Is the term used to describe a structural member of a project that is pre-fabricated in a manufacturing facility and then delivered to site. Part, member or structural member are sometimes used as synonyms.
Within the FabStation Assembly is used as a unit that you can view or put on Fabrication/Inspection. Also, you can search for the specific assembly in the project within the App, add comments into it, put it on hold etc.
Example of the Assembly: