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Simpson Strong-Tie

Model # ABA44Z

Internet # 100374999

Store SKU # 669421

ABA 4x4 ZMAX Galvanized Adjustable Post Base

This item has been discontinued.
The Home Depot no longer carries this specific product.

$11.44 /each




Model # ABA44Z

Internet # 100374999

Store SKU # 669421

Store SO SKU # 592854

Post and Column Bases secure the bottom of posts or columns to concrete and are perfect for decks or patio covers. Models are available for attaching to existing hardened concrete, wet concrete, as well as wood. The AB series also offers adjustability around the anchor bolt to achieve optimum post placement. And many models provide a 1 in. standoff from the concrete to help avoid post-end rot from moisture.

  • Attaches a post to existing concrete for decks, patio covers and other top-supported structures
  • Features 1 in. standoff to help prevent rot at post end
  • Slotted for adjustability
  • Designed for versatility, cost-effectiveness and maximum uplift performance
  • Nominal Post Size: 4 in. x 4 in.
  • Made from 16-Gauge steel
  • Z-MAX galvanization offers extra corrosion resistance for exterior and treated-wood applications
  • Install with 10d common nails or #9 x 1-1/2 in. Strong-Drive SD screws

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Base Type 
Adjustable Base 
Number of Pieces 
Product Weight (lb.) 
0.81 lb 
Warranty / Certifications
Manufacturer Warranty 
Visit our website at and type in warranty in the search box for detailed warranty information 


Rated 4.5 out of 5 by 44 reviewers.
Rated 5.0 out of 5.0 by A great post anchor when you can't 'go to ground'! When you are trying to make a firm upright connection to a flat surface this is a great fix! It mounts to both surfaces securely and makes a stable post for your project. August 19, 2015
Rated 5.0 out of 5.0 by Just what I needed. I used two of these to anchor the stair rail posts at the base of stairs to a new deck I built. I also have angle ties anchoring the stair stringers to the concrete pad on the other side. By tying the posts to the post base and the stringers it made everything very sturdy. December 30, 2014
Rated 3.0 out of 5.0 by did the job but would have preferred something a little more substantial while this item did what I wanted- anchor a 4x4 post on a masonry column the metal was rather light weight and I felt the price was on the heavy weight side. The ones I purchased in the past were heavier gauge metal and had a larger range to adjust the position to the mounting bolt. September 12, 2015
Rated 5.0 out of 5.0 by ABA 4x4 ZMAX Galvanized Adjustable Post Base These bases were so easy to use. They are very sturdy and stable to use. September 9, 2015
Rated 2.0 out of 5.0 by Not good for a fence I see a lot of people recommending this for decks, it's definitely not sturdy enough for a fence. Used the to put up a 4 ft fence and the fence moves quite a bit. The metal is not strong enough to support the post the same way that burying them into the concrete would. August 3, 2015
Rated 4.0 out of 5.0 by necessary for post could use a slot on one side to work a wrench on nut , this only necessary when you are replacing existing rotted out older post base. August 25, 2015
Rated 4.0 out of 5.0 by Worked Even tho the posts have other anchoring and are treated, I used these to elevate them from standing in the water. October 12, 2014
Rated 5.0 out of 5.0 by They do the Job! The adjustable post bases are a great product. They get the wood off the ground and are very durable. Though there is minimal adjustability, there is enough if you have set your bolts well from the beginning, you can get everything lines up straight at the end. August 18, 2015
  • 2015-10-03T12:13:59.339-05:00
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