Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
Dayton Roof Curb: Fixed Nonventilated Curbs, Square Curb, 46 x 46 in Inside Dim - Roof Curbs
DaytonRoof Curbs

Dayton Roof Curb: Fixed Nonventilated Curbs, Square Curb, 46 x 46 in Inside Dim

The Dayton Roof Curb is a fixed nonventilated curb designed for use with 50-1/2 in square base filtered supply fans. It features a galvanized steel construction, measures 46 in inside width and 49 in outside width…

SKU 3G-OTH-79227

Brand
Dayton
Item
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 46 x 46 in Inside Dim
Category
Roof Curbs
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

Dayton
Manufacturer Part Number
3AZJ5
Type
Square Curb
Material
Steel
Finish
Galvanized
Standards
UL 705
Inside Dim
46 x 46 in
Outside Dim
49 in x 49 in
For Fan Type
Filtered Supply Fans
For Use With
50-1/2 in Square Base
Curb Inside Width
46 in
Curb Outside Width
49 in
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

Dayton Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Dayton Roof Curb is a fixed nonventilated curb designed for use with 50-1/2 in square base filtered supply fans. It features a galvanized steel construction, measures 46 in inside width and 49 in outside width, and complies with UL 705 standards.

Frequently Asked Questions

What is the Dayton Roof Curb 3AZJ5 used for?

The Dayton Roof Curb 3AZJ5 is a fixed nonventilated curb used to mount filtered supply fans with a 50-1/2 in square base on commercial or industrial roofs. It provides a stable, weatherproof transition between the fan and the roof opening, ensuring proper airflow and structural support.

What are the specifications of the Dayton Roof Curb 3AZJ5?

The Dayton Roof Curb 3AZJ5 is a square curb with a galvanized steel finish. Inside dimensions are 46 x 46 in, outside dimensions are 49 x 49 in. It is designed for filtered supply fans with a 50-1/2 in square base and complies with UL 705 standards.

Where to buy the Dayton Roof Curb 3AZJ5 worldwide?

You can source the Dayton Roof Curb 3AZJ5 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide locations. Contact us for availability and lead time.

How to install the Dayton Roof Curb 3AZJ5?

Install the Dayton Roof Curb 3AZJ5 by securing it to the roof structure with appropriate fasteners, ensuring a level base. Seal all joints with compatible roofing sealant to prevent leaks. Then mount the filtered supply fan onto the curb, aligning the 50-1/2 in square base. Follow local building codes and the fan manufacturer's instructions.

Used in

Common applications for Dayton
HVAC ventilation — DAYTON centrifugal upblast roof exhaust fans (SKU 7M7U3) for kitchen exhaust systems
Mechanical power transmission — DAYTON HTD timing pulleys (SKU 404GV0) for conveyor belt drives
Process water handling — DAYTON self-priming centrifugal pumps (SKU 2ZXT4) for dewatering or transfer
Roofing and building services — DAYTON fixed ventilated roof curbs (SKU 4HX59) for filtered supply fan installations
Material handling — DAYTON latch assemblies (SKU 2KEN4) for electric chain hoist hook safety
Industrial air movement — DAYTON downblast roof exhaust fans (SKU 3HFL9) for clean air exhaust in manufacturing plants

Dayton Products

3G Electric supplies Dayton roof curbs. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 42 x 42 in Inside Dim, 45 in x 45 in Outside Dim (MPN 3AZJ4). Key specifications — Curb Outside Width: 45 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; For Use With: 46-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ4; Brand: DAYTON; Curb Inside Width: 42 in.
Dayton
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 42 x 42 in Inside Dim, 45 in x 45 in Outside Dim (MPN 3AZJ4). Key specifications — Curb Outside Width: 45 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; For Use With: 46-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ4; Brand: DAYTON; Curb Inside Width: 42 in.
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 40.5 x 40 1/2 in Inside Dim, Mfr Part # 3AZJ3. Key specifications — Curb Outside Width: 43-1/2 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; For Use With: 45 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ3; Brand: DAYTON; Curb Inside Width: 40-1/2 in.
Dayton
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 40.5 x 40 1/2 in Inside Dim, Mfr Part # 3AZJ3. Key specifications — Curb Outside Width: 43-1/2 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; For Use With: 45 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ3; Brand: DAYTON; Curb Inside Width: 40-1/2 in.
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 34.5 x 34 1/2 in Inside Dim, Mfr Part # 3AZJ1. Key specifications — Curb Outside Width: 37-1/2 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; For Use With: 39 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ1; Brand: DAYTON; Curb Inside Width: 34-1/2 in.
Dayton
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 34.5 x 34 1/2 in Inside Dim, Mfr Part # 3AZJ1. Key specifications — Curb Outside Width: 37-1/2 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; For Use With: 39 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ1; Brand: DAYTON; Curb Inside Width: 34-1/2 in.
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 50 x 50 in Inside Dim, 53 in x 53 in Outside Dim (MPN 3AZJ6). Key specifications — Curb Outside Width: 53 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 54-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ6; Brand: DAYTON; Curb Inside Width: 50 in.
Dayton
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 50 x 50 in Inside Dim, 53 in x 53 in Outside Dim (MPN 3AZJ6). Key specifications — Curb Outside Width: 53 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 54-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ6; Brand: DAYTON; Curb Inside Width: 50 in.
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 36 x 36 in Inside Dim, 39 in x 39 in Outside Dim (MPN 3AZJ2). Key specifications — Curb Outside Width: 39 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 40-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ2; Brand: DAYTON; Curb Inside Width: 36 in.
Dayton
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 36 x 36 in Inside Dim, 39 in x 39 in Outside Dim (MPN 3AZJ2). Key specifications — Curb Outside Width: 39 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 40-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ2; Brand: DAYTON; Curb Inside Width: 36 in.
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 62 x 62 in Inside Dim, 65 in x 65 in Outside Dim (MPN 3AZJ8). Key specifications — Curb Outside Width: 65 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 66-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ8; Brand: DAYTON; Curb Inside Width: 62 in.
Dayton
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 62 x 62 in Inside Dim, 65 in x 65 in Outside Dim (MPN 3AZJ8). Key specifications — Curb Outside Width: 65 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 66-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ8; Brand: DAYTON; Curb Inside Width: 62 in.

