The Simpson Strong-Tie E20/3 Angle Bracket for Cross-Laminated Timber is a heavy-gauge steel connector engineered to join cross-laminated timber (CLT) wall panels to concrete slabs. Built from 11-gauge steel with a G90 zinc galvanized finish, this bracket is uniquely load-rated with up to a 2-inch gap between the bottom of the CLT wall and the top of the concrete slab - giving contractors the flexibility to incorporate a pressure-treated sill plate, concrete curb, grout pad, or other specified separator material at the base of the wall without sacrificing rated performance. A wide variety of fastener and anchor options are available depending on the required loads and application, making this connector a versatile choice for CLT structural connections.

Key Features

• 11-gauge steel construction - delivers the heavy-gauge strength needed to achieve high load capacity at CLT-to-concrete connections
• Load-rated with up to a 2-inch base-of-wall gap - allows the CLT wall to be separated from the concrete slab with a pressure-treated sill plate, grout pad, concrete curb, or other specified material while maintaining rated performance
• Anchorage to concrete - provides a secure, engineered connection point between CLT wall panels and concrete slab substrates
• G90 zinc galvanized finish - adds a layer of corrosion resistance that helps extend the service life of the connector in demanding construction environments
• Multiple fastener and anchor options supported - accommodates Strong-Drive SD Connector screws, nails, or SDHR Combo-Head screws paired with 3/8 in. anchor bolts, letting installers match the fastening method to load requirements and site conditions

Why This Product

• Purpose-built for CLT construction - as part of Simpson Strong-Tie's E series, this bracket is specifically designed for cross-laminated timber wall-to-slab connections rather than adapted from a general-purpose angle bracket, ensuring the geometry and load ratings align with real CLT applications
• Rated gap tolerance simplifies base-of-wall detailing - the verified 2-inch gap rating means structural engineers and contractors can confidently specify separator materials like sill plates or grout pads at the base of CLT walls without requiring a custom engineering solution
• Fastener flexibility supports a range of load demands - three distinct fastener configurations using Simpson Strong-Tie Strong-Drive screws, nails, or SDHR Combo-Head screws allow the installer to optimize the connection for the specific loads and conditions of each project
• Galvanized steel durability - the G90 zinc galvanized coating provides meaningful corrosion protection, making this bracket suitable for use in environments where long-term connector integrity is a priority

Specifications

• Model Number (MPN): E20/3
• Brand: Simpson Strong-Tie
• Gauge: 11
• Height: 6-3/4 in.
• Depth: 4-1/2 in.
• Width: 3-3/4 in.
• Coating: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• Country of Origin: France

Approved Applications

• Connecting cross-laminated timber (CLT) wall panels to concrete slabs
• Installations requiring a base-of-wall gap of up to 2 inches
• Applications incorporating a pressure-treated sill plate between the CLT wall and concrete slab
• Installations using a concrete curb, grout pad, or other specified separator material at the base of the wall

Frequently Asked Questions

What is the Simpson Strong-Tie E20/3 angle bracket used for?

The E20/3 angle bracket is used to connect cross-laminated timber (CLT) wall panels to concrete slabs. It is part of Simpson Strong-Tie's E series of angle brackets designed specifically for CLT construction applications.

What is the maximum base-of-wall gap this bracket is rated for?

The E20/3 angle bracket has been load-rated with up to a 2-inch gap between the bottom of the CLT wall and the top of the concrete slab. This allows the wall to be separated with a pressure-treated sill plate, concrete curb, grout pad, or other specified material.

What fasteners are recommended for installing the E20/3 bracket?

The E20/3 can be installed with (18) #10 x 2-1/2 in. Strong-Drive SD Connector screws and (2) 3/8 in. anchor bolts; or (18) 0.162 in. x 2-1/2 in. nails and (2) 3/8 in. anchor bolts; or (3) SDHR27400 0.275 in. x 4 in. Strong-Drive SDHR Combo-Head screws and (2) 3/8 in. anchor bolts.

What material and finish is the E20/3 angle bracket made from?

The E20/3 is made from 11-gauge steel with a Zinc Galvanized, G90 finish, which provides extra corrosion resistance and heavy-duty load capacity suitable for structural CLT-to-concrete connections.