JT/T 281-2007 Corrugated sheet steel beams for guardrail

JT/T 281-1995

GB/T 1231-1991 Specifications of high strength bolts with large hexagon head, large hexagon nuts, plain washers for steel structures GB/T 1231-2006 Specifications of high strength bolts with large hexagon head,large hexagon nuts,plain washers for steel structures GB/T 1231-2024 High strength bolts with large hexagon head assemblies for steel structures GB/T 18226-2000 Specification for steel components anticorrosion of highway traffic engineering appurtenances GB/T 18226-2015 Specification for steel component anticorrosion of highway engineering GB/T 228-2002 Metallic materials—Tensile testing at ambient temperature GB/T 228.1-2010 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 228.1-2021 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 228.2-2015 Metallic materials—Tensile testing—Part 2:Method of test at elevated temperature GB/T 228.3-2019 Metallic materials—Tensile testing—Part 3:Method of test at low temperature GB/T 228.4-2019 Metallic materials—Tensile testing—Part 4:Method of test in liquid helium GB/T 232-1999 Metallic materials—Bend test GB/T 232-2010 Metallic materials—Bend test GB/T 232-2024 Metallic materials—Bend testing method GB/T 3077-1999 Alloy structure steels GB/T 3077-2015 Alloy structure steels GB/T 470-1997 Zinc ingots GB/T 470-2008 Zinc ingots GB/T 6725-2002 Cold formed steel sections GB/T 6725-2008 Cold forming steel sections GB/T 6725-2017 General requirements of cold forming steel sections GB/T 699-1999 Quality carbon structural steels GB/T 699-2015 Quality carbon structure steels GB/T 700-1988 Carbon structural steels GB/T 700-2006 Carbon structural steels JT/T 495-2014 The sampling method for inspecting the quality of highway traffic safety facilities JT/T 495-2004 Sampling method and Judgement for highway safety appurtenances quality audit JTG/T D81-2006 Specificaion for Design of Highway Safety Facilities JTG/T D81-2017 Design Specifications for Highway Safety Facilities JT/T 495-2025 GB/T 18226-2025 Specification for steel component anticorrosion of highway traffic engineering