There are 132 Model Categories in Revit 2021 Name = Piers Id = -2006131 Name = MEP Fabrication Hangers Id = -2008203 Name = Ramps Id = -2000180 Name = Cable Tray Fittings Id = -2008126 Name = Air Systems Id = -2001008 Name = Structural Connections Id = -2009030 Name = Planting Id = -2001360 Name = Electrical Analytical Transformer Id = -2001077 Name = Mass Id = -2003400 Name = Air Terminals Id = -2008013 Name = Communication Devices Id = -2008081 Name = Piping Systems Id = -2008043 Name = MEP Fabrication Containment Id = -2008212 Name = Plumbing Fixtures Id = -2001160 Name = Ceilings Id = -2000038 Name = MEP Fabrication Ductwork Id = -2008193 Name = Bridge Framing Id = -2006241 Name = Pipe Segments Id = -2008163 Name = Conduit Fittings Id = -2008128 Name = Sprinklers Id = -2008099 Name = Doors Id = -2000023 Name = Lighting Devices Id = -2008087 Name = RVT Links Id = -2001352 Name = Curtain Systems Id = -2000340 Name = Parking Id = -2001180 Name = Ducts Id = -2008000 Name = Bridge Cables Id = -2006133 Name = Imports in Families Id = -2000196 Name = Conduits Id = -2008132 Name = Flex Pipes Id = -2008050 Name = Structural Trusses Id = -2001336 Name = HVAC Zones Id = -2008107 Name = Electrical Spare/Space Circuits Id = -2008152 Name = Medical Equipment Id = -2001046 Name = Site Id = -2001260 Name = Duct Systems Id = -2008015 Name = Fire Protection Id = -2001049 Name = Abutments Id = -2006130 Name = Duct Placeholders Id = -2008160 Name = Duct Accessories Id = -2008016 Name = Furniture Systems Id = -2001100 Name = Telephone Devices Id = -2008075 Name = Lines Id = -2000051 Name = Wires Id = -2008039 Name = Pipes Id = -2008044 Name = Electrical Analytical Transfer Switch Id = -2001023 Name = Audio Visual Devices Id = -2001055 Name = Signage Id = -2001058 Name = Topography Id = -2001340 Name = Project Information Id = -2003101 Name = Electrical Circuits Id = -2008037 Name = Analysis Display Style Id = -2000304 Name = Pipe Insulations Id = -2008122 Name = Flex Ducts Id = -2008020 Name = Structural Area Reinforcement Id = -2009003 Name = Structural Framing Id = -2001320 Name = Electrical Fixtures Id = -2001060 Name = Data Devices Id = -2008083 Name = Lighting Fixtures Id = -2001120 Name = Duct Insulations Id = -2008123 Name = Cable Tray Runs Id = -2008150 Name = Generic Models Id = -2000151 Name = Analysis Results Id = -2000303 Name = Electrical Equipment Id = -2001040 Name = Curtain Panels Id = -2000170 Name = Fire Alarm Devices Id = -2008085 Name = Temporary Structures Id = -2001039 Name = Roads Id = -2001220 Name = Floors Id = -2000032 Name = Point Clouds Id = -2010001 Name = Windows Id = -2000014 Name = Structural Path Reinforcement Id = -2009009 Name = Rebar Shape Id = -2009013 Name = Parts Id = -2000269 Name = Columns Id = -2000100 Name = Routing Preferences Id = -2008125 Name = Bridge Decks Id = -2006135 Name = Vertical Circulation Id = -2001052 Name = Filled region Id = -2000190 Name = Structural Fabric Reinforcement Id = -2009016 Name = Raster Images Id = -2000560 Name = Vibration Management Id = -2006261 Name = Electrical Analytical Bus Id = -2001021 Name = Mechanical Equipment Sets Id = -2000985 Name = Curtain Wall Mullions Id = -2000171 Name = Walls Id = -2000011 Name = Conduit Runs Id = -2008149 Name = Pipe Fittings Id = -2008049 Name = Structural Columns Id = -2001330 Name = Pipe Placeholders Id = -2008161 Name = Structural Rebar Couplers Id = -2009060 Name = Cable Trays Id = -2008130 Name = Structural Stiffeners Id = -2001354 Name = Entourage Id = -2001370 Name = MEP Fabrication Pipework Id = -2008208 Name = Zone Equipment Id = -2001010 Name = Water Loops Id = -2001009 Name = Nurse Call Devices Id = -2008077 Name = Areas Id = -2003200 Name = Materials Id = -2000700 Name = Roofs Id = -2000035 Name = Structural Fabric Areas Id = -2009017 Name = Structural Rebar Id = -2009000 Name = Plumbing Equipment Id = -2008234 Name = Shaft Openings Id = -2000996 Name = Duct Fittings Id = -2008010 Name = Specialty Equipment Id = -2001350 Name = Pipe Accessories Id = -2008055 Name = Masking Region Id = -2000194 Name = Expansion Joints Id = -2006271 Name = Structural Foundations Id = -2001300 Name = Curtain Grids Id = -2000173 Name = Security Devices Id = -2008079 Name = Food Service Equipment Id = -2001043 Name = Bearings Id = -2006138 Name = Railings Id = -2000126 Name = Mechanical Control Devices Id = -2008232 Name = Electrical Analytical Power Source Id = -2001026 Name = Duct Linings Id = -2008124 Name = Structural Beam Systems Id = -2001327 Name = Sheets Id = -2003100 Name = Casework Id = -2001000 Name = Mechanical Equipment Id = -2001140 Name = Structural Tendons Id = -2006274 Name = Switch System Id = -2008101 Name = Furniture Id = -2000080 Name = Rooms Id = -2000160 Name = Hardscape Id = -2001036 Name = Coordination Model Id = -2000982 Name = Stairs Id = -2000120 Name = Detail Items Id = -2002000 Name = Spaces Id = -2003600