In this blog we are going to skip the main section on Attributes (see the next blog) and focus on one specific Attribute the Predefined Type as this is closely related to Entities.
In the last blog I had a bit of moan and we learnt about some basic IFC principles. In this blog we’re going to take what we have learnt and apply it to the world of Revit. Therefore, if you haven’t read it please do so.
I wanted to start by giving a friendly warning – this isn’t for the faint hearted. In fact, I’ve heard it described as black magic, performed by wizards with the patience of saints. Continue reading
After a year at Bond Bryan Digital and to coincide with our new website, it’s time I rolled up my sleeves and finally started blogging. For those who don’t know me my name is Emma and I’m an Autodesk Revit user. I’m a technician by trade and the more I used Revit over the years the more I craved structure to my information to get the best out of the software and my models. This is why I started to look at standards and ways of implementing them within Revit. In particular openBIM standards like Industry Foundation Classes (IFC) because I want my information to be as useful as possible to everyone who needs it, now and in the future. Continue reading
Models are often exchanged between different stakeholders working on projects. Model authors and those using the models use a variety of software for their own needs. In order for BIM to work it is imperative that geometry and information are exchanged reliably between each software tool. Continue reading
There are a number of things to understand when exporting an IFC model. What is often misunderstood is that an IFC file is not simply one file. IFC files are exported for different purposes so when issuing an IFC file it is important to understand the purpose of the exchange. Once you understand the needs of the recipient you can begin to filter your model for different uses. Continue reading
One of the challenges faced as we move into this brave new world of information is what information we want users to complete within their models. When you first start looking at data it can be fairly daunting trying to work out what is and isn’t required. Of course we could leave this to individual users but then this creates inconsistencies between individuals, offices and projects. Without creating a standard approach it also makes it harder to set up standardised schedules and provide consistent training. Continue reading
There are really two types of classification when it comes to working with open standards. The first is how you classify the element/component or a space against the standard IFC (ISO 16739:2013) schema. For example, classifying a model element/component as a Wall.
I have covered the detailed application of Element Classification in a series of detailed posts previously. See our series on Element Classification, of which there are 3 posts, for more information on this subject. However this post deals with a second type of classification which is referred to in IFC terminology as an IfcClassificationReference. Continue reading
Many users of BIM authoring tools are still focussed on producing the same deliverables they have always produced but in a more efficient way. This means that even if they have adopted an approach to producing data much of it will be focussed on native data fields within their chosen authoring tools. This is fine if the only output is a drawing or a schedule but if others want to use your data for other purposes in a consistent manner on every project, irrelevant of who the model author is, then we believe data needs to be built around a common open standard. Continue reading
I’m often asked how to classify certain elements in Graphisoft ARCHICAD for IFC exchange. To many IFC is a weird language that has little to do with everyday language. Many of our classifications are preset up in our ARCHICAD templates but there are always instances where a user needs to manually classify an element. So we thought it would be useful to develop a list to assist model authors understand how to classify model elements against the IFC schema. In fact i’ve been meaning to do this for a long time. Of course in the spirit of OPEN BIM we also decided to share this list. Continue reading