Studying the status of urban social capital indicates that it is declining in contemporary cities. The experts in the field of social science have seriously warned on the consequences of this decline, by examining the components of social capital which is the result of forming norms of collective life and social interaction. In this regard, urbanization knowledge seeks to strengthen social capital through targeted interventions and efforts to improve the quality of urban life. Social interactions are significantly important factors contributing to the social capital and one of the most effective ways of realizing social interactions is making and developing of "public urban places". Regarding the previous studies which show that public places are created for people's presence and social mobility, this study seeks the ways for strengthening social capital by interventions in public places and increasing their quality by determining the role of urban spaces in improving the status of social capital. For a better study of the subject, using a desk research method, field observation and scrolling through a questionnaire, the market pedestrian located in the central area of Tehran was studied. The collected data were analyzed by SPSS software and the results showed that interventions with the aim of pedestrianizing and attempts to make a high quality place increase presence of people and cause a high tendency to establish social interactions.in fact pedestrian-orientation of urban areas has facilitated face-to-face and collective communication by influencing the social trust and solidarity, also it has helped with strengthening the tendency to participate and cooperate. Hence, adoption of the pedestrian-orientation policy and efforts to improve the quality of public places, have enhanced the social capital of city.

An important aspect effective on city sustainability is 'Social sustainability' heeded such that numerous connoisseurs consider 'social wealth' a criterion of urban social sustainability. Also social rituals and values today reckon cultural source significance that when targeted on social relation production in society can develop social capital. An important bedding of ritual and urban social relations manifestation is urban public spaces. These spaces are considered association of nation shared perceptions carrying along socio cultural heritage, collective memory recreation and a site to present common social rites and values. Therefore, the significance of rituals at present just like urban public spaces during various cycles has impelled its essentiality to undertake replication on citizen's cultural socio and psychological needs. By application of analytical descriptive method and library studies, this article is in addition to studying and analyzing the relative concept to discover effective components on urban public spaces for boosting public investment in consideration of rites and ritual ceremonies. That is why these findings truly indicate that ritual ceremony is an occasion for nations that on the basis of inner self inclination originating from creeds and beliefs to voluntarily and spontaneously attend public spaces and participate in activities. Hence, the impression of rituals and its relation with nation presence has also a serious impact on spatial structure. In addition, by promotion of public attendance and targeted social relation level promotion in urban public spaces, social investment is also effected by components such as attachments, dependency, commitments, participation and belief and creeds fortifications.