What are the technical requirements for precast supports and hangers?
The main components and connecting components should be made of carbon steel or stainless steel of Q235B grade or above.
The quality of carbon steel should comply with the relevant provisions of the current national standard “Carbon Structural Steel” GB/T700, and the quality of stainless steel should comply with the relevant provisions of the current national standard “Stainless Steel and Heat resistant Steel Grades and Chemical Composition” GB/T 20878.
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