Abstract
The coupling between forms and forces became, at the end of the previous century, one of the major issues for shells and spatial structures, namely for those that are pre-stressed. The denomination "Structural Morphology" covers a field of investigation and research that was increasing in the recent years. It was implicitly implied in design processes of pioneers, it was obviously a major concern for famous shell designers. Founders of the Structural Morphology Working Group of the IASS contributed to its definition and progress inside the association. Our time is characterized by an increasing number of numeric tools devoted to morphology; and the actual actors of this discipline have to face new challenges like simplicity of realization of complex morphologies, or monitoring of transformable shapes. This section aims to provide some features of this fascinating discipline: structural morphology.