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Galvanized steel roof curb adapter, square 34 in curb to 30 in fan base, 5 in tall

Dayton

Dayton 3AZL2 Roof Curb Adapter Trap 34 in Curb 30 in Fan Base

SKU CH-E7BV-MFJDQ MPN 3AZL2

Adapts a 30 in fan base to a 34 in roof curb for downblast, filtered supply and upblast fans using galvanized steel construction with included fasteners

  • TypeDrain Components
  • Adapts 30 in fan base to 34 in roof curb
  • Galvanized steel construction resists corrosion on rooftop installations
  • Includes eight Tinnerman speed nuts and bolts for secure mounting
  • 18 gauge metal thickness provides structural rigidity
  • Five inch overall height maintains proper fan clearance

Roof Curb Adapter for Downblast and Upblast Fans

The Dayton 3AZL2 adapts a 30 in fan base to a 34 in square roof curb. It fits downblast fans, filtered supply fans and upblast fans. The galvanized steel construction includes eight 1/4-20 Tinnerman speed nuts and eight 1/4-20 x 3/4 bolts for installation. Overall height is 5 in with a 2 1/2 in top flange.

Installers Matching 30 in Fan to 34 in Curb

This adapter suits contractors and facility managers connecting a 29 1/2 in fan side to a 34 in curb side. The 18 ga steel thickness and two fasteners per side support standard mounting. It does not suit installations needing a different curb size, fan base dimension or non-galvanized finish.

34 in Curb Side to 30 in Fan Base Increaser

The critical specification is the increaser function that bridges a 34 in curb side outer dimension to a 29 1/2 in fan side width. This single dimensional match determines whether the adapter fits the specific roof curb and fan combination on site.

Highlights

  • Adapts 30 in fan base to 34 in roof curb
  • Galvanized steel construction resists corrosion on rooftop installations
  • Includes eight Tinnerman speed nuts and bolts for secure mounting
  • 18 gauge metal thickness provides structural rigidity
  • Five inch overall height maintains proper fan clearance

Specifications

TypeDrain Components
BrandDayton
Model3AZL2

Questions about this item

Should I choose the 34 in curb adapter or a different size for my 30 in fan base?

This adapter is made to fit a 34 in roof curb while accepting a 29 1/2 in fan base, effectively bridging the 30 in fan size to the larger curb opening.

What does the 18 ga steel thickness mean for durability on the roof?

The 18 ga galvanized steel provides structural rigidity for the 5 in overall height and resists corrosion in outdoor rooftop installations.

How does the 1/4-20 fastener pattern limit installation options?

Each side uses two 1/4-20 bolts with Tinnerman speed nuts, giving eight fixed attachment points that align with standard curb and fan base flanges.

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