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INTRODUCTION: This report is a presentation of results of the tunnel test on a material submitted for testing by Faswall Concrete Systems of Augusta, Georgia. The test was conducted in accordance with the American Society forTesting and Materials Standard Test Method for "Surface Burning Characteristics of Building Materials," E 84-89a, also known as the Steiner Tunnel Test. This method is similar to ANSI 2.5, NFPA No. 255, UBC No. 42-1, and UL No. 723. This method has been approved for use by agencies of the Department of Defense and for listing in the DoD Index of Specifications and Standards. This standard should be used to measure and describe the properties of materials in response to heat and flame under controlled laboratory conditions. It should not be used for the description, appraisal, or regulation of the fire hazard or fire risk of materials, products, or assemblies under actual fire conditions. There are no considerations made for results that may be obtained if the material being evaluated were tested in combination with other materials. The test method does not provide fox the measurement of heat transmission through the surface tested, the effect of aggravated flame spread behavior of an assembly resulting from the proximity of combustible walls and ceilings, or classifying or defining a material as noncombustible solely by means of a flame spread index. However, results of this test may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use. The fire performance of any material in the light of present knowledge cannot be evaluated on the basis of any one test. The test result presented here applies only to the specimen tested and is not necessarily indicative of apparent identical or similar materials. All test data are on file and are available for review by authorized persons. PURPOSE: The purpose of the tunnel test method is to determine the relative burning behavior of the material by observing the flame spread along the surface of the specimen. It is intended to provide only comparative measurements of surface flame spread and smoke density measurements of building materials with that of select grade red oak flooring and inorganic reinforced cement board surfaces under specific fire exposure conditions. The test exposes a nominal twenty-four feet long by eighteen inches wide specimen to a controlled air flow and flaming fire exposure adjusted to spread the flame along the entire length of the select grade red oak flooring specimen in 5.50 minutes during a 10-minute test duration while flamespread over its surface and density of the resulting smoke are measured and recorded. Test 4\"Lt.•0 COMMERCIAL TESTIIIO COMPAIIY •)