Superior Block Corporation
761 East 42nd Street • Brooklyn, New York 11210 • Tel 718.859.8734

UL & Fire Rating

Due to its non-combustible properties, we look to Concrete Masonry Units (CMU) as a fire barrier. Our block are Underwriter’s Laboratory Approved. A U.L. rating can be considered a validation system, assuring that each fire rated unit performs to the Architect’s and Engineer’s specification. Superior is approved to produce units bearing the following U.L. designations: U901, U904, U905 and U906.

Our block also comply with Fire Resistance Rating of Concrete Masonry Assemblies. For additional information visit and reference TEK 7-1C.