Which statement about field-applied fireproofing is true?

• A. It uses a different material than factory-applied.
• B. It is installed on site.
• C. It is installed at the factory.
• D. It requires no QA/QC.

Answer: (B)

Field-applied fireproofing is applied on the actual construction site after the structure is erected, using methods like spray or hand application to reach the required thickness. This on-site installation is what distinguishes it from factory-applied fireproofing, which is applied in a controlled shop environment before delivery. Because it happens in the field, crews must manage site conditions, surface preparation, and access, and a robust QA/QC process is essential to verify that the coating thickness, coverage, adhesion, and curing meet the spec. The statement about installation on site is the correct one, while the idea that it’s installed at the factory or that it always uses a different material from factory-applied, or that QA/QC isn’t needed, are not accurate universal truths.