A filter rack plenum assembles with holding frames and eleven-gauge stiffener bars. The frames feature a two-inch wide flange on all four sides for service clearance, sealed and attached to the sheet metal wall. Connections are made using three-sixteenth-inch pop rivets or screws and nuts through frame holes and stiffener bars, with sealant applied between frames and stiffener bars. Four-and-a-half-inch wide stiffener bars are positioned between every other column of frames. The entire assembly rests above a concrete housekeeping pad provided by the general contractor.
11 ga. STIFFENER BAR PROVIDED BY ACCO CAULK BETWEEN FRAMES AND STIFFENER BAR HOLDING FRAME 3/16" POP RIVET OR 1-32X1/4" SCREW AND NUT THROUGH FRAME HOLES 3/16"X1/2" POP RIVET OR 10-32X7/16" SCREW AND NUT THROUGH FRAME AND STIFFENER BAR 2" WIDE FLANGE ALL AROUND FILTER RACK 4-1/2" WIDE STIFFENER BAR BETWEEN EVERY OTHER COLUMN OF FRAMES SEAL AND ATTACH FLANGE TO SHEETMETAL WALL 2'-0" x 2'-0" FILTER RACK (TYP.) 3/16" POP RIVET OR 1-32X1/4" SCREW AND NUT THROUGH FRAME HOLES 2" WIDE FLANGE ON ALL FOUR SIDES OF FILTER RACK FOR SERVICE CLEARANCE CONCRETE HOUSEKEEPING PAD BY G.C. PLENUM HOLDING FRAME STIFFENER BAR ATTACHMENT PER STRUCTURAL SUBMITTAL 4-1/2" 2" MIN LEVEL 1 FB-AH B1-1 Y Y Z Z SECTION Y-Y SECTION Z-Z
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