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Galvanised steel roof curb adapter reducing 30 in fan base to 26 in curb, 18 ga, 5 in overall height

Dayton

Dayton 3AZK5 Roof Curb Adapter Trap 26 in to 30 in 18 ga

SKU CH-TVGV-1R4JY MPN 3AZK5

Steel roof curb adapter reduces a 30 in fan base to fit a 26 in curb, includes mounting hardware

  • TypeDrain Components
  • Adapts 30 in fan base to 26 in curb
  • Galvanised steel construction resists corrosion
  • 18 ga thickness provides structural rigidity
  • Includes eight Tinnerman speed nuts and bolts
  • Five inch overall height fits standard installations

Roof Curb Adapter Reducer

The Dayton 3AZK5 is a steel roof curb adapter that reduces a 30 inch fan base to fit a 26 inch curb. It is built for installers mounting downblast, filtered supply or upblast fans on commercial rooftops.

Galvanized Steel Construction

The adapter body is 18 gauge galvanized steel with a 5 inch overall height and a 2 1/2 inch top flange. Eight 1/4-20 Tinnerman speed nuts and eight matching bolts ship with the unit so the connection can be completed without sourcing extra hardware.

Sustained Weather Exposure

The galvanized finish resists corrosion during long-term outdoor service while the bolted joints maintain alignment under vibration from continuous fan operation. Installers who need a larger curb opening or a different fan base size will need a separate adapter.

Highlights

  • Adapts 30 in fan base to 26 in curb
  • Galvanised steel construction resists corrosion
  • 18 ga thickness provides structural rigidity
  • Includes eight Tinnerman speed nuts and bolts
  • Five inch overall height fits standard installations

Specifications

TypeDrain Components
BrandDayton
Model3AZK5

Questions about this item

How much does the 18 ga steel curb adapter flex under continuous vibration from a downblast fan?

The 18 ga galvanized steel construction with eight 1/4-20 bolts and Tinnerman speed nuts provides a rigid connection that resists flexing during sustained fan operation.

Does the adapter trap heat or amplify noise when installed between a 30 in fan base and 26 in roof curb?

The 5 in overall height and 2 1/2 in top flange create an air gap that does not restrict airflow, so heat buildup and noise transmission remain minimal during all-day use.

What existing curb and fan dimensions must I already have for this 3AZK5 adapter to fit?

You need a 26 in square roof curb and a fan with a 29 1/2 in base; the adapter reduces the 30 in fan footprint to match the 26 in curb opening.

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