topic Re: Ducting Size Change in Revit Architecture Forum

Ducting Size Change

Anonymous — Fri, 13 Nov 2015 07:36:40 GMT

Please excuse me if I'm being a bit stupid, but I'm a newcomer to Revit and I want to draw out some ducting runs. I can't find any tapered transition fittings to step down the duct size in the middle of the run. Can anyone tell me please how or where I can do this? As an example, in one duct run it starts at 400mm dia and then reduces to 300mm.

Thanks very much in anticipation.

Re: Ducting Size Change

L.Maas — Fri, 13 Nov 2015 08:58:39 GMT

We all started with Revit sometime and struggeld to move forward.

When you create ducting (or pipe) runs you will have to set up your routing preferences for your ducts/pipes. If needed, you have to load the proper fittings before you can use them in the routing preferences

Re: Ducting Size Change

tuuletin — Fri, 13 Nov 2015 09:05:40 GMT

Check out the Properties palette, there should be the property responsible for the length of duct accessory (diameter change from 400 to 300 mm).

Pay attention that this length will not be taken into account it "Duct length" shedule.

Updated

Sorry, didn't get you clearly. Thought, you want something like pic-attached.

Re: Ducting Size Change

Anonymous — Fri, 13 Nov 2015 09:16:03 GMT

Thanks for the reply. Yes, the sketch you included is exactly what I need. My problem is that I cannot find this type of fitting in the fittings to load it, there are only branches and bends listed in the accessories.

Re: Ducting Size Change

Anonymous — Fri, 13 Nov 2015 09:22:00 GMT

Thanks for the reply. I've located the options for editing the pipe but in the transitions drop down box there aren't any options, it just lists 'none' as the choices available.

I've been looking for fittings to accomplish it as well but all I have listed are bends and branches.

Is there something else that I have to load to get more options?

Thank you for your help.

Re: Ducting Size Change

tuuletin — Fri, 13 Nov 2015 09:24:43 GMT

Load thus duct fitting (diameter change) to you project.
For example, you can load this standard duct accessory (or in the future create it by your own) from the default library, installed with revit.

Check "Duct fittings" on your computer: C:\ProgramData\Autodesk\RVT 2015\Libraries.

Re: Ducting Size Change

Anonymous — Fri, 13 Nov 2015 09:36:32 GMT

Thanks for the response. The only folders I have in this folder are fittings for Bends, Blank Ends and Branches, none of which seem to contain transition pieces

Re: Ducting Size Change

tuuletin — Fri, 13 Nov 2015 10:28:58 GMT

A you sure, that you have the complete library?

https://knowledge.autodesk.com/support/revit-products/troubleshooting/caas/sfdcarticles/sfdcarticles/Cant-find-the-Library.html

Also, do you start making MEP with MEP-template?
This all (fittings) should be preloaded to the MEP project template...

And families itself should be stored in

C:\ProgramData\Autodesk\RVT 2015\Libraries

with following like

\Us Imperial\Duct\Duct Fittings (sorry, I don't have English revit right now, so can't write exact words).

http://www.revitforum.org/mep-general/26664-default-location-duct-fitting-families.html

Re: Ducting Size Change

Anonymous — Fri, 13 Nov 2015 10:41:29 GMT

Thank you for the reply. I'll check. From what you say it sounds like the content libraries may not be fully installed.

Re: Ducting Size Change

jdiala — Fri, 13 Nov 2015 15:09:05 GMT

Those duct family fittings are loaded by default unless you created a new template and purge everything unused.

I believe you are trying to insert the duct transition family while modeling your ductwork. If that is the the case then

you can't do it that way.

As tuuletin has posted, the transitions are located on...

for metrics = C:\ProgramData\Autodesk\RVT 2015\Libraries\US Imperial\Duct\Fittings\Rectangular\Transitions
for english = C:\ProgramData\Autodesk\RVT 2015\Libraries\US Metric\Duct\Fittings\Rectangular\Transitions

Re: Ducting Size Change

Anonymous — Tue, 17 Nov 2015 09:29:17 GMT

Hi, thank you for your advice and for the video. That's exactly what I would like to do but I need to do it with round ducting instead of rectangular ducting. Everything needed to do it is installed and accessible for rectangular ducting but for round ducting there are no suitable fittings installed. I have tried installing content using the installer again but it is just the same, I'm at a bit of a loss now as to what to do.

Re: Ducting Size Change

Anonymous — Tue, 17 Nov 2015 09:33:26 GMT

Hi. I've tried reinstalling content with the installer but it's just the same as before, only limited parts available for round ducting. Everything's there for rectangulat but for round ducting there is only bends tees and blanks installed. I'm a bit stumped now as to how to proceed.

I'm using REVIT 2016, used a structural template to start the project. Tried to load families for round ducting but there are only bends, tees and blanks available to load. I'm a bit stumped as to where to go with it now

Re: Ducting Size Change

tuuletin — Tue, 17 Nov 2015 11:05:31 GMT

Hi, Steve,

this is extremely weird.

I have attached my standard MEP template (name "Mechanical-DefaultRUSRUS.rte"). It's in all Russian, but you see, all needed families are preloaded into revit's standard template (I have also modelled a circular duct with a confuser) http://rghost.ru/8Tc5WMwKD

Do you take templates from C:\ProgramData\Autodesk\RVT 2015\Templates\Russia (← "Russia" for my localization)?

And sorry, I guess, I have disinformed you before. All duct fittings are stored in (further I make translation from Russian, so, it may be named differently — I don't have English revit right now):

C:\ProgramData\Autodesk\RVT 2015\Libraries\Russia      \Воздуховод\Фитинги \Круглый \Переходники
C:\ProgramData\Autodesk\RVT 2015\Libraries\*US/Metric?*\Duct      \Fittings\Circular\Confusers

Re: Ducting Size Change

Anonymous — Tue, 17 Nov 2015 11:45:27 GMT

I think I've found the problem. I think that it is my workflow which has caused it. I started a project with a structural template because the first thing on the drawing was the layout of the steel columns in the building. I have now opened a dummy mechanical project and copied the duct settings across to my template and the round reducer has appered in the duct fittings. I didn't realise that different templates had different stuff in them. Should I have gone about the project in a different way? I'm modelling in 2d and 3d the plant where I work with steel building columns, equipment imported from inventor CAD files and a lot of ducting, cable tray etc.

Re: Ducting Size Change

tuuletin — Tue, 17 Nov 2015 11:57:03 GMT

Choose the correct template in future

The only difference between templates is preloaded families. So, take random template (you can even create empty file) and load into it anything you want (for ducts/columns/electrics).

If you feel comfortable with Structure template — go on, just load all needed families for ducts/equipment. Maybe, you also need to create some views with "Mechanical" (or "Electrical") discipline for more convenient work-flow with ventilation/electricity.

Basement of revit → model under creation = system families + preloaded template families + users loaded families + different stuff (text/dimension/arrow types, materials and so on). No difference, what template you choose to start from (but you save some time, choosing the needed one).

Re: Ducting Size Change

Anonymous — Tue, 17 Nov 2015 13:54:12 GMT

Thanks to everyone for your help and patience.