When should a drill bit be used for inspection?

The use of a drill bit for inspection is particularly relevant when dealing with high-density Spray-Applied Fire-Resistive Material (SFRM). This is because high-density materials typically require more rigorous testing methods to assess their integrity and fire-resistive capabilities.

When inspecting high-density SFRM, a drill bit can effectively provide samples of the material, allowing for a deeper examination of its thickness and overall condition. This process helps identify any potential issues such as moisture penetration or deterioration that may not be evident through surface inspection alone. High-density SFRMs are often used in demanding environments where fire resistance is crucial, making thorough inspection vital for safety compliance.

In contrast, low-density and medium-density SFRMs may not necessitate as intensive an inspection method, as they can often be evaluated using visual assessments or less invasive techniques. While issues can still arise with these materials, the likelihood and consequences of such issues might be less severe, thus influencing the choice of inspection methods. Surface moisture inspections typically do not require the use of a drill bit, focusing instead on evaluating surface conditions without penetrating the material.