topic Re: Importing STP file and make it parametric in Revit (STP to RFA) in Revit Structure Forum

Importing STP file and make it parametric in Revit (STP to RFA)

hossein.parsinejad — Sat, 04 Dec 2021 01:34:51 GMT

Hi BIMologists,

We are working on importing STP file into my Revit model and making them parametric into Revit environment. Have any of you gone through the same process before? How can I make them parametric? I am also using Inventor for editing the components and bringing them as RFA (family) components.

Your thoughts and tricks would help me,

Re: Importing STP file and make it parametric in Revit (STP to RFA)

RDAOU — Mon, 06 Dec 2021 12:55:51 GMT

@hossein.parsinejad

Define what exactly you want to make parametric...Attach .rfa file

Re: Importing STP file and make it parametric in Revit (STP to RFA)

hossein.parsinejad — Mon, 06 Dec 2021 18:11:22 GMT

Please find attached RFA file. The parameters would be dimensions (e.g. A and B* attached) and the other native capabilities of our RFA native families. I'd like to go through same established workflow during my design process:

Received STP > RFA (into my Revit model) > Do the spreadsheets (e.g. quantities related to volume of concrete, etc)

Re: Importing STP file and make it parametric in Revit (STP to RFA)

RPTHOMAS108 — Mon, 06 Dec 2021 18:45:33 GMT

When you explode it then the grips will be exposed to attach dimension or lock to refplanes. You are lucky in this case because it explodes, not all do depending on surfaces used in AutoCAD.

Overall this would be a complicated approach as to stretch the model either side of the red line would entail setting fixed relationships to all grips to one side of it.

Would seem easier just to create it in Revit and end up with something that doesn't bulk up the project and at the same behaves the way it was intended to (was thought about how to stretch it from point of conception).

Each grip movement below is limited between other grips to maintain the same overall arrangement. Otherwise you get a modelling error and have to reset it.

Re: Importing STP file and make it parametric in Revit (STP to RFA)

RDAOU — Mon, 06 Dec 2021 18:50:02 GMT

@hossein.parsinejad

To make the geometry parametrically adjustable is a bit far fetched...however, what you can do is "Add reporting parameters" as follows (GIF also below for the same steps described hereunder)

Open the rfa
Explode the imported Element
Place Dimensions (Length and Width and Thickness...etc)
Associate these parameters with Instance/Reporting Shared Parameters
- This will allow you to schedule the dimensions as is (as imported from step)
Select the exploded geometry and associate its material to a type or Instance parameter (and set to Concrete or whatever)
- This will allow you to quantify volume of the concrete

Load into the model and create a material take-off schedule

Add the shared parameters for dimensions
Add Material: Name and Material: Volume

Re: Importing STP file and make it parametric in Revit (STP to RFA)

hossein.parsinejad — Mon, 06 Dec 2021 19:12:50 GMT

Thanks for your reply; however, this approach is going to make further issues in modeling as I tried. After explosion, there are additional works that can be applied in order to make it parametric.

Re: Importing STP file and make it parametric in Revit (STP to RFA)

hossein.parsinejad — Mon, 06 Dec 2021 19:34:52 GMT

Thank you @RDAOU. It was what I was looking for and the steps are clear. After exploding the family, when I want to 'make new group' in 'shared parameters'. Where is the shared parameters' default text file located? I created a text file and starting from there.

Re: Importing STP file and make it parametric in Revit (STP to RFA)

RDAOU — Mon, 06 Dec 2021 19:40:42 GMT

@hossein.parsinejad

There are several OOTB in Revit which are related to plugins; however, if you do not have a personalized file, simply create a new one >>> save it to a location of your choice and start from there...