What size specimens are used for a radiant panel flame test?

The radiant panel flame test is conducted to evaluate the fire performance of wall and ceiling materials, particularly in building environments. The specific size and positioning of the specimens are crucial for ensuring standardization and reproducibility of results.

In this case, the correct answer specifies that the specimens used are 6 inches by 18 inches positioned at a 30-degree angle. This size is appropriate for capturing the necessary data regarding how the material reacts to radiant heat. The dimensions allow for a suitable surface area to promote consistent heating and assess flame spread and burn characteristics effectively.

Positioning the specimens at a 30-degree angle is important as it mimics real-world conditions where surfaces may not be perfectly vertical or horizontal. Proper angling helps ensure that the heat distribution across the material is realistic, leading to more applicable results for fire safety evaluations. The combination of these dimensions and angles aligns with established testing protocols, making it the correct choice for conducting a radiant panel flame test.