Simpson CPT44SS CPT Stainless-Steel Concealed Post Base for 4x4 by Simpson Strong-Tie is a premium concealed post base engineered for 4x4 nominal post sizes. It incorporates a knife plate with a standoff base to achieve a clean, concealed look while providing a code-compliant 1-in. standoff height above concrete - reducing the potential for decay at post or column ends and meeting requirements for structures exposed to weather, water splash, or basement conditions. Constructed from stainless steel for high and severe corrosion resistance, the CPT44SS is installed with 1/2-in. diameter stainless-steel pins that are supplied with the connector.

Key Features

• The 1-in. standoff height is code-required when supporting permanent structures that are exposed to weather or water splash, or in basements
• The standoff reduces the potential for decay at post or column ends
• The anchorage for the CPT44SS can be either cast-in-place or retrofit with adhesive or mechanical anchors
• Nominal post size: 4x4
• Base: 12 ga.; knife plate: 10 ga.
• Stainless steel for high/severe corrosion resistance

Specifications

• MPN: CPT44SS
• Brand: Simpson Strong-Tie
• Nominal/Rough Post Size: 4x4
• Material: Stainless Steel
• Finish: Stainless Steel
• Gauge: Base 12 ga.; knife plate 10 ga.
• Standoff Height: 1 in.
• Install With: 1/2-in. stainless-steel anchor bolts and supplied dowels
• Width: 3-1/2 in.
• Length: 3-1/2 in.
• Country of Origin: United States

What's Included

Each pack contains (1) CPT44SS Concealed Post Base, 1/2-in. diameter stainless-steel pins (supplied).

Downloads and Resources

• Post Size: 4X4Fasteners required: (2) 1/2" Concrete AnchorsLength: 3-1/2"Manufacturer name: Simpson Strong-TieView Spec Sheet

Frequently Asked Questions

Why is a 1-in. standoff height important for this post base?

The 1-in. standoff height is code-required when supporting permanent structures that are exposed to weather or water splash, or in basements. It also reduces the potential for decay at post or column ends by keeping the wood member elevated above the concrete surface.

What post size is the CPT44SS designed for?

The CPT44SS is designed for a nominal 4x4 post size.

What anchorage options are available for the CPT44SS?

The anchorage for the CPT44SS can be either cast-in-place or retrofit with adhesive or mechanical anchors, providing flexibility for both new construction and existing concrete applications.

Why is stainless steel used for the CPT44SS, and what fasteners are required?

Stainless steel is used to provide high and severe corrosion resistance, making the CPT44SS suitable for demanding outdoor and moisture-prone environments. It is installed with 1/2-in. stainless-steel anchor bolts and the supplied stainless-steel dowels to maintain corrosion resistance throughout the entire connection.

Note: Product dimensions and/or screw or bolt holes may differ from picture.