Product Description
The Simpson CBST46Z CBST ZMAX Standoff Column Base is a cast-in-place column base engineered by Simpson to deliver a secure, long-lasting connection between 4x6 wood posts and concrete foundations in residential and light commercial construction. Built with a code-required 1 in. standoff and ZMAX galvanization, this post base is purpose-built to protect structural wood from moisture-related rot and corrosion in demanding exterior and treated-wood applications.
Key Features
- Code-required 1 in. standoff design - elevates the post above the concrete surface, keeping wood away from standing moisture and resisting post-end rot for a longer-lasting structural connection
- S-shaped bearing tabs - provide increased strength, allowing for higher download capacity so the connection holds up under greater structural loads
- ZMAX galvanization - delivers extra corrosion resistance beyond standard coatings, making this column base well suited for exterior environments and use with treated lumber
- Dual-gauge steel construction (base 12, strap 10) - combines a sturdy base plate with a heavier strap for added durability where it matters most
- Fits nominal 4x6 posts - designed specifically for 4x6 column sizes, ensuring a precise, code-compliant fit without guesswork
Why This Product
- Built-in moisture protection - the 1 in. standoff is not just a convenience feature; it is a code-required design element that actively separates the post end from concrete, reducing the risk of rot and extending the life of the entire structure
- Ready for treated-wood and exterior use - ZMAX galvanization is specifically engineered for the corrosive conditions associated with pressure-treated lumber and outdoor exposure, where standard galvanized finishes fall short
- Higher download capacity through smarter engineering - the S-shaped bearing tabs add meaningful structural strength, making this standoff post base a capable choice for applications where loads demand more than a basic column connector can offer
- American-made Simpson quality - produced in the United States and backed by Simpson engineering, this column base is a trusted hardware solution for contractors and builders who need reliable wood-to-concrete connections on every job
Specifications
- Model Number: CBST46Z
- Member Size: 4x6
- Width 1: 3-9/16 in.
- Width 2: 5-5/16 in.
- Depth: 7-13/16 in.
- Height: 8-11/16 in.
- Gauge: Base 12; strap 10
- Coating: ZMAX
- Finish: ZMAX
- Install With: Install with (2) 5/8 in. diameter machine bolts (sold separately)
- Country of Origin: United States
Frequently Asked Questions
- What is the purpose of the 1 in. standoff design on the CBST46Z?
- The code-required 1 in. standoff design elevates the wood post above the concrete surface, protecting it from moisture exposure and resisting post-end rot for a longer-lasting structural connection.
- What post size is the CBST46Z designed to fit?
- The CBST46Z is designed for a nominal column size of 4x6.
- What hardware is needed to install the CBST46Z?
- The CBST46Z should be installed with (2) 5/8 in. diameter machine bolts.
- Why does the CBST46Z feature ZMAX galvanization?
- ZMAX galvanization provides extra corrosion resistance, making the CBST46Z well suited for exterior applications and use with treated wood where standard coatings may not offer sufficient protection.
Note: Product dimensions and/or screw or bolt holes may differ from picture. Please see item description for specifications.
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