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The SOUTHWARK METAL 1145R1610 is a 45-degree flat radius elbow fitting for rectangular sheet metal ductwork. It provides a controlled directional change in systems where a flat radius turn is required, as opposed to a square throat or curved radius configuration. Sized for 16-inch by 10-inch rectangular duct, this fitting is fabricated from galvanized steel and is installed by HVAC sheet metal technicians during new construction or duct retrofit projects. It maintains consistent cross-section geometry through the turn, supporting smoother airflow transitions and reducing turbulence at the bend.
This fitting is suited for residential and light commercial forced-air HVAC systems that use rectangular galvanized duct. It is typically installed in supply or return trunk lines where a 45-degree offset is needed to route ductwork around structural elements, beams, or confined mechanical spaces. The flat radius profile makes it compatible with standard rectangular duct fabrication practices and snap-lock or slip-joint assembly methods common in sheet metal work.
Designed as an OEM-style sheet metal fitting for standard 16-inch by 10-inch rectangular galvanized duct systems in residential and light commercial HVAC applications.
Installation is performed by licensed HVAC technicians or sheet metal contractors. Shut down the air handling unit and isolate the duct section before fitting removal or installation. Seal all joints with UL 181-rated mastic or foil tape per local mechanical code requirements. Secure the fitting with drive cleats and S-slips or equivalent connectors appropriate to the duct gauge and system pressure classification.
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