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Article A Comprehensive Study of Space Efficiency in Tall Buildings: The Australian Perspective(Kauno Technologijos Universitetas, 2025) Ilgın, H.; Aslantamer, Ö.Spatial efficiency in Australian towers is shaped by a multifaceted interaction of many parameters such as architectural and structural considerations. However, there are no comprehensive studies available on space utilization in Australian high-rise towers. The article addresses this gap by investigating 32 case studies. This study aims to investigate how contemporary Australian tall buildings achieve spatial efficiency by analyzing the relationship between architectural and structural parameters and internal usable area ratios. Key findings: residential function, centrally-located core layouts, and prismatic arrangements are the most widespread trends; concrete is the favored construction material, with the shear-walled frame system being the most commonly used structural system; average space efficiency is 82%, with a core-to-GFA ratio of 16%. The paper offers valuable understandings for construction experts to inform design decisions in high-rise construction projects within the Australian context. © 2025, Kauno Technologijos Universitetas. All rights reserved.Article Citation - Scopus: 1Space Efficiency in Tall Timber Buildings: A Comprehensive Review(Highlights of Science, 2025) Ilgın, H.; Aslantamer, Ö.Tall timber construction is gaining popularity due to its notable environmental and economic benefits throughout its lifecycle. Maximizing space efficiency in these buildings is a key factor in ensuring project viability. However, there has been a lack of comprehensive research on the space efficiency of these projects. This study focused on analyzing 50 tall buildings (over eight stories) globally to improve insights into the design elements that affect space use. The key findings include: i) predominant architectural configurations incorporate residential functions, a centrally positioned core, and prismatic building forms; ii) composite materials are the most utilized, with shear-walled frame systems being the preferred structural solution; and iii) average space efficiency is 84%, with core areas accounting for 11% of the gross floor area, ranging from 71% and 4% at the lower end to 93% and 21% at the upper end. This study provides valuable guidance for architects and other key participants engaged in the planning and construction of tall timber buildings. © 2025 Ilgın and Aslantamer.
