Space Efficiency in Contemporary Supertall Office Buildings

Abstract

Space efficiency in supertall buildings (300m+) is one of the most critical design parameters to make a project feasible. This issue becomes even more important in office buildings where the ability to increase rental income is a crucial indication of proper planning. This study analyzed space efficiency in contemporary supertall office buildings. Data were collected from the 44 buildings through literature surveys and the case study method to examine space efficiency and main architectural and structural parameters affecting it to contribute to designing more feasible office towers. The main findings of this study indicated that: (1) central core was the most preferred type; (2) frequent use of free and tapered forms were identified; (3) composite use was dominant over steel and concrete utilization; (4) the most used structural system was the outriggered frame system; (5) space efficiency decreased as the height of building increased, where core area and planning were the most decisive factors; and (6) when groups of building form were compared with each other, no significant differences were identified among their effects on space efficiency and similar results were valid for structural systems. This study aids and directs architects in the sound planning and development of supertall office projects.