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2. ASTM (2001) Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes-Specification A500–01. American Society for Testing and materials, West Conshohocken
3. American Petroleum Institute (API) (1991) “Recommended practice for planning, designing and constructing fixed offshore platforms”, API Recommended Practice 2A (RP 2A), Nineteenth Edition, August 1991. Washington, USA
4. AWS 2004, Structural Welding Code-Steel, ANSI/AWS D1.1-2004, American Welding Society, Miami, USA
5. Bian LC, Lim JK (2003) Fatigue strength and stress concentration factors of CHS-to-RHS T-Joints. J Constr Steel Res 59(5):561–663