Simpson Strong-Tie CBST44Z CBST ZMAX Standoff Column Base for 4x4 is a cast-in-place column base engineered by Simpson Strong-Tie to provide a secure and durable connection between wood posts and concrete foundations in residential and light commercial construction. Its code-required 1 in. standoff design elevates the post above the concrete surface, significantly reducing moisture-related post-end rot while delivering increased download capacity and long-lasting structural performance in demanding exterior and treated-wood environments. Key Features Code-required 1 in. standoff design that elevates the post above the concrete, protecting it from moisture and resisting rot S-shaped bearing tabs that provide increased strength, allowing for higher downloads Nominal column size: 4x4 Steel gauge: base 12, strap 10 ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications Specifications Model Number: CBST44Z Member Size: 4x4 Width 1: 3-9/16 in. Width 2: 3-1/2 in. Depth: 7-1/8 in. Height: 8-3/8 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 Why does the CBST44Z have a 1 in. standoff design? The code-required 1 in. standoff elevates the wood post above the concrete surface, creating an air gap that protects the post end from direct moisture contact and significantly reduces the risk of post-end rot over time. What is ZMAX galvanization and why does it matter? ZMAX is a thicker zinc coating applied to the steel that provides extra corrosion resistance compared to standard galvanization. This makes the CBST44Z especially well suited for exterior applications and use with treated lumber, where exposure to moisture and corrosive preservatives is a concern. What hardware is required to install the CBST44Z? Install with (2) 5/8 in. diameter machine bolts. These bolts anchor the base into the concrete during the cast-in-place installation process. What do the S-shaped bearing tabs do? The S-shaped bearing tabs are a structural feature that provides increased strength to the connection, allowing the CBST44Z to handle higher download loads compared to simpler flat-tab designs, making it suitable for demanding residential and light commercial construction applications. Note: Product dimensions and/or screw or bolt holes may differ from picture. Please see item description for specifications.
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