Southwark Metal 31PF-16GA_4X12 Plaster Frame Boot Rail 4x12

Product Description

The SOUTHWARK METAL 31PF-16GA_4X12 is a sheet metal duct plaster frame boot rail designed for return air duct terminations in framed wall and floor installations. Constructed from hot dip galvanized steel at 16 gauge thickness, this frame provides a rigid, corrosion-resistant border that supports drywall or plaster finishes around a 4 inch x 12 inch duct boot opening. HVAC installers use it to create a clean, code-acceptable transition between the duct boot and the finished surface. The heavier 16 gauge material holds its shape during drywall work and resists damage from job site handling.

This plaster frame is suited for residential and light commercial HVAC installations where return air grilles terminate through drywall, plaster, or similar finished surfaces. It is installed around the perimeter of the duct boot opening before the finish surface is applied, allowing the grille to seat flush against the completed wall or ceiling. Typical applications include new construction framing and renovation projects where duct boots are set prior to finish work.

Key Features

• 16 gauge hot dip galvanized steel construction for rigidity and corrosion resistance
• 4 inch x 12 inch frame size fits standard return air boot openings
• Designed for return air duct terminations in framed assemblies
• Compliant with ACCA and SMACNA applicable standards
• Supports clean drywall or plaster finish at grille opening

Compatibility

Designed as an OEM-style replacement and new-construction component for residential and light commercial return air duct boot assemblies requiring a 4 inch x 12 inch plaster frame rail.

Installation Notes

Installation is performed by licensed HVAC technicians or sheet metal contractors as part of duct system rough-in, typically before finish surfaces are applied. Power down the air handling system before working in the duct cavity. Secure the frame to the framing members per SMACNA guidelines and verify the opening dimension matches the grille and boot before fastening. Do not install the finish grille until the surrounding drywall or plaster work is complete and the frame is fully secured.

Technical Specifications

• Frame Size: 4 inches x 12 inches
• Material: Hot Dip Galvanized Steel
• Material Thickness: 16 Gauge
• Type: Return Air
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 31PF-16GA_4X12