1. Configuration complexity is obviously a d r i v e r i n determining adequate design. Flags t o look f o r and work thoroughly involve symmetry versus nonsymmetry, multi-bodies, load paths, e t c . Another key f l a g d e a l s with j o i n t s , whether they a r e welds, b o l t s , connectors, o r fastene r s . S t r u c t u r e must be assembled with j o i n t s . One can minimize t h e system complexity by appropriate s e l e c t i o n . S t r e s s concentrations a r e another f l a g . They should be reduced as much a s possi b l e , otherwise controlled by proper design.