The greatest form Los Manantiales is one of the examples of hyperbolic parabolic
saddles, the symmetrical shape is an eight-sided groined thin concrete vault shells
arrange of four intersecting multi span roof. The double curvature shell has edge with
ribs have small stiffness in normal direction. The bending and deflection in groined vault
cause of load bearing in surface; the free curve edge has rotating in upward surface and
downward surface