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The Simpson Strong‑Tie CPS Composite‑Plastic Standoff Post Base is a molded composite plastic connector designed to elevate and support wood posts above concrete while providing a required standoff for moisture protection. Unlike traditional steel bases, the CPS is non‑metallic and will not rust, offering long‑term durability in outdoor or treated‑wood applications. It’s commonly used in deck, pergola, and porch support installations where a clean, elevated transition from concrete footing to wood post is needed.
Key Specifications:
Material: Engineered composite plastic—won’t rust and resists outdoor exposure.
Standoff Height: Provides the code‑required 1″ standoff between the bottom of the post and concrete.
Compatible Post Sizes: Available in multiple sizes for nominal posts including 4×4, 4×6, 5×5, 6×6, 8×8, 10×10, and 12×12 (specific model determines size).
Finish: Typically black composite for durability and aesthetic coordination.
Fastening: Secures to the post with nails or screws; anchors into concrete using epoxy and anchor bolts per manufacturer instructions.
Benefits for Contractors and Homeowners: This standoff base elevates posts above concrete slab or footing surfaces, helping reduce moisture transfer into the wood and the potential for rot or decay. Its engineered plastic construction eliminates rust concerns common with traditional metal posts bases, making it especially valuable in climates with high moisture or close proximity to water. The variety of available sizes lets installers match the base to the appropriate post dimension for a clean, secure fit without custom fabrication.
Whether used in new deck construction or structural retrofit projects, the CPS Composite‑Plastic Standoff Post Base provides a durable, low‑maintenance solution for connecting wood posts to concrete while maintaining necessary spacing and long‑term performance.
Composite decking stands apart from wood thanks to features that make it easier to own and maintain.
Enjoy long-term durability that outperforms traditional wood decking.
Choose from a wide range of colors to create a look that’s uniquely yours.
Built with advanced materials that resist rot, moisture, and warping.
With simple, occasional cleaning, your deck stays looking clean and polished
Your deck starts with a great plan. Use our decking design tool to explore layouts, materials, and finishes in a realistic, easy-to-use experience. See what’s possible and move forward with confidence—no surprises, just better builds.
Great – we love ‘em. Our team of experts has plenty of experience with tailoring a customized project. Talk to one of our associates on the floor, give us a call, or drop us a line to get started.
For Small Boxed Items:We offer a 1-2 day turnaround for small boxed items and a tracking number will be provided to keep you updated on the status of your delivery.
For LTL Freight (Common Carrier) Items:We use LTL freight for safe and efficient delivery. Your order will be scheduled for delivery, and it's important to note that for decking deliveries, a homeowner needs to be on hand to unload the product. This ensures a smooth and hassle-free delivery process. Rest assured, we're here to make the process as convenient as possible for you.
If you need it, we’ll get it! As your one-stop deck shop, you’ll find everything at your fingertips, or we’ll get it shipped out to you anywhere in the continental U.S.
The Deck Store takes the guesswork out of pulling your project together. Stop by our local retail store in Knoxville, or enjoy hassle-free online ordering.
Our customers are our #1 priority, and we’re dedicated to bringing you quality decking supplies. Our customer promise is to carry the highest quality products, so you can enjoy your deck or dock for years to come with minimal maintenance.
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