The Simpson 4x6 Column Cap with SDS Screws CCQ46SS-SDS2.5 is a stainless steel structural connector engineered for high-capacity column-to-beam connections in demanding applications. Built by Simpson and designed specifically for 4x beam and 6x post combinations, this column cap pairs precision-formed stainless steel construction with Strong-Drive SDS Heavy-Duty Connector screws - delivering a corrosion-resistant, low-profile solution suited for exterior, coastal, and high-load structural assemblies.

Key Features

• Stainless Steel Construction - Provides maximum corrosion resistance for exposed, exterior, and coastal environments where standard galvanized hardware is insufficient.
• SDS Screw Installation - Strong-Drive SDS Heavy-Duty Connector screws are included with the column cap, enabling faster installation compared to traditional through-bolt methods while preserving more net section area of the post.
• Low-Profile Connection - The screw-based fastening system results in a cleaner, lower-profile connection than conventional bolted hardware, making it well-suited for applications where aesthetics or clearance matter.
• 4x Beam, 6x Post Compatibility - Engineered specifically for this column-beam combination, ensuring a precise structural fit without field modification.
• High-Load Structural Performance - Approved for applications subject to earthquake and high-wind uplift loading requirements, supporting code-compliant construction in demanding conditions.
• Domestic Manufacturing - Produced in the United States under Simpson quality standards, consistent with the tight tolerances required for structural connectors.

Why This Product

• Built for Harsh Environments - The all-stainless steel material makes this column cap a reliable long-term choice for coastal builds, exposed outdoor structures, and any application where corrosion resistance is a primary concern.
• Faster, Stronger Fastening - Because SDS screws are included and eliminate the need for pre-drilling or through-bolts, installation is more efficient without sacrificing load performance at the column-to-beam connection.
• Versatile Structural Applications - Approved for high-wind and seismic uplift loading, this connector fits a broad range of structural scenarios from residential decks and pergolas to commercial framing assemblies requiring a verified, code-appropriate solution.
• Exact-Fit Design for 4x6 Combinations - Purpose-built dimensions for 4x beams and 6x posts mean no guesswork, reducing the risk of misfit connections and simplifying specification for engineers and contractors alike.

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: CCQ46SS-SDS2.5
• Finish / Material: Stainless Steel
• Beam Size: 4X
• Post Size: 6X
• Thickness: 7 Gauge
• Beam Width: 3-1/2 in.
• Width 1: 3-5/8 in.
• Width 2: 5-1/2 in.
• Length 1: 11 in.
• Height 1: 7 in.
• Country of Origin: United States

Approved Applications

• High-capacity column-to-beam structural connections
• Exterior and exposed structural applications requiring corrosion resistance
• Coastal or harsh-environment construction where stainless steel is specified
• Structures subject to earthquake or high-wind uplift loading requirements
• Applications where a low-profile connection is required or preferred over through bolts

What's Included

• 1 x Simpson Strong-Tie CCQ46SS-SDS2.5 Stainless Steel Column Cap
• 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector screws (included with the column cap)

Installation Notes

• Install with 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector screws, which are provided with the column cap.
• Important: Lag screws will not achieve the same load values and should not be substituted.
• CCOQ and ECCOQ column cap only (no straps) may be ordered for field-welding to pipe or other columns. Dimensions are the same as CCQ and ECCQ.

Options

• Contact us for Configurable Options and Special orders

Frequently Asked Questions

What size column and beam is this cap designed for?

The CCQ46SS-SDS2.5 is specifically engineered for 4x6 column-beam combinations, making it suitable for demanding structural connections where that lumber dimension is required.

Do the SDS screws come included with this column cap?

Yes, Simpson Strong-Tie Strong-Drive SDS Heavy-Duty Connector screws ship included with the hardware, so no separate fastener purchase is necessary for installation.

Why is a screw-based design preferable to traditional through-bolt connections?

The SDS screw-based design offers several advantages over traditional bolted connections: it provides a lower profile that reduces interference with surrounding materials, allows for faster assembly, and preserves greater net section area of the column by avoiding the material removal required for through-bolt holes.

Is this column cap suitable for coastal or exterior environments?

Yes, the CCQ46SS-SDS2.5 is constructed from stainless steel, which delivers maximum corrosion resistance. This makes it an ideal choice for exposed or coastal applications where harsh environmental conditions would compromise standard steel connectors.