In reinforced concrete structures, the minimum requirement for the thickness of the steel reinforcement protective layer has always been specified.
However, designers determine the thickness according to design standards, and construction and acceptance determine whether the thickness is qualified by applying the allowable deviation in the acceptance specifications based on the design values.
It seems that there is nothing wrong with this.
However, the “General Code for Concrete Structures” (GB 55008-2021) implemented on April 1, 2022, as a requirement that runs through the entire process, clearly states that “the survey, design, construction, acceptance, maintenance, curing, demolition and other construction activities of engineering construction projects must be strictly implemented throughout the entire process.
” The mandatory requirement for the thickness of the steel reinforcement protective layer is:.