Part Types

The Part Type parameter provides additional subclassification of a family category, and determines the behavior for the parts in the family.

The part type serves 2 functions:

• To only allow replacing a particular part with a similar part in a building project. Generally the Type Selector allows you to replace a family of one category with any other family of the same category. However, there are times when this is not appropriate. For example, for fittings it would not be valid to replace a cross with a transition. So there is a level of filtering built into the Type Selector for Revit.
• To determine the part type family. The ASHRAE Duct Fitting Database, Version 5.00.00 is integrated with Revit. This allows calculating fitting losses based on a loss table. To accurately look up the correct fitting in the database, the part type must be defined.

If a family category provides a Part Type parameter, the Part Type values available depend on the family category. The following table shows which part types apply to which family categories:

Family Categories	Part Types
Air Terminals	Normal
Cable Tray Fitting	Channel Cross, Channel Elbow, Channel Multi Port, Channel Offset, Channel Tee, Channel Transition, Channel Union, Channel Vertical Elbow, Ladder Cross, Ladder Elbow, Ladder Multi Port, Ladder Offset, Ladder Tee, Ladder Transition, Ladder Union, Ladder Vertical Elbow
Communication Devices	Normal, Junction Box
Conduit Fittings	Cap, Cross, Elbow, Junction Box Elbow, Multi Port, Tee, Transition, Union
Data Devices	Normal, Junction Box
Duct Accessories	Attaches To, Breaks Into, Damper
Duct Fittings	Cap, Cross, Elbow, Lateral Cross, Lateral Tee, Multi Port, Offset, Pants, Tap - Adjustable, Tap - Perpendicular, Tee, Transition, Union, Wye
Electrical Equipment	Equipment Switch, Other Panel, Panelboard, Switchboard, Transformer
Electrical Fixtures	Junction Box, Normal, Switch
Fire Alarm Devices	Junction Box, Normal
Lighting Devices	Junction Box, Normal, Switch
Lighting Fixtures	Junction Box, Normal
Mechanical Equipment	Breaks Into, Normal
Nurse Call Devices	Junction Box, Normal, Switch
Pipe Accessories	Attaches To, Breaks Into, End Cap, Inline Sensor, Normal, Sensor, Valve - Breaks Into, Valve Normal
Pipe Fittings	Cap, Cross, Elbow, Flange, Lateral Cross, Lateral Tee, Mechanical Coupling, Multi Port, Spud - Adjustable, Spud - Perpendicular, Tee, Transition, Union, Wye
Plumbing Fixtures	Normal
Security Devices	Junction Box, Normal, Switch
Sprinklers	Normal
Telephone Devices	Junction Box, Normal