The following article deals with the survey techniques of sustainability properties of metal structures by destructive and non-destructive methods.

Keywords: "examination, strength, diagnosis, mechanical properties, nondestructive testing, pipe sheet pile design "

The questions connected with an assessment of mechanical characteristics of steel elements of designs of tribunes of Torpedo stadium in Taganrog are considered. The analysis of the strength characteristics of metal of columns received by a nondestructive method, beams, the top and bottom belts of farms and раскосов is provided. Results of processing of values of mechanical characteristics on compliance most are shown to the general law of distribution of Veybull. For values of a limit of fluidity and strength scale and form parameters, and also shift which defines critical bottom possible value of the mechanical characteristic of theoretical distribution are received. The analysis of accessory of metal of the surveyed elements to the corresponding class of durability of construction steel with the conclusion that all metal of the surveyed elements has a class durabilities not lower than C 255 that meets requirements imposed by the project to durability of metal is given.

Keywords: nondestructive control, mechanical characteristics, durability, diagnostics, class of durability, metal test

Results of research of fixture of a wooden design of the river mooring in Rostov-on-Don, being in operation within more than 150 years are presented. As the fixture was possible to be taken from a design in a single copy, it wasn't represented possible to apply destroying test methods. Therefore mechanical characteristics of metal were measured by means of system of nondestructive control "Durability", developed at the Rostov state construction university and a portable tverdomer with ultrasonic and dynamic sensors. Approximate compliance of strength characteristics of studied metal, allegedly krichny iron is established, to characteristics let out now staly. Approximately on a fluidity limit studied metal corresponds to a limit of fluidity of St3 steel. The short analysis of loss of the area of live section of fixture and the forecast of possible further operation of a design in the assumption is made that conditions of this operation won't change.

Keywords: non-destructive testing, mechanical properties, strength, diagnostics, a priori information, test the metal

Considered the questions connected with estimation of mechanical properties of steel elements of metal construction. The measurements are performed in a non-destructive method on the basis of the analysis of the characteristics of the implementation of the conical indenter in surface materials. This method allows you to get the values of all mechanical characteristics of metal. The measurement of mechanical characteristics can be made to anywhere in the design. At the same time, when large amounts of construction and large volumes of measuring works, you need to evaluate a sufficient number of measurements in a particular place. Proposed and implemented the Bayesian method of consideration of a priori information to reduce the number of dimensions and complexity of the process of receiving mechanical characteristics.

Keywords: nondestructive control, mechanical characteristics, durability, diagnostics, aprioristic information, metal tests.