set down connectors and insulation

[TimKing3539]

I am trying to setup a set down connector for a rolled TDF flange using Fabrication 2019.1.2 by following the Knowledge steps (which by the way have different screen shots even though they are supposedly the same version).

If I use the Revit MEP metric content, it tries to add a reducer between the bare flange and the stepped flange. If I follow the same process using the US metric template, the sheetmetal appears to be stepped but the linework doesn't show it (I suspect that the insulation liner is protruding thru the step).

Add to this is the ongoing problem with insulation. Fabrication sets an insulation spec'n such as foam or wrap, I added one called Glasswool and can then pick either inside or outside with a full size range. When going to Revit, the duct piece only has the insulation spec'n (liners and wraps) it seems to be a mix up between product and type. The only band-aid is to add all the sizes to foam liners and wraps, however this will  screw up the BOG's etc etc.

Could someone please help with both issues.

[craigjonnson]

Hi Tim,

This is not a straight forward answer to your question. 

You need to setup thickness in the database for your insulation. From there you create an insulation specification.

https://knowledge.autodesk.com/support/fabrication-products/learn-explore/caas/CloudHelp/cloudhelp/2...

https://knowledge.autodesk.com/support/fabrication-products/learn-explore/caas/CloudHelp/cloudhelp/2...

It sounds like you are also using the multi-route tool within revit? You can omit the fittings.

https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2018/EN...

The fabrication database is a rabbit warren of settings. I suggest you learn cadmep before working with fabrication parts. 

[TimKing3539]

Thanks for your response Craig. I went back thru and corrected the insulation side and now the duct behaves as it should except for when I want a setdown connector.

I've attached two snips showing the connector and what it looks like.

I found the insulation double wall unticked but no response when ticking and adding a neg extension.

Ideas ?

[Mike_Arcari]

Hi Tim

My step downs work in both fabrication and Revit although I found it to be very frustrating to get them to work

I think you need to setup how the connector is drawn in fabrication

Attached is screenshots of my setup and how it looks when drawn

Also I don't use liner thickness setting but rather have a fixed step down size which may not be useful for you

That's about as much help as I can offer you im afraid as I don't know Revit very well but hope this helps

[craigjonnson]

Tim,

Mike is correct. You will need to setup the breakpoint in order to get the metal to fold (Display) correctly.

Using Tim's screenshot, dont setup 2 lines as he has. Use one line and set the first 2 columns to 99999.
Set your gasket to 4mm or Imperial Equivalent. Then copy the rest. 35mm is the flange size. The remaining '50s are the position of the connector and extension. 
More information here. https://knowledge.autodesk.com/support/fabrication-products/learn-explore/caas/CloudHelp/cloudhelp/2...

A great forum that no-doubt has all of your questions already answered is www.xtracad.com

Double-wall option is used for perforated lining. As this is an additional sheet metal that can be quantified/fabricated. Again, typing Doublewall CADMEP into google will bring up all the information you need.