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CPS Composite-Plastic Standoff Post Base

The CPS is a composite-plastic standoff base designed for use both indoors and outdoors. The CPS attaches to the bottom of the solid wood column and to concrete with threaded rod and epoxy. The CPS is load rated and features either a square or a rectangle shape depending upon post dimensions.

Key Features

  • Provides code-required 1" standoff
  • Multiple sizes to support a variety of projects
  • Black finish for a custom look



  • Drill a 3/4"-diameter hole, 10" into the center of the post.
  • Clean out sawdust. Fill hole halfway with Simpson Strong-Tie® SET-3G™ epoxy anchoring adhesive.
  • Insert all-thread rod while twisting the rod, and allow the epoxy to set and cure.
  • Secure standoff to post using four 0.148" x 3" nails.


  • Drill a 3/4"-diameter hole per anchor design (see table footnote 2).
  • Clean out dust. Fill hole halfway with Simpson Strong-Tie SET-3G epoxy anchoring adhesive. Insert post subassembly into hole, and allow the epoxy to set and cure.
  • Post bases do not provide adequate resistance to prevent members from rotating about the base and therefore are not recommended for non-top-supported installations (such as fences or unbraced carports).

Related Literature

Product Information Table

Fastener Production Information and Stuff & Things
Model No. Nominal Post Size W (in.) L (in.) H (in.) Coating/Material Packaging Qty.
CPS10 10x10 9 9 1/4 1 Composite Plastic 1
CPS12 12x12 11 11 1 Composite Plastic 1
CPS46 4x6 3 5/16 5 5/16 1 Composite Plastic 1
CPS4-R 4x4 3 1/4 3 1/4 1 Composite Plastic 1
CPS5 5x5 4 1/8 4 1/8 1 Composite Plastic 1
CPS6 6x6 5 5/16 5 5/16 1 Composite Plastic 1
CPS7 8x8 7 1/4 7 1/4 1 1/4 Composite Plastic 1

Load Tables

    These products are made from non-corrosive materials.

CPS/PBV Standoff Bases Load Table
  1. Allowable uplift load capacities are for solid sawn posts with a specific gravity of 0.36 minimum.
  2. All allowable uplift loads are based on a lowest ultimate load from testing divided by a safety factor of 4. Concrete anchorage to be designed by others; refer to the Simpson Strong-Tie® Anchoring, Fastening and Restoration Systems for Concrete and Masonry catalog. Uplift loads shall not exceed those shown in the table.
  3. Downloads are calculated based on the standoff bearing area and a concrete strength of 2,500 psi.
  4. Allowable loads may not be increased for the duration of the load.
  5. Fasteners: Nail dimensions in the table are listed diameter by length. For additional information, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connectors.

Code Reports & Compliance