Examples# Channel Channel Box beam Box beam Circular tube Circular tube Pipe Pipe I-beam I-beam Airfoil (MH-104) Airfoil (MH-104) Airfoil with C-Spar Airfoil with C-Spar Airfoil with D-Spar Airfoil with D-Spar Airfoil (Recover) Airfoil (Recover) UH-60A (Initial Failure) UH-60A (Initial Failure Analysis)