Product Description
Simpson Strong-Tie DPT7Z ZMAX Galvanized Deck Post Tie for 4x4 Post is a heavy-duty structural connector engineered by Simpson Strong-Tie to attach 4x4 vertical posts to the outside face of stair stringers, rim joists, and other wood members on decks and stairs. Built from 14-gauge steel with a ZMAX galvanized finish, this deck post tie delivers exceptional corrosion resistance for exterior and treated-wood applications while providing a faster, cleaner alternative to traditional through-bolting methods.
Key Features
- Connects a 4x4 post to the outside of stair stringers and rim joists on decks or stairs in new or retrofit construction
- Easier than through-bolting
- Nominal post size: 4x4
- Made from 14-gauge steel
- ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications
- Typically installed in pairs
Specifications
- Manufacturer: Simpson Strong-Tie
- MPN: DPT7Z
- Member Size: 4x4
- Gauge: 14-gauge steel
- Finish / Coating: ZMAX
- Install With: 3/8 in. diameter machine bolts and 10d x 1-1/2 in. nails or #9 x 1-1/2 in. Strong-Drive SD screws
- Country of Origin: United States
Approved Applications
- Attaching 4x4 vertical posts to the outside face of stair stringers on decks and stairs
- Securing 4x4 posts to rim joists in new deck construction
- Retrofit installation on existing decks and stair assemblies
- Exterior applications involving pressure-treated lumber where corrosion resistance is required
Frequently Asked Questions
- What size post is the DPT7Z designed to work with?
- The DPT7Z is designed for a nominal 4x4 post size, connecting the post to the outside of stair stringers, rim joists, or other wood members.
- What fasteners are required to install the DPT7Z?
- Install with 3/8 in. diameter machine bolts and 10d x 1-1/2 in. nails or #9 x 1-1/2 in. Strong-Drive SD screws. Note that lag screws are not permitted in place of machine bolts.
- Why is the ZMAX finish important for this connector?
- ZMAX galvanization provides extra corrosion resistance compared to standard galvanized finishes, making the DPT7Z suitable for exterior applications and use with pressure-treated wood where moisture and chemical exposure can accelerate corrosion.
- How many DPT7Z connectors are typically needed for an installation?
- The DPT7Z is typically installed in pairs, with two connectors used together to properly secure a 4x4 post to the adjacent structural member.
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FAQs
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