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, EndCap, Inline Sensor, Normal, Valve - Breaks into |
| 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 |