Simpson DTT2Z-SDS2.5 DTT2Z ZMAX Galvanized Deck Tension Tie for 2x with 2-1/2 in. SDS Screws by Simpson Strong-Tie is a safe, cost-effective connector designed to attach deck-railing posts to deck framing for stronger, safer railings. Because the post is tied back into the deck joists rather than to the rim joist alone, the connection is stronger than typical through-bolt installations. The DTT2Z is also ideal for guardrail-post connections and lateral-load connections between the deck and house.

Key Features

• Suitable for lighter duty holdown applications on single or double 2x posts
• Ties the guardrail post into deck framing
• Stronger and safer than nails, lag screws or bolts
• Ties the deck into the house for a stronger, safer ledger connection
• Helps prevent a common type of deck failure
• Installs easily with Strong-Drive Heavy-Duty Connector screws (included)
• Made from 14-gauge steel
• ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications

Specifications

• MPN: DTT2Z-SDS2.5
• Brand: Simpson Strong-Tie
• Gauge: 14
• Coating/Finish: ZMAX
• Member Size: Single or double 2x
• Install With: 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws (included) and 1/2 in. machine or anchor bolt
• Depth: 3-1/4 in.
• Height: 6-15/16 in.
• Seat Depth: 1-5/8 in.
• Centerline: 13/16 in.
• Screw Offset: 3/16 in.
• Country of Origin: United States

Approved Applications

• Deck railing post-to-framing connections for stronger, safer railings
• Guardrail-post connections
• Lateral-load connections between the deck and house
• Lighter duty holdown applications on single or double 2x posts
• Ledger connections for tying the deck into the house

What's Included

Each pack contains (1) DTT2Z-SDS2.5 Deck Tension Tie, 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws.

Downloads and Resources

• See Load Tables & SPECS : Specifications

Frequently Asked Questions

Why is the DTT2Z-SDS2.5 stronger than a typical through-bolt installation?

The DTT2Z ties the post back into the deck joists rather than attaching to the rim joist alone. This distributes the load more effectively through the deck framing, resulting in a stronger and safer connection than typical through-bolt, nail, lag screw, or bolt installations.

What fasteners are required to install the DTT2Z-SDS2.5?

Installation requires 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws, which are included with the product, as well as a 1/2 in. machine or anchor bolt. For best results, use a low-speed, high-torque drill with a 3/8 in. hex head driver for the SDS screws.

Is the DTT2Z-SDS2.5 suitable for use with pressure-treated wood and exterior applications?

Yes. The DTT2Z features ZMAX galvanization, which offers extra corrosion resistance specifically designed for exterior and treated-wood applications, making it well suited for outdoor deck construction environments.

What post sizes is the DTT2Z-SDS2.5 compatible with?

The DTT2Z-SDS2.5 is compatible with single or double 2x posts, making it suitable for a range of lighter duty holdown applications in deck and guardrail-post connections.

Note: Product dimensions and/or Screw or Bolt holes may differ from picture.