Ductwork Transition Issues

[Anonymous]

Hi everyone.

In my Revit 2012 MEP program, I want to add a rectangular length transition to my ductwork, however I am having a lot of troubles with the family.

Firstly, the family doesn't show on my drawing regularly, only in the hidden view. I am not sure if this has something to do with the family, or if the program itself rejected it (I originally had Revit 2010 MEP, but needed to update). Is there any way for this to show in plain view, without having to try and modify everything in the hidden view?

Secondly, when I want to attach a piece of ductwork to the transition using point connectors, it continuously comes up with the error message "no auto solution found", and I am forced to cancel what I draw. When I manage to make a connection with the fitting, however, it instantly turns itself into an angle transition, rather than a length transition, which isn't what I would like to place on my drawing. I managed to temporarily return it to a length-style transition, but then the first problem (not showing on plain view, only in hidden view) occurs. Again, I believe this may have something to do with the family itself, but I am unsure of a solution. This issue also occurs with rectangular eccentric transitions. It appears as though I can only use rectangular angle transitions without any issues.

Any help on these problems would be greatly appreciated.

[Anonymous]

You can create as many types of duct as you like. Each duct type can have different fittings associated to them.

Select the duct and go to Edit Type. In there you can assign the fittings, like the transition.

Do not place the transition onto the end of modeled duct. Let Revit place the transition while modeling.

Example:

Model a 24x12 inch duct 10' long. Split the duct in the middle and select the right portion and change its size to 12x12. Revit will place the transition.

Model a 24x12 inch duct 5' than select a new size and revit will place the transition.

So in the instance where you are trying to model new duct at the end of the transition... Don't.

Delete the transition and start modeling then smaller duct. revit will place the transition.

The eccentric issue.

Each duct portion can have different justifications. You have to be certain that the entire duct system has the same justification or else your going to get errors.

The visibility issue.

This sounds like a graphics issue. Have you tried toggling your Use Hardware Acceleration? You will have to re-start revit for this to take effect.

[Anonymous]

Thank you very much for the help here. Are these the same solutions to drawing vertical offsets (set up or set down) in my ductwork as well?

[Anonymous]

Yes,

You just model them in section.

[Anonymous]

Since I've had the issue with the visibility of the ductwork transitions, I have upgraded the video card driver to the recommended driver for MEP 2012, however I am still unable to view the transitions outside of the hidden view.

I'm starting to think it might be an internal program issue. Any suggestions on this issue would be greatly appreciated.

[Anonymous]

---

@Anonymous wrote:

" however I am still unable to view the transitions outside of the hidden view."

Are you saying that you cannot see the transitions in any other visual style other than hidden?

Can you provide a snap shot?

[Anonymous]

I have provided 2 snapshots in this attachment, the first one is the hidden view (equipment and ductwork shown in hidden), and the second is the standard view.

In the standard view, it is possible to see the internal lining in the transition, however the sheetmetal of the transtion is not visible, until I enter hidden view, where both are visible.

[JDeAngelo_JIG]

Just a thought... is the family your own design? and what family category did you place it under?

the reason it shows in a hidden view only could be it's not a family you've opted to show in that view.

[Anonymous]

The family used there is a version of the rectangular length transition. I did make my own version of this family (which is the one shown in the snapshots) however the problem persists with the original family as well.

[Anonymous]

The view with the red outline isn't hidden view it's reveal hidden elements.

This tells me that somewhere either in your project or in the family there is an incorrect visible setting.

I would check the family and make sure that the transition is visible in plan.

Also check you visibility graphics and make sure the transition is visible.

If you can, upload the family here and someone can check it out.

[Anonymous]

I have uploaded the standard family that comes with the program, and the family that I used in the snapshots above, which is derived from the standard family.

[Anonymous]

Just wondering if there is any updates to the issues regarding the two transitions above.

[Anonymous · Accepted solution]

I forgot to get back.

There is something interesting about those fittings.

Go into the family and select everything-->filter for other-->Make sure visible is checked-->Go to visibility graphic overrides and make sure the 3D model (other) is visible in all view directions. Also take a look at the insulation properties.

I went in and did this same thing and it worked, other than I was getting an insulation line cutting directly through the middle of the fitting, only in section. weird.