SECTION 15820 - DUCT ACCESSORIES
Roll-Formed Steel Blades: 0.064-inch- thick, galvanized sheet steel. Blade Axles: Galvanized steel. Bearings: Oil-impregnated bronze . Tie Bars and Brackets: Galvanized steel. Jackshaft: 1-inch- diameter, galvanized-steel pipe rotating within pipe-bearing assembly mounted on supports at each mullion and at each end of multiple-damper assemblies. ................
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