Installation of steel structure of a 5-span reinforced concrete bridge with a total length of 186 m and the individual spans of 33 + 3×40 + 33 m. The supporting structure consists of a continuous steel-concrete grid made of full-wall welded I-beams of different height from 1 485 to 1 540 mm. The steel structure is laid out in a directional arc with a radius of R = 2.550 m, which follows the R1 route as faithfully as possible. During construction, some specific problems were solved, for example, temporary placing of the structure on the supports to eliminate its sinking or ensuring the quality of assembly welds in adverse climatic conditions by using the so-called welding cabin.
