Southwark Metal TD_18X12X48 Trunk Duct 18x12x48

Product Description

The SOUTHWARK METAL TD_18X12X48 is a rectangular sheet metal trunk duct section used in forced-air HVAC distribution systems. Fabricated from hot-dip galvanized steel, it provides a corrosion-resistant duct body rated for supply and return air applications. The section measures 18 inches by 12 inches in cross-section and runs 48 inches in length. It features a button snap-lock seam with S-cleat and drive connection ends for field assembly, and cross-breaking on the flat panels to resist flex noise and add panel rigidity. Licensed HVAC sheet metal installers and ductwork fabricators are the typical installers of this product.

This trunk duct section is used in residential and light commercial forced-air systems where a main supply or return trunk run is constructed on-site or in a shop. The 18-by-12-inch profile suits medium to larger air-handler installations requiring defined trunk geometry. The S-cleat and drive connection end configuration is the standard SMACNA method for joining rectangular duct sections in sequence, making this section compatible with other duct components built to the same connection standard.

Key Features

• Hot-dip galvanized steel construction for corrosion resistance in air distribution environments
• Button snap-lock longitudinal seam for secure panel closure during assembly
• S-cleat and drive connection ends per standard SMACNA rectangular duct joining practice
• Cross-broken flat panels reduce oil-canning and dampen airflow noise
• Meets ACCA and SMACNA applicable standards for sheet metal ductwork fabrication
• 48-inch section length reduces the number of joints needed in a trunk run

Compatibility

Designed as an OEM-style rectangular trunk duct section compatible with forced-air HVAC systems using standard S-cleat and drive connection hardware. Suitable for use with other duct sections, fittings, and accessories fabricated to SMACNA rectangular duct construction standards.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal worker familiar with SMACNA duct construction standards. Shut down and lock out the air-handling unit before connecting or modifying any duct section in the system. S-cleat and drive connections require appropriate hand seamers and drive cleats; secure all joints with sheet metal screws and seal with UL 181-listed duct sealant or mastic per local mechanical code requirements. Support hangers must be spaced per SMACNA guidelines to prevent sag and maintain system static pressure integrity.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Width (Size A): 18 inches
• Height (Size B): 12 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_18X12X48