In a Structural Wall, what is the difference between the structural usage: bearing, shear and structural combined

[susanaapolayo]

This is more like a concept question.

I understand that the 'Structural Usage' instance parameter, and the 'Wall Function' type parameter, allow us filter our walls and create schedules with this information, etc.

But I need some examples, dear Engineers ♥️.  In what cases I apply bearing, shear or structural combined. I need the concept of bearing, shear or structural combined and some examples. 

If I have, for example, a 'Retaining' Wall, a 'Core-Shaft' wall or a 'Foundation' wall. What 'Structural Usage' can I apply for each one? 

Also, If I create structural walls, can I assign 'Interior' Wall Function? or 'Interior' is more for architectural walls?

Help me, please. Thanks. 

[L.Maas · Accepted solution]

Below from THIS page which might help you further

Structural Walls

All wall types within the Basic Wall family have an instance property called Structural Usage, which can have the following values:

Shear	Rigid planar surfaces that inherently resist lateral thrusts of shear.
Bearing	Walls that support a vertical load in addition to their own weight.
Non-bearing	Walls that define and divide spaces and support no vertical load except their own weight.
Structural combined	Walls that serve more than one purpose.

When you use the Wall tool, Revit Architecture assumes you are placing partition walls. Whichever wall type you select, the default Structural Usage value is non-bearing. When you use the Structural Wall tool, and select the same wall type, the default Structural Usage value is bearing. In either case, the value is read-only, but you can change it after the wall is placed

[susanaapolayo]

Thanks @L.Maas