Southwark Metal TD_28X8X48 Sheet Metal Trunk Duct 28x8x48

Product Description

The SOUTHWARK METAL TD_28X8X48 is a rectangular sheet metal trunk duct section fabricated from hot dip galvanized steel for corrosion resistance and long service life in forced-air HVAC distribution systems. The section measures 28 inches by 8 inches in cross-section and runs 48 inches in length. It features button snap-lock construction with an S-cleat and drive connection for secure field assembly, along with cross breaking on the flat panels to resist oil-canning and maintain structural rigidity under airflow pressure. Licensed HVAC sheet metal mechanics and ductwork installers handle this type of trunk section on both new-construction and retrofit jobs.

This trunk duct section is suited for residential and light commercial forced-air supply systems where a low-profile rectangular main trunk is required. The 28 x 8 inch profile fits applications with restricted ceiling cavity depth or between-joist installations. The S-cleat and drive connection system allows the section to join to adjacent trunk sections or to transitions and fittings using standard sheet metal drive cleats and S-clips, which are common in SMACNA-compliant ductwork layouts. Installers working to ACCA Manual D airflow calculations or SMACNA construction standards will find this section meets those applicable standards directly.

Key Features

• Hot dip galvanized steel construction provides corrosion resistance for long-term duct system service
• Button snap-lock seam with S-cleat and drive connection for fast, secure field assembly
• Cross-broken flat panels reduce oil-canning and increase panel stiffness under static pressure
• 28 x 8 inch cross-section suits low-clearance residential trunk runs
• 48-inch section length minimizes joint count in long trunk runs
• Meets ACCA and SMACNA applicable standards

Compatibility

Designed as an OEM-style replacement or new-construction trunk duct section for rectangular forced-air HVAC supply systems using standard S-cleat and drive connections. Compatible with other trunk sections, transitions, and fittings that accept S-cleat and drive end connections on a 28 x 8 inch duct profile.

Installation Notes

Installation should be performed by a qualified sheet metal mechanic or licensed HVAC contractor in accordance with SMACNA duct construction standards and local mechanical code requirements. Shut down and lock out the air handler or furnace before connecting or modifying any trunk duct section in a live system. Drive cleats and S-clips should be fully seated and crimped on all four sides of each joint; all seams and joints should be sealed with listed duct mastic or UL 181-rated tape per local energy code. Support the trunk duct at intervals consistent with SMACNA hanger and support requirements to prevent sagging and joint separation.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Width (Size A): 28 inches
• Height (Size B): 8 inches
• Length: 48 inches
• Connection Type: Button Snap-Lock with S-Cleat and Drive Connection
• Panel Treatment: Cross Broken
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: TD_28X8X48