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 Ventilated Curbs, Square Curb, 29 x 29 in Inside Dim - Roof Curbs
DaytonRoof Curbs

Dayton Roof Curb: Fixed Ventilated Curbs, Square Curb, 29 x 29 in Inside Dim

The Dayton Roof Curb is a fixed ventilated curb designed for downblast fans, constructed from steel with a galvanized finish. It features a square configuration with an inside width of 29 in and an outside width of…

SKU 3G-OTH-79435

Brand
Dayton
Item
Roof Curb: Fixed Ventilated Curbs, Square Curb, 29 x 29 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
4HX58
Type
Square Curb, Mfr Part # 4HX58
Material
Steel
Finish
Galvanized
Standards
UL 762
Inside Dim
29 x 29 in
For Fan Type
Downblast Fans
Curb Inside Width
29 in
Curb Outside Width
32-1/2 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 ventilated curb designed for downblast fans, constructed from steel with a galvanized finish. It features a square configuration with an inside width of 29 in and an outside width of 32-1/2 in. This curb complies with UL 762 standards.

Frequently Asked Questions

What is the Dayton Roof Curb used for?

The Dayton Roof Curb is a fixed ventilated curb designed to mount downblast fans on commercial or industrial roofs. It provides a stable, weather-resistant base that directs exhaust airflow upward while preventing rain entry. Common applications include HVAC systems, ventilation exhaust, and industrial air handling in buildings requiring UL 762 compliance.

What are the specifications of the Dayton Roof Curb 4HX58?

The Dayton Roof Curb 4HX58 is a square fixed ventilated curb with a 29 in inside width and 32-1/2 in outside width. It is made of steel with a galvanized finish, designed for downblast fans. It complies with UL 762 standards. The manufacturer part number is 4HX58, and the brand is DAYTON.

Where to buy the Dayton Roof Curb 4HX58 worldwide?

You can source the Dayton Roof Curb 4HX58 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time. 3G Electric supplies genuine DAYTON roof curbs for international projects.

How to install a Dayton Roof Curb for downblast fans?

Install the Dayton Roof Curb on a flat roof deck, ensuring the curb opening aligns with the fan duct. Secure the curb to the roof structure with appropriate fasteners, seal all joints with roofing-grade sealant, and mount the downblast fan on top. Follow local building codes and the fan manufacturer's instructions for proper airflow and weatherproofing.

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 Ventilated Curbs, Square Curb, 25 x 25 in Inside Dim, Mfr Part # 4HX57. Key specifications — Curb Outside Width: 28-1/2 in; Finish: Galvanized; For Fan Type: Downblast Fans; Standards: UL 705; Manufacturer Part Number: 4HX57; Brand: DAYTON; Curb Inside Width: 25 in; Material: Steel.
Dayton
Roof Curb: Fixed Ventilated Curbs, Square Curb, 25 x 25 in Inside Dim, Mfr Part # 4HX57. Key specifications — Curb Outside Width: 28-1/2 in; Finish: Galvanized; For Fan Type: Downblast Fans; Standards: UL 705; Manufacturer Part Number: 4HX57; Brand: DAYTON; Curb Inside Width: 25 in; Material: Steel.
Roof Curb: Fixed Ventilated Curbs, Square Curb, 21 x 21 in Inside Dim, Mfr Part # 4HX56. Key specifications — Curb Outside Width: 24-1/2 in; Finish: Galvanized; For Fan Type: Downblast Fans; Standards: NFPA 96; Manufacturer Part Number: 4HX56; Brand: DAYTON; Curb Inside Width: 21 in; Material: Steel.
Dayton
Roof Curb: Fixed Ventilated Curbs, Square Curb, 21 x 21 in Inside Dim, Mfr Part # 4HX56. Key specifications — Curb Outside Width: 24-1/2 in; Finish: Galvanized; For Fan Type: Downblast Fans; Standards: NFPA 96; Manufacturer Part Number: 4HX56; Brand: DAYTON; Curb Inside Width: 21 in; Material: Steel.
Roof Curb: Fixed Ventilated Curbs, Square Curb, 14 x 14 in Inside Dim, Mfr Part # 4HX54. Key specifications — Curb Outside Width: 17-1/2 in; Finish: Galvanized; For Fan Type: Upblast Fans; Standards: UL 705; Manufacturer Part Number: 4HX54; Brand: DAYTON; Curb Inside Width: 14 in; Material: Steel.
Dayton
Roof Curb: Fixed Ventilated Curbs, Square Curb, 14 x 14 in Inside Dim, Mfr Part # 4HX54. Key specifications — Curb Outside Width: 17-1/2 in; Finish: Galvanized; For Fan Type: Upblast Fans; Standards: UL 705; Manufacturer Part Number: 4HX54; Brand: DAYTON; Curb Inside Width: 14 in; Material: Steel.
Roof Curb: Fixed Ventilated Curbs, Square Curb, 41 x 41 in Inside Dim, Mfr Part # 4HX60. Key specifications — Curb Outside Width: 44-1/2 in; Finish: Galvanized; For Fan Type: Upblast Fans; Standards: NFPA 96; Manufacturer Part Number: 4HX60; Brand: DAYTON; Curb Inside Width: 41 in; Material: Steel.
Dayton
Roof Curb: Fixed Ventilated Curbs, Square Curb, 41 x 41 in Inside Dim, Mfr Part # 4HX60. Key specifications — Curb Outside Width: 44-1/2 in; Finish: Galvanized; For Fan Type: Upblast Fans; Standards: NFPA 96; Manufacturer Part Number: 4HX60; Brand: DAYTON; Curb Inside Width: 41 in; Material: Steel.
Roof Curb: Fixed Ventilated Curbs, Square Curb, 37 x 37 in Inside Dim, Mfr Part # 4HX59. Key specifications — Curb Outside Width: 40-1/2 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; Standards: UL 762; Manufacturer Part Number: 4HX59; Brand: DAYTON; Curb Inside Width: 37 in; Material: Steel.
Dayton
Roof Curb: Fixed Ventilated Curbs, Square Curb, 37 x 37 in Inside Dim, Mfr Part # 4HX59. Key specifications — Curb Outside Width: 40-1/2 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; Standards: UL 762; Manufacturer Part Number: 4HX59; Brand: DAYTON; Curb Inside Width: 37 in; Material: Steel.
Roof Curb: Fixed Ventilated Curbs, Square Curb, 17 x 17 in Inside Dim, Mfr Part # 4HX55. Key specifications — Curb Outside Width: 20-1/2 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; Standards: UL 762; Manufacturer Part Number: 4HX55; Brand: DAYTON; Curb Inside Width: 17 in; Material: Steel.
Dayton
Roof Curb: Fixed Ventilated Curbs, Square Curb, 17 x 17 in Inside Dim, Mfr Part # 4HX55. Key specifications — Curb Outside Width: 20-1/2 in; Finish: Galvanized; For Fan Type: Filtered Supply Fans; Standards: UL 762; Manufacturer Part Number: 4HX55; Brand: DAYTON; Curb Inside Width: 17 in; Material: Steel.

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.