Kerndragende

Kerndragende is a term used in architectural and structural engineering to describe a building system in which the main vertical and lateral loads are carried by a central structural core rather than by an external frame or by individual columns. The core typically consists of reinforced concrete or steel and houses functions such as stairs, elevators, and mechanical services along with shear walls or other stiff elements to resist wind and seismic forces.

In a kerndragende system, the core acts as the primary load-bearing element, transferring loads from floors down to the foundation. Floors connect to the core and to any peripheral framework, enabling the core to provide substantial stiffness and stability. This approach is often combined with other strategies, such as outriggers or peripheral columns, to optimize overall performance and to tailor stiffness and drift characteristics for a specific building.

Design considerations for kerndragende structures include ensuring adequate fire resistance and robustness of the core, integrating mechanical and safety services, and balancing architectural flexibility with the core’s spatial demands. The central location of the core can improve lateral resistance and reduce torsional effects on the upper levels, but it also occupies valuable interior space and can constrain floor plans and renovations.

Applications of kerndragende systems are common in high-rise buildings, including tall residential and office towers, hospitals, and other structures where strong lateral stiffness and seismic performance are important. The choice of kerndragende design influences construction methods, material selection, and long-term adaptability of the building.

See also: load-bearing walls, shear walls, core-and-outrigger systems.