The Simpson Rough 8x8 Adjustable Standoff Post Base is a Simpson Strong-Tie engineered connector built to secure large 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 allows for on-site adjustability during installation. Finished with ZMAX galvanization for enhanced corrosion resistance, this post base is designed to meet code requirements and deliver maximum uplift performance in both interior and exterior environments - making it a dependable, cost-effective choice for decks, porches, carports, and other load-bearing post applications.

Key Features

• Slotted anchor hole in the base - allows flexibility around the anchor bolt so you can fine-tune post positioning during installation, reducing the need for costly adjustments
• Built-in 1 in. standoff design - keeps the post end elevated above the concrete surface to help prevent rot and meets code requirements for structural posts in basements or areas exposed to weather or water splash
• Engineered for increased uplift loads - provides enhanced resistance to earthquake and wind forces, giving you confidence in the connection's performance under demanding conditions
• ZMAX galvanized finish - delivers extra corrosion resistance beyond standard galvanization, making this post base well suited for exterior installations and use with pressure-treated lumber
• Compatible with multiple fastener types - attaches to the post with nails, Strong-Drive SD Connector screws, or bolts, giving installers flexibility to suit the application
• Base 14-gauge steel with 12-gauge strap construction - heavier strap gauge contributes to the connector's high-capacity uplift and load performance

Why This Product

• Rot prevention built into the design - the 1 in. standoff is not an add-on but a core feature of the connector, passively protecting the post end from moisture contact at the concrete surface without any extra hardware or steps
• Adjustability that saves time on the job - the slotted base hole lets you work around existing anchor bolts and dial in post placement precisely, which is especially valuable when retrofitting posts onto existing concrete foundations
• Rated for high-capacity and high-hazard applications - the increased uplift load capacity makes this post base a strong fit for structures in seismic or high-wind regions where connection performance is critical
• ZMAX coating for long-term durability with treated wood - standard galvanized hardware can degrade when in contact with today's preservative-treated lumber, and the ZMAX finish is specifically suited to resist that accelerated corrosion in exterior and ground-level installations

Specifications

• MPN: ABU88RZ
• Brand: Simpson Strong-Tie
• Nominal Post Size: Rough 8x8
• Width: 7 in.
• Length: 8 in.
• Height: 6-3/4 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 ABU88RZ?

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

Why does the ABU88RZ have a slotted anchor hole?

The slot in the base enables flexibility around the anchor bolt, making precise post placement easier during installation. This adjustability is especially useful when working around existing anchor bolts in concrete.

Is the ABU88RZ suitable for exterior or treated-wood applications?

Yes. The ZMAX galvanization provides extra corrosion resistance, making the ABU88RZ well suited for exterior applications and use with treated wood where standard galvanization may not provide sufficient protection.

What fasteners are used to attach the ABU88RZ to a post?

The ABU88RZ attaches to the post using 0.162 in. x 3-1/2 in. nails. It can also be attached with Strong-Drive SD Connector screws or bolts depending on the application requirements.

Note: Product dimensions may differ from picture.