Abacus fields not found for Fittings Parameters

[mzmaso90]

Hello guys, When I try to create a formula inside the abacus to glean the Area Surfaces of elbow circular or rectangular fittings (which are not  standards parameters in the family of elbow  default) I don't find the way, in the abacus, to upload the fields of dimensions of instance for these fittings, so the Area wouldn't be calculated, even I know which formula I need to glean area from dimensions. In the screenshot You can see that the selectable field for Duct fittings do not comprehend dimensions like lenght,height, radius... How should I go further?

Thank you so much for your time

[iainsavage]

The field needs to come from a Shared Parameter in the family (not a family parameter), or a Project Parameter in the project assigned to the family category.

[mzmaso90]

Not Yet, I made a try but I went back on my own to finish the Revit Duct. As I can see none of ducts seems come from Parts but system classification differences are not easy to change..

I hope you can dowload the We transfer file. Not all the warning advisors, I fixed. Another help I need from you to solve: To calculate surfaces Fittings: I'm trying to use shared parametres, and use Formulas either looking through old Revit forum queries, either from web sites on geometry calculations formula , but, to calculate Flexible Ducts surfaces and fittings with transictions from rectangular to circular do you know a way? From the change of system while i'm charging on shared link the heavy file I attach the .rfa of the rooftop I would like to connect to the unsolved question of changing classification system. I now https://we.tl/t-6Oi0SjdGDU

[mzmaso90]

Sorry @iainsavage I have try to respond to you in the other post, But I have some problem with the connection. Hope you will understand..

[iainsavage]

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@mzmaso90  schrieb:

To calculate surfaces Fittings: I'm trying to use shared parametres, and use Formulas either looking through old Revit forum queries, either from web sites on geometry calculations formula , but, to calculate Flexible Ducts surfaces and fittings with transictions from rectangular to circular do you know a way? 

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Maybe this link and the links that it contains will help:

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/How-to-get-area-of...

The key is to create formulas which get you the correct answer for all possible shape permutations.

This is another link in which @ToanDN suggested a method based on painting the fitting with a custom material - this would maybe be a better method for complex fittings like transitions etc.

https://forums.autodesk.com/t5/revit-mep-forum/duct-tee-area-in-schedule/m-p/11834351

[mzmaso90]

Hello @iainsavage : I had a look into your tips: but as dynamo procedure forward a pdf which is not perfectly clear on how to transfer the geometric equations in Revit field parameters, and Toan suggestion appears good but when I do the painting, the act doesn't affect at the same time the whole fitting or neither it selects the fitting duct, I found the Fabrication Part schedul  much more useful, although I haven't found  yet where modify the material that provides the total weigh and the thickness of metal part. ( which seems a locked  parameter) . What do you think ? 

[iainsavage]

Using fabrication parts very much depends on what your ultimate goals are for the model because as I warned you before fabrication ducts/parts do not form connected systems and do not allow flow or pressure calculations.

They do however contain additional manufacturing details.

If you do want to retain both the Revit systems design and also include fabrication parts then I would suggest using two models, one for design, the other for fabrication or it might be possible to get both functions out of one model by using phases (design phase and fabrication/installation phase) but I've not tried that myself.

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@mzmaso90  schrieb:

 I haven't found  yet where modify the material that provides the total weigh and the thickness of metal part. 

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I'm pretty sure that this information is contained in the fabrication service database itself based on the design pressure of the ductwork and the manufacturing code (probably SMACNA).

If you want to customise fabrication ducts/parts then (as far as I know) you can't do that in Revit, you need to use Fabrication CADmep which is probably part of your subscription package.

Having said that, I don't use fabrication parts on projects and have only played with them out of curiosity.