Merge or Edit IFC files with Revit

Hi there.

It’s been a while. Apologies.

I figured a valuable workflow today, maybe some of you already figured before me, but as I think it is really interesting if not good, I want to briefly share it here.

It is about IFC files, we need to edit or merge more than often. We have in house at Legendre tools to achieve this, like SimpleBIM. But there is a way to achieve IFC editing (to some extend), with our favorite tool, aka Revit.

Here’s what I suggest you to try out:

  • Open a new project
  • Link there the IFC files you want to merge. It will create new files, with the *.ifc.rvt extension
  • Open these files in Revit and add or remove stuff. you can also update some parameters values
  • Open another empty file
  • Link the *ifc.rvt files there, as you would with regular Revit files
  • Bind the links. It creates groups. Ungroup after and export the result as an IFC (tested in 2019 with Autodesk Open Source exporter, available here)
  • Voilà

Have a nice day 🙂



IFC Revit


Hi folks,

Summer time…..time for some PC cleaning. And guess what? blast from the past… I’m lucky to find this short movie, crappy quality video ripped from VHS shooting. It’s been 16 years since. Not a lifetime, but….a while still.

I thought I should share somewhere, and I guess this is what a blog is made for. It is also a good time in my life to remember where I come from, and also maybe why I go to work each day. I believe this is my past that explains the passion I have for construction and why I struggle each days to make it easier and smarter for the workers.

Thinking further, I believe this is what founded my interest in BIM technologies and processes. Why should we have it hard and difficult when using some brain and silicium could make your day good, efficient, and not exhausting? Why can’t we think it should be done right from the start, and not let laziness and lack of commitment guide the way we design and build our homes?

Viarme 2001

I’ve been there. On construction sites. Leading people, workers teams. Sharing with them under the hot sunny days or the windy wet ones. And at time I wanted it to end. Because I was lucky enough to have school education that helped me to update my career.

So I did. And at some point I ended up dealing with construction engineering and methods. Doing this, by chance probably, I had to learn a new software, to make 3D drawings (sic): Revit. In the meantime,I have been exploring new ways to document tasks for workers, so they have less pain from their days on site. Because most of them are spending a lifetime doing this tasks. Breaking bodies, backs, and hands.

I believe my job is helping them to some extend. Better coordination, better preparation, checking in the virtual world before it turns into heavy concrete blocks, unbreakable walls and floors.

It is not perfect. And will never be probably. But I really feel that my roots from the construction site are guiding me every day, as a remembrance of what I’ve been thru at this time.

Enjoy this crappy video. Probably useless as it is.But… is a great memory for me.


PS:(remember it was 16 years ago ;))

Some news from France

Hi people. It’s been a while….

A lot of things running nowadays, with a new role as part time consultant/trainer, mainly for Dynamo, the launch of Paris Revit User Group, and of course some time for my work at Groupe Legendre, not forgetting about family (even though they might disagree…..).

Anyway, I should post more often, but….let’s put this in the Shoulds book :).

As a following to the interview I had with Emmanuel Di Giacomo, find below the links to the official interview with Autodesk Communication team, and the pdf document.

I will update the post when I find the english version) (yes, I did one…..French accent included :)).



Autodesk – Julien Benoit interview

Autodesk – Customer feedback

Autodesk case study – Groupe Legendre pdf


ABCD blog interview

I’m glad to share here the interview I had on a French Autodesk blog with Emmanuel Di Giacomo:

Here’s a GT version (disclaimer: some edition when it was really crappy but not so much…..just remember it is Google Translate 😉 )

Interview BIM Managers – Episode #5 Julien Benoit, BIM Manager – Legendre Construction

Our saga interviews BIM Managers resumed in early this year 2016. And with prestige it starts with the interview of one of the great names of BIM that radiates the France international, Julien Benoit, BIM Manager for the Legendre Group Construction and regular at international seminars since known for its highly specialized skills in the field.

ID JBE 092015

Julien Benoit

BIM Manager РResponsable du p̫le Pr̩construction

Groupe Legendre Construction


Hello Julien,
It is a pleasure and an honor to receive you this week on Blog ABCD as part of this series of interviews BIM Managers who gets in this new year.

Could you first tell us briefly about your academic and professional briefly and tell us how you arrived at Legendre Construction?

I got a Civil Engineering degree in 1996. Then I started my career in the Bouygues group for a period of several years work as foreman.

This was followed by an experience in SMEs in site management at Vinci, before returning at Bouygues for engineering methods. I “met” Revit on this occasion. After a few years I changed jobs and developed the use of Revit. On the occasion of Rennes Metro project, and to restart my career, I joined in 2014 group Legendre.

bandeau construction

You’re a figure of BIM in France, especially after going Bouygues and after hosting your blog. Could you tell us when you first heard of BIM and how you got proper process?

