The Simpson CTS218 Compression/Tension Strap is an 18-inch, 14-gauge steel repair strap from Simpson that stands apart as the brand's first strap engineered to resist both tension and compression loads in a single connector. Purpose-built to repair damaged or notched wood framing members - including top plates, studs, and trusses - it features unique rolled edges that allow it to span gaps as wide as 4-1/2 in., while its 1-1/2 in. width fits cleanly on the narrow face of 2x lumber. A G90 zinc galvanized finish delivers dependable corrosion resistance, making this strap a reliable choice for structural framing repairs where both load directions must be addressed.

Key Features

• Handles both tension and compression loads - eliminates the need for separate connectors when a repair site experiences pulling and pushing forces, simplifying the structural fix.
• Unique rolled edges span gaps up to 4-1/2 in. - lets contractors bridge wide notches or cuts in framing without requiring additional blocking or filler material.
• 1-1/2 in. width fits the narrow face of 2x lumber - enables clean, flush installation on standard dimensional framing without overhanging the member edge.
• Tested specifically for top/bottom plate repair with various multi-strap configurations - gives installers verified, code-supportable options for one-sided, two-sided, and three-part strap layouts to match the severity of the repair.
• One-sided and two-sided installation flexibility - one or two CTS straps can be installed on the same face, or straps can be placed on opposite sides of the member, accommodating tight jobsite conditions.
• 14-gauge steel construction with G90 zinc galvanized finish - provides the structural thickness and corrosion resistance needed for demanding repair applications in framing environments.
• Installs with 10d x 1-1/2 in. nails or #9 x 1-1/2 in. Strong-Drive SD screws - compatible with common fastener types already on most jobsites, keeping installation straightforward.

Why This Product

• A true dual-load solution - unlike standard tension-only straps, the CTS218 is engineered to resist both compression and tension forces, making it the right connector for framing repairs where load direction is not limited to one axis.
• Versatile multi-strap configurations tested for plate repair - whether a top plate has been cut for plumbing or notched for HVAC ductwork, this strap has been validated in one-sided, two-sided, and three-part layouts, giving contractors a tested path to a compliant repair.
• Designed to work where space is limited - the 1-1/2 in. profile fits the narrow face of 2x lumber and the rolled-edge design bridges gaps up to 4-1/2 in., so the strap adapts to real-world framing conditions rather than requiring perfect substrate preparation.
• Built for lasting performance - 14-gauge steel paired with a G90 zinc galvanized coating means this connector holds up against the corrosion and mechanical stress typical of structural framing repair applications.

Specifications

• MPN: CTS218
• Brand: Simpson Strong-Tie
• Gauge: 14
• Width: 17-7/8 in.
• Height: 1-1/2 in.
• Depth: 3/8 in.
• Coating: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• Install With: Install with 10d x 1-1/2 in. nails or #9 x 1-1/2 in. Strong-Drive SD screws (sold separately)
• Country of Origin: United States

Approved Applications

• Repairing top plates that have been cut or notched to accommodate plumbing or HVAC ductwork
• Repair of wood members including top plates, studs, and trusses
• Structural connections requiring both tension and compression load resistance
• Installations on the narrow face of 2x lumber
• Spanning gaps as wide as 4-1/2 in. in wood framing repairs

Downloads and Resources

• Model No. CTS218Ga. 14Coating/Material Zinc Galvanized, G90View Spec Sheet

Frequently Asked Questions

What makes the CTS218 different from other Simpson Strong-Tie straps?

The CTS218 is Simpson Strong-Tie's first strap designed to handle both tension and compression loads. Its unique rolled edges allow it to span gaps as wide as 4-1/2 in., and its 1-1/2 in. width enables installation on the narrow face of 2x lumber - capabilities not typically found in standard straps.

What types of wood members can the CTS218 be used to repair?

The CTS218 is designed to repair wood members such as top plates, studs, and trusses. It has been tested specifically for top/bottom plate repair with various multi-strap configurations, including repairs to plates that have been cut or notched for plumbing or HVAC ductwork.

What fasteners are recommended for installing the CTS218?

The CTS218 should be installed with 10d x 1-1/2 in. nails or #9 x 1-1/2 in. Strong-Drive SD screws.

Can the CTS218 be installed on both sides of a wood member?

Yes. The CTS218 supports multiple installation configurations: one-sided installations allow one or two CTS straps on the same side of the member, and two-sided installations place CTS straps on opposite sides. For three-part installations, two straps are installed on one side and one strap on the opposite side.

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