ABSTRACT
Two works by the Spanish-born Mexican architect Juan Antonio Tonda Magallón are presented. They date from the period 1962 to 1975. He collaborated in the first of these works as structural consultant with the architect Alberto González Pozo, while he was the architect of the second work. Tonda was educated with Félix Candela, working in Cubiertas Ala. He started by analysing shell structures and participating in works direction. Although he was always in contact with Candela, he soon started to execute his own projects. Both of the works presented here employ original solutions using hyperbolic paraboloids. In the first he proposes a new arrangement of several sections of the paraboloid to form a portal in an opening which he covers with spans measuring from 11.0 m to 16.40 m. In the second solution, he proposes an alternative constructive system to using scaffolding and wooden shuttering, which he replaces by a spatial structure in rolled steel.