I started discovering a software, Revit. But in the projects in which I participated, I gradually discovered the advantages there would be for stakeholders to work more collaboratively, with a unifying technology such as digital model. I participated in events like the RTC conferences and exchanges with other countries, other actors, made me understand the importance of BIM for our industry. I firmly believe the AEC industry should become a leading industry. I decided that BIM would be my main business for the rest of my career.

MG Rennes

Siège de Legendre – Maquette BIM

You are the cornerstone of BIM in construction Legendre. Have you built the Company to deploy this process at home? If so, what strategy have you put in place?

I actually joined the Legendre group for the referrer and the promoter of the implementation of BIM in the various entities. These are our projects that push us forward, but not in a wait strategy, where a customer request will force us to act, but having the desire to have constantly a step ahead. We must be proactive on this issue for our customers.

Our projects of Design&Build and Real Estate development are conducted in digital model, with a full BIM process.

LEG Saussure - L-BA architectes

Saussure – L-BA Architectes

How many people do you have under your direction and how do you move to BIM? Is long and difficult as is usually said?

My team consists currently of 7 people. We cover the BIM management, construction engineering and technical coordination.

The transition to BIM is done gradually, by setting up new processes to measurement of conducted experiments.

The solutions adopted for the control of a BIM process is then transmitted by a method of in house training, patient Zero concept.

Long and difficult? It’s a matter of perspective. It is necessary to lead an effort yes, and we must show determination after choices. I am the guarantor of the determination, and my goal is to minimize the effort required for my team.

mon bureau

Bureau de Julien Benoit…en BIM

What do you think the pillars of a successful outcome of BIM in business?

It must be a business project, not a single initiative. And do not believe that the acquisition of a technology means mastering the BIM process.
I think we need to be humble, and that nothing is written.
There is currently no method for the establishment of a BIM process in an entity, especially there are choices to make, then, it should be accompanied by experienced people. Also, a successful implementation is the result of collective work, actors business partners about our projects, clients.

Do you design and build you your projects in BIM or you limit yourself to the design phase?

We use the digital model as often as possible, namely on projects where we are responsible for technical studies and all trades coordination. Most of our construction and real estate development design projects are developed through a collaborative BIM process, integrating the design, coordination, implementation studies, methods and AsBuild model.

Our desire is to bring the model of all our projects at AsBuild, and in some cases we will bring the model to a level sufficient for the maintenance and operation.

LEG synthèse

What are the solutions or BIM vault keys with you?

First, our main production software is Autodesk Revit.

Then all our developments and acquisitions are thought and think about the IFC standard. We are partners now for 2 years with the collaborative platform BIMSync to Catenda. The IFC is the number 1 issue for us. Incompatible solution not excluded. We are also working closely with all other services of the group, because the BIM unites our developments.

Résultats de recherche d'images pour « ifc buildingsmart »

You’re one of the open buildingSMART BIM® Experts in France. How this exchange format is does it fit into your workflow?

The IFC format allows us to receive models from our subcontractors s.a. frames, both wood and metal. This is a very effective solution.

This format is also used as the QTO visualization export.

This is also the way we control models, and make design verification through Solibri Model Checker. We also use the format on the BCF BIMSync platform for the review of our projects and collaboration in the cloud.


BIMSync Catenda

Do you use the open source engine Revit IFC and personalized you best for your needs?

Yes, I use the open source IFC export to Revit. We have not developed our own export from source, but it will not be long. This is in line with the R & D projects we lead.

What is the best memory of BIM project on which you worked and why?

My best memory refers to a design project construction of a waste sorting center. We worked with the process supplier thanks to IFC, and especially we have optimized the building design with the digital model, which brought together a scatter of the existing and the model of the future project.

Above all, the project manager was able to take advantage of this work in BIM while completely beginner.


What benefits BIM he brings essentially your company?

Beyond the increased productivity by the Revit user, we develop and learn new ways of working. BIM process that we carry can be summarized as: collaborative, agile, efficient.

It seems that some BIM Experts living in Britain, there you see a cause and effect?

Ahahahah ! no, any 😉


You’re one of the Founders of PRUG (Paris Revit User Group ed), how do you think this will contribute to the advance of BIM in France?

I consider as part of my job to communicate the fact and explain the new concept of our projects.

It is essential to make the extension, explain, debate, and especially about real, concrete cases. This group (PRUG) is a way to achieve this. It’s technical, practical. Those involved use the software every day. BIM structure building industry, we must explain again and again how and with what tools.


Are you involved in PTN and its working groups? And what do you think of this government initiative the sector scanning?

I am not involved in PTN. I think this is a good initiative, but I consider only actions count. Quite a few strong proposals for the moment, a lot of speeches. The industry players want facts.

Résultats de recherche d'images pour « ptnb bim »

Do you think we should make it mandatory BIM for public projects like our British neighbors, German, Spanish and Nordic?

