JT/T 457-2007 Three-beam guardrail for highway

JT/T 457-2001 Three-wave beam steel guardrail for highways

GB/T 10125-1997 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 10125-2012 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 10125-2021 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 1196-2002 Unalloyed aluminium ingots for remelting GB/T 1196-2008 Unalloyed aluminium ingots for remelting GB/T 1196-2017 Unalloyed aluminium ingots for remelting GB/T 1196-2023 Unalloyed aluminium ingots for remelting 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 1591-1994 High strength low alloy structural steels GB/T 1591-2008 High strength low alloy structural steels GB/T 1591-2018 High strength low alloy structural steels GB/T 18226-2000 Specification for steel components anticorrosion of highway traffic engineering appurtenances GB/T 2101-1989 General requirements of acceptance, packaging, marking and certification for section steel GB/T 2101-2008 General requirement of acceptance,packaging,marking,and certification for section steel GB/T 2101-2017 General requirement of acceptance,packaging,marking and certification for section steel GB/T 3098.1-2000 Mechanical properties of fasteners—Bolts, screws and studs GB/T 3098.1-2010 Mechanical properties of fasteners—Bolts,screws and studs GB/T 470-1997 Zinc ingots GB/T 470-2008 Zinc ingots GB/T 6728-2002 Cold formed steel hollow sections for general structure—Dimensions,shapes,weight and permissble deviations GB/T 6728-2017 Cold forming hollow sectional steel for general structure GB/T 700-1988 Carbon structural steels GB/T 700-2006 Carbon structural steels GB/T 90.1-2002 Fasteners—Acceptance inspection GB/T 90.1-2023 Fasteners—Acceptance inspection GB/T 90.2-2002 Fasteners—Marking and packaging GB/T 90.3-2010 Fasteners—Quality assurance system JT/T 281-2007 Corrugated sheet steel beams for guardrail 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 6728-2025 Cold forming sectional steel for general structure