The Simpson ABU5-6Z ABU ZMAX Galvanized Adjustable Standoff Post Base is a heavy-duty connector from Simpson engineered to attach wooden posts to existing concrete in high-capacity structural applications. Its built-in 1 in. standoff keeps the post end elevated above the concrete surface to help prevent rot, while the slotted anchor hole and adjustable design make precise post positioning straightforward even when anchor bolt placement is not perfect. ZMAX galvanization delivers extra corrosion resistance beyond standard galvanized coatings, making this post base a cost-effective and dependable choice for exterior installations and treated-wood environments where maximum uplift performance is required.

Key Features

• Slotted anchor hole in the base - allows flexibility around the anchor bolt so you can fine-tune post placement without being locked into a single fixed position, saving time on tricky installations
• 1 in. standoff design - keeps the post end elevated off the concrete to help prevent moisture-related rot, and meets code requirements for structural posts in basements or areas exposed to weather or water splash
• Engineered for high-capacity uplift performance - accommodates increased uplift loads caused by earthquake or wind forces, giving builders confidence in safety-critical connections
• ZMAX galvanized coating - provides extra corrosion resistance compared to standard galvanized finishes, making this post base well suited for exterior use and applications involving treated lumber
• Multiple fastening options - installs with 0.162 in. x 3-1/2 in. nails, Strong-Drive SD Connector screws, or 1/2 in. diameter machine bolts, offering flexibility to match your fastening method to the application
• Base 12 gauge, strap 10 gauge steel construction - heavy steel gauges provide the structural strength needed for demanding, high-load post-to-concrete connections

Why This Product

• Built for larger engineered lumber posts - sized specifically for 5-1/8 in. x 6 in. engineered lumber, this adjustable post base is designed for the heavy structural loads that come with larger post applications, making it a purpose-built fit rather than a compromise
• Rot prevention and code compliance in one design - the integrated 1 in. standoff addresses two real concerns at once: keeping post ends dry to resist decay and satisfying code requirements for posts in basements or weather-exposed locations
• Corrosion resistance where it matters most - the ZMAX finish is specifically suited for exterior conditions and contact with treated wood, helping the connector hold up in the environments where standard coatings tend to fall short
• Adjustability reduces installation headaches - the slotted base design means minor anchor bolt misalignments do not require concrete work or compromise structural positioning, translating directly to time and cost savings on the job site

Specifications

• MPN: ABU5-6Z
• Brand: Simpson Strong-Tie
• Nominal Post Size: 5-1/8 in. x 6 in.
• Width: 5 in.
• Length: 6-1/8 in.
• Height: 6-1/16 in.
• Hole Bottom: 1-3/4 in.
• Coating: ZMAX
• Finish: ZMAX
• Steel Gauge: Base 12; Strap 10
• Install With: 0.162 in. x 3-1/2 in. nails or 1/2 in. diameter machine bolts (sold separately)
• Country of Origin: United States

Frequently Asked Questions

What size post is the ABU5-6Z designed for?

The ABU5-6Z is specifically designed for 5-1/8 in. x 6 in. engineered lumber posts, making it well suited for larger structural and high-capacity post applications.

Why does the ABU5-6Z include a 1-in. standoff?

The built-in 1-in. standoff helps prevent rot at the end of the post by keeping it elevated away from the concrete surface. This design also meets code requirements for structural posts installed in basements or in areas exposed to weather or water splash.

What fasteners are used to install the ABU5-6Z?

The ABU5-6Z can be installed with 0.162 in. x 3-1/2 in. nails or 1/2 in. diameter machine bolts. It also accommodates Strong-Drive SD Connector screws, offering flexibility depending on your application requirements.

Why is ZMAX galvanization important for this post base?

ZMAX galvanization provides extra corrosion resistance compared to standard galvanized coatings, making the ABU5-6Z especially suitable for exterior installations and applications involving treated wood, where exposure to moisture and corrosive environments is a concern.

Note: Product dimensions may differ from picture. See item description for specifications.