The variety advantages of composite structures compared to steel and con-crete enough convincing and well-known in the world of construction. An important aspect of this system is that due to force and formative joints of steel structures and reinforced concrete, there is a brand new design, optimum usage of the concrete advantages in a concise and steel structure in the tension zone. The work carried out tests strength of composite samples with different types of valves: the cable and rod. A comparative analysis, conclusions are drawn about the choice of a particular valve, and the feasibility of its usage in general. The results should be interesting for industrial organizations involved in the construction of large bridges and construction of modern high-rise buildings.