Issue link: https://www.e-digitaleditions.com/i/1081695
60 I ICT TODAY assembly. Testing to European standards is somewhat similar to that of ASTM/UL, although the derived ratings are termed differently. However, the European standards evaluate only fire exposure and do not include a hose stream. This explains why European firestop systems often use mineral wool boards coated with a firestop spray or sealant; this approach is not acceptable under ASTM/UL as it cannot pass the hose stream test. L AND W RATINGS Unlike ASTM E814, EN 1366, or BS 476, the UL 1479 standard includes two test protocols, conducted at the option of the test sponsor, for evaluating air leakage (L Rating) and short-term water resistance (W Rating). The L Rating is used as an indication of smoke resistance. FM APPROVALS In some situations, particularly mechanical, electrical and plumbing (MEP) applications in industrial plants insured by FM Global, it is necessary to have FM approved firestop installations. This usually requires two types of documents: one showing that the manufacturer is subject to FM's quality inspection program and one proving that the firestop system is tested under UL/ASTM standards. WHEN THERE IS NO TEST There will be situations when a manufacturer has no test for a specific application. In such a case, an engineering judgment (EJ) is permitted under strict conditions defined by the International Firestop Council (IFC). The key to an EJ is that it must be issued by qualified personnel, usually a company engineer or a third-party engineering company, but never a sales person. It must also be based on credible testing. For example, issuing an EJ for a large plastic pipe based only on a test for small plastic pipe is not acceptable. THE UL MARK Products tested at UL provide a very important piece of quality assurance through the presence of what is called the UL Mark. That is the guarantee that the composition of the product the manufacturer sells is the same as what was tested. This is achieved through a series of unannounced and continuous inspections conducted by UL throughout a manufacturer's production facilities worldwide. Even the ISO certification does not provide such an independent assurance, and it is a requirement that the CE Mark in Europe is trying to emulate. Always contact the local authority having jurisdiction (AHJ).