The Simpson BC46 4x6 Post Cap from Simpson is a dual-purpose post cap and base engineered to create a secure, reliable connection between a 4x6 post and a wood deck or beam. Built from 18-gauge steel with a G90 zinc galvanized finish, this connector is stronger than angled nailing or screw fastening alone, making it a dependable choice for deck framing, patio cover construction, and other light-duty structural applications where a positive mechanical connection is required.

Key Features

• Positive post-to-deck connection - mechanically locks the post in place rather than relying on nails or screws alone, improving structural integrity at every joint
• Stronger than angled nailing or screw fastening - delivers greater holding power at the connection point, reducing the risk of joint failure under load
• Reduces post splitting and eliminates end-grain nailing - protects the 4x6 post from damage during installation and over the long term, helping preserve the structural member
• 18-gauge steel construction - provides a sturdy, rigid connector that holds its shape and maintains consistent performance in structural framing applications
• G90 zinc galvanized finish - offers enhanced corrosion resistance, making this post cap well suited for outdoor settings such as decks and patio covers where moisture exposure is a regular concern
• Dual-purpose cap and base design - functions as either a post cap or a light-duty post base, adding versatility for different framing configurations
• Not recommended for non top-supported installations - such as fences or unbraced carports, ensuring the connector is used only in applications where it performs as intended

Why This Product

• A mechanical advantage over traditional fastening - unlike toe-nailing or screwing into end grain, this post cap creates a positive connection that distributes load more effectively and reduces the chance of the post splitting over time
• Built for outdoor durability - the G90 zinc galvanized coating provides a meaningful layer of corrosion protection, making this connector a practical choice for decks, pergolas, and patio cover framing exposed to the elements
• Made in the United States by a trusted connector brand - Simpson has a long-standing reputation in structural connectors, and this cap is manufactured domestically to consistent quality standards
• Versatile enough for multiple framing scenarios - its dual-purpose cap and base design means one connector can serve light cap or base applications, reducing the need to stock separate hardware for different parts of a project

Specifications

• MPN: BC46
• Member Size: 4x6
• Width 1: 3-9/16 in.
• Width 2: 5-1/2 in.
• Length 1: 4-7/8 in.
• Length 2: 2-7/8 in.
• Height 1: 3-1/2 in.
• Height 2: 2-1/2 in.
• Gauge: 18
• Coating: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• 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 wood decks
• Deck framing and patio cover construction
• Light-duty post cap and base applications
• Attaching posts to existing hardened concrete, wet concrete, or wood surfaces

Downloads and Resources

• View Spec Sheet

Frequently Asked Questions

What post size is the BC46 designed for?

The BC46 is designed for a nominal 4x6 post size.

Can the BC46 be used for fences or unbraced carports?

No. The BC46 is not recommended for non top-supported installations, such as fences or unbraced carports.

What fasteners should be used to install the BC46?

The BC46 should be installed with 16d common nails or 16d x 2 1/2" joist hanger nails.

Why is the G90 galvanized coating important?

The G90 zinc galvanized coating provides extra corrosion resistance, making the BC46 suitable for outdoor applications such as decks and patio covers where exposure to moisture is a concern.

Note: Product dimensions and/or screw or bolt holes may differ from picture. Please see item description for specifications.