Unlike square-off joins, miter joins do not cutback, allowing geometry to create a flush connection between 2 beams.
The 2 beams must be co-planar to create a miter join. They must also be of the same family type. Any other beams that share the join will cut back accordingly.
| Coarse level of detail (symbolic) | Medium/Fine level of detail (physical geometry) |
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Beams in a co-planar join share the same plane and have unadjusted cross-sectional rotation parameters.
Beams that share the same vertical plane must have the same cross-sectional rotation to have a miter join. The vertical plane is a plane perpendicular to the work plane. A miter join will be created by default for beams that are created within the same vertical plane.
This is the case for trusses. 
Other beam join considerations include the following.
- Hidden lines within the beam family do not trim or extend to a miter plane.
- Beam shape handles do not participate in extensions.
- The Beam/Column Join Editor is not available when a concrete beam is participating in the end join.
- Mitered beams are cut by the Cut Plane in Plan Views using Medium/Fine Detail Level. This continues if the miter join is removed.