Message to Our Customers

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 4.6 out of 5 by 36 reviewers.
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 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 Works great Used these post anchors for a pergola I was building on a back yard slab. Drilled 1/2" holes for Red Head wedge inserts, applied post anchors over them and tightened nut to hold in place. Everything worked as expected and posts were securely attached. No surpirises. May 13, 2014
Rated 5.0 out of 5.0 by Best way to anchor posts to concrete Easy to set in the correct position and anchor wooden post December 30, 2014
Rated 5.0 out of 5.0 by I used these galvanized steel supports because I had used them before. They work great and termite proof! I really like these supports for several reasons. First they are very easy to install. The second reason is, I installed them on a concrete base and it was easy to secure them to that base. This securing makes my project very sturdy. Lastly, they keep my wood posts off the ground. If I hadn't used these, my wood would soon rot and termites would soon attack that fresh wood. June 3, 2014
Rated 5.0 out of 5.0 by This product will help insure the integrity of this particular project When I build or repair something the first thing that I require is functionally sound and aesthetically pleasing solutions. This particular bracket has both of these qualities and therefore passed the quality control test. Combined with the pressure treated lumber and deck screws this project is aesthetically pleasing and functionally sound. Our soon to be 15y old dog "Sandy" appreciates this ramp everyday. April 8, 2014
Rated 5.0 out of 5.0 by Sensible & Easy to Use Meets Code for separation of post from concrete in a sensible, easy-to-use manner. Using common sense, it's quick and easy to install this correctly if you have the proper tools for fastening it to the concrete, particularly a hammer drill. It is well-built from heavy-duty galvanized steel and should last for several decades if properly installed. I've used these quite happily on several projects. April 7, 2010
Rated 5.0 out of 5.0 by Strong fast way too put up deck railing. Used this product for securing my 4×4 post too the deck .The design of the product made it quick and easy for me too get it tied in too the deck as well as the side walls of the product walls held it in place ,I was able plum i it up with the pre dilled holes with one hand and with out the help of some one else too hold it in place for me.This product Rocks!! February 3, 2015
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