Folks:
As I have recently been developing the Subsurface Utilities *.dgnlib for use at our firm, I have noticed that there does not seem to be a command set/ availability to place a Reinforced Concrete Box ("R.C.B". here in Oklahoma) structure. Am I missing something here, or does the current version of OpenRoads Designer Connect Edition (2019 R1) not have the ability to do such? If it cannot place/ design an R.C.B., are there future plans to implement this often needed structure?
Thanks!
Mark
It can. You will need to define box shaped conduits of course. And you will need feature definitions for the various head walls. This is the worst part since box culvert head walls have so many variations. It can take a day or three to produce the variations needed.
Then the workflow for laying out is: place the two head walls inlet and outlet, then connect a conduit between them. For large boxes at severe skew angles, the models can be less than perfect as it slices the conduit at a skew. Just keep in mind that the models are not shop drawings. If the 3D model is too ugly for your taste then see alternate workflow below.
For hydraulic calculations you need to go into the utility property panel and change the flag "Is Conduit" from false to true. This changes the hydraulic calcs from HEC 22 to HY8. (Oversimplified statement I am sure). Keep in mind that for large boxes, and large flows, that you may need a more rigorous calculations engine than included in OpenRoads.
Alternate: Layout headwalls and conduit same as above except, use generic feature definitions which are not defined for 3D details. These feature defintions need to contain all the proper hydraulic properties but for 3D just make a small dot for the head walls. Use this layout for hydraulic calcs only. Then make the 3D model using Microstation 3D feature modeling tools. The advantage of using the MS 3D tools is that you could build dimension driven models so that you don;t have to build so many variations up front.
Robert Garrett Senior Consultant
www.envisioncad.com
Thank you so much for answering my call, Robert, and for providing such detailed statements of the steps involved. I will be sure to bookmark this conversation!
Thanks Again!
Regards,
Hi.. Can any one help me in creating 3D box culvert for corridor... i am looking for workaround process for making 3D box culvert in the corridor....
Robert:
I have noticed something with all of my headwalls which may or may not be anticipated behavior. When one places a headwall in plan view, there are options for Elevation and Rotation. When I place one at a specified elevation, the consistent behavior I see is that the elevation in 3D is at the top of the headwall, not the invert. Such does not really matter much as it is the pipes/ boxes which actually determine the headwall elevations (and the headwalls do act in accordance to the invert flowlines just fine). Not only do my constructed headwalls act in the manner, but all of the default SUDA models act this way as well. I do suppose that one might desire to use the elevation of the model to determine the headwall tie in and then it would drop the inverts accordingly. Is such the idea here?