Chevron Braced Frame (CBF) systems are one of the most efficient structural systems for resisting laterals loads, however, non-ductile braces and their buckling can seriously undermine their energy dissipation capacity. A special CBF (SCBF) system has been developed which not only uses ductile braces, but also provides additional strength to supporting beams to resist additional forces in the post-buckling range to ensure superior performance in terms of stability of the system and energy dissipation potential. Similarly, the Special Truss Moment Frame (STMF) system uses a special segment for yielding under vertical shear providing a suitable mechanism for energy dissipation during earthquakes. Design provisions developed for these two systems are now part of the US seismic codes.