Floor Framing, Creating Joists from Polygons. There is a floor framing command that speeds up the creation of floor framing. It will place as many framing members as possible, in the direction you choose.
The command is only available on the Architect or Designer workspace. If you have Vectorworks Landmark, you will not be able to use this command, nor will you be able to use the framing member. The command is called Create Joists from Poly… but it will work on rectangles, polygons, polylines, extrudes, floors, columns or roof faces (if you use a roof face, the joists do not follow the slope).