Yes, that would be a strong signal. Today, a urban legend claims that BIM will be mandatory in France in 2017. This is false. Nothing, no text specifies. And make a mandatory thing in France takes time. The sector is not ready. So again, a lot of talk, little action. Wait and see …

You are recognized as a Great Experts Dynamo in Europe. Can you quickly tell us about the technology, its benefits, and also tell us what services you propose around this?

Dynamo is an Open Source visual programming software for interacting with multiple Autodesk software, mainly Revit; but also with other software such as MS Excel, Rhino, etc …

Dynamo automates common tasks, making operations impossible in the basic software and connects software and databases. We now use it in our daily production.

I propose to architects and daily users of Revit train to this solution, because I believe that any entity having as main production software Revit, will find immediate use, both in productivity and quality of production.

What are my next goals around BIM in Legendre? Are you interested in particular in the Virtual Reality?

My development goals on the 2 years to come concerning the digital model in maintenance operation phase, and reverse engineering from point clouds.

Furthermore, I must continue to develop the use of our collaborative platform.

Virtual Reality is interesting but still has much progress to be used in daily production. It was in my mid-term targets.

Do you have a particular message you’d like to convey to fans of BIM?

BIM is not a technology. It is a working method, which can be defined as the concurrent engineering applied to the building. So we are all actors. We must persevere, learn and above all share.
Again, thank you for your testimony. Bonne continuation Julien.

You can contact Julien Benoit, for expert advice and consulting on Dynamo here:



Documenting Dynamo nodes

I was recently invited by Luke Johnson (What Revit Wants) to be part of a website dedicated to Dynamo nodes.

31-01-2016 14-44-24

It is really nice and clean. You will find there a lot of good input about Dynamo packages, and the nodes that are useful and somehow specific.

31-01-2016 14-46-34Custom nodes documentation is organized by packages you will find in the Package Manager in the Dynamo interface, or on this website:

Some OOTB nodes are also explained, as well as some specific workflows.

Contributors are the packages authors, but of course as he’s the one starting all this, Luke has to be rewarded for this at the first place (and he does most of the job :)!!).

The nodes from SteamNodes package are here too, and I will do my best to explain the nodes functions and workflows they are related to.

Follow @DynamoNodes on Twitter.

Enjoy this, and don’t forget to learn Dynamo.















OSLO – Dynamo event & Education thoughts

I’m a lucky guy.

My awesome friend HÃ¥vard Vasshaug offers me a while ago the opportunity to present a part of my Dynamo stuff at an Autodesk-Dynamo event in Oslo last week. And it was more than just a presentation. It’s was a true connection.

norway oslo

I don’t know if it’s a common thing in Norway among the population, but there was a very high density of smart, amazing, beautiful people in the audience. Feedback from attendees was so great, questions were straight, meaningful, brilliant. I’m pretty sure other presenters this day, Matt Jezik, Dieter Vermeulen, HÃ¥vard Vasshaug, Andreas Dieckmann, are feeling the same.

After my presentation, we had a chat about how I’ve learned Dynamo, Revit API, and how I teach Dynamo to my team and colleagues on a daily basis. I have to admit I never thought about this before.

My way is collaborative education. Educate one, and teach him how to educate others.

Training people requires time and effort. It’s exhausting. But, to me, Sharing knowledge is mandatory. My approach is to spend time and effort with a first team member, patient zero, and bring him as much as I can in a certain amount of time (what can be invest at that moment). Then I support him every day, answering question without any delay. by mail, text, video, no matter. once it has started, it should never stop. Although, it has to be for real, not for training. Learning stuff on projects is a bit hard (deadline, etc…-false, it is very hard) but it forces one to achieve something. No other way. And the lessons learned are worth a gazillion of training hours, not mentioning the fulfillment of the guy doing serious stuff on project. Self-esteem.

The critic moment: deadline is here, boy is scratching his head. You, as a leader or educator, must be present and free to help at this very moment. Support by providing ideas, new path, workaround. Even DO things, with explanation and pedagogy,  so that the wheel keeps spinning. You, as a new-born-team, will succeed.

Now this dude is ready to educate another. Proud, relax, knowing he has minimum skill to follow his path, with you watching his back. He’s not really aware of this, but I give him no choice. Patient zero must teach others. And so it goes on with the next team member.

I keep training patient zero, reaching new level, by supporting his effort. Be there, communicate, listen, investigate after issues (when a long silent pause occurs….). Of course I do help next guys, but patient zero is so happy to share his knowledge. He will act like this forever. Job done.

With other team members, I now only act as “an expert” that answers questions when they agreed it was out of range for their actual skill. The more the team grows, the less questions I have.

After a huge effort from my side at the beginning, I now have free time beside answering questions to make some progress myself in what is my job and passion. I don’t think I’m doing anything special, no revolution, no “”AMAZING”” comment. But this was the talk we had. And it was really cool.

Tell me what you think.

BTW, find here my presentation.

OSLO ADSK event 082015 J Benoit LEG_Final