The article presents the technical and economic indicators previously proposed solutions truss reinforced concrete beams with combined prestressing. Reducing consumption of concrete and steel in comparison with typical. This reduces the weight of the beams and money. Significant economic effect is achieved by the use of roof beams t profile with a shelf in the stretched area. This effect is achieved due to a significant reduction of the structural height of the coating (beams and slabs). By reducing the volume of the brick walls of the building, which is based on the overlap, the cost of masonry with single-span building, as noted above, reduced by 33% in comparison with a standard solution.

Keywords: truss reinforced concrete beam, combo-prestressing of prestressed reinforcement

The article proposes an analytical description of the deformation diagrams of concrete and pre-stressed high-strength reinforcing steel used for development of calculation methods of reinforced concrete elements with combined prestressing. In the developed method of calculation is the rectangular stress distribution in the compressed area of the flexible reinforced concrete element is adopted actual curved that in the case where the relative height of the compressed zone of the cross section close to the boundary ξ ξR, significantly clarifies the calculation. With this purpose, the curve σв – EV, obtained at a Central compression of the concrete prisms.

Keywords: stress-strain diagram of concrete, stress-strain diagram of steel

In our work we researched the possibility of producing active chlorine out of fresh natural water through it's direct elecrolysis. We discovered how the anode's corrosion resistanse relates to the ruthenium oxide and iridium oxide ratio in the anode's coating. We also researched their properties: chlorine outcom dependance on current, cell voltage, and active chlorine concentration increase dynamics in processed water from Don river.

Keywords: Emergencies, water supply, disinfection, electrolysis of natural water, chlorides, active chlorine, current density, electrode's lifetime

This article describes the issues of water management in the south of Russia. Submitted by the need to implement new permanent monitoring systems for long-exploited water bearing structures. Currently, more than 80% of water conveyance structures in the south of Russia have worked much your standard service life. At the same time there is a simultaneous increase in the load on the aging waterworks, in the absence of the necessary qualified staff and technical repair base will inevitably lead to an increase in the number of accidents due to operational reasons. Existing methods of inspection of hydraulic structures aimed at assessing the overall suitability of facilities supporting structures for further use. During the irrigation channels trough surveys, a number of questions to identify the nature of damage and defects, as well as forecasting of technical condition for a certain period of time. Therefore there was a need for a method for screening and prediction of technical state of gutter channels of irrigation systems. Monitoring is carried out taking into account the existing regulations for the design, construction and operation of the specifics, as it highlights the basic requirements for carrying out the process of the technical state of constructions using modern measurement instruments for nondestructive monitoring.

Keywords: monitoring, water-conducting structures, the residual resource, water management, reliability parameters, technical condition

This article focuses on the basic materials and finished products, traditionally used for the device translucent roofs. are those materials, which are more in demand in today's market of translucent coatings on the basis of the analysis of domestic and foreign sources. Identifies the main characteristics of materials, advantages and disadvantages, depending on the method of producing glass, are the main features of the classification of laminated glass. The article will be a logical extension, which will be considered innovative materials for the device translucent roofs of sports facilities.

Keywords: Glass polished, reinforced, toughened, laminated, types of laminated glass, glass block feature

The article analyzes the calculation of the punching shear slab structures according to the recommendations of SNiP 2.03.01-84*concrete and reinforced Concrete structures. It is shown that the existing method of calculation gives overestimated the bearing capacity of floor slabs in bezrigelny frame systems. In order to establish the bearing capacity corresponding to the constructive decision is expected by calculation to determine the angle of the pyramid pushing.

Keywords: extrusion, dowel effect, bezrigelny frame, preopera area, bearing capacity, punching the pyramid, technological hole, slab, reliability, rebar, concrete

The paper analyzed the influence of the shape and projection of its location on the surface of the heat sink on the heat source temperature. Based on the theoretical analysis, it was shown that the pins, ribs, hinges, and other projections are present on the surface of the heat sink, it does not increase the cooling surface and heat-loaded lower temperature source. These designs provide only near the side surfaces of the rapidly decreasing dipole, quadrupole, and other components of the field, which are not conducive to heat dissipation from the source, and create a circulating flow.

Keywords: radiator protrusion shape, thermal conductivity, thermal apparatus mode, the temperature of the heat source