To close off open structural members, you can add end caps, including internal end caps.
To apply fillets or chamfers to all end caps, under Corner Treatment, select Fillet or Chamfer.
You can offset an end cap from the inside face of a structural member by specifying a decimal Offset value in addition to the Thickness ratio.
You can set Outward and Inward end caps to be larger than the structural member's outside dimension for base plate or mounting pad applications. You can set the Thickness ratio to be larger than 1 for these applications.
You can add end caps only to profiles with linear edges.