1. EUROCODE EN 1990 basis of structural design 2005
2. Canadian highway bridge design code CAN/CSA-S6-06
3. American Association of State Highway and Transportation Officials (AASHTO) LRFD bridge design specifications 2007
4. American Association of State Highway and Transportation Officials (AASHTO) LRFD bridge design specifications 2010
5. American Association of State Highway and Transportation Officials (AASHTO) LRFD bridge design specifications 2012