Splitting objects in an IFC model

You can split objects in an IFC model into a number of smaller objects. This enables you to associate the smaller objects with tasks in a project individually. Object splitting may be useful in the following circumstances:

  • Where an object represents more than one individual item. For example, you may want to split an object that represents multiple columns, windows or beams into individual objects so that you can schedule them individually rather than as a single entity.
  • Where an object represents a single object that needs to be split into multiple objects for the purposes of scheduling. For example, you may want to split an object that represents a single concrete slab into two individual objects if half of the slab needs to be laid on one day and the other half needs to be laid the next.

Once you have split an object, it is possible to then split the resulting objects. You can carry on splitting in this way until you have split objects into whatever level of detail you require for scheduling.

There are three methods of splitting objects:

  • Manually, by clicking and dragging to define the lines along which to cut. This is a good way to split objects if you want to split a single object in a complex way, or if you want to specify the line(s) of the cut visually. You cannot split multiple objects manually at the same time.
  • Splitting objects where they intersect with one or more other objects. This is a good way to split objects if you want to split one or more objects that overlap incorrectly with other objects, or if you want to split objects based on their physical location. For example, you may want to split a series of columns at each floor of a building; or you may want to split the vertical bars in a multi-paned window where they meet the horizontal bars.
  • Splitting objects along a particular axis. This is a good way to split objects if you want to split one or more objects evenly according to a specified number of cuts, or with cuts positioned at specific percentages along an axis. You can split multiple objects in this way at the same time.

You cannot split site objects.

If you want to undo a split or a merge, it is best not to use Powerproject's standard Undo Ribbon command, but to use the Remove Split right-click command to recombine split objects, or the Remove Product Merge right-click command to reseparate merged objects. The reason for this is that if carrying out a split or a merge resulted in the need for one or more IFC product selections to be updated, you would need to click Undo twice: once to undo the IFC product selection updates and a second time to undo the split or merge itself. Using the Remove Split and Remove Product Merge right-click commands instead of Undo enables you to specify the way in which any IFC product selections are updated.

If you are working with an IFC file that is stored in the Elecosoft BIMCloud®, you must synchronise your split and merge data with the Elecosoft BIMCloud once you have finished a work session in which you have split or merged objects.

Related Topics:

Specifying the build order of split objects

Recombining previously-split objects in an IFC model

Merging objects in an IFC model

Reseparating previously-merged objects in an IFC model

Copying split and merge data to a different revision of an IFC file

Synchronising split and merge data with the Elecosoft BIMCloud

Selecting objects in an IFC model