Pinned connections can be used to create spatial structural systems. Questions of stability must be given special attention. In the proposed  system several types of pinned connections are used. The joint connection at the bottom of pillars has a lateral stability, but since it’s a hinge it must be stiffened in another axis.

The extension connection of pillars is stiff. Elements take the torque, the pin takes axial tension and compression forces. Cables for stiffening are attached with hinges which can only take tension. A total of three cables are needed. The roof elements are also adjustable and allow different variations, their connections to pillars are made laterally stable.