1. 1) Railway Technical Research Institute, "Design Standard for Railway Structures and Commentary (Steel and Composite Structures)," 2009 (in Japanese).
2. 2) Japanese Standard Association, JIS G 3114 "Hotrolled atmospheric corrosion resisting steels for welded structure," 2008.
3. 3) Railway Technical Research Institute, "Guideline for design and fabrication of unpainted steel railway bridges," 1994 (in Japanese).
4. 4) Miki, C., Ichikawa, A. et al., "Proposal for Weathering Alloy Index and Accelerated Corrosion Test Method to Select Weathering Steels," Doboku Gakkai Ronbunshuu, No.738/I-64, pp.271-281, 2003 (in Japanese).
5. 5) Japanese Society of Steel Construction, "Possibility and new technologies of weathering steel," 2006 (in Japanese).