The Simpson APT4 Ornamental T Strap 4x from Simpson brings decorative appeal and lateral strength to outdoor living spaces, reinforcing connections where one lumber piece intersects another at a 90 deg. angle. Built from 12-gauge steel and finished with ZMAX galvanization beneath a black powder coat, this flat T strap is engineered to hold up in exterior and treated-wood applications while maintaining a clean, cohesive look. Part of the Outdoor Accents Mission Collection, it pairs with matching structural screws and hex-head washers to deliver a polished ornamental appearance across pergolas, decks, arbors, and other heavy timber structures.

Key Features

• ZMAX galvanization with black powder coat - delivers dual-layer corrosion resistance for long-term performance in exterior environments and treated-wood applications where moisture and chemicals accelerate rust
• 12-gauge steel construction - provides the structural rigidity needed to reinforce 90 deg. angle connections on 4x or larger lumber members common in heavy outdoor framing
• Part of the Outdoor Accents Mission Collection - ensures a consistent decorative aesthetic across an entire structure when combined with other Mission Collection hardware
• Installs with Outdoor Accents structural screws and hex-head washers (sold separately) - the coordinated fastener system creates a finished, intentional look rather than exposing standard hardware at visible connection points
• Designed for 4x or larger lumber members - sized and rated for the heavy timber framing typical of pergolas, deck structures, and outdoor living builds where undersized straps would be inadequate

Why This Product

• Form and function in one piece - unlike plain utility straps, the black powder-coat finish and Mission Collection design mean structural reinforcement does not come at the cost of appearance, making it well suited for visible connections on decks, pergolas, and arbors
• Built for harsh outdoor conditions - the combination of ZMAX galvanization and black powder coat provides layered protection against corrosion, giving this strap durability in exterior settings and compatibility with treated lumber where single-layer coatings can fall short
• Engineered for heavy timber applications - compatibility with 4x or larger members means this strap handles the substantial framing loads found in outdoor structures, reducing the risk of using an undersized connector where it matters most
• Cohesive hardware system - because it installs with matching Outdoor Accents hex-head washers and structural wood screws, every visible fastener point contributes to a unified decorative finish rather than clashing with the surrounding woodwork

Specifications

• MPN: APT4
• Brand: Simpson Strong-Tie
• Collection: Outdoor Accents Mission Collection
• Dimensions: 13-1/2 in. x 8-1/4 in.
• Gauge: 12
• Coating: ZMAX
• Finish: ZMAX Galvanized with Black Powder Coat
• Member Size: 4x or larger
• Width: 3 in.
• Height: 8-1/4 in.
• Length: 13-1/2 in.
• Country of Origin: United States

Approved Applications

• Exterior outdoor living structures such as decks, pergolas, and arbors
• Connections where one lumber piece intersects another at a 90 deg. angle
• Treated-wood applications requiring extra corrosion resistance
• 4x or larger lumber members in outdoor structural assemblies

Downloads and Resources

• View Spec Sheet

Frequently Asked Questions

What fasteners are required to install the APT4 T Strap?

Install with (3) STN22 Outdoor Accents hex-head washers and (3) SDWS22312DBB Outdoor Accents structural wood screws. These fasteners are sold separately and complete the decorative look of the connection.

What size lumber is the APT4 compatible with?

The APT4 is designed for use with 4x or larger lumber members, making it well suited for the heavy timber framing commonly found in pergolas, deck structures, and outdoor living spaces.

Why does the APT4 feature ZMAX galvanization with a black powder coat?

ZMAX galvanization with black powder coat offers extra corrosion resistance for exterior and treated-wood applications. This dual-layer protection helps the strap withstand the harsh conditions typical of outdoor environments, including exposure to treated lumber chemicals.

What type of connection does the APT4 T Strap reinforce?

The APT4 provides reinforcement for a connection where one lumber piece intersects another at a 90 deg. angle. In addition to structural reinforcement, it brings decorative appeal to the connection as part of the Outdoor Accents Mission Collection.

Related Products

• SDWS22312DBB Screws
• STN22 Washers
• Simpson-Strong-Tie Outdoor Accents