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Can cold-drawn and hot-rolled steel bars be used in prestressed concrete, and under what circumstances can they be used?
Cold-drawn and hot-rolled steel bars cannot be used in prestressed concrete. Too many cold-drawn hot-rolled steel bars are "slimming steel bars", and now people all over the country are criticizing them. Cold-rolled ribbed steel bars (GB 13788-2008), steel wires for prestressed concrete (GB/T 5223-2002), steel bars for prestressed concrete (GB/T 5223.3-2005) and steel strands for prestressed concrete (GB/T 5224-2003) can be used for prestressed concrete.
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