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Technical Data - Fire Rated Assembly - US KCLK.GuideInfo Plastic spacer or expansion strip for installation of up to 3-7/8 in. (98 mm) thick glass block rated up to and including 1-1/2 hrs. [Glass Blocks Certified for the U.S.A] Glass Block Installation Materials Certified for the U.S.A Glass block installation materials are Classified from a 3/4, 1 or 1-1/2 hr fire exposure and are intended for installation with Classified Glass Blocks (KCJU). For Classifications of Fire Resistant Glazing Material (CCET) used in the construction of interior fire resistance rated walls and partitions see the Fire Resistance Directory (BXUV). Glass blocks and glass block installation materials are designed for the protection of openings in masonry walls, unless otherwise noted in the individual Classification, against fire, when installed in accordance with the National Fire Protection Association Standard for Fire Doors and Windows, NFPA 80, and as specified in the individual Classification. Authorities Having Jurisdiction should be consulted before installation. The basic standard used to investigate products in this category is UL 9, "Fire Tests of Window Assemblies" Those products which have also been Classified in accordance with Uniform Building Code standard 7-4, "Fire Test of Window Assemblies," (1997) are noted in the individual Listings. LOOK FOR CLASSIFICATION MARKING ON PRODUCT The Classification Marking of Underwriters Laboratories Inc. (shown below) on the product or carton is the only method provided by Underwriters Laboratories Inc. to identify products produced under its Classification and Follow-Up Service. GLASS BLOCK INSTALLATION MATERIAL Those products noted in the individual Listings, which have been Classified in accordance with Uniform Building Code standard 7-4, "Fire Test of Window Assemblies," (1997) may bear the additional reference, "Also Classified in accordance with Uniform Building Code standard 7-2, "Fire Test of Window Assemblies," (1997)."
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