1. AASHTO. (1991). Guide specification for alternate load and resistance factor design procedures for steel beam bridges using braced compact sections American Association of State Highway and Transportation Officials Inc. Washington D.C.
2. AASHTO. (1998). LRFD bridge specification American Association of State Highway and Transportation Officials Inc. Washington D.C.
3. ABAQUS . (1999). ABAQUS theory manual Hibbitt Karlsson & Sorensen Inc. Pawtucket R.I.
4. AISC. (1999). Load and resistance factor design specification for structural steel buildings LRFD 3rd Ed. American Institute of Steel Construction Inc. Chicago.
5. American Society of Civil Engineers (ASCE). (1971). Plastic design in steel A guide and commentary American Society of Civil Engineers New York 80.