The Simpson ABU88Z Adjustable Standoff Post Base from Simpson Strong-Tie is engineered to securely connect 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, helping prevent moisture-related rot while meeting code requirements for posts installed in basements or locations exposed to weather or water splash. A slotted anchor hole provides on-site adjustability for precise post placement, and ZMAX galvanization delivers extra corrosion resistance that makes this post base well suited for exterior installations and use with treated lumber. Designed for maximum uplift performance, this adjustable post base is a dependable, cost-effective solution for residential and commercial construction where wind or seismic loading is a structural concern.

Key Features

• Slotted anchor hole for adjustability - allows flexibility around the anchor bolt position, so you can achieve precise post alignment even when working with existing concrete that may not be perfectly laid out
• Built-in 1 in. standoff - elevates the post end above the concrete surface to help prevent rot and meets code requirements for structural posts in basements or areas subject to weather or water splash
• Increased uplift load capacity - engineered to resist the elevated forces associated with earthquake and high-wind conditions, making this post base appropriate for seismic and wind-zone construction
• ZMAX galvanized coating - provides extra corrosion resistance beyond standard galvanizing, keeping the connector protected in exterior environments and when paired with pressure-treated wood
• Base 14-gauge steel with 12-gauge strap - heavier strap gauge contributes to the high uplift performance needed in demanding structural connections
• Multiple fastener options - attaches to the post with nails, Strong-Drive SD Connector screws, or bolts, giving installers flexibility to match the fastening method to the application

Why This Product

• Code-compliant standoff protection - the 1 in. standoff design satisfies code requirements for posts in moisture-prone or weather-exposed locations, reducing the risk of costly rot damage over the life of the structure
• Built for high-demand structural applications - the combination of a heavy-gauge strap and a design optimized for maximum uplift performance makes this post base a reliable choice where earthquake or wind loading requirements must be met
• Installer-friendly adjustability - the slotted base takes the guesswork out of aligning posts to existing anchor bolts, saving time and reducing the chance of costly placement errors on the job site
• Long-term durability in tough conditions - ZMAX galvanization is specifically suited for exterior and treated-wood applications where standard hardware would be vulnerable to accelerated corrosion, helping the connector maintain structural integrity over time

Specifications

• MPN: ABU88Z
• Brand: Simpson Strong-Tie
• Nominal Post Size: 8x8
• Width: 7 in.
• Length: 7-1/2 in.
• Height: 7 in.
• Coating: ZMAX
• Finish: ZMAX
• Gauge: Base 14; Strap 12
• Install With: 0.162 in. x 3-1/2 in. nails (sold separately)
• Country of Origin: United States

Frequently Asked Questions

What is the purpose of the 1-in. standoff on the ABU88Z post base?

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

Why does the ABU88Z have a slotted anchor hole?

The slot in the base enables flexibility around the anchor bolt, making precise post placement easier. This adjustable feature is especially useful when attaching wooden posts to existing concrete where anchor bolt positioning may not be perfectly precise.

What makes ZMAX galvanization beneficial for this post base?

ZMAX galvanization offers extra corrosion resistance compared to standard galvanizing, making the ABU88Z well suited for exterior applications and use with treated wood, where standard hardware could be susceptible to accelerated corrosion over time.

Is the ABU88Z suitable for high-wind or seismic applications?

Yes. The ABU88Z is designed to provide increased uplift load capacity, making it appropriate for applications where earthquake or wind loading is a structural concern. Its high capacity design supports maximum uplift performance at the post-to-foundation connection.

Note: Product dimensions may differ from picture.