The Simpson CC66HDG CC Hot-Dip Galvanized Column Cap for 6x Beam, 6x Post by Simpson is engineered to deliver strong, reliable column-beam connections in wood construction. The seat of the column cap provides an additional surface area of bearing that extends beyond each side of the column, helping to distribute the load from the beam and provide critical support for the connection. Built from 7-gauge steel with a hot-dip galvanized finish, this column cap is built to perform in demanding exterior and treated-wood applications where corrosion resistance is essential.

Key Features

• Certified welds - provide confidence in strength and loading so you can trust the connection meets structural expectations.
• Increased uplift load capacity - engineered to handle elevated forces from earthquake or wind loading, making this cap suitable for high-demand structural environments.
• Bolt spacing that meets NDS code requirements - ensures optimal performance and helps simplify the inspection and permitting process.
• Diamond holes - allow for temporary fastening during installation, keeping the cap securely positioned before final bolting.
• 7-gauge steel construction - delivers the structural thickness needed to support heavy 6x beam and 6x post connections with confidence.
• Hot-dip galvanized finish - offers extra corrosion resistance compared to standard coatings, making this column cap well suited for exterior use and pressure-treated lumber applications where moisture exposure is a concern.
• Fits nominal 6x beam width and nominal 6x post size - purpose-sized for standard 6x6 post and 6x beam assemblies, eliminating guesswork when selecting the correct cap for your project.

Why This Product

• Built for exterior and treated-wood conditions - the hot-dip galvanized coating provides a higher level of corrosion protection than standard finishes, making this post cap a dependable choice for decks, pergolas, and other outdoor structural applications exposed to moisture or treated lumber chemicals.
• Engineered for load distribution and structural integrity - the extended bearing seat design spreads the beam load across a greater surface area beyond each side of the post, reducing stress concentrations and supporting long-term connection performance.
• Designed to perform in seismic and high-wind zones - with uplift loads increased for earthquake or wind loading, this column cap addresses the heightened demands placed on structural connections in regions with strict building code requirements.
• Code-compliant bolt spacing and certified welds - engineered to meet NDS code requirements right out of the box, this cap helps contractors and builders stay on schedule without having to modify fastener layouts or question weld quality during inspections.

Specifications

• MPN: CC66HDG
• Brand: Simpson Strong-Tie
• Member Size: 6x Beam, 6x Post
• Nominal Beam Width: 6x
• Beam Width: 5-1/4 in. or 5-1/2 in.
• Width 1: 5-1/2 in.
• Width 2: 5-1/2 in.
• Length 1: 11 in.
• Height 1: 6-1/2 in.
• Nominal Post Size: 6x
• Gauge: 7-gauge steel
• Coating/Finish: Hot-Dip Galvanized (HDG)
• Installation Fasteners: Install with (6) 5/8-in. diameter HDG bolts (sold separately)
• Country of Origin: United States

Options

• Contact us for Configurable Options and Special orders
• Straps may be rotated 90 deg.
• For special, custom, or rough-cut lumber sizes, provide dimensions. An optional W2 dimension may be specified. (The W2 dimension on straps rotated 90 deg. is limited by the W1 dimension.)

Frequently Asked Questions

What post and beam sizes is the CC66HDG designed to fit?

The CC66HDG is designed for a nominal 6x beam width and a nominal 6x post size, making it the correct column cap for standard 6x6 post and 6x beam connections in wood construction.

Why is the hot-dip galvanized finish important for this column cap?

Hot-dip galvanization (HDG) provides an extra layer of corrosion resistance compared to standard zinc plating, making the CC66HDG well suited for exterior applications and use with pressure-treated lumber where moisture and chemical exposure can accelerate corrosion.

How is the CC66HDG installed, and what fasteners are required?

The CC66HDG is installed using (6) 5/8-in. diameter HDG bolts. The bolt spacing is designed to meet NDS code requirements, and diamond holes are included to allow for temporary fastening during installation before final bolting.

What makes the CC66HDG suitable for use in high-wind or seismic zones?

The CC66HDG features certified welds and uplift loads that have been increased specifically to address earthquake and wind loading demands, providing enhanced structural performance in areas subject to these forces.

Note: Product dimensions and/or screw/bolt holes may differ from picture.