Elevating an irregular shape .50' above surface elevations

[PEGAdevelopment]

I am trying to create a curb island in the middle of a parking lot. I have a surface for the parking lot, but need to add the irregular shape (island) at .50' above the surface elevations. See attached.

 

I was thinking there was a way to do this with the grading creation tools, but now I'm not so sure...

[sandiegophil]

I've done it with a feature line - add as a breakline - add intermediate points - then use elevation editor - grade to surface at .01:1 - then infill

[Organic]

The question I would be asking is why do you need to do it? It won't matter in the grander scheme of things if your parking stall island is not modelled 150mm above the surrounding pavement levels. The contractor will be more interested in the spot levels you provide fro the island on the 2d plans than how pretty it looks in 3D.

 

If I was to do it I would manually set my levels and create a surface from them that represents the island. Then merge that surface together with the carpark pavement surface to get a combined surface.

[PEGAdevelopment]

Because it is my job. That is why. We are loading it to a grader with GPS attached to the blade. It cuts it exactly as modeled.

 

I've been doing it with feature lines (one for the top of curb, one for the flowline), but was wondering if grading tools could get it done easier, but wasn't sure... Maybe the "grade to relative elevation" criteria will do it.

 

 

sandiegophil- Thank you sir, I will give that a try.

[Organic]

We are loading it to a grader with GPS attached to the blade. It cuts it exactly as modeled.

 

I've done plenty of 3d gps machine control setout. There is no point modelling a kerb island like that as the earth there will still have to be stripped back for the concrete pour (or kerbing machine, depending upon what is used). While I'm no grader operator, in my opinion modelling the island will actually make it harder, not easier for him or her.

 

Because it is my job. That is why.

 

Now that is a good reason

[JerryG]

Just a thought but can you create it as a Corridor?

I havnt done an island like that yet but wonder if you could follow the same procedure

as a regular road corridor but just use the Curb return Assembly????

[Organic]

Just a thought but can you create it as a Corridor?

I havnt done an island like that yet but wonder if you could follow the same procedure

as a regular road corridor but just use the Curb return Assembly????

 

You can. I've done it like that before on a few jobs (roundabout splitter islands etc) although have found it is usually not worth the trouble and that it is easier to just manually add a few points and manually specify the design levels.

 

I personally couldn't be bothered trying to fully model the concrete island in that carpark given the small size of it. Would just have to ensure (i.e. back of the envelope calculation) that 'v' part of the island drains away from the island and that water doesn't pool there.