What is the minimum required number of TFIFRM gauge thickness accuracy checks during an inspection shift?

The minimum required number of TFIFRM gauge thickness accuracy checks during an inspection shift is three. This requirement is established to ensure that the thickness readings taken by the TFIFRM gauge reflect accurate measurements within the tolerance levels set by industry standards. Consistent accuracy checks are critical for maintaining the integrity of fireproofing applications, as even minor discrepancies can have significant implications for fire resistance performance.

By conducting at least three checks, inspectors can account for variations that may occur due to different factors such as equipment calibration, environmental conditions, or application techniques. This practice promotes a thorough inspection process, enhancing the reliability of the fireproofing system and ensuring compliance with quality control standards in construction. Regularly validating the gauge's performance through multiple checks throughout an inspection shift helps maintain high safety standards and prevents potential fire hazards due to inadequately coated surfaces.