Spatial rigidity is the ability of a building's structure to resist deformation and displacement in three spatial directions under applied loads.
It refers to the behaviour of the structure as a whole rather than individual elements. It also describes how a building carries horizontal and spatial loads. It results from the cooperation of load-bearing elements such as walls, floors, bracing discs and structural connections, which together form a coherent spatial system.
It is important for limiting the horizontal displacement of the building, particularly under the influence of wind, imposed loads and uneven ground actions.
Its level depends on the geometry of the structure, the arrangement and stiffness of the stiffeners, the type of connections and the accuracy of manufacture. Properly designed spatial stiffness contributes to stability, durability and user comfort of the facility over its lifetime.