More from Dayton

View all Dayton parts →
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 68 x 68 in Inside Dim, 71 in x 71 in Outside Dim (MPN 3AZJ9). Key specifications — Curb Outside Width: 71 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 72-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ9; Brand: DAYTON; Curb Inside Width: 68 in.
Dayton
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 68 x 68 in Inside Dim, 71 in x 71 in Outside Dim (MPN 3AZJ9). Key specifications — Curb Outside Width: 71 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 72-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZJ9; Brand: DAYTON; Curb Inside Width: 68 in.
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 11.5 x 12 1/2 in Inside Dim, Mfr Part # 2RB74. Key specifications — Curb Outside Width: 15 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; For Use With: 16 in Square Base; Standards: UL 705; Manufacturer Part Number: 2RB74; Brand: DAYTON; Curb Inside Width: 12-1/2 in.
Dayton
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 11.5 x 12 1/2 in Inside Dim, Mfr Part # 2RB74. Key specifications — Curb Outside Width: 15 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; For Use With: 16 in Square Base; Standards: UL 705; Manufacturer Part Number: 2RB74; Brand: DAYTON; Curb Inside Width: 12-1/2 in.
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 31.5 x 31 1/2 in Inside Dim, Mfr Part # 3AZH9. Key specifications — Curb Outside Width: 34-1/2 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 36 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZH9; Brand: DAYTON; Curb Inside Width: 31-1/2 in.
Dayton
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 31.5 x 31 1/2 in Inside Dim, Mfr Part # 3AZH9. Key specifications — Curb Outside Width: 34-1/2 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 36 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZH9; Brand: DAYTON; Curb Inside Width: 31-1/2 in.
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 24 x 24 in Inside Dim, 27 in x 27 in Outside Dim (MPN 3AZH7). Key specifications — Curb Outside Width: 27 in; Finish: Galvanized; For Fan Type: Upblast Fans; For Use With: 28-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZH7; Brand: DAYTON; Curb Inside Width: 24 in.
Dayton
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 24 x 24 in Inside Dim, 27 in x 27 in Outside Dim (MPN 3AZH7). Key specifications — Curb Outside Width: 27 in; Finish: Galvanized; For Fan Type: Upblast Fans; For Use With: 28-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3AZH7; Brand: DAYTON; Curb Inside Width: 24 in.
Roof Curb: Adj Nonventilated Curbs, Square Curb, 19 1/2 in to 28 in Inside Dim, Mfr Part # 2ZV83. Key specifications — Curb Outside Width: 23-1/2 in to 32 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 25 in to 30-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 2ZV83; Brand: DAYTON; Curb Inside Width: 19-1/2 in to 28 in.
Dayton
Roof Curb: Adj Nonventilated Curbs, Square Curb, 19 1/2 in to 28 in Inside Dim, Mfr Part # 2ZV83. Key specifications — Curb Outside Width: 23-1/2 in to 32 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 25 in to 30-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 2ZV83; Brand: DAYTON; Curb Inside Width: 19-1/2 in to 28 in.
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 41.5 x 41 1/2 in Inside Dim, Mfr Part # 2RB82. Key specifications — Curb Outside Width: 44-1/2 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 46 in Square Base; Standards: UL 705; Manufacturer Part Number: 2RB82; Brand: DAYTON; Curb Inside Width: 41-1/2 in.
Dayton
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 41.5 x 41 1/2 in Inside Dim, Mfr Part # 2RB82. Key specifications — Curb Outside Width: 44-1/2 in; Finish: Galvanized; For Fan Type: Downblast Fans; For Use With: 46 in Square Base; Standards: UL 705; Manufacturer Part Number: 2RB82; Brand: DAYTON; Curb Inside Width: 41-1/2 in.
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 20 x 20 in Inside Dim, 23 in x 23 in Outside Dim (MPN 3FLT5). Key specifications — Curb Outside Width: 23 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; For Use With: 24-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3FLT5; Brand: DAYTON; Curb Inside Width: 20 in.
Dayton
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 20 x 20 in Inside Dim, 23 in x 23 in Outside Dim (MPN 3FLT5). Key specifications — Curb Outside Width: 23 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; For Use With: 24-1/2 in Square Base; Standards: UL 705; Manufacturer Part Number: 3FLT5; Brand: DAYTON; Curb Inside Width: 20 in.
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 47.5 x 47 1/2 in Inside Dim, Mfr Part # 5EFJ3. Key specifications — Curb Outside Width: 50-1/2 in; Finish: Galvanized; For Fan Type: Upblast Fans; For Use With: 52 in square base; Standards: UL 705; Manufacturer Part Number: 5EFJ3; Brand: DAYTON; Curb Inside Width: 47-1/2 in.
Dayton
Roof Curb: Fixed Nonventilated Curbs, Square Curb, 47.5 x 47 1/2 in Inside Dim, Mfr Part # 5EFJ3. Key specifications — Curb Outside Width: 50-1/2 in; Finish: Galvanized; For Fan Type: Upblast Fans; For Use With: 52 in square base; Standards: UL 705; Manufacturer Part Number: 5EFJ3; Brand: DAYTON; Curb Inside Width: 47-1/2 in.