What is steiner tunnel testing?

Steiner tunnel testing is a type of test used to evaluate the fire resistance of materials. It is an important test for building materials, such as insulation, plastics, and textiles. The test involves placing a specimen of the material in a tunnel and exposing it to a controlled flame for a specified period of time. The test measures different aspects of the material's fire resistance, such as flame spread rate, smoke density, and the rate of heat release. The results of the test can be used to determine the rating of the material's fire resistance. This information is critical for determining the safety and effectiveness of building materials in preventing the spread of fire.