Mass Instance Properties

Modify instance properties to generate mass floors, or to see the gross volume, surface area, and floor area of the selected mass.

To change instance properties, select the element and change its properties on the Properties palette.

Note: Gross Volume, Gross Surface Area, and Gross Floor Area are all parameters that can be scheduled.

Parameter	Description
Mass Floors	Click Edit to open the Mass Floors dialog. The dialog displays all levels in the project. When you select levels, Revit generates a mass floor for each selected level that intersects the mass. After generating mass floors, the software calculates the mass floor area, perimeter, volume, and exterior surface area. When the mass changes its vertical extents, only previously selected levels that currently intersect the mass produce mass floors. Each previously selected level is retained even if it does not produce a mass floor until unselected.
Gross Volume	This value is read only.
Gross Surface Area	This value is read only. The gross surface area includes the sides, top, and bottom of the mass.
Gross Floor Area	This read-only value changes when you add mass floors.