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Ainechi S, Valibeig N. Architectural and Structural Analysis of Special Karbandis of Tabriz Historical Bazaar. JRA 2021; 7 (2) :73-89
URL: http://jra-tabriziau.ir/article-1-275-en.html

Iranian architectures have always tried to hide unbeautiful structural elements behind ceiling (covering) elements. Such a complexity and ambiguity makes understanding of karbandies more difficult. The karbandies of Tabriz Bazaar timches’ roofs are different from karbandies of other places, structurally. Hence, they are called specific. In other words, main ribs used in the timches do not follow the simple geometry of Karbandi, which can be seen under the roof. Moreover, there are various karbandies, which have the same theoretical geometry, but they find different forms in implementation. Identifying and analyzing Tabriz bazaar specific karbandies, enables us to find out their form structure and implementation manner. Considering lack of professional writings in the field of specific karbandies, contradiction of most of such writings about structural function of ribs in this structure and lack of identified definition, make it necessary to do research about them. In this research, relying on the library resources, field studies and interpretation and analysis of the findings, a study was conducted on the geometry and construction technology of specific karbandis of Tabriz Historical Bazaar covers and their latent concept were scrutinized. Hence, investigating the limited documents obtained from the conducted restorations and implementation stages of specific karbandies, the geometry of these hidden ribs at roof top were compared to its internal space.  Nowadays many Tabriz bazaar vaults collapse and are in an irregular situation that has brought the marketers at serious risk. This erosion situation has been growing and the unconscious disregard for the restoration of karbandis, regardless of their initial structure. By recognizing and analyzing the special karbandis of the Tabriz bazaar, we can understand the form and geometry of the form and its implementation. In this paper, based on library resources, field studies, and the analysis and interpretation of the findings, a study on the geometry and technology of constructing special karbandis for the cover of the historical bazaar of Tabriz has been completed and the implied concepts have been refereed. For this purpose, by examining the small documentation of the repairs and the implementation steps of the special applications, the geometry of the hidden ribs of this type of karbandis was compared from the roof and its image from inside the space. Findings of the study indicated that to analyze Tabriz bazaar specific karbandies, it is necessary to consider their form and structural features, application and building role, ribs materials and their structural role.