The assembly features a backdraft damper anchored to a steel embed plate cast into a tilt-wall pilaster. A two-by-three-inch steel angle is welded to the embed plate to provide a mounting surface. A two-by-two-inch steel angle is attached at the top and bottom to a horizontal two-by-two-inch hollow structural section member, which spans between vertical hollow structural section supports and the tilt-wall jamb. A three-inch clear bird screen is anchored to the steel angle framing at the edges using security fasteners. The backdraft damper is secured to the embedded steel using mechanical fasteners per the manufacturer's specifications.
2X3 ANGLE WELDED TO EMBED, RE: STRUC SCHEDULED BACKDRAFT DAMPER. ANCHOR TO EMBEDDED STEEL. REF: MECH DWGS MECHANICAL FASTENER PER MANUF. TILT-WALL PILASTER 4" 8 1/2" 2X2 STL ANGLE, ATTACHED AT TOP AND BOTTOM TO HORIZONTAL HSS. RE: STRUC CLEAR 3" BIRD SCREEN ANCHORED TO STEELL ANGLE FRAMING AT EDGES WITH SECURITY FASTENERS. STEEL EMBED, RE: STRUC 2X2 HSS HORIZONTAL MEMBER BETWEEN VERTICAL HSS SUPPORTS AND TILT WALL AT JAMB. AS REQUIRED FOR ATTACHMENT FOR MAX BIRD SCREEN SIZE. RE: STRUC FOR ATTACHMENT
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