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i � � � i � � I � l.O 1NTRODUCTION The purpose of these test methods are to determine the relative burning behavior according to the , standards, ASTM E84 and NFPA 701, of materials, by observing the flame spread along the specimen. However,there is not necessarily a relationship between these two measurements. Test specimens for the ASTM E84 are conditioned as appropriate in an atmosphere maintained between 68 and 78 °F and 45 to 55% relative humidity. Immediately prior to the test, the specimen is mounted in the furnace with the side to be tested facing the test flame. Cement board is placed on the unexposed side of the specimen to protect the furnace lid assembly. Sometimes, because of the nature of the material undergoing testing, additiona] support(e.g, wire, wire and rods, rods, and/or bars) is used to ensure that the specimen will remain in position during the test. The use of supporting materials on the underside of the test specimen may lower the Flame Spread Index from that which might be obtained if the specimen could be tested without such support, and the test results do not necessarily relate to indices obtained by testing materials without such support. Two model. building codes (2015 International Building Code�, Chapter S Interior Finishes, Section 803 Wall and Ceiling Finishes;NFPA 5000,Chapter I 0 Inlerior Finish,Section 10.3 Interior Wall or Ceiling Finish Testing and Classrfrcation) classify materials based on the Flame Spread and Smoke Developed indices. Test specimens for the NFPA 701,Method 2, shall be conditioned in an oven at a temperature of 105 �C f 3 °C for not less than 1 h, and no more than 3 h before testing unless otherwise specified by the standard.Each specimen is mounted on the support hanger in the test cabinet.The bumer is placed 100 mm (3.94 in.) away from the specimen with the center axis of the burner at a 25-degree angle in line with the bottom of the center of the specimen,and is maintained for a 120 s exposure time. The afterflame time of the specimen (time of burning of the specimen after the gas flow is tumed offl and the time of burning of material that falls to the bottom of the chamber shall be measured and recorded. These standards should be used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions and should not be used to describe or appraise the fire-hazard or fire-risk of materials,products,or assemblies under actual fire conditions. However,results of the test may be used as elements of a fire-hazard assessment or a fire-risk assessmenYwhich takes into account all of the factors which are pertinent to an assessment of the fire hazard or fire risk of a particular end use. The results apply specifically to the specimens tested, in the manner tested, and not to the entire production of these or similar materials, nor to the performance when used in combination with other ' � materials. More detailed results with graphical illustrations may be found in Appendix A for the ' ASTM E84 and in Appendix B for the NFPA 701. � Apollo Sunguard Systems � SwRI Project No..01.20689.1531] � i i � i