different , unfortunately, the buildings are built exactly the same, while when we build a building in chah bahar, for example , it must be different from the building we build in, for example, urmia, which has a completely different climate. have both in terms of form and materials. and whether it is in terms of the characteristics of even the inner space of the raw materials, whether the structures are concrete or metal is effective. in many parts of the country, we are building good structures and we are making good concrete, but this does not generalize to the whole country and all parts of the country right now . as i am talking to you, in many parts of the country, there is access to standard sand, which is the main form of concrete. no , because the production of steel is really very expensive and very important, in terms of cost and type, in fact, the use of our mines is very important, although the manufacturers of steel structures they say that they have reduced the total cost of this structure by using solutions, but mass builders consider concrete construction to be more economical. t

different climates , unfortunately, the buildings are built exactly the same, while when we are in chah bahar, for example, we build a building with the same weather conditions and climate with a building that we build in urmia city, which is a completely different climate. it must be different in terms of form, materials, and even the inner space of the raw materials , whether the structures are concrete or metal, it is effective in many ways. in some parts of our country, we are making good structures and we are making good concrete, but this provision is not available to the whole country and all parts of the country. right now, as i am talking to you, in many parts of the country, there is access to standard sand, which is the main form of concrete. it is not there now because of steel production. it is really very expensive and very important in terms of cost and type. in fact, the use of our mines is very important , although the manufacturers of steel structures say that they have reduced the cost of this structure by using solutions, but mass builders structure concrete is considered