The rapid development of infrastructure contributes to the development of building technologies and materials. Today, in addition to classic building materials, completely new technological composites - pultruded profiles - have appeared. These materials have a lot of advantages compared to classic materials, but this product also has a huge drawback - unstudied. To date, there are no widely accepted design standards or instructions available to practicing design engineers.As a consequence, now, most construction projects rely on manufacturers' design manuals, which are often incomplete and too cautious. The purpose of this article is to develop provisions for the calculation of structures of pultruded profiles

Keywords: pultruded profiles, stretched elements, calculation of stretched elements

In this article we consider issues of structure designing of reinforced concrete rods with cirle cross-section. There are theoretical aspects of rod torsion in the article. We analyse actual codes and standards and found out that there is no any methods of rod calculation with circle cross-section. Methods of calculation are given in the article. Field tests of rod torsion were carried out. In article you can see main points of test, the procedure of test and results.

Keywords: rod torsion, rotational moment, roll, reinforced concrete, verification test in situ, designing of reinforced concrete rods, shear reinforcement