RISA 3D import/export issues...

[hand471037]

So I'm working with a local new development company focusing on high-end eco-friendly homes. These homes are steel framed, and are being done in Revit. The structural engineer is using RISA 3D, latest version.

We're able to export our Revit models to him via Revit Structure without issues via the RISA plug-in. It's a nice workflow, and it saves him a lot of time.

However, when we re-import his edited RISA model back into ours, we're getting strange problems with the model. It appears that the Analytical model is 100% right, with all the lines representing beams and such in the correct place. However, the beams themselves seem 'off'; some are sloping incorrectly (the start and end points appear off from the Analytical model) and many are rotated 90 degrees or more off the plane of the Analytical model altogether.

Wondering if this is due to our initial 'sketch' of a steel frame for the building that was pulled into RISA to begin with was too 'sloppy', or if there is something else going on. Also, wondering if there is an easy way to 'correct' our beams to get them to match the Analytical model 100%.

Thanks!

[hand471037]

Sorry to reply to my own message, but a little more info.

It appears that the only beams that are off are ones that were sloped for the roof. I believe that they were sloped via vertical offsets, and not by being hosted to a sloped reference plane (the better approach I believe). When I set their vertical offset for the ends back to 0 for start and finish, the beam rotates back into proper alignment, and then when I change the values back to what they were prior, I get the beam to be in the proper location and with the proper rotation.

Anyone else experience strange things with sloped beams and RISA 3D?

[daniel.tansey187405]

I seem to be having similar problems. I'm working on a truss and the web comes in correct, but the sloping top and bottom cords are off even though the lateral justification is set to "center". Anyone else have a quick turn around? Is it Revit or Risa?

[Mitesh]

Strange!!!

I have made a prototype model which is having slope in revit. And then exported it in Risa 3D. After sloving Windload combination in it. I get the results and imported back in to Revit. And the model is updated perfectly. I am not having any issues with rotation and alignment of Anylitical/Physical model. One suggestion, Please check box on "Update member sizes only" when importing back into revit.

Let me know if you are still facing the problem. I will send prototype model.
Thanks
Mitesh

[trialbyfire]

RISA has made some online videos on best-practices for exporting and round-tripping models between Revit to RISA.

Which version of Revit are you using? If it's 2013, might want to keep an eye on this Jan 17th RISA Webinar: http://www.risatech.com/webinar/upco...#webinar_jan17

Here's a link to a free, already recorded Webinar for a previous version of Revit (2010 or 11 probably. It doesn't say in the title. Scroll down to the video posted on 11/30/2010): https://risatech.webex.com/mw0307l/m...teurl=risatech