مشکلات ساختمان ها با عدم اسناد اولیه طراحی

This paper discusses the problem of existing buildings which lack basic design documentation. This situation might have been caused by the old age of buildings or the loss of documentation. To solve this problem, time-consuming and expensive steps have to be taken, such as assessing the strength of construction materials, identifying loads, evaluating the technical state of structures and their strengthening. The authors present cases in which similar problems were solved.