The Simpson ACH6Z Adjustable Post Cap from Simpson is a heavier-capacity, two-piece structural connector engineered to create a secure, load-rated connection between a beam and a post on a nominal 6x member. Built from 16-gauge steel with ZMAX galvanization, it is designed for both new construction and retrofit applications where medium- to high-capacity uplift resistance is required - and its adjustable design supports either mid-beam or end-beam connections, giving builders the flexibility to handle a wide range of framing conditions in exterior or treated-wood environments.

Key Features

• Flanges can be field bent for end-beam conditions (bend one time only) - allows the same cap to adapt to end-beam framing situations on site without requiring a separate connector, saving time and material cost.
• Load rated when installed in pairs - gives structural assurance that the connection meets rated load values when the connector is used as designed, supporting confident specification by builders and engineers.
• Compatible with Strong-Drive SD Connector screws for increased loads - upgrading from nails to #10 x 2-1/2 in. Strong-Drive SD screws boosts load capacity, making this cap adaptable to higher-demand structural applications.
• Made from 16-gauge steel - heavier-gauge construction delivers the strength and rigidity needed for medium- to high-capacity uplift loads in demanding structural connections.
• ZMAX galvanization for extra corrosion resistance - the enhanced coating holds up against moisture and the chemicals present in treated lumber, making this post cap a dependable choice for exterior decks, pergolas, and other outdoor framing projects.
• Two-piece adjustable design - simplifies installation in both new construction and retrofit scenarios where a rigid, fixed cap would be difficult or impossible to fit.

Why This Product

• Built for versatility in real-world framing conditions - the adjustable, two-piece construction and field-bendable flanges mean one connector handles mid-beam and end-beam connections alike, reducing the number of SKUs a contractor needs to carry for a 6x post application.
• Engineered for exterior and treated-wood durability - ZMAX galvanization provides a higher level of corrosion protection than standard galvanized finishes, directly addressing the long-term performance concerns that come with outdoor structural connections exposed to moisture and preservative-treated lumber chemicals.
• Scalable load performance through fastener choice - the ability to install with either nails or Strong-Drive SD Connector screws lets the user dial in the required load rating for the specific project, offering medium- to high-capacity uplift performance without switching to a different connector family.
• Trusted construction from a recognized structural connector brand - made in the United States from 16-gauge steel, the ACH6Z reflects the quality standards that structural contractors, engineers, and inspectors rely on for post-and-beam framing in both residential and light commercial settings.

Specifications

• Model Number: ACH6Z
• Brand: Simpson Strong-Tie
• Gauge: 16
• Coating/Finish: ZMAX
• Nominal Post Size: 6x
• Post-Cap Inner Width: 5-1/2 in.
• Install With: (40) 0.162 in. x 2-1/2 in. nails or (40) #10 x 2-1/2 in. Strong-Drive SD screws (sold separately)
• Width: 5-1/2 in.
• Length: 8-1/2 in.
• Country of Origin: United States

Frequently Asked Questions

What post size is the ACH6Z designed to fit?

The ACH6Z is designed for a nominal 6x post size, with a post-cap inner width of 5-1/2 in. to accommodate standard 6x lumber dimensions.

Can the ACH6Z be used for both mid-beam and end-beam connections?

Yes. The ACH6Z allows for either mid-beam or end-beam connections. When an end-beam condition is required, the flanges can be field bent - however, they should only be bent one time to maintain structural integrity.

Is the ACH6Z suitable for exterior or treated-wood applications?

Yes. The ACH6Z features ZMAX galvanization, which offers extra corrosion resistance, making it well-suited for exterior and treated-wood applications where moisture and chemical exposure are concerns.

Does installing the ACH6Z with Strong-Drive SD Connector screws provide any performance advantage?

Yes. The ACH6Z can be installed with Strong-Drive SD Connector screws - specifically #10 x 2-1/2 in. Strong-Drive SD screws - which can provide increased load capacity compared to standard nail installation. The connector is load rated when installed in pairs.