The Simpson BCS2-2/4 Post Cap from Simpson Strong-Tie delivers an engineered, positive connection between a double 2x beam and a 4x post for wood decks, patio covers, and other top-supported post-and-beam assemblies. Double-shear nailing between the beam and post distributes load across two shear planes, providing a structurally superior alternative to angled nailing or screw fastening into end grain. Built from 18-gauge steel with a G90 galvanized finish, this post cap is designed to hold up in the outdoor conditions that deck and patio framing routinely faces.

Key Features

• Positive post-to-beam connection - mechanically secures the beam to the post rather than relying on friction or toe-nailing, giving your structure a more dependable load path
• Double-shear nailing design - loads are shared across two shear planes, resulting in a stronger joint than angled nailing or direct screw fastening methods
• Reduces post splitting and eliminates end-grain nailing - the connector routes fasteners into the face of the post and beam, protecting the wood and preserving long-term structural integrity
• 18-gauge steel construction - provides a sturdy, rigid connector that maintains its shape during installation and throughout the life of the structure
• G90 zinc galvanized finish - an extra layer of corrosion resistance keeps the connector performing reliably in exposed outdoor environments
• Sized for double 2x beam and 4x post framing - matches standard deck and patio cover lumber dimensions, simplifying layout and installation
• Not recommended for non top-supported installations such as fences or unbraced carports - knowing the approved applications upfront helps ensure a code-compliant, safe build

Why This Product

• Engineered strength where it counts - double-shear nailing between the beam and post gives this cap a structural advantage over common field methods like angled nailing or toe-screwing, reducing the risk of joint movement or failure over time
• Protects your lumber investment - by eliminating end-grain nailing and reducing the chance of post splitting, this connector helps the structural members perform as intended for the life of the deck or patio cover
• Built for outdoor durability - the G90 galvanized coating provides corrosion resistance suited to the exposed conditions typical of deck framing, so the connection stays sound season after season
• Straightforward compatibility with common fasteners - installs with 10d common nails or Number 9 x 1-1/2 in. Strong-Drive SD screws, fastener types that are widely available and familiar to both professional contractors and experienced DIYers

Specifications

• Model Number: BCS2-2/4
• Member Size: Double 2x beam, 4x post
• Gauge: 18
• Coating/Finish: Zinc Galvanized, G90
• Width 1: 3-1/8 in.
• Width 2: 3-9/16 in.
• Length 1: 2-7/8 in.
• Length 2: 2-7/8 in.
• Height 1: 2-15/16 in.
• Height 2: 2-15/16 in.
• Fasteners Required (Beam Flange): (8) 0.162 x 3-1/2 in. nails (sold separately)
• Fasteners Required (Post Flange): (6) 0.162 x 3-1/2 in. nails (sold separately)
• Install With: 10d common nails or #9 x 1-1/2 in. Strong-Drive SD screws (sold separately)
• Brand: Simpson Strong-Tie
• Country of Origin: United States

Approved Applications

• Wood deck post-to-beam connections
• Patio cover structural connections
• Top-supported post and beam assemblies requiring double 2x beam and 4x post configurations
• Connections requiring added strength over angled nailing or screw fastening

Downloads and Resources

• View Spec Sheet

Frequently Asked Questions

What member sizes does the BCS2-2/4 post cap accommodate?

The BCS2-2/4 is designed for a double 2x beam connecting to a 4x post, making it well suited for standard deck and patio cover framing configurations.

Why is double-shear nailing important in this post cap?

Double-shear nailing between the beam and post distributes load across two shear planes rather than one, resulting in a stronger connection than traditional angled nailing or direct screw fastening into end grain.

What fasteners are approved for use with the BCS2-2/4?

Install with 10d common nails or #9 x 1-1/2 in. Strong-Drive SD screws. The beam flange requires (8) 0.162 x 3-1/2 in. nails and the post flange requires (6) 0.162 x 3-1/2 in. nails. Always use all specified fasteners for a code-compliant installation.

Can the BCS2-2/4 be used for fences or unbraced carports?

No. This post cap is not recommended for non top-supported installations such as fences or unbraced carports, as post caps do not provide adequate resistance to prevent members from rotating about the base in those applications.

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