© 2020. Mohammed Mashary Alnaim. This is a research/review paper, distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License http://creativecommons.org/licenses/by-nc/3.0/), permitting all non commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Global Journal of Science Frontier Research: A Physics and Space Science Volume 20 Issue 9 Version 1.0 Year 2020 Type : Double Blind Peer Reviewed International Research Journal Publisher: Global Journals Online ISSN: 2249-4626 & Print ISSN: 0975-5896 The Concept of Access and the Mechanisms of the Threshold Space in Arab Traditional Built Environment: The Case of Najd, Saudi Arabia By Mohammed Mashary Alnaim University of Hail Abstract- Contemporary built environments experience a vast number of factors due to globalization, which effected and influenced how the built form is generated and used. The relationship between the urban and the building levels is a crucial aspect that needs a thorough investigation to understand how these two levels can integrate and complement the built environment's overall identity. This paper examines the concept of access and its location within the urban fabric and how an access influenced the formation of physical and nonphysical threshold spaces to overcome the number of socio-cultural issues. Space Syntax convex map and justified access graphs were used to understand the connectivity, density, and integration of the access and the threshold space in relation to the overall built form. Keywords: access, threshold, urban fabric, traditional architecture, najd, saudi arabia. GJSFR-A Classification: FOR Code: 249999 TheConceptofAccessandtheMechanismsoftheThresholdSpaceinArabTraditionalBuiltEnvironmentTheCaseofNajdSaudiArabia Strictly as per the compliance and regulations of: