Inspection frequency

Since the domestic CNS specification does not specify the inspection frequency of the welded steel wire mesh, the current domestic inspection frequency for the welded steel wire mesh still follows the American ASTM-490b stipulation. The wire rod before welding is subjected to a tensile test every 20 tons, and the finished steel The net is subjected to a tensile test every 6968 square meters, and a shear test every 27870 square meters. The test sample is cut from a large test piece of equal width from the finished product; the sampling method is as follows