Place standard rebar shapes that snap to adjacent standard rebar. The constraint remains when you place, move, drag, or copy and paste rebar.
Reinforcement panel
(Rebar).
Rebar Constraints panel
(Constrained Placement).

| Cut and paste | Increase type size |
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To remove the placement constraints, select a constrained rebar and click Modify | Structural Rebar
Rebar Constraints
(Edit Constraints) and assign new targets to the desired handles.