Rebar constraints are part of an internal mechanism used to set and lock the geometry of each rebar instance with respect to its concrete host element.
In these release you can now apply overrides to the default host constraint behavior on a selected rebar element. Once you select a rebar the Edit Constraints option is available. Rebar constraints apply to rebar cover, other rebar instances in the host, and the host surface.
This feature improves the existing rules for rebar placement. It gives us a customized way to have a better control on how rebars are placed in a concrete formwork.
This enables reinforcement to be updated correctly based on any calculated changes, and helps keep designs coordinated and accurate.