Słowa kluczowe: DX51D, DX52D, DX53D, steel sheets, statistical research, stainless steel, physical and technological properties, EN 1993-1-4, mechanical properties, EN 1993-1-2, trapezoidal sheet, local transverse forces, local transverse resistance of the stiffened and unstiffened web, effective bearing length, residual stresses, material fatigue, Dang Van criterion, aluminum, reliability, consequence classes, structural classes, manufacturing classes, supervision level, inspection level, fatigue bearing strength, flexible connectors, variable loads, load cycles, shrinkage strain, renovation, adaptation, historic villa