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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: 1A Comparative Analysis of Skyscraper Design Characteristics in the Middle East, Asia, and North America(Hapres Limited, 2025) Ilgın, H.; Aslantamer, Ö.The proliferation of skyscrapers in rapidly urbanizing regions necessitates a comparative understanding of architectural and structural design strategies. The Middle East, Asia, and North America have emerged as dominant centers of high-rise development, each influenced by unique environmental, cultural, and economic conditions. This study employs a case study approach, analyzing 133 skyscrapers (≥300 m) using qualitative and quantitative metrics. The analysis focuses on core typology, structural systems, materials, and architectural form, based on data extracted from the Council on Tall Buildings and Urban Habitat (CTBUH) database. Findings reveal regional distinctions: Asian skyscrapers favor tapered and composite designs with outriggered frame systems; Middle Eastern towers emphasize prismatic forms using concrete; and North American high-rises balance setback and prismatic forms with concrete and shear-frame systems. A central core layout dominates all regions, driven by efficiency and safety considerations. These insights offer valuable benchmarks for architects, engineers, and urban planners aiming to optimize skyscraper design in dense urban contexts. These insights offer valuable benchmarks for architects, engineers, and urban planners aiming to optimize high-rise design in dense urban contexts. © 2025 Elsevier B.V., All rights reserved.
