Southwark Metal 84ST_2X10 Ductboard Collar Start 10 Inch

Product Description

The SOUTHWARK METAL 84ST_2X10 is a sheet metal ductboard collar start fitting designed for transitioning between sheet metal trunk lines and ductboard branch runs in forced-air HVAC distribution systems. Fabricated from hot dip galvanized steel, this collar provides a durable, corrosion-resistant connection point where ductboard sections originate off a main duct. The 2-inch tab design secures the fitting firmly against the ductboard surface during installation. At 10 inches in size, it fits standard residential and light commercial ductwork configurations. HVAC installers and sheet metal mechanics work with this type of fitting during new construction and duct replacement projects.

This collar start is used in ducted forced-air systems where ductboard is the primary branch distribution material. It is commonly installed at take-off points along sheet metal main trunks in residential and light commercial applications. The fitting seats against the ductboard and is secured using the integral 2-inch tab, creating a tight, low-leakage transition. Projects governed by ACCA and SMACNA standards commonly specify this type of collar start for compliant duct system fabrication and installation.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in conditioned and unconditioned space installations
• 2-inch tab design for secure attachment to ductboard panels
• 10-inch size fits standard residential and light commercial ductwork
• Meets ACCA and SMACNA applicable standards for duct system fabrication
• Provides a clean, low-leakage transition from sheet metal trunk to ductboard branch

Compatibility

Designed as an OEM-style sheet metal fitting for use with 10-inch ductboard branch installations in residential and light commercial forced-air HVAC duct systems fabricated and installed to ACCA and SMACNA standards.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal mechanics. Power down the air handling system and verify the unit is de-energized before working in the duct system. The collar start should be fitted and secured per SMACNA duct construction standards, with joints sealed using approved mastic or foil-backed tape as required by local mechanical code. Do not compress or distort the tab during installation, as proper tab contact is necessary for a secure, low-leakage fit against the ductboard.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Size: 10 inches
• Tab Length: 2 inches
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 84ST_2X10