The purpose of the work was to standardize the production of roof structures based on trusses maded of roll-welded RHS pipes. Serieses of trusses with 15-30 m span, 1,5, 1,8 and 2,1 m in height and with 2 different structural design types under the loads corresponding to the snow areas II – IV were examined. The work was commissioned by the company Ruukki, specialized in steel and steel construction. The load bearing capacity and weld strength calculations were made according to the Russian regulation SP16.13330.2011using SCAD and Microsoft Excel programs. The series with the resulting structural shapes were modelled in the program Tekla Structures. From the model the drawings of the trusses and the weight of the steel were obtained. The weight-length dependence was graphed and the inefficient elements of the series were excluded. As a result of this work a table for the selection of standardized-shape truss member’s profiles, a table for the determination of the standardized construction’s adjusted weight per unit of cover area and drawings of shipment-sized set of details were obtained. The results can be applied to make the production of trusses faster, cheaper and easier.