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Until 2017, there were no regulatory documents in Russia that allowed calculations of light steel thin-walled structures (LSTWSs), which hampered their use in construction. The paper compares various methods of calculating LSTWSs in compliance with Russian, European and American standards, and describes their features. The direct method of finding the strength of steel thin-walled profiles, developed by American scientists B. Schafer and T. Pekoz, is described. The method is based on the determination of the bearing capacity of a section according to the results of calculating critical forces for three forms of buckling. Using the CUFSM program developed by B. Schafer on the basis of the finite strip method, a centrally compressed strut from LSTWS was calculated; critical forces of three forms of buckling were determined, and profile bearing capacity was determined as the minimum value of three.

Determination of bearing capacity of steel thinwalled cold-formed structures using the example of centrally compressed struts