The relevant construction skills and quality inspection standards are implemented by China Lucky Steel Manufacturer in accordance with the relevant rules:

"Highway Bridge and Culvert Construction Skills Standard" (JTJ041-2000)

GB/T709-1998GB

T1231-1991

JT/T281-1995

"Metal Corrugated Plate Culvert Device Operation Standard" and "Highway Engineering Skill Standard" (JTG B01-2003).