a Akbari - Student of M.Sc. in Architecture, Pardisan Fereydounkenar Institute of Higher Education.Corresponding author; Student of M.Sc. in Architecture, Pardisan Fereydounkenar Institute of Higher Education.
m Akbari - Student of M.Sc. in Architecture, Maziar Institute of Higher Education, Rooyan-Nour.
e Yavari - Student of M.Sc. in Architecture, Pardisan Fereydounkenar Institute of Higher Education.

Nano is extracted from the Greek word of Nanos meaning midget. Nanotechnology defines the behavior of materials in nanometer scales (m10-9), and in this scale, the materials behave completely different from the behaviors perceived in the macro scale as much as today, the researchers and industrialists in nano field try to use this technology to create optimized materials to be used in construction industry. The present paper has aimed at knowing the degree of knowledge of the construction industry engineers and experts on nano application in developing buildings, as the initial ground for its development and promotion in the society. In typology term, the research is descriptive-analytical and in the category, it is an applied research. The statistical society of the research consists of all members of Engineering Association Organization of Tehran. 332 of the members of mentioned Association were selected systematically at random by using Cochran Formula and were questioned directly by using questionnaires as data collection tool. The collected data was analyzed in SPSS software environment and was tested by using a comparative single T test. The results of the research showed that the mean average calculated on the knowledge of construction industry engineers and specialists in this city on the proportion of applications of processed materials by using nano was slightly more than the expected mean average.

Nanotechnology , Construction industry , Optimized materials , Tehran city , Engineers and specialists