Lateral buckling of steel beams. Compared analysis of CTE DB SE-A, EAE and EC3 codes

The Basic Document, Structural Safety, Steel of the Spanish Technical Building Code provides mathematical expressions to obtain lateral buckling resistance hot-rolled steel beams. These include a coefficient, {\displaystyle C_{1}}, that accounts for variation bending moment along beam. However, this document only values linear diagrams moments. instruction Steel, copy latest version Eurocode 3, does not any method elastic critical moment. On contrary, table with correction factors applicable different types moments is included. In both procedures have been combined and results compared those obtained using other versions 3. Finally, tables provided ease design beams while preventing buckling.