The Simpson Strong-Tie CB5-4.5 Glulam Column Base is a heavy-duty structural connector engineered to securely connect posts to concrete foundations across a wide range of lumber, glulam, and engineered wood product sizes. Designed for either cast-in-place or wet-set installation, the base plate sits flush with the concrete surface to provide full post bearing and a clean, low-profile finish. Built for demanding structural applications, the CB5-4.5 delivers high structural values and rugged, long-lasting performance where it matters most - in wind-prone and seismically active environments.

Key Features

• Full Post Bearing: Cast-in-place or wet-set installation allows the base plate to sit flush with the concrete, ensuring complete bearing contact beneath the post.
• Increased Uplift Resistance: Engineered to resist the elevated uplift forces associated with wind and seismic loading conditions.
• Code-Compliant Bolt Hole Spacing: Bolt hole locations are positioned to meet code-required spacing for optimal load capacity and structural integrity.
• High Structural Values: Ideal for columns requiring superior load transfer and rugged, reliable performance.
• Simpson Strong-Tie Gray Paint Finish: Factory-applied gray paint provides a durable, uniform coating suited for structural connector applications.
• Made in the USA: Manufactured in the United States to meet Simpson Strong-Tie's rigorous quality standards.

Specifications

• Manufacturer: Simpson Strong-Tie
• Model / MPN: CB5-4.5
• Nominal Column Size: Glulam 5" x 4.5"
• Finish: Simpson Strong-Tie Gray Paint
• Fasteners Required: Bolts - (2) 5/8" (sold separately)
• Installation Method: Cast-in-place or Wet Set
• Width 1: 4-1/2 in.
• Width 2: 5-1/4 in.
• Country of Origin: United States

Approved Applications

• Connecting glulam, lumber, and engineered wood product columns to concrete foundations
• Residential and commercial post-to-foundation connections requiring high structural values
• Structures located in high-wind or seismic zones requiring enhanced uplift resistance
• Exterior and interior column base applications where flush concrete installation is required
• New construction applications utilizing cast-in-place or wet-set concrete methods

What's Included

• (1) Simpson Strong-Tie CB5-4.5 Column Base
• Note: (2) 5/8" bolts are required for installation and are not included.

• Contact us for Configurable Options and Special orders

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

Frequently Asked Questions

What types of posts and materials is the CB5-4.5 compatible with?

The Simpson Strong-Tie CB5-4.5 is engineered to connect a wide range of lumber, glulam, and engineered wood product sizes to concrete foundations, making it suitable for solid sawn posts, glulam columns, and other engineered wood columns.

How is the CB5-4.5 installed - does it require special concrete work?

The CB5-4.5 is designed for either cast-in-place or wet-set installation into concrete. In both methods, the base plate sits flush with the concrete surface, ensuring full bearing contact beneath the post and providing a clean, low-profile finish.

Is the CB5-4.5 suitable for use in high-wind or seismic regions?

Yes. The CB5-4.5 is specifically engineered to resist elevated uplift forces associated with wind and seismic loading conditions, making it well suited for structural applications in wind-prone and seismically active environments.

What finish is applied to the CB5-4.5, and where is it manufactured?

The CB5-4.5 features a factory-applied Simpson Strong-Tie gray paint finish that provides a durable, uniform coating for structural connector applications. It is manufactured in the United States to Simpson Strong-Tie's quality standards.