Evaluating the influence of rules and regulations of urban constructions on height plan implementation (Revision of comprehensive plan for Isfahan-district 4)

The fast growth of urbanism in Iran throughout the last half-century resulted in upholding the expansion of cities as well as the promotion of constructions thereof. Of significant problems and challenges Iran’s cities and metropolises ,in particular, are exposed to, is the failure of urban development plans in control of city height and density. A matter which has led to 100% expansion of the city area with a population density about 100 individuals in each acre of Isfahan metropolis, in a way that is far beyond the urban predicted developing plans in surrounding areas and mostly agriculture fields. As for the existence of about 2500 acres approved archaic fabric as well as similar disapproved archaic fabric in comparison with the 21000-acre area of the city, it has been ineffective in the renovation and development of inner fabrics. There are multiple books and studies regarding the performance of these plans mostly on impressibility of these plans from external factors such as economic, social, politic conditions and the evaluation of their implementation level under their influence. What is discoverable in this study in a descriptive-analytic way and in the scale of one district out of 15 districts of Isfahan is the exploration of two residential fabric physical factors, i.e., segmentation and passage network patterns on attested heights by-law for district-4 for the evaluation of implementation level of predicted height and density in its last urban development plan, that is, comprehensive plan revision enacted in 2014. According to the records and maps achieved from the present study, the height plan implementable in district 4 is in contrast with attested height plan; likewise, the 24% density predicted in its perspective is not accessible.