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TAMCO Installation Guidelines for medium-duty backdraft dampers

STRUCTURAL SUPPORT REQUIREMENTS:

  • Field-supplied, intermediate structural support is required to resist applied velocity and pressure loads for backdraft dampers that are two or more sections high or wide.
  • Angle bracing installed at multi-section joints will prevent bowing and twisting of backdraft damper units.
  • TAMCO Series 7000 Backdraft Damper weighs approximately 2 lbs/ft² (9.76 kg/m²). TAMCO Series 7000 WT and 7000 CW Backdraft Dampers weight approximately 3 lbs/ft² (14.65 kg/m²).
Two sections wide backdraft damper

Two or More Sections Wide


  • Ensure that all backdraft damper sections are straight, even, and aligned with each other.
  • Apply one 1¼” (32 mm) wide strap at the head and/or sill at each joint, where backdraft damper sections meet. Aluminum straps are to be installed on the back (sticker) side of the dampers.
  • Fasten aluminum straps to damper frames using #8 x ½” Tek screws. (Straps and screws are shipped with all multi-section backdraft dampers in a zip lock bag.)
Two sections high backdraft damper

Two or More Sections High


  • Ensure that all backdraft damper sections are straight, even, and aligned with each other.
  • Apply one 5/8” (16 mm) wide strap at each joint, where top and bottom sections meet. Aluminum straps are to be installed on the back (sticker) side of the dampers.
  • Fasten aluminum straps to damper frames using #8 x ½” Tek screws. (Straps and screws are shipped with all multi-section backdraft dampers in a zip lock bag.)
Two sections high by two sections wide backdraft damper

Multiple Sections Wide by
Multiple Sections High


  • Ensure that all backdraft damper sections are straight, even, and aligned with each other.
  • Apply one 1¼” (32 mm) wide strap at each joint, where top, bottom, left and right sections meet. Aluminum straps are to be installed on the back (sticker) side of the dampers.
  • Fasten aluminum straps to damper frames using #8 x ½” Tek screws.
    (Straps and screws are shipped with all multi-section backdraft dampers in a zip lock bag.)

Documents:


TAMCO Medium-Duty Backdraft Damper Installation Guidelines