When can thickness tests for TFIFRM be conducted?

The correct response regarding the timing of thickness tests for Thermal Fireproofing Insulation for Reinforced Members (TFIFRM) is that these tests should be conducted after the TFIFRM has stabilized. This timing is crucial because thorough testing is necessary to ensure that the material has fully adhered and achieved the intended properties. Conducting the test before application or during application may yield inaccurate results, as the material would not yet have reached its final cured state and may not reflect its actual thickness or effectiveness. Hence, verifying thickness after stabilization allows inspectors to confirm compliance with specifications and ensure that the fireproofing has been applied correctly and is effective in providing the necessary fire-resistance rating.