Organization of repair and restoration and reconstruction works at cultural heritage sites is based on substantiation of conditions and factors influencing choice of solutions on technology and organization of a set of works, on analysis of methods of development of organizational and technological solutions and modeling of work production schemes, as well as on selection of criteria for evaluation of work organization options and methods of selection of organizational and technological solutions. One of the key stages of preparation for repair, restoration and reconstruction of cultural heritage sites is development of a calendar plan and schedules and network models. They are mandatory in the work production project (WP), determining the terms, order and volumes of work. The work presents forms of calendar schedules and plans, as well as a network model of development of scientific and design documentation on preservation of cultural heritage sites (in general, by stages and local works) and a network model of preparation of repair and restoration and restoration and reconstruction works.

Keywords: historical and cultural monuments, cultural heritage sites, repair, restoration, reconstruction, schedules, calendar plans, network schedules

The conducted studies show that more than 70% of failures and breakdowns during repair, restoration and restoration works at cultural heritage sites occur as a result of uncoordinated actions of repairmen and restorers. This is due to the fact that repair and restoration works are carried out in complex and cramped conditions on hard-to-reach sites. Therefore, a deep study and scientific substantiation of repair and restoration technologies is one of the main conditions for increasing the efficiency, safety and reliability of the human operator (repairman, restorer, technical and line workers, etc.) in the construction and technical sphere. It is important to take into account the reliability and safety of the human-machine system (HMS) when designing repair and restoration technologies, technical systems and devices for lifting and moving loads in cramped conditions on hard-to-reach sites. The article presents a system-structural method that allows us to consider a single human-machine system as a continuous series of simple human-machine systems that are formed and destroyed, and to divide a simple human-machine system into subsystems, subsystems into working methods, actions, micro-movements, etc.

Keywords: historical and cultural monuments, cultural heritage sites, systems method, systems-structural analysis, system, safety, cramped conditions

One of the important parameters of shaping historical and cultural monuments of the tower type are the dimensions in plan, the thickness of the external walls varying with height, and the angles of inclination of the external and internal sides of the external walls. The article defines the average values ​​of the angles of inclination of the external and internal sides of the walls of tower structures from the vertical using visual and instrumental methods using optical devices, plumb lines, and goniometers. A system of equations is compiled that determines the patterns of shaping cultural heritage monuments of the tower type. An example of calculating the geometric parameters of the designed tower based on the compiled dependencies is considered. The parameters of shaping tower structures must be taken into account when developing design documentation for repair and restoration work, as well as when drawing up process maps for the construction of destroyed or physically worn out wall structures.

Keywords: historical and cultural monuments, cultural heritage sites, shaping, repair, restoration, restoration, tilt angles, geometric parameters