The process of forming new technological methods of construction of buildings and structures, a high degree of industrialization of construction and unification of elements, lead to the study of various principles of forming the spatial structure of the object from flat scans. The authors consider a new transformable architectural and structural system consisting of rod spatial arches, the main elements of the developed system are rods and hinges that connect them at the ends. The latter are made as an analog of bionic mobile communication. Analysis of the transformation of a rod spatial element into an arch of various shapes is performed by the following methods: traverses, jacks, pneumatic structures and automatic methods. As a result, you can use rod arches to create buildings and structures of various shapes. In the end, the versatility of such spaces allows buildings and structures based on rod spatial arches to be multifunctional. Specifically for the arches of the NPI series, the authors developed a hinge Assembly designed to connect the rods of a fast-erecting light spatial structure of a regular structure. Research has shown that on the basis of the resulting arched strezhnevoy system, it is possible to form spaces close to the cylindrical and spherical shape. The variability of forms based on a single set of structures, low-labor-intensive installation process using the principles of self-construction, create prerequisites for new research in the field of improving this type of transformable architectural and structural systems. These issues provide a wide range of tools for solving architectural, structural and technological factors of shaping, which contributes to the development of creative activity.

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In the article the peculiarities of construction of the system of internal audit in the economic business security. The authors formulate the tasks of internal audit as an effective service of the company, providing management and owners with timely, objective information about the state of its Affairs. The basic procedures of internal audit in ensuring economic security of business necessary for the efficiency of protection mechanisms are proposed.