Southwark Metal TD_18X8X48 Sheet Metal Trunk Duct 18x8x48

Product Description

The SOUTHWARK METAL TD_18X8X48 is a rectangular sheet metal trunk duct section used in forced-air HVAC distribution systems. Fabricated from hot dip galvanized steel, this duct section measures 18 inches by 8 inches in cross-section and 48 inches in length. It connects using a button snap-lock seam with S-cleat and drive connection hardware, allowing for fast, secure assembly on the job. Cross-broken panels add rigidity and reduce drumming under airflow. HVAC installers and sheet metal contractors use this duct section when building or extending trunk-and-branch supply or return air systems in residential and light commercial applications.

This trunk duct section is suited for new construction and retrofit ductwork installations where a rectangular main trunk run is required. The 18-by-8-inch profile fits common residential and light commercial framing bays and mechanical rooms. Its galvanized steel construction resists corrosion in typical conditioned-space applications. The S-cleat and drive connection ends allow it to join directly with matching sections, fittings, and transitions that follow SMACNA and ACCA ductwork standards.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in conditioned-space installations
• Button snap-lock seam provides a tight longitudinal joint without additional fasteners
• S-cleat and drive connection ends for fast, standard transverse joint assembly
• Cross-broken panel faces add structural rigidity and reduce airflow-induced vibration
• Compliant with ACCA and SMACNA applicable standards
• 48-inch length reduces the number of joints needed in long trunk runs

Compatibility

Designed as an OEM-style replacement and new-installation trunk duct section compatible with rectangular duct systems using standard S-cleat and drive transverse connections per SMACNA and ACCA ductwork guidelines.

Installation Notes

Installation should be performed by a licensed HVAC technician or sheet metal contractor familiar with SMACNA duct construction standards. Shut down and lock out the air handling unit before making connections to an existing duct system. Use proper sheet metal snips, drive cleats, and S-cleat tools to complete transverse joints, and support the duct at intervals required by applicable mechanical codes. Seal all longitudinal seams and transverse joints with listed duct sealant or UL 181-listed tape as required by local mechanical code.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Width (Size A): 18 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_18X8X48