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ABA Adjustable Post Base

ABA

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The ABA is designed to attach wooden posts to existing concrete. The built-in 1" standoff of this adjustable post base helps to prevent rot at the end of the post. The ABA has a slotted anchor hole in the base for adjustability and attaches to the post with nails or Strong-Drive® SD Connector screws. This versatile post base makes a cost-effective option for securing a post to the foundation.

Key Features

  • The slot in the base enables flexibility around the anchor bolt, making precise post placement easier
  • 1" stand-off design meets code requirements for structural posts installed in basements or exposed to weather or water splash
  • Increased uplift loads for earthquake or wind loading

Material

  • See table

Finish

  • ZMAX®; see Corrosion Information

Installation

  • Use all specified fasteners; see General Notes.
  • See our Anchoring, Fastening and Restoration Systems for Concrete and Masonry catalog for retrofit anchor options, such as Titen HD®, Stainless-Steel Titen HD or SET-3G™.
  • Post bases do not provide adequate resistance to prevent members from rotating about the base and therefore are not recommended for non-top-supported installations (such as fences or unbraced carports).
  • Place the base, cut washer(s) and nut(s) on the anchor bolt(s). Make any necessary adjustments to post placement and tighten the nut securely on the anchor bolt.
  • Place the post in the ABA and fasten using nails or Strong-Drive SD Connector screws.

Related Literature

Product Information Table

Fastener Production Information and Stuff & Things
Model No. Nominal Post Size Ga. W (in.) H (in.) L (in.) Coating/Material Packaging Qty.
ABA44RZ 4x4 rough 16 4 1/16 2 13/16 3 1/8 ZMAX® 1
ABA44Z 4x4 16 3 9/16 3 1/16 3 3/8 ZMAX® 1
ABA46RZ 4x6 rough 14 4 1/16 2 7/8 5 3/16 ZMAX® 1
ABA46Z 4x6 14 3 9/16 3 1/8 5 3/16 ZMAX® 1
ABA66RZ 6x6 rough 14 6 2 7/8 5 3/16 ZMAX® 1
ABA66Z 6x6 14 5 1/2 3 1/8 5 3/8 ZMAX® 1

Load Tables

Allowable Loads — Post Installation

    These products are available with additional corrosion protection.

    Many of these products are approved for installation with Strong-Drive® SD Connector screws.

Model No. Nominal Post Size Material (ga.) Dimensions (in.) Fasteners Allowable Loads (DF/SP)
Base Strap W L H Anchor Dia. (in.) Nails (in.) Uplift Down (100)
ABA44Z 4x4 16 16 3 9/16 3 3/8 3 1/16 1/2 (6) 0.148 x 3 690 5,925
ABA44RZ Rough 4x4 16 16 4 1/16 3 1/8 2 13/16 1/2 (6) 0.148 x 3 655 7,215
ABA46Z 4x6 14 14 3 9/16 5 3/16 3 1/8 5/8 (8) 0.162 x 3 1/2 870 10,500
ABA46RZ Rough 4x6 14 14 4 1/16 5 3/16 2 7/8 5/8 (8) 0.162 x 3 1/2 870 10,695
ABA66Z 6x6 14 14 5 1/2 5 3/8 3 1/8 5/8 (8) 0.162 x 3 1/2 850 10,245
ABA66RZ Rough 6x6 14 14 6 5 3/16 2 7/8 5/8 (8) 0.162 x 3 1/2 850 11,500
  1. Uplift loads have been increased for earthquake or wind loading with no further increase allowed. Reduce where other loads govern.
  2. Downloads may not be increased for short-term loading.
  3. Specifier is to design concrete and anchorage for uplift capacity.
  4. For higher downloads, pack grout solid under 1" standoff plate before installation. Base download on column or concrete, according to the code.
  5. Structural composite lumber columns have sides that show either the wide face or the edges of the lumber strands/veneers. For SCL columns, the fasteners for these products should always be installed in the wide face.
  6. Downloads shall be reduced where limited by capacity of the post.
  7. Fasteners: Nail dimensions in the table are listed diameter by length. For additional information, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connectors.

Load Values with Strong-Drive® SD Connector Screws

Model No. Dimensions (in.) Fasteners
(Quantity-Size/Type)
Allowable Loads (lbs)1,2
W L H Anchor
Diameter
(in.)
Post Uplift
CD=1.6
Downloads
CD=1.0, CD=1.5, CD=1.25
ABA44 3 9/16 3 1/8 3 1/16 1/2 6-SD9112 610 6,000
ABA44R 4 1/16 3 1/8 2 13/16 1/2 6-SD9112 610 8,000
ABA46 3 9/16 5 3/16 3 1/8 5/8 8-SD10112 940 9,435
ABA46R 4 1/16 5 3/16 2 7/8 5/8 8-SD10112 940 12,000
ABA66 5 1/2 5 1/4 3 1/8 5/8 8-SD10112 970 10,665
ABA66R 6 5 3/16 2 7/8 5/8 8-SD10112 970 12,665
For SI: 1 inch = 25.4 mm, 1 lbf = 4.45 N.
  1. Tabulated allowable loads have been adjusted for load duration factors, CD, as shown, in accordance with the NDS, and are not permitted to be adjusted for other durations.
  2. Anchor bolts and concrete footings must be capable of resisting all loads and forces transferred from the post base connector.

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT