1, check the appearance quality of reinforcement, such as whether there is old rust, peeling, rust pit, oil stain, etc. Check whether the steel bar diameter meets the requirements with vernier caliper. Check the steel certificate, quality guarantee, retest report, etc. Check whether the nameplate (iron) content of reinforcement is consistent with the quality guarantee.
2. Take samples under the supervision of the supervisor or the owner (now some testing centers have to test the theoretical weight of steel bars).
3. Pay special attention to the seismic reinforcement, which has an E on it. Now most of the projects outside are earthquake-resistant. This is a mandatory requirement.