How many TFIFRM thickness determinations are required for a W-shape column?

In the context of determining the thickness of thermal insulation fire-resistive materials (TFIFRM) on a W-shape column, the correct requirement is to conduct 24 thickness determinations. This is based on the industry standard practices that dictate a systematic approach to ensure the adequacy and uniformity of fireproofing application. Each measurement is critical to assess whether the thickness meets the necessary specifications to ensure the fire resistance rating of the structural element is achieved.

The process involves taking measurements at various points around the column to account for any variations and ensure compliance with design and safety codes. By conducting 24 determinations, the inspector can identify any inconsistencies in the application process and verify that the applied TFIFRM meets the required standards for fire resistance. Therefore, this systematic approach not only contributes to quality assurance but also aligns with best practices in fireproofing assessments.