1. Specification for structural steel buildings;AISC,1988
2. Building code requirements for reinforced concrete with design applications;ACI 318-89,1989
3. Structural members and frames;Galambos,1968
4. Eurocode 3. Design of steel structures. Final draft. Brussels (Belgium): CEN; 2002
5. Part 2: Analysis of safety against buckling of linear members and frames;DIN 18800,1990