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Tech Brief <br />Class A Fire Rating <br />Background <br />All roofing products are tested and <br />classified for their ability to resist fire. <br />Recently, these fire resistance standards <br />were expanded to include solar equipment <br />as part of the roof system. Specifically, this <br />requires the modules, mounting hardware <br />and roof covering to be tested together as <br />a system to ensure they achieve the same <br />fire rating as the original roof covering. <br />Adoption of these new requirements will <br />begin in California in 2015 and extend to <br />the rest of the country in 2016. <br />IronRidge Certification <br />In August 2014, IronRidge was the first <br />company to receive a Class A Fire Rating— <br />the highest possible rating—from Intertek <br />Group plc., a Nationally Recognized Testing <br />Laboratory. <br />IronRidge Roof Mount products were tested <br />on flat and sloped roofs in accordance with <br />the new UL 1703 & UL 2703 test standards. <br />The testing evaluated the system’s ability to <br />resist flame spread, burning material and <br />structural damage to the roof. <br />Refer to the table below to determine the <br />requirements for achieving a Class A Fire <br />Rating on your next project. <br />Test Setup <br />Solar Modules <br />Solar modules are given a Type <br />classification based on their <br />materials and construction. <br />Mounting System <br />Mounting is tested as part of a <br />system that includes type-tested <br />modules and fire-rated roof covering. <br />Roof Covering <br />Roof covering products are given a <br />Fire Class Rating of A, B or C based <br />on their tested fire resistance. <br />A burning wooden block is placed on module as a fan blows at 12 mph. <br />Flame cannot be seen on underside of roof within 90 minutes. <br />Burning Brand Test <br />Flame at southern edge of roof is aimed up the roof as a fan blows at 12 <br />mph. The flame cannot spread 6 feet or more in 10 minutes. <br />Spread of Flame Test <br />Fire Testing Process <br />Roof Slope Mount Module Fire Rating* <br />Steep Slope <br /> (≥ 9.5 degrees) <br /> Flush Type 1, 2, & 3 Class A <br />Tilt Type 1 & 2 Class A <br />Low Slope <br />(< 9.5 degrees) <br /> Flush Type 1, 2, & 3 Class A <br /> Tilt Type 1, 2, & 3 Class A <br />*Class A rated PV systems can be installed on Class A, B, and C roofs. <br />2334 N Westwood <br />Ave11/14/22