The Simpson CBSQ88-SDS2HDG Hot-Dip Galvanized Standoff Column Base is an engineered connector from Simpson that creates a secure, code-compliant connection between an 8x8 post or column and a concrete footing. Designed for decks, patio covers, and other top-supported structures, this standoff base embeds directly in wet concrete at the time of pour and ships with the base plate pre-assembled, so your installation is straightforward from the start. The hot-dip galvanized finish makes it a dependable choice for exterior builds and projects using treated lumber, where long-term corrosion resistance is essential.

Key Features

• Includes 1/4 in. x 2 in. Strong-Drive SDS Heavy-Duty Connector screws - fasteners arrive with the base so you have everything needed on-site, and their high-capacity design allows for fast installation with a reduced reveal at the connection point.
• 1 in. standoff between post and concrete - elevates the post end above the concrete surface, meeting code requirements while reducing the potential for decay at post and column ends over time.
• Embeds in wet concrete at time of pour - sets the base at the correct position before the concrete cures, eliminating the need for additional anchoring hardware and simplifying the foundation step.
• Hot-dip galvanized finish on both the 12-gauge base and 7-gauge strap - provides extra corrosion resistance for exterior applications and direct compatibility with treated lumber, where standard coatings can degrade prematurely.
• Ships with base plate pre-assembled - reduces on-site setup time and minimizes the chance of assembly errors in the field, keeping your project moving efficiently.
• Built for 8x8 nominal column size with dual-gauge steel construction - the heavier 7-gauge strap and 12-gauge base deliver the structural capacity appropriate for load-bearing deck posts and patio cover columns.

Why This Product

• Decay protection built into the design - the 1 in. standoff keeps wood post ends from sitting in direct contact with concrete, a common source of long-term rot in outdoor structures, so your posts stay structurally sound well into the future.
• Finish rated for the toughest outdoor conditions - hot-dip galvanization offers a higher level of corrosion resistance than standard coatings, making this base a practical fit for coastal, high-humidity, and treated-lumber environments where corrosion risk is elevated.
• Faster installation without sacrificing capacity - the included Strong-Drive SDS screws are engineered for quick, high-strength connections, and the pre-assembled base plate means less prep work before the concrete is poured.
• Code-compliant standoff connection in one ready-to-use package - the 1 in. standoff meets code requirements for post-to-concrete connections, and the included fasteners and pre-assembled base deliver a complete, field-ready solution for deck and patio cover framing.

Specifications

• MPN: CBSQ88-SDS2HDG
• Brand: Simpson Strong-Tie
• Member Size: 8x8
• Width 1: 7-1/2 in.
• Width 2: 7-3/8 in.
• Depth: 6-1/8 in.
• Height: 8-11/16 in.
• Coating: Hot-Dip Galvanized
• Finish: Hot-Dip Galvanized
• Gauge: Base 12; strap 7
• Standoff Height: 1 in.
• For Treated Lumber: Yes
• Country of Origin: United States

Approved Applications

• Deck post and column bases
• Patio cover post and column bases
• Other top-supported structures requiring a post-to-concrete foundation connection
• Exterior applications requiring enhanced corrosion resistance
• Applications using treated lumber where standard finishes may degrade

What's Included

Each pack contains (1) CBSQ88-SDS2HDG Column Base, 1/4 in. x 2 in. Strong-Drive SDS Heavy-Duty Connector screws.

Downloads and Resources

• View Spec Sheet

Frequently Asked Questions

How is the CBSQ88-SDS2HDG installed - in wet or hardened concrete?

This column base embeds in wet concrete at the time of pour. Install the CBSQ with the bottom of the standoff flush to the top of the concrete surface to ensure proper placement and code compliance.

Why does this column base have a 1 in. standoff?

The 1 in. standoff between the post and the concrete surface meets code requirements and reduces the potential for decay at post and column ends by preventing direct contact between the wood and the concrete.

What fasteners are used to install the CBSQ88-SDS2HDG, and are they included?

The base installs with 1/4 in. x 2 in. Strong-Drive SDS Heavy-Duty Connector screws, which are included with the product. These screws allow for fast installation, a reduced reveal, and high load capacity.

Why is the hot-dip galvanized finish important for this column base?

Hot-dip galvanization (HDG) provides extra corrosion resistance, making this column base well-suited for exterior applications and use with treated lumber, where standard coatings may be insufficient over time.

Note: Product dimensions and/or screw or bolt holes may differ from picture. Please see item description for specifications.