GB/T 31447-2015 Pre-galvanized highway guardrail

GB/T 26941.1-2011 Fences—Part 1:General rules 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 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 700-1988 Carbon structural steels GB/T 700-2006 Carbon structural steels 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 1839-2003 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products GB/T 1839-2008 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products 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 22040-2008 Technical requirements and determination of weathering quality for plastics of highway furnatures GB/T 24514-2009 Zinc and/or aluminium based coatings on steel—Determination of coating mass per unit area and chemical composition—Gravimetry,inductively coupled plasma atomic emission spectrometry and flame atomic absorption spectrometry GB/T 31439.1-2015 Corrugated sheet steel beams for road guardrail—Part 1:W-beam guardrail GB/T 31439.2-2015 Corrugated sheet steel beams for road guardrail—Part 2:Thrie-beam gurdrail 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 JT/T 495-2025 Sampling Method for Quality Inspection of Highway Traffic Safety Facilities Products GB/T 22040-2025 Technical requirements and test of weathering quality for plastics of highway furnatures GB/T 1839-2025 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products GB/T 31439.1-2025 Corrugated sheet steel beams for road guardrail—Part 1:W-beam guardrail GB/T 31439.2-2025 Corrugated sheet steel beams for road guardrail—Part 2:Thrie-beam guardrail