The Simpson CBSQ88-SDS2 CBSQ Standoff Column Base is a galvanized post base engineered to create a strong, code-compliant connection between a nominal 8x8 post or column and a concrete foundation. Built by Simpson for decks, patio covers, and other top-supported structures, this column base embeds directly into wet concrete at the time of pour and ships with its base plate pre-assembled alongside included 1/4 in. x 2 in. Strong-Drive SDS Heavy-Duty Connector screws - so contractors and serious DIYers can move from pour to post installation without sourcing additional hardware.

Key Features

• Includes Strong-Drive SDS Heavy-Duty Connector screws - allows for fast installation, reduced reveal, and high load capacity right out of the box, with no separate fastener purchase required.
• 1 in. standoff between post and concrete - meets code requirements and keeps the post end elevated above the slab surface, directly reducing the potential for moisture-related decay at post and column ends.
• Embeds in wet concrete at time of pour - integrates into new concrete foundations during the pour for a permanent, structurally sound anchor point without the need for post-installed anchors.
• Shipped with base plate pre-assembled - eliminates on-site assembly steps, saving time and reducing the chance of installation error.
• Dual-gauge steel construction (12-gauge base, 7-gauge strap) - pairs a robust base plate with a heavier strap where structural demands are greatest, balancing material efficiency with load performance.
• G90 zinc galvanized finish - provides an extra layer of corrosion resistance well-suited to outdoor applications such as deck construction and patio covers where exposure to weather and moisture is ongoing.

Why This Product

• A complete, hardware-included solution - the included Strong-Drive SDS screws mean everything needed for a fast, high-capacity post-to-concrete connection arrives in one package, eliminating a trip to the fastener aisle mid-project.
• Built-in moisture protection through standoff design - the 1 in. gap between post end and concrete surface actively reduces the decay risk that comes with direct wood-to-concrete contact, extending the service life of structural columns in exposed outdoor settings.
• Wet-pour compatibility for new construction - embedding directly into fresh concrete creates a monolithic connection that is ideal for deck footings and patio cover foundations being built from the ground up.
• Corrosion-resistant finish for long-term outdoor performance - the G90 galvanized coating makes this column base a practical choice for structures in environments prone to moisture, water splash, or seasonal weather exposure.

Specifications

• Manufacturer Part Number (MPN): CBSQ88-SDS2
• 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: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• Gauge: Base 12; strap 7
• Standoff Height: 1 in.
• Install With: 1/4 in. x 2 in. Strong-Drive SDS Heavy-Duty Connector screws (included)
• Country of Origin: United States

Approved Applications

• Deck construction requiring post-to-concrete connections
• Patio covers and other top-supported structures
• Structural posts installed in areas exposed to weather or water splash
• New concrete pours - embeds in wet concrete at time of pour

What's Included

Each pack contains (1) CBSQ88-SDS2 Column Base, 1/4 in. x 2 in. Strong-Drive SDS Heavy-Duty Connector screws.

Downloads and Resources

• View Spec Sheet

Frequently Asked Questions

What size post or column is the CBSQ88-SDS2 designed for?

The CBSQ88-SDS2 is designed for a nominal 8x8 post or column, providing a secure base connection for that specific member size.

What type of concrete installation does this column base support?

This column base embeds in wet concrete at the time of pour, making it suitable for new concrete foundation applications.

Why does the CBSQ88-SDS2 use a standoff design?

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 minimizing direct contact with moisture.

What fasteners are used to install the CBSQ88-SDS2, and are they included?

The CBSQ88-SDS2 installs with 1/4 in. x 2 in. Strong-Drive SDS Heavy-Duty Connector screws, which are included with the base. These screws allow for fast installation, reduced reveal, and high load capacity.

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