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IFC Parsing Setup (IFC PS)
IFC Standard
The IFC standard is quite open and versatile. Each BIM application exports IFCs in its own way. Usually, it's not straightforward to detect things in IFC files. This is why we need IFC PSs.
The IFC PS is the information we need to understand your IFCs. A company can have several IFC PSs. You will need to select one of your IFC PSs for each project.
There are two types of entries in a IFC PS:
- Part categories: Those are entries we need to classify parts into categories (wood profiles, plates, nail lines, ...)
- Part properties: Those are entries that help us find property values in parts (a zone, a milling depth, ...)
IFC props and values
Usually, our system tries to detect part names and values with a case insensitive criteria. So, for us, it's the same "Reference", "REFERENCE" and "reference".
Part categories
For each category you have to add one or more entries that need to match somehow the information of your parts. Each entry has:
- IFC Prop: The IFC property to look into.
- Type of match: Whether we need to find values that match exactly or only the prefix.
- Value: The value to look for in the property.
Example
If you add following entries to the "Top Rail" category:
| IFC Prop | Match | Value |
|---|---|---|
| REFERENCE | ALL | TOPRAIL |
| REFERENCE | PREFIX | TR |
The system will consider as Top Rails parts with "REFERENCE" values such as: TOPRAIL, TR12, TR, TR45.
But will never detect: TOPRAIL2, TOP_RAIL, 12TR.
Top Rail Wood
The top rail of a panel.
Bottom Rail Wood
The bottom rail of a panel.
Extra Top Wood
Woods over the top rail, usually built after nailing the studs.
Extra Bottom Wood
Woods below the bottom rail, usually built after nailing the studs.
Wood profile
Other wood profile parts.
Plate
Plates in a panel.
Frame Nail Lines
Nails in plates. Group of frame nails represented as a line. The line goes through the heads of the nails.
Frame Nail Singles
Nails in frame. Single nail represented as line. The line goes through the body of the nail.
Plate Nail Lines
Nails in plates. Group of frame nails represented as a line. The line goes through the heads of the nails.
Milling
Milling lines.
Plate Screw
Lines representing screws in the same way as the "Frame Nail Lines".
Sawing
Sawing lines.
Hidden Material
Hidden materials, that can be hidden in the 3D viewer if configured this way in the interface settings.
Glue lines
Glue lines for bricks.
Bricks / Stones
Single bricks/stones.
Part properties
This is simpler than categories. Foe each prop we need one or more entries that tell us what is the property name to look for.
Each entry needs only an IFC Prop.
Example
If you add following entries to the "Zone" property:
| IFC Prop |
|---|
| WorkPlane |
| Layer |
The system will find the following zones for each part:
| Part | "WorkPlane" | "Layer" | Detected Zone |
|---|---|---|---|
| P1 | 1 | 2 | 1 |
| P2 | UNDEFINED | 3 | 3 |
| P3 | 1 | UNDEFINED | 1 |
It picks the first that matches.
Zone (layer)
The part panel zone/layer.
Reference (we expect same reference for same shape)
This is an ID that's expected to be the same across parts with the same shape. It's usually generated as "reference" in Tekla Structures but can exist in other applications IFCs
Nail/Screw CTC
The Center-to-center distance in nail and screw lines.
Mill/Saw depth
The milling/saw depth in a milling and sawing line.
Brick Type
The type of the brick.
Comment
Comment of the part.
Finish
Finish of the part.
Bricks: Machine Brick Flag
Brick that is not manual but machine built.
Milling: V-Mill Flag
Milling line that needs to be done as V-Mill.