Southwark Metal USBR821142120 Unit Support Box R-8 Insulation 21 1/4 Inches X 21 Inches X 20 Inches

Product Description

The Southwark Metal USBR821142120 is a galvanized steel unit support box with R-8 insulation, measuring 21.25 inches wide by 21 inches long by 20 inches tall. It is designed for HVAC applications where a structural support platform is needed beneath rooftop or air handler units. HVAC contractors, sheet metal fabricators, and mechanical installers rely on unit support boxes to elevate equipment above the roof deck, protect ductwork penetrations, and provide a secure, level base for air conditioning and heating units. This box is built from hot dipped galvanized steel per ASTM A653 CS Type B, giving it strong corrosion resistance and long-term durability in outdoor and rooftop environments. The 26-gauge construction balances weight and structural integrity for typical commercial and residential installations. All sides of the box are beaded for added rigidity, which helps the box resist racking and deformation under equipment loads. A 1-inch turned-in flange runs along all sides to simplify connection to ductwork and roof curbs. A 1-inch flange is turned up on three sides, and the customer specifies whether the opening falls on the A-width or B-length side to match the field layout. The R-8 insulation is factory installed using adhesive and stick pins, reducing heat transfer and meeting common energy code requirements for insulated support boxes. This unit ships as a single piece and is sold individually. It is manufactured in the USA, making it a compliant choice for domestic content requirements on government and commercial projects. HVAC technicians searching for insulated roof curb boxes, unit support boxes, or galvanized equipment support platforms will find this product ready for direct installation.

• Hot dipped galvanized steel construction per ASTM A653 CS Type B for corrosion resistance
• R-8 insulation factory installed with adhesive and stick pins for energy code compliance
• All sides beaded for added strength with 1-inch turned-in flange on all sides

Product Highlights

The Southwark Metal USBR821142120 delivers a durable, insulated unit support platform built from 26-gauge galvanized steel and sized at 21.25 inches x 21 inches x 20 inches, ready for rooftop HVAC equipment installation.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: USBR821142120

Technical Specifications

• Width: 21.25 inches
• Length: 21 inches
• Height: 20 inches
• Size: 21 1/4 inches x 21 inches x 20 inches
• Weight: 20.1 pounds
• Gauge: 26 GA
• Material: Galvanized Steel
• Insulated: Yes
• Insulation Rating: R-8
• Adjustable: No
• Galvanized: Yes
• Country of Origin: USA
• Unit of Measure: EA
• Cubic Measurement: 5.1649
• Prop 65: Yes