Product Description
The Simpson Rough 4 x 4 Adjustable Post Base ZMAX ABU44RZ is a high-capacity structural connector from Simpson engineered to anchor wooden posts securely to existing concrete. Its built-in 1-in. standoff keeps post ends elevated above the concrete surface to help prevent rot, while the slotted anchor hole allows for on-site adjustability so posts can be positioned precisely where needed. Built from heavier-gauge steel with ZMAX galvanization, this adjustable post base is a reliable choice for exposed exterior installations, treated-wood framing, and applications where earthquake or wind uplift resistance is a structural priority.
Key Features
- Slotted anchor hole for adjustability - enables flexibility around the anchor bolt so you can fine-tune post placement during installation without having to reposition the anchor.
- Built-in 1-in. standoff design - meets code requirements for structural posts in basements or areas exposed to weather or water splash, and helps protect post ends from moisture-related rot.
- Increased uplift load capacity - engineered to handle demanding earthquake and wind loading conditions, making it suitable for high-capacity structural applications.
- ZMAX galvanized coating - provides extra corrosion resistance beyond standard galvanization, making this post base well-suited for exterior use and direct contact with pressure-treated lumber.
- Dual-gauge steel construction (base 16, strap 12) - pairs a sturdy base plate with a heavier strap for strength where it matters most, without unnecessary added weight throughout.
- Multiple fastener options - installs with 0.162 in. x 3-1/2 in. nails, Strong-Drive SD Connector screws, or 1/2 in. machine bolts, giving contractors flexibility to use the fastening method best suited to the job.
Why This Product
- Built for long-term performance in tough environments - the ZMAX coating delivers superior corrosion resistance that holds up in exterior conditions and alongside treated wood, reducing the risk of premature connector failure over time.
- Helps protect your structural investment - the 1-in. standoff separates the post end from the concrete surface, cutting off a common moisture pathway that leads to rot and costly repairs down the line.
- Simplifies installation in real-world conditions - the slotted base hole means anchor bolt placement does not have to be perfect, reducing frustration and rework when attaching posts to existing concrete.
- Engineered for high-stakes structural loads - with increased uplift capacity for seismic and wind events, this post base is a dependable choice when building codes and structural demands call for more than a standard post anchor can provide.
Specifications
- MPN: ABU44RZ
- Nominal Post Size: Rough 4x4
- Width: 3 in.
- Length: 4-1/16 in.
- Height: 5-1/4 in.
- Hole Bottom: 1-1/2 in.
- Coating: ZMAX
- Finish: ZMAX
- Gauge: Base 16; strap 12
- Install With: Install with 0.162 in. x 3-1/2 in. nails or 1/2 in. machine bolts (sold separately)
- Country of Origin: United States
Frequently Asked Questions
- What is the purpose of the 1-in. standoff in the ABU44RZ post base?
- The built-in 1-in. standoff helps prevent rot at the end of the post by keeping the wood elevated away from the concrete surface. This design meets code requirements for structural posts installed in basements or in locations exposed to weather or water splash.
- What fasteners are used to install the ABU44RZ?
- The ABU44RZ installs with 0.162 in. x 3-1/2 in. nails or 1/2 in. machine bolts. It can also be attached using Strong-Drive SD Connector screws or bolts for added versatility.
- Why does the ABU44RZ feature ZMAX galvanization?
- ZMAX galvanization provides extra corrosion resistance, making the ABU44RZ well-suited for exterior applications and use with treated wood, where standard galvanization may not offer sufficient protection against the elements.
- How does the slotted anchor hole benefit installation?
- The slotted anchor hole in the base enables flexibility around the anchor bolt, allowing for minor adjustments during installation and making precise post placement significantly easier in high-capacity applications.
Note: Product dimensions may differ from picture.
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