Loren Cook RCG-28 Roof Curb with Damper Tray Steel

Product Description

The LOREN COOK RCG-28 is a galvanized steel roof curb with an integrated damper tray, designed for rooftop HVAC equipment installations. Built from 18-gauge steel with a galvanized finish, it provides a weather-resistant, structurally sound mounting base for rooftop fans, exhaust units, or air handling equipment. The inside square dimension measures 28.5 x 28.5 inches, with an outside square of 32.5 x 32.5 inches and a height of 13.5 inches. HVAC mechanics and sheet metal contractors install this curb during rooftop equipment placement to establish a proper sealed interface between the roof deck and the mounted unit.

This roof curb is suited for commercial and light-industrial rooftop applications where a damper tray is required as part of the exhaust or ventilation assembly. The integrated damper tray eliminates the need for a separate field-fabricated component, simplifying the installation sequence. It is appropriate for new construction as well as equipment replacement projects where an existing curb is being upgraded or swapped out to match current equipment footprint requirements.

Key Features

• Integrated damper tray eliminates separate field fabrication
• 18-gauge galvanized steel construction for corrosion resistance
• Inside square dimension: 28.5 x 28.5 inches
• Outside square dimension: 32.5 x 32.5 inches
• 13.5-inch height provides clearance for roof slope and flashing
• Galvanized finish suited for outdoor rooftop exposure

Compatibility

Designed as an OEM-style roof curb for rooftop exhaust fans and ventilation units requiring a 28.5 x 28.5 inch inside square mounting footprint with an integrated damper tray.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal contractor. Power to all associated equipment must be shut off and locked out before work begins. The curb must be properly flashed and sealed to the roof membrane per local building code requirements to prevent water infiltration. Do not mount rooftop equipment to the curb until all flashing, sealing, and fastening work is complete and inspected.

Technical Specifications

• Inside Square Dimension: 28.5 x 28.5 inches
• Outside Square Dimension: 32.5 x 32.5 inches
• Height: 13.5 inches
• Material: Steel
• Material Gauge: 18 gauge
• Finish: Galvanized

Standard Information

• Brand: LOREN COOK
• Manufacturer Part Number: RCG-28