The percentage error for compression testing machines shall not exceed what percentage?

The percentage error for compression testing machines should not exceed 1%. This standard is critical because compression testing is essential for determining the compressive strength of concrete, which directly affects the safety and integrity of structures. Accuracy in testing ensures that the materials used in construction meet specified criteria, are reliable, and perform as designed.

A maximum error of 1% allows for a precise measurement that minimizes the risk of misinterpretation of concrete strength, thus ensuring compliance with building codes and standards. Higher tolerance levels, such as 2% or 5%, could lead to significant discrepancies in strength assessment, which could compromise structural safety. Therefore, maintaining a threshold of 1% is vital for upholding quality control in concrete testing processes.