The Simpson APB66R Ornamental Rough 6x6 Post Base is part of the Simpson Outdoor Accents Mission Collection, engineered to anchor rough cut 6x6 posts and columns securely to concrete for outdoor structures including pergolas, patio covers, and other top-supported builds. Built from 12-gauge steel with a ZMAX galvanized finish topped by a black powder coat, this post base pairs serious corrosion resistance with decorative appeal - making it equally at home in demanding exterior environments and polished outdoor living spaces. A built-in 1 in. standoff elevates the post end above the concrete surface to help guard against moisture-related rot over time.

Key Features

• Designed to meet stringent building codes for seismic or high-wind events - gives buyers confidence that the connection meets enhanced structural performance requirements in challenging climate zones.
• Slotted for adjustability - allows minor positioning corrections during installation so posts can be set precisely without starting over.
• 1 in. standoff from the concrete surface - keeps the post end elevated and away from standing moisture, directly reducing the risk of rot for long-term outdoor durability.
• Fastener holes are slightly offset - helps prevent fastener interference during installation, making the process cleaner and reducing the chance of split wood or misaligned hardware (fasteners sold separately).
• Fits nominal post size 6x6 rough - designed specifically for rough cut 6x6 lumber with actual 6 in. x 6 in. dimensions, ensuring a proper structural fit.
• 12-gauge steel construction - provides a solid, rigid base capable of handling the load demands typical of pergolas, patio covers, and similar top-supported structures.
• ZMAX galvanization with black powder coat - delivers extra corrosion resistance suited for exterior and treated-wood applications where standard finishes may fall short.
• Compatible with Outdoor Accents side plates (see APBDSP) - allows buyers to extend the decorative look of the Mission Collection for a cohesive finished appearance on visible post bases.

Why This Product

• Form and function in one fitting - the black powder-coat finish over ZMAX galvanization means this post base resists corrosion in harsh outdoor conditions while also providing a refined, decorative look suited for visible pergola and patio cover installations.
• Built for code-compliance where it matters most - the APB66R is engineered to meet stringent building codes for seismic and high-wind events, making it a dependable choice for projects in regions with demanding structural requirements.
• Rot protection is built into the design - the 1 in. standoff is not an accessory or add-on; it is an integrated feature that keeps post ends clear of surface moisture, extending the service life of the post and the overall structure.
• Part of a coordinated outdoor hardware system - designed to install with Simpson Outdoor Accents hex-head washers and structural wood screws, and expandable with matching Outdoor Accents side plates, so the entire post base assembly maintains a consistent, intentional look.

Specifications

• Model Number (MPN): APB66R
• Member Size: 6x6 rough
• Gauge: 12
• Width: 6 in.
• Length: 5 in.
• Height: 7-1/4 in.
• Coating: ZMAX
• Finish: ZMAX Galvanized with Black Powder Coat
• Country of Origin: United States

Approved Applications

• Pergolas
• Patio covers
• Top-supported outdoor structures
• Exterior and treated-wood applications
• Seismic and high-wind zones where stringent building codes apply

Frequently Asked Questions

What lumber size does the APB66R fit?

The APB66R is designed specifically for rough cut 6x6 lumber, meaning the post must have an actual measured dimension of 6 inches by 6 inches. It is not compatible with nominal 6x6 lumber, which typically measures 5-1/2 in. x 5-1/2 in. If you have a nominal post, see the APB66 instead.

What fasteners are required to install the APB66R?

Install with (4) STN22 Washers, (4) SDWS22312DBB Screws, and (1) 5/8 in. Concrete Anchors. Fasteners are sold separately.

Why does the APB66R have a 1-inch standoff?

The 1 in. standoff keeps the base of the post elevated above the concrete surface, which helps prevent moisture from accumulating at the post end and reduces the risk of rot over time - an important benefit for outdoor applications exposed to the elements.

Is the APB66R suitable for high-wind or seismic regions?

Yes. The APB66R is designed to meet stringent building codes for seismic or high-wind events, making it appropriate for use in areas where enhanced structural performance requirements apply.

Related Products

• - Post base for nominal 6x6 lumber (5-1/2 in. x 5-1/2 in. actual)
• - Outdoor Accents structural wood screws
• - Outdoor Accents hex-head washers
• - 5/8 in. anchors for concrete installation
• - Outdoor Accents decorative post base side plates
• Simpson Strong-Tie Outdoor Accents - Complete collection

Note: This connector is designed for rough cut lumber, NOT nominal lumber (most common). This will only fit a post that measures an actual 6 in. x 6 in. If you have a nominal post measuring 5-1/2 in. x 5-1/2 in., you will need the ornamental post base.