After lasts weeks review of The Importance of being openBIM, this week I have managed to fully populate my mechanical model with all of the assets I want to capture within it to satisfy my Plain Language Question 2.4 (only Architectural and Electrical to go!). The work in progress model can be accessed as both a Native Revit file, an IFC file, and have I even tried to do a COBie export to see where the gaps lie…
While I haven’t given it too much thought, when creating new objects I have tried to ensure that I fill them with the information I need to answer my Plain Language Questions about attribute data; for the most part this has been successful.
Note: So far all I have done is map over the COBie properties and my additional property sets, I haven’t tried to make all my sheets work; that happens during PLQ 2.5.
However, nothing in life comes easy, and COBie is no different. Shown below is a screenshot showing that my components have at least successfully transferred over some of their data with them.
At this point I have noticed a number of elements work well, and a number of elements work not so well. Note: It is worth pointing out that there is likely to be (an element of) user error as I have not fully investigated how to export this information correctly; yet.
Because I have used the shared parameters and property set mapping files I introduced in the last blog post many of my properties are exporting correctly, such as: Bar Code, Serial Number, Material, Shape & Size. I have also managed fixed my dimension error from last week thanks to Autodesk customer support (I had to change the data type from ‘Real’ to ‘Length’). So the attribute mapping process appears to be going well.
I’m afraid that it isn’t all sunshine & rainbows however as some elements are not working exactly as I hoped. Currently: ‘Category’ properties don’t seem to carry despite appearing within the IFC object’s properties, and something similar is also happening with ‘Description’. As you can see below, my IFC file captures this information but when I use xBIM to create COBie the information just doesn’t seem to carry.
It gets worse. As the IFC export doesn’t capture data from linked files I need to create rooms/spaces in each model so that my components can export space information. This means that when I produce my combined COBie file I will need to delete duplicate space instances as I’ll end up with three Living rooms. In addition, no matter what I do I cannot seem to get an object’s ‘Category’ to export and appear within the COBie type sheet (or even other sheets when I tested them too) despite appearing within the IFC. For matters like this I normally turn to xBIM’s Github but sadly I have not found the solution yet.
Finally, within my attribute tab, I am getting duplicate attributes. It appears that despite being recorded as an instance or type property, when exporting some properties are coming out as both; making the sheet more difficult to read and much longer too.
Over the next few weeks as I complete the graphical element of my information model, I will also be looking into resolving these issues to attempt to create a bespoke IFC FM Handover that’ll include as much information to complete my COBie export as possible, and satisfy my data requirements.
But first, let’s focus on the matter at hand. What assets are in my home? Well here is a schedule of all the Mechanical assets I am including that fall under the responsibilities outlined within my Design Responsibility Matrix.
And there you have it, now that I have a schedule of my mechanical assets, I am well on my way to answering this Plain Language Question. This means that subject to ensuring I follow suit my Architectural and Electrical information models; completing PLQ2.4 shouldn’t be far away!
2.1 What existing information is available?
2.2 Is there sufficient information to produce a BEP?
2.3 What is the layout of the house?
2.4 What assets are contained within?
2.5 What asset information can be linked to the graphical model?
Now that Mechanical is sufficiently developed, it’s time to look at some more electrical objects…