In recent years, due to the rapid development of the fourth industrial revolution and new platforms of information technologies, intelligent systems have received widespread attention in many industries and have brought the potential to improve the efficiency of the construction industry. These facts led to the appearance of a new concept in construction industry called Construction 4.0. Therefore, this article seeks to explore the state of implementation of Industry 4.0 technologies in the construction industry and analyze their impact on the formation of the Construction 4.0 concept. In order to achieve the aim of this article, a literature review was conducted using the most relevant publication in this field. Moreover, authors carried out a bibliometric analysis among 195 selected research articles related to the Industry 4.0 and Construction 4.0 to identify interconnections between these concepts. The results show that Industry 4.0 has the greatest impact on productivity growth in construction and that interest in digital technologies is growing every year, but their penetration into the construction industry is currently slow and limited. The authors suggest that further research needs to be focused on future ethical issues that may arise and on synergies between Construction 4.0 technologies.

Construction industry is a generally risky business; it remains one of the most dirty, difficult and dangerous with poor working conditions. Despite recent efforts to improve site safety, it still accounts for a disproportionate number of occupational-related fatalities what is supported by statistics. According to the International Labour Organization, it accounts for 30-40% of the world's fatal injuries. In The European Union around thirteen employees out of every one hundred thousands are killed each year. Hence, construction site safety is a matter of global concern. However it is not easy to describe and define how to deport safely at some actual site because the workers are exposed to many safety risks varying in connection with conditions of the construction realization and with technologies using. The paper provides a brief knowledge from the study comparing the construction safety in Europe and North America referencing to presented statistics. There are also analyzed, described and systemized the principal groups of construction safety risks; described the interdependencies among safety risks, affecting by spatial, technological and time parameters of the building process, as well as by the site conditions.

Definition of types, amount and positions of cranes in construction site planning has a big impact on the overall productivity and cost effectiveness of a construction project. It is not rare, that engineers during preparation phase of construction fault in crane selection. It implies big financial losses for the company because of wrong crane rent. In visualisation of mobile crane operation in 3D is noticeable that working radius of the crane is considerably less then number listed in crane technical documentation (capacity chart). The built construction itself can reduce the crane radius when the crane boom snags the built object edge. Several computer applications were developed in order to help practitioners in selecting and using of cranes. In the paper is presented one version of non-commercial software tool (Mobile Crane Simulator) useful in construction preparation as a tool for selecting and locating of the mobile crane at construction sites. The tool was developed by authours of the paper. The principles of the tool creation are also explained.

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