This thesis work was made for Ruukki Rus, for the Russian filial of the big Finnish company. Ruukki Rus makes projects and produce different steel structures. However, there was a task to reduce the time spending to design process. As standardization and unification of elements, constructions and design solutions is one of the main ways to reduce the complexity and cost of the construction, there was decided to standardize structures in typical building. The purpose of this work was to make a standardized series of the roofing truss designs with 10 % slope for 24, 30, 36 meters spans and different load combinations. Calculations were made in SCAD Office, in Microsoft Excel and some simple calculations were made by hands. All calculations (determination of the load bearing capacity and welded connections strength) were made according to the Russian code SP16.13330.2011 «Steel Structures». On this calculations basis BIM models in Tekla Structures were made. The metal consumption and all the standard sections drawings were received from those BIM models. Designed series of truss structures with a 10% slope and 24, 30, 36 meters spans covers a range of line loads from 1.3 t/m to 3.3 t/m. In comparison with the truss structures series Molodechno it has a lower metal consumption by reducing the cross section of the upper chords due to vertical elements adding. The result of this thesis work is a table for customers where they can choose type of roofing structures they need and estimate the approximate weight and cost, and almost the same table for designers – to consult customers and to make some structure decisions according to customer needs. Therefore, this series reduce the time spending from the moment of the concept project to the moment of manufacturing because the time of designing is much less.