In 1923 Torroja began work for the Hidrocivil company, headed by the engineer José Eugenio Ribera. He planned and directed various types of projects, including the foundations of bridge piers, bridges, water supply and sanitation works, and various urban buildings. Torroja's first large project was the
Tempul cable-stayed aqueduct (1926) in
Guadalete, Jerez de la Frontera, in which he used pre-stressed girders. In 1928 he established his own office. Modesto López Otero, director for the
Madrid University City (
Ciudad Universitaria de Madrid) project, formed a diverse team of young architects to design the various buildings. Torroja joined the group in 1929. He worked with
Manuel Sánchez Arcas, sharing his interest in new architectural forms that rejected preconceived formulas. The first collaborative work of Torroja and Sanchez Arcas was the pavilion of the Construction Commission of the university city, completed in June 1931. They worked on the heating plant (
Central Térmica) and the clinical hospital for the university city. Sánchez Arcas and Torroja designed an enclosed and semi-spherical shell for the 1932
Algeciras market hall. The thick concrete roof was high, vaulted, supported on eight pillars. As an engineering work it is considered Torroja's masterpiece. Sánchez Arcas and Torroja founded the journal
Hormigón y Acero (Concrete and Steel). In 1934 they founded the
Instituto Técnico de la Construcción y Edificación (ITCE, Technical Institute of Construction and Building). Other founding members were the architect
Modesto López Otero (1885–1962) and the engineers
José María Aguirre Gonzalo (1897–1988) and
Alfonso Peña Boeuf (1888–1966). The ITCE was a non-profit organization dedicated to developing and applying technical innovations in engineering civil structures. In 1952, Eduardo Torroja – along with André Balency-Béran, Emile Nenning, Louis Baes, Hubert Hüsch and Georg Wästlund – founded the Comité Européen du Béton, which is now the
Fédération Internationale du Béton. The Comité Européen du Béton sought to coordinate the research effort on structural concrete in Europe following the end of the Second World War. , Madrid, Spain Eduardo Torroja designed the
thin-shell water tower in Fedala and the roof of the "
La Zarzuela" racetrack in Madrid in the form of a
hyperboloid. He also used steel with great élan, as at the roof of the Football Stadium,
Barcelona (1943). He designed innovative structures in numerous parts of the
world, including
Morocco and
Latin America. His books include
Philosophy of Structures (1958) and
The Structures of Eduardo Torroja (1958). == Personal characteristics ==