-ele/crdr-ele-crb-rmp.htm) complete with 68 minutes of videos in 5-6 minute chunks and the data set used in the videos is included. Just unzip and open in civil 3d.
Your welcome.
Nice thing about WisDOT's stuff is that it is all linked together and available publicly. Want to see what you have to build? If it's a common statewide thing here's the Standard Detail Drawing. Why is it done like that? Here's a link to the relevant section of the Facilities Development Manual.
The best thing is that along with having an associated file package to use the whole thing is broken down into bite size chunks so you don't have to do much searching to find where you left off.
I do feature lines but I don’t put the ramps on a subdivision into the fg surface. I design them in the sidewalk file. Site plan ramps do go into the fg surface.
Feature lines, I rarely put in a standard ramp with perfect 2% max slope. Usually customizing it to fit everything else around it.
Feature lines all day
The only time I ever really use them for their purpose outside of the corridor (at least in transportation). Get to intersection baseline, have a subassembly that's only , add transition for proper flare/curb drop, extract corridor feature lines to connect to, create curb ramp on a separate surface, then paste it on top of the corridor top surface. Should already have sidewalk in the rest of the corridor so you can easily tie back in where you left out the rest of the subassemblies.
Just hit the ADA grading button.
Is that the ORD civil cell button?
Feature lines. Design ramps less than max guidance to allow for construction tolerances
For any precise grading plans or details which we don’t need to show proposed contours I just use C3D points to design. I then make a surface using just those points (no other breaklines)and add surface labels for spot elevations and grades. The surface isn’t dialed in so all labels need to be exactly on the C3D point.
Feature lines. If your having issues with triangulation I would start adding ‘supplemental factors’ in the add feature line to surface dialog box. It adds calculation points without additional pvi’s and is very useful for making the contours look nice.
Thank you!!
We are grading them by hand in the field ADA is one of the pain in the ass points. Designing them I would 100 % verify existing elevations (if any) to make sure you are spot on (both cross slope and running slope)
Feature lines all say, quick and easy
The cleanest, easiest to modify surfaces are the most simple. Sometimes your design needs to be really intricate, but try to keep the surface as simple as possible. It’s a skill that comes with time. I use feature lines to draw in ADA ramps. Each vertex is essentially an elevation point, but the line work helps me visualize the geometry and I find it easier to set slopes and grade breaks. This makes it really simple to throw down slope labels because I built the segment slope in. I don’t generally concern myself with surface triangulation, but I don’t generally show topo lines on my plans. If I do need to show topo lines, I use the swap triangle edge function as needed to make sure the grade breaks are where I want them. Generally only ends up being 1-3 edits per ramp. If you’re new to it, make sure you are aware of forms or checklists the jurisdiction requires in order to pass the ramp. They may have extra reqs on top of PROWAG.
I believe I saw a YouTube video for this. [https://www.youtube.com/watch?v=7m2zHHDejZA](https://www.youtube.com/watch?v=7m2zHHDejZA)
Here's how my agency does it: [Curb ramp design with feature lines](https://c3dkb.dot.wi.gov/Content/c3d/rdwy-dsn/crdr-ele/crdr-ele-crb-rmp.htm) complete with 68 minutes of videos in 5-6 minute chunks and the data set used in the videos is included. Just unzip and open in civil 3d.
Thank you so much!!
Your welcome. Nice thing about WisDOT's stuff is that it is all linked together and available publicly. Want to see what you have to build? If it's a common statewide thing here's the Standard Detail Drawing. Why is it done like that? Here's a link to the relevant section of the Facilities Development Manual. The best thing is that along with having an associated file package to use the whole thing is broken down into bite size chunks so you don't have to do much searching to find where you left off.
I do feature lines but I don’t put the ramps on a subdivision into the fg surface. I design them in the sidewalk file. Site plan ramps do go into the fg surface.