The Simpson 6X Post Cap in ZMAX finish is an 18-gauge steel post cap from Simpson designed to create a strong, reliable mechanical connection between a nominal 6x post and a wood deck beam or patio cover framing. Built for light cap applications where top support is provided, it outperforms angled nailing and screw fastening by distributing load through a positive bracketed connection - protecting the post from splitting and eliminating the weakness of end-grain fastening. ZMAX galvanization delivers enhanced corrosion resistance that stands up to exterior conditions and direct contact with pressure-treated lumber.

Key Features

• Positive mechanical post-to-beam connection - secures the post to the wood deck framing with greater structural reliability than angled nailing or screw fastening alone
• Reduces post splitting and eliminates end-grain nailing - the bracketed design spreads load away from vulnerable end grain, helping preserve the integrity of the post over time
• 18-gauge steel construction - provides the structural rigidity needed for dependable performance in light cap applications
• ZMAX galvanization - adds an extra layer of corrosion protection beyond standard galvanizing, making this post cap well-suited for outdoor decks, patio covers, and treated-wood framing environments
• Sized for nominal 6x lumber - fits standard 6x posts used in deck and patio cover framing, ensuring a consistent, properly fitted connection
• Installs with common fasteners - compatible with 16d common nails or 16d x 2 1/2 in. joist hanger nails for a straightforward installation process
• Top-supported applications only - engineered specifically for top-supported post cap use, so you can be confident it is applied in the structural context it was designed and rated for

Why This Product

• A stronger alternative to traditional fastening methods - unlike angled nailing or screw connections, this post cap creates a positive mechanical link between post and beam, reducing the risk of post splitting and delivering a more dependable structural connection for decks and patio covers
• Built to resist the harsh conditions of exterior and treated-wood construction - ZMAX galvanization goes beyond standard corrosion protection, making this cap a practical choice for outdoor framing projects where contact with pressure-treated lumber or moisture is unavoidable
• A trusted connector for deck and patio cover framing - the BC series dual-purpose design is purpose-built for light cap applications in top-supported installations, giving builders and DIYers a code-conscious connection solution sized specifically for 6x posts
• Domestic manufacturing and proven engineering from Simpson - made in the United States and backed by Simpson's reputation for structural connector performance, this post cap brings confidence to any 6x post-to-beam connection on a wood deck or covered patio structure

Specifications

• MPN: BC6Z
• Member Size: 6x
• Width 1: 5-1/2 in.
• Width 2: 5-1/2 in.
• Length 1: 4-3/8 in.
• Length 2: 4-3/8 in.
• Height 1: 3-3/8 in.
• Height 2: 3-3/8 in.
• Gauge: 18
• Coating/Finish: ZMAX
• Install With: 16d common nails or 16d x 2 1/2" joist hanger nails (sold separately)
• Country of Origin: United States

Approved Applications

• Connecting posts to beams on wood decks
• Patio cover post-to-beam connections
• Light-duty post cap applications where top support is provided
• Exterior and treated-wood construction environments requiring enhanced corrosion resistance

Downloads and Resources

• View Spec Sheet

Frequently Asked Questions

What size post is the BC6Z designed for?

The BC6Z is designed for a nominal 6x post size, making it suitable for standard 6x lumber used in deck and patio cover framing.

Why is the BC6Z stronger than angled nailing or screw fastening?

The BC6Z creates a positive mechanical connection that distributes load more effectively across the post and beam, reducing the chance of post splitting and eliminating the need to nail into end grain, which is inherently weaker than a properly bracketed connection.

What makes ZMAX galvanization suitable for exterior and treated-wood applications?

ZMAX galvanization provides an extra layer of corrosion resistance beyond standard galvanizing, making the BC6Z well-suited for outdoor environments and direct contact with pressure-treated lumber, which can accelerate corrosion in lesser-coated connectors.

Can the BC6Z be used for fences or unbraced carports?

No. The BC6Z is not recommended for non top-supported installations such as fences or unbraced carports. It is intended for applications where the post is top-supported, such as wood decks and patio covers.