The Simpson CBSTQ46Z-SDS2 CBSTQ ZMAX Standoff Column Base is a cast-in-place column base engineered by Simpson to deliver enhanced strength and stability for 4x6 wood posts in residential and light commercial construction. Built around a code-required 1 in. standoff design and finished with ZMAX galvanization for superior corrosion resistance, this column base provides a dependable, high-performance connection between wood posts and concrete foundations - helping builders meet code requirements while protecting structural integrity over the long term.

Key Features

• Code-required 1 in. standoff design - elevates the post above the concrete surface to prevent direct moisture contact, significantly reducing the risk of post-end rot and extending the service life of the connection
• S-shaped bearing tabs - provide increased strength, allowing the base to handle higher download loads for reliable performance in demanding structural applications
• Includes 14 Strong-Drive SDS Heavy-Duty Connector screws (1/4 in. x 2 in.) - provide a greater wood net section area than bolts, preserving more of the post's structural integrity at the connection point so installation is straightforward right out of the box
• ZMAX galvanization - offers extra corrosion resistance specifically suited for exterior applications and use with pressure-treated lumber, keeping the connector protected in harsh environments
• Dual-gauge steel construction (base 12, strap 10) - combines appropriately heavy-gauge components where load demands are greatest, supporting the high capacities needed for wood post-to-concrete connections
• Made in the United States - engineered and produced domestically to consistent quality standards for residential and light commercial structural hardware

Why This Product

• Moisture protection built into the design - the 1 in. standoff is not just a convenience feature; it is a code-required element that keeps the wood post clear of concrete and standing water, directly addressing one of the most common causes of structural post failure in outdoor and ground-level applications
• Higher load capacity without the trade-offs - the S-shaped bearing tabs and included SDS screws work together to allow higher downloads while preserving more of the post's net section area compared to bolt-fastened alternatives, making this base a strong performer for demanding column support needs
• Ready to install with no additional fasteners required - the 14 Strong-Drive SDS Heavy-Duty Connector screws are included in the package, so contractors and builders can complete the installation without sourcing separate hardware
• Built for treated-wood and exterior conditions - ZMAX galvanization provides extra corrosion resistance that standard finishes do not, making this column base a reliable long-term choice for decks, pergolas, covered porches, and other exterior structural connections where treated lumber and moisture exposure are factors

Specifications

• Model Number: CBSTQ46Z-SDS2
• Member Size: 4x6
• Gauge: Base 12; strap 10
• Width 1: 3-9/16 in.
• Width 2: 5-5/16 in.
• Height: 8-11/16 in.
• Depth: 7-13/16 in.
• Coating/Finish: ZMAX
• Country of Origin: United States

What's Included

Each pack contains (1) CBSTQ46Z-SDS2 ZMAX Standoff Column Base, (14) 1/4 in. x 2 in. Strong-Drive SDS Heavy-Duty Connector screws.

Frequently Asked Questions

Why does the CBSTQ46Z-SDS2 feature a 1 in. standoff design?

The 1 in. standoff elevates the wood post above the concrete surface, which is a code-required design feature that protects the post-end from direct contact with moisture, significantly reducing the risk of rot and extending the service life of the connection.

What are the S-shaped bearing tabs and why do they matter?

The S-shaped bearing tabs are structural elements built into the CBSTQ column base that provide increased strength, allowing the base to handle higher download loads compared to designs without them. This makes the CBSTQ a reliable choice for demanding residential and light commercial applications.

Why are Strong-Drive SDS screws used instead of bolts?

The included Strong-Drive SDS Heavy-Duty Connector screws provide a greater wood net section area than bolts. This means less material is removed from the wood member during fastening, preserving more of the post's structural integrity at the connection point.

Is the CBSTQ46Z-SDS2 suitable for use with pressure-treated lumber?

Yes. The ZMAX galvanization coating provides extra corrosion resistance specifically designed for exterior and treated-wood applications, making this column base well-suited for use with pressure-treated lumber where standard galvanization may not be sufficient.

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