Islamic architecture is considered to be a unique example that reflects the impact of structural formation systems in establishing its form; the structural relations represent the most important items and bases of architectural structures, especially at the abstract level. The structural relations form the basic foundation which represent the most important aspect in producing the formal structure of any building thus they are considered to be the most important method in describing the physical reality of architectural production . Stemming from the above fact, the study focuses on the structural relations that form the plans. The problem of the study is that structural relations which form the plans of Khans buildings in Islamic architecture are not clear. The aim of the present study is to clarify the specialty of Muslim architect intellectuality in the formation of a particular mechanism or method to form and design studied plans with specific functions like khans. To achieve the aim of the study a theoretical framework of structural relations is built depending on modern studies on formation of those relations on the bases of the statistical analytical method. The results arrived at show that the structural relations which form and construct the plans of Khans buildings are characterized by uniqueness as a distinguishing character of Islamic architecture some of these types of building are the khans, though they differ in their architectural design, their date and ever their geographical location. This in turn gives an indication and proof of the Muslim architect creative role in determine the distinguished identity of his architecture with the incentive of Islamic cultural intellect held by that architect all over the places of his civilization whenever and wherever he exists.
Key Word : Formal Composition , Relationships Formative , Khan , Islamic architecture