Pattern and Mirror Support
You can pattern and mirror structure system members using the Linear Pattern, Circular Pattern, or Mirror tools.
In the Pattern PropertyManager, under Bodies, you can specify structure system features or individual members to pattern. You can also mirror members by specifying structure system features or individual members under Bodies to Mirror in the Mirror PropertyManager.
You can add secondary members as a separate structure system feature between patterned and mirrored members.
You can also create secondary members as part of a new structure system by selecting members from existing structure system features.