Southwark Metal 20_30X10 Trunk Duct Starting Collar 30x10

Product Description

The SOUTHWARK METAL 20_30X10 is a straight starting collar designed for sheet metal trunk duct systems in forced-air HVAC applications. Fabricated from hot dip galvanized steel, this collar serves as the connection point where a branch duct or fitting transitions off a main trunk duct. It measures 30 inches by 10 inches and is built to the dimensional and performance standards set by ACCA and SMACNA. HVAC sheet metal installers and mechanical contractors use this fitting during new construction and retrofit ductwork fabrication to establish clean, sealed takeoff connections from the trunk line.

This starting collar is suited for residential and light commercial forced-air duct systems where a rectangular trunk duct requires a direct, straight collar takeoff. The straight body pattern simplifies alignment in tight plenum or mechanical room installations. It is commonly installed by sheet metal mechanics and HVAC contractors working on supply or return trunk duct assemblies that require a secure, properly sized starting point for downstream branch runs.

Key Features

• Hot dip galvanized steel construction provides corrosion resistance for long-term duct system performance
• Straight body pattern allows direct, aligned connection off the trunk duct face
• 30 inches by 10 inches size suits standard trunk duct fabrication layouts
• Meets ACCA and SMACNA applicable standards for sheet metal ductwork fittings
• Starting collar design provides a clean, defined takeoff point on the main trunk

Compatibility

Designed as an OEM-style sheet metal fitting for rectangular trunk duct systems requiring a straight starting collar takeoff in forced-air HVAC installations.

Installation Notes

Installation should be performed by a licensed sheet metal mechanic or HVAC contractor in accordance with SMACNA ductwork installation standards. Secure all duct connections with approved fasteners and seal joints with mastic or listed duct tape per applicable mechanical codes before system startup. Verify trunk duct dimensions and alignment before fastening the collar in place. Always de-energize the air handling system before working on connected ductwork.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Size: 30 inches x 10 inches
• Body Pattern: Straight
• Type: Starting
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 20_30X10