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Extracting setout data from IFC model
Posted by surveyjay on August 31, 2021 at 12:35 amGday All
First Post here!
It seems that in construction the way things are going we are only getting supplied IFC models, and not DWG’s to enable us to extract and setout from.
Has anyone dealt with this shift in data sharing?
If so what programs or work flows do you use to get useable setotut data….such as column centres from?
Thanks in advance.
lurker replied 2 years, 7 months ago 6 Members · 5 Replies- 5 Replies
Welcome, friend. Allow me to bump this to the top for an expert to hopefully see and reply.
Have you actually asked for the dwg and been refused?
Tell your client you need the dwg. Make it part of your assumptions/requirements in your contract.
Otherwise, enter the information from the drawings into CAD yourself. And check it. And check it again
I’ve never had to use them personally, but I know of folks using Trimble Access to stake directly from IFC models. I’m sure other software packages can do the same.
Civil3D can import/convert IFC files, but I do believe you have to have Revit to view/manipulate the converted DWGs…
It’s probably easier to request the drawing files for now, but I am seeing more and more IFC/BIM files on larger projects, so I’m guessing I’ll have to jump on board and figure out a workflow…
“…people will come to love their oppression, to adore the technologies that undo their capacities to think.” -Neil Postman- Posted by: @surveyjay
Has anyone dealt with this shift in data sharing?
If so what programs or work flows do you use to get useable setotut data….such as column centres from?
It’s my belief that the conveyance of (essentially vertical) data via Industry Foundation Classes (IFC) will become more prevalent in the years to come. In fact, back in 2019 the Open Design Alliance (ODA, the people behind allowing CAD applications such the IntelliCAD Technology Consortium [ITC] to open/write common CAD platforms such as DWG, DGN, RVT, etc) formed a strategic partnership with BuildingSmart to further develop DWG/IFC interoperability for their respective members. More work in this area is on-going.
Earlier this year, one of my colleagues produced this introductory video on how to extract RVT and/or IFC data for stakeout using the Carlson CADNet module.
I hope this information helps.
It has always been my understanding you had to rely on the plans and the cad was only for convenience. If your staking differed from the IFC plans but matched the cad you would still be liable. Now you talk about staking from a 3d model directly. That would be great if we could and not be liable for any mistakes in the model.
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