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Galvanized steel damper retaining angle, 11 3/4 in wide by 7 3/4 in high, 20 ga, for horizontal or vertical mounting

Dayton

Dayton 2TGG9 Damper Retaining Angle, Vertical or Horizontal

SKU CH-S3YV-9GXN4

Galvanised steel damper retaining angle with UL 555 rating, suitable for vertical or horizontal mounting

  • UL 555 compliant for code-approved fire damper installation
  • Galvanized steel construction resists corrosion in duct environments
  • 20 ga thickness provides rigid support for damper blades
  • Mounts vertically or horizontally for flexible duct layouts
  • 11 3/4 in width fits standard damper frame dimensions

Dayton 2TGG9 Damper Retaining Angle

This galvanised steel retaining angle secures HVAC dampers in both vertical and horizontal mounting orientations. It meets UL 555 standards for fire damper installations. The 20-gauge construction provides structural rigidity for commercial ductwork systems. Suitable for new installations or replacement of damaged mounting hardware.

Installers fitting UL 555 rated fire dampers

Contractors needing a code-compliant mounting bracket for standard rectangular dampers will find this angle matches the required specifications. Projects requiring stainless steel, custom dimensions, or proprietary brand-specific brackets should look at alternative hardware. The fixed 20-gauge thickness cannot be substituted where heavier gauge material is specified by engineering drawings.

Under sustained thermal and mechanical load

The galvanised coating resists corrosion during long-term exposure to humid airstreams within duct systems. Rigid 20-gauge steel maintains alignment when dampers cycle repeatedly under system pressure. UL 555 listing confirms the assembly retains integrity during the fire endurance test period. No fusible link is included, so the angle relies on the damper's own release mechanism.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $25.99
Cheaper than about 67% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameDAYTON

Questions about this item

What size duct opening matches the 11 3/4 inch width of this retaining angle?

The angle spans 11 3/4 inches wide, so it fits a damper frame with the same clear opening.

Can the 20 ga galvanized steel angle be mounted vertically on an existing horizontal damper frame?

Yes, the design allows both vertical and horizontal mounting on the same frame.

How do I verify the angle meets the UL 555 standard after installation?

Check for the UL 555 marking stamped on the galvanized steel once the angle is secured.

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