An internally isolated supply fan array mounts on neoprene pads and mounting brackets set atop a concrete pad provided by the general contractor. The assembly incorporates inlet and discharge attenuators, factory-provided back draft dampers, and a sheetmetal panel wall sealed against the fan casing. A ninety-two by two hundred fifty-four inch minimum opening in the concrete slab accommodates the duct shaft, with surrounding sheetmetal work provided by ACCO. Unit attachment is executed per the structural submittal.
CONCRETE PAD BY G.C, AS SHOWN ON PLANS SHEETMETAL PANEL WALL BY ACCO AS SHOWN ON PLANS. 6.0" PRESSURE CLASS. SEE DETAIL 19 / M1.5.02 INTERNALLY ISOLATED SUPPLY FANS (TYP.) SEAL SHEETMETAL WALL AGAINST FAN CASING FACTORY PROVIDED BACK DRAFT DAMPER (TYP.) UNIT ATTACHMENT PER STRUCTURAL SUBMITTAL SHEETMETAL AROUND DUCT IN SHAFT OPENING BY ACCO 92"X254" MIN OPENING IN SLAB BY G.C. BRACKETS TO SECURE FANS DISCHARGE ATTENUATOR INLET ATTENUATOR MOUNTING BRACKET AND NEOPRENE PADS 12'-3" SF-AH B1-1 BASEMENT 84"X246" SA UP TO LEVEL 1 84"X246" SA
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