In order to determine the importance of this parameter, the analysis was carried out of data from the data base for all types of construction works. At the same time, finishing works were observed as a single group, due to a large number of various works and relatively small number of injuries (103 injuries for 15 different types of works). Types of construction works at which these injuries occurred are shown in table 2. and are classified into two groups, according to whether they require a certain level of qualification (competence) or not. It should also be mentioned that the group of works that do not require professional training comprises work operations of mainly manual nature or the assistance to construction mechanization, but the operating of mechanization is seen as a separate type of works. Moving on the construction site (without performing any work) is separated since it is realized by all workers within all types of works. The results of the analysis are shown in Tab. 2. with the adopted division of the interval within the period of 5 years.