Merging objects in an IFC model

You can merge objects in an IFC model into a single object. This enables you to associate the larger, merged object with a task in a project rather than having to associate each of the individual objects with tasks individually. Object merging may be useful if a number of objects represent items that can be dealt with as a single item. For example, you may want to merge a number of objects that represent multiple columns, windows or beams into a single object so that you can schedule them as a single entity rather than individually.

Objects in an IFC model do not have to be physically connected to one another in order for you to be able to merge them. For example, you could merge a number of columns in an IFC model even if they were geographically distinct from one another.

You cannot merge multiple site objects into a single object.

To merge together objects in an IFC model:

  1. Select the objects that you want to merge.
  2. Right-click one of the selected objects in the IFC Model pane and select Merge Products from the menu that appears. The objects are merged into a single object and all properties of first selected original object except the internal identifier are copied to the resulting merged object.

    If the original objects were included in one or more IFC product searches, the resulting merged object is included in the IFC product searches automatically. However, if the original objects were included in one or more IFC product selections, the resulting merged object is not included in the IFC product selections automatically, and the Update IFC Product Selections dialog appears, listing the IFC product selections in which the original objects were included.
  3. To update an IFC product selection so that it includes the resulting merged object rather than one of the original objects, select the check box to the left of the IFC product selection and click Update. Updating IFC product selections in this way means that any tasks that were associated with one of the original objects via an IFC product selection will be associated with the resulting merged object. If you choose not to update any IFC product selections, you will need to associate the merged object with tasks manually.

    If a project contains multiple IFC product selections, with each one containing one of the original objects, updating IFC product selections in this way results in a number of individual IFC product selections that all contain the resulting merged object. If this is the case, you can delete any unwanted duplicate IFC product selections.

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.

Merging objects in IFC group models

If the IFC Model pane is currently displaying an IFC group model, it is not possible to merge objects from more than one of the individual IFC models in the IFC group model. For this reason, it may be easier to open the IFC models individually if you want to merge objects within them.

Related Topics:

Reseparating previously-merged objects in an IFC model

Splitting objects in an IFC model

Recombining previously-split 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