International Association for Shell and Spatial Structures (IASS), founded by Eduardo Torroja in 1959, is a non-profit organization.
It has as its goal the achievement of further progress through an interchange of ideas among all those interested in lightweight structural systems such as lattice, tension, membrane, and shell structures, in particular architects, engineers, builders and academics.
The Association welcomes to membership all individuals and organizations who share its aims.
To achieve its goals, the Association undertakes the following activities:
The Association is governed by its Executive Council, elected by the Members. The Council, in turn, elects the President, Vice Presidents and Treasurer, and appoints Working Group chairmen. Further details about the organization and administration are given in the page Organization of the IASS
Since the founding of the IASS, the Association Secretariat and Headquarters are at the Laboratorio Central de Estructuras y Materiales of Centro de Estudios y Experimentación de Obras Públicas (CEDEX), in Madrid, Spain.