About Joint Members Features
Joint Members features are created in assemblies to contain the reference components (parts and sub-assemblies) that are fastened together, and the features such as welds that reference the Joint Members feature. They help you organize the joined components so you can access them in the Weld and Joint Tree.
Joint Members features can contain multiple sets, for instance, several Spot Weld features.
You can create a Joint Members feature by using either of these tools:
• 
Joint Members—Use this tool to create Joint Members features in assemblies that are relatively small and simple, without many levels of hierarchy.
Joint Members—Use this tool to create Joint Members features in assemblies that are relatively small and simple, without many levels of hierarchy.• 
Joint Members Assistant—Use this tool to create, redefine, or activate a Joint Members feature in larger, more complex assemblies. It includes the ability to run analyses to alert you of these issues:
Joint Members Assistant—Use this tool to create, redefine, or activate a Joint Members feature in larger, more complex assemblies. It includes the ability to run analyses to alert you of these issues:◦ Shared Assembly
In most cases, a Joint Members feature should be created at the lowest possible level of hierarchy. You have the option to create it at a higher level when it makes sense regarding the welding process.
When you create a Joint Members feature and run an analysis, if a lower level of hierarchy is identified at which you could create the feature, you will be able to choose at which level to create the feature.
◦ Duplicate Joint Members
Running an analysis can help you detect sub-assemblies that are shared by more than one component, and Joint Members features that contain the same set of parts.
You activate a Joint Members feature so you can work on the components and features that it holds by right-clicking the Joint Members feature and clicking 
Activate.
Activate.You can require that Weld features must be connected to a Joint Members feature by setting the weld_joint_members_mandatory configuration option to yes.
Joint Members features are exported to the xMCF file within the custom_attributes tag.