We require steel columns with composite I-beam sections (1000x30 x 600x16) made of C355/Q255 steel. Each column must be 18.25 meters in length with approximate weight of 10.373 tons. Fire protection area required is 99.4 m2. Specifications include base plate 40mm, cap plate 30mm, and all ribs 16mm.  

Total procurement quantity is 3,000 tons. Manufacturer must specify production timeline and delivery schedule to Blagoveshchensk, Amur Region. Priority given to suppliers with successful project references in the Russian Federation.  

Project completion is scheduled for 2026. Please provide technical specifications and commercial terms aligned with these requirements.