Groups in Revit are a convenient way to place common elements multiple times in a project or family e.g. hotel rooms, apartments or repeating floors.
With each instance of a group that you place, there is associativity among them. For example, you create a group with a bed, walls, and window and then place multiple instances of the group in your project. If you modify a wall in one group, it changes for all instances of that group, simplifying the modification process.
Groups are created easily by selecting the model objects and then from the Ribbon select Create Group. Named the Group, press Enter and voila, job done.
The group can then be copied or placed by ‘drag and drop’ from the Project Browser> Groups> Model> ’Group Name’.
Groups can then be edited by picking the placed Group and then from the end of the Ribbon selecting Edit Group. Objects can be added or removed and / or modified. Clicking Finish will save the changes and all occurrences of the Group will then reflect the changes made.
So now to the title of this blog. The devil is in the detail.
Model Groups can only contain model geometry e.g. walls, doors and windows.
There are 2 ways of adding the annotations to the group.
Prior to creating the Model Group, place the required annotations (objects which are View dependant). When the Create Model Group dialog box opens, you will now realise that the full name of the dialog is actually Create Model Group and Attached Detail Group.
Revit will automatically create a Detail Group of any annotations selected and use a default name of Group 1. Rename this so that it refers to the Model Group name.
The second option is useful if the annotation is placed after the initial Model Group was created.
Select the placed annotation and under the Ribbon Annotate tab> Detail> Detail Group> Create Detail.
Name the Annotation Group and assign it to the relevant Model Group. Now whenever the Model Group is placed, it can be selected and the relevant Detail Group assigned. From the Ribbon> Modify Groups> Attached Detail Group.
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