The Simpson APVB66 Avant Ornamental Post Base is a black powder-coated post base engineered for 6x6 nominal posts used in outdoor structures such as pergolas, patio covers, and other top-supported applications. Built from 12-gauge steel with ZMAX galvanization and a black powder-coat finish, this post base delivers superior corrosion resistance for exterior and treated-wood use while maintaining a clean, simple aesthetic that complements a wide range of architectural styles. A 1-inch standoff elevates the post end above the concrete surface to help prevent moisture-related rot, and slotted holes allow for on-site adjustability during installation. Part of Simpson's Outdoor Accents Avant Collection, this post base pairs structural performance with a refined, ornamental appearance suited to visible outdoor applications.

Key Features

• Designed to meet stringent building codes for seismic or high-wind events - gives you confidence that your pergola, patio cover, or other top-supported structure is anchored to a code-compliant standard in demanding conditions.
• Slotted for adjustability - allows fine-tuning of post position during installation, reducing the need for costly corrections on site.
• 1-inch standoff from the concrete surface - creates a gap that helps prevent moisture from accumulating at the post end, directly reducing the risk of rot over the life of the structure.
• Fastener holes are slightly offset - helps prevent fastener interference during installation, making assembly cleaner and more reliable.
• Made from 12-gauge steel with ZMAX galvanization and black powder-coat finish - provides two layers of corrosion protection specifically suited for exterior environments and pressure-treated lumber applications.
• Compatible with Outdoor Accents side plates (APVBDSP, sold separately) - lets you achieve a more finished, decorative look on exposed post bases without switching to a different hardware system.
• Installed with STN22 hex-head washers and SDWS22312DBB structural wood screws - pairs with matching Outdoor Accents fasteners so hardware finishes stay consistent throughout your project.

Why This Product

• Structural reliability meets ornamental design - the Avant Collection post base is engineered to satisfy code requirements for seismic and high-wind conditions while delivering a clean, simple profile that looks intentional on visible outdoor structures like pergolas and patio covers.
• Two-layer corrosion protection built for the outdoors - ZMAX galvanization combined with a black powder-coat finish means this post base is specifically designed to hold up in exterior environments and alongside pressure-treated lumber, not just tolerate them.
• Built-in rot prevention at the post-to-concrete connection - the 1-inch standoff addresses one of the most common failure points in outdoor post installations by keeping the post end clear of surface moisture from the start.
• Expandable with matching decorative hardware - optional Outdoor Accents side plates and coordinating fasteners allow you to extend the same finish and visual system across the entire structure, keeping your project looking cohesive without sourcing mismatched components.

Specifications

• MPN: APVB66
• Member Size: 6x6
• Width: 5-1/2 in.
• Height: 6-13/16 in.
• Gauge: 12
• Coating: ZMAX
• Finish: ZMAX Galvanized with Black Powder Coat
• Country of Origin: United States

Approved Applications

• Pergolas
• Patio covers
• Other top-supported outdoor structures
• Exterior and treated-wood applications
• Seismic or high-wind construction environments requiring code compliance

Downloads and Resources

• View Spec Sheet

Frequently Asked Questions

What fasteners are required to install the APVB66 post base?

Install with (4) STN22 Outdoor Accents hex-head washers and (4) SDWS22312DBB Outdoor Accents structural wood screws. A 5/8-inch concrete anchor is also required. Note that these fasteners and anchors are not included with the post base.

How does the APVB66 help protect against post-end rot?

The APVB66 features a 1-inch standoff that elevates the post end above the concrete surface. This gap helps prevent moisture from accumulating at the base of the post, reducing the risk of rot over time.

Is the APVB66 suitable for use with pressure-treated lumber?

Yes. The ZMAX galvanization combined with the black powder-coat finish provides extra corrosion resistance specifically suited for exterior and treated-wood applications, making it compatible with pressure-treated lumber commonly used in outdoor structures.

Can decorative side plates be added to the APVB66 for a more finished appearance?

Yes. Outdoor Accents side plates are available separately and are compatible with this post base. See for the matching side plate option.

Related Products

• SDWS22312DBB Screws
• STN22 Washers
• Concrete Anchors
• Simpson Strong-Tie Outdoor Accents

Note: The structural screws, hex head washers, and concrete anchors are not included.