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Technical Data Gamma Pads Rooftop Supports Concrete Inserts Beta Clamps & Z-Clamps Loop & Ring Clamps Spring Steel Electrical Fittings Pipe & Conduit Supports General Fittings Channel Nuts & Hardware Channel IntroductionZSi-Foster Engineering Catalog – 229 –WARNING: These products can expose you to chemicals including lead, which is known to the State of California to cause cancer, and which is known to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.Cush-A-Block® Rooftop SupportsStandard Finish: Pre-galvanized (PG) or Hot Dipped Galvanized (HG)CBN SeriesPlain BaseCBN-BR Bridge SeriesSupport With Channel4-3⁄16\106mm10-1⁄2\267mm5\127mm7-3⁄8\187mm10\254mmWWW.ZSI-FOSTER.COMThe CBN-Base Rooftop Support is UV resistant and suitable for installation on most types of roofing material or other flat surfaces. Can be used as a curb (sleeper) replacement. Screw fasteners can be used to attach one or two hole pipe straps or a piece of strut (not included).Note: The embedded fasteners are conveniently spacedto allow attachment of slotted channel.CBN-Base SeriesPart No. Uniform Load Capacity Lbs (kN)*CBN 2,500 * (11.12 kN)* This load is only for the capacity of the components in this assembly. Please consult roofing manufacturer or engineer for roof load capacity.Like all of the Cush-A-Block supports, the CBN-BR Bridge Rooftop Supports are perfect for supporting natural gas and refrigeration piping systems, cable tray, electrical conduit, multiple lines, HVAC equipment and many other applications. The CBN-BR Series provides a longer mounting surface with strut lengths up to 60\Standard strut mount pipe clamps are used to secure the pipes.StrutLength5-5⁄8\143mm5\127mmTotalLengthTotalLengthStrutLength = + 1⁄2\( ) ( ) ( ) 13mmWWW.ZSI-FOSTER.COMWWW.ZSI-FOSTER.COMCBN-BR Bridge Series Supports with 1-5⁄8\Part No. StrutLengthTotalLengthUniform Load Lbs (kN)*CBN28BR 28\28-1⁄ 2\1,491* (6.63 kN)CBN36BR 36\36-1⁄ 2\1,160* (5.15 kN)CBN42BR 42\42-1⁄ 2\994* (4.42 kN)CBN50BR 50\50-1⁄ 2\835* (3.71 kN)CBN60BR 60\60-1⁄ 2\696* (3.09 kN)* This load is only for the capacity of the components in this assembly. Please consult roofing manufacturer or engineer for roof load capacity.