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$28.95
Professional mounting solution for attaching railings to round columns. Connect your railing system to existing round posts with precision-engineered adapters.
8″ Round Column Adapters
10″ Round Column Adapters
These precision-fit adapters provide seamless railing attachment with multiple sizes for different column diameters. They require no custom fabrication and feature weather-resistant construction for indoor and outdoor use. These adapters are essential when you have existing round columns and need to add railing systems, including attaching deck railings to round porch columns, connecting stair railings to cylindrical posts, upgrading existing column structures with new railings, and commercial installations with architectural round columns.
Transform your round columns into functional railing support with professional column adapters.
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They provide a flat mounting surface on 8″ or 10″ round columns, allowing standard brackets to be installed securely.
MMC offers adapters for 8″ and 10″ round columns, suitable for both flat and stair railing brackets.
These adapters are made from extruded vinyl.
For 8″ and 10” column adapters:
They are sold in 4-packs enough for a railing section.
Yes—vinyl adapters can be cut down to fit specific project dimensions, accommodating a variety of vinyl railing systems.
Yes—MMC offers different sizes to accommodate your mounts for both 8″ and 10″ columns.
Adapters wrap around the column to create flat mounting surfaces. They’re secured using your mounting brackets which attach directly to them (You may need to provide longer screws if necessary).
Yes—they work with both aluminum railing and vinyl railing systems, offering flexible solutions.
Adapters offer a faster, more precise, and less labor-intensive solution than building flat column plates by hand, saving time while maintaining aesthetics and structural integrity.
Free shipping in the continental US for any purchase over $3000. Deliveries to residential addresses in the continental US will incur a $200 charge unless the total sale is over $4500. Our system will automatically show you the appropriate shipping option at checkout – either free shipping or freight shipping with contact for pricing.
We invite you to look at our QuickShip Courtyard Fencing for styles that can ship immediately. Please call first to check on available inventory in Courtyard. Some special-order products have a 3-4 week order time.
Applies only to the Continental U.S: Westbury Gates, Verticable Sections, Sorrento Sections, and Westbury 7-8′ sections have a $1,000 minimum for free shipping. Juliette Balconies require a $1,500 minimum for free shipping. Courtyard Fencing purchases cannot be combined with non-Courtyard items to qualify for free shipping. Our system will automatically show you the appropriate shipping option at checkout – either free shipping or freight shipping with contact for pricing.