Gravity Point and Element Mass

Smart Assemblies can calculate Element Masses and insert a Gravity Point at the center of gravity of the Assembly. After the Smart Assembly has been created, all elements will have Element Mass and Assembly Mass parameters with calculated values.

To calculate Structural Rebar Element Mass, you must create an assembly from a 3D view where the visibility of solid rebar is enabled. Also, the detail level of the 3D view should be set to Fine.

The mass of Fabric Sheets is not calculated because they are not solid objects in Revit and have no influence on the location of the Gravity Point.

Also, you can use the checkbox in the Common Options and the software will calculate rebar mass even if the requirements above are not met:

To insert the Gravity Point, a few requirements must be fulfilled:

All solid elements of the given Assembly must have a Material with Physical properties assigned, including the Density parameter.
In Shop Drawing Configurations, 'Insert Gravity Point (GP)' must be enabled.

If you get a warning message like the one below, it means that at least one of your elements/solids has an incorrect material or no material assigned.

You should make sure that all solids in that Family have Materials with Physical properties assigned.

By default, the Gravity Point is visible in general views as a Generic Model element, but you can control its visibility with standard Revit Visibility/Graphics options.

To make it visible in Assembly views, you have to enable 'GP is visible' in the Shop Drawings Configuration.

The Gravity Point can be measured automatically with Smart Dimension or with settings in Smart Assemblies Dimensioning rules.

To measure it with Smart Assemblies use these settings:

Tick ON 'Insert Gravity Point' and make it visible in the view you want (in the SDC).
In the Dimensioning Rules window, tick ON 'Note' and 'Dimension' checkboxes for Gravity Point in the Dimensioning Priority & Notes group.

Dimensions and Notes will be generated in selected views:

Smart Assemblies can work with multilayered elements as well: