The Simpson Glulam Column Base 9 x 7.5 is a heavy-duty column base from Simpson, engineered to create a secure, high-strength connection between large structural posts and concrete foundations. Designed specifically for a Glulam 9" x 7.5" nominal column size, this base accommodates lumber, glulam, and engineered wood product posts with equal reliability. Its cast-in-place and wet-set installation compatibility makes it a practical choice for residential, commercial, and industrial column applications where structural integrity, uplift resistance, and long-term durability are non-negotiable requirements.

Key Features

• Flush base plate design - sits level with the concrete surface to deliver full post bearing beneath the column, maximizing load transfer and structural stability.
• Cast-in-place and wet-set installation compatibility - allows the base to be set directly into concrete during the pour, simplifying the installation process and reducing post-cure anchor work.
• Sized for Glulam 9" x 7.5" columns - precision-fit dimensions ensure a proper, code-consistent connection for large structural columns using glulam, lumber, or engineered wood products.
• Simpson Strong-Tie gray paint finish - provides a consistent, protected surface suited for demanding structural environments where appearance and corrosion resistance both matter.
• Fastened with (2) 5/8" bolts - a straightforward two-bolt fastening pattern keeps installation efficient while delivering the high uplift resistance required in wind-prone and seismic regions.
• American-made construction - produced domestically, supporting consistent manufacturing standards expected on professional structural projects.

Why This Product

• Built for the demands of large-column structural work - the Glulam 9" x 7.5" sizing targets heavy-load applications in commercial and industrial construction where an undersized or generic base simply is not appropriate.
• Versatile installation methods reduce project complexity - cast-in-place and wet-set compatibility gives contractors flexibility to work the base into the concrete schedule without requiring separate anchor bolt systems or additional hardware steps.
• Reliable in high-stress environments - the design addresses high uplift resistance needs, making it a sound choice for structures in wind-prone or seismic regions where connection performance is closely scrutinized.
• Broad material compatibility - acceptance of lumber, glulam, and engineered wood product posts means this column base adapts to the framing material specified on the project rather than dictating it.

Specifications

• Specification: Detail
• Manufacturer: Simpson Strong-Tie
• MPN: CB9-7.5
• Nominal Column Size: Glulam 9" x 7.5"
• Fasteners Required: (2) 5/8" Bolts (sold separately)
• Finish: Simpson Strong-Tie Gray Paint
• Width 1: 7-1/2 in.
• Width 2: 8-3/4 in.
• Country of Origin: United States

Approved Applications

• Connecting glulam, lumber, and engineered wood product posts to concrete foundations
• Structural columns in residential, commercial, and industrial construction
• Applications requiring high uplift resistance in wind-prone or seismic regions
• Cast-in-place or wet-set concrete foundation installations
• Columns demanding high structural load values and rugged long-term performance

What's Included

• (1) Simpson Strong-Tie CB9-7.5 Column Base
• Note: (2) 5/8" bolts are required for installation and are not included unless otherwise stated.

Options

• Contact us for Configurable Options and Special orders

Frequently Asked Questions

What column size is the CB9-7.5 designed to fit?

The CB9-7.5 is designed specifically for a Glulam 9" x 7.5" column size, making it suitable for large structural columns using lumber, glulam, or engineered wood products.

How is the CB9-7.5 installed?

The CB9-7.5 supports both cast-in-place and wet-set installation methods, meaning it can be set directly into concrete during the pour. The base plate sits flush with the concrete surface to provide full post bearing beneath the column.

What hardware is used to fasten the CB9-7.5?

The CB9-7.5 is fastened using (2) 5/8" bolts. The bolt hole locations are positioned to meet code-required spacing, which helps optimize the connection capacity of the installation.

Is the CB9-7.5 suitable for applications with wind or seismic loading?

Yes. The CB9-7.5 is engineered with increased uplift resistance to help counter forces associated with wind and seismic loading, making it appropriate for structural applications where enhanced security against uplift is required.