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ABW Adjustable Post Base with Wind Uplift

ABW

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The ABW is designed to attach wooden posts to existing concrete in medium-capacity applications. The built-in 1" standoff of this adjustable post base helps to prevent rot at the end of the post. The ABW 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) or load transfer plate(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 standoff base and then the post in the ABW and fasten on three vertical sides, using nails or Strong-Drive SD Connector screws.
  • Bend up the fourth side and fasten using the correct fasteners.

Related Literature

Wood Construction Connectors 2021-2023
C-C-2021
A catalog including new product information as well as any applicable specification and installation instructions for wood-to-wood and wood-to-concrete structural connectors.
Catalog
Conectores para la construcción con madera 2019–2020
C-C-2019SP
El catálogo incluye información sobre nuevos productos, así como especificaciones e instrucciones de instalación aplicables para conectores estructurales de madera a madera y de madera a concreto.
Catalog
Deck Connection and Fastening Guide
F-DECKCODE20
A guide to recognizing deck deficiencies and building or retrofitting safer, longer-lasting outdoor decks, with 2018 IBC and IRC code-compliant solutions for using the latest connectors and fasteners.
Product Guide
Hollowed Out and Loaded Up — Load-Rated Solutions for Securing Laminated Timber Columns from Culpeper
S-C-CULPEPER19
A sales sheet featuring a SKU list of post bases and caps that have been tested and assigned load values for use with Culpeper Columns.
Flier
Wrap Post Bases in Style; Bring the beauty of Outdoor Accents® to any project
F-C-OAAPBDW21
A flier providing product information about the new Outdoor Accents® post base decorative wrap that adds a finishing style to compatible post bases, including MPBZ, CBSQ, ABUZ, ABWZ and ABAZ.
Flier
Connection Solutions to Meet the DCA6 Prescriptive Residential Wood Deck Construction Guide
T-C-DCA6DECK21
A technical bulletin providing Simpson Strong-Tie connector, fastener and anchor solutions to meet the DCA6 provisions of the 2015 IRC for single-level, residential wood decks.
Technical Bulletin
Connectors Installed on SCL Columns
T-C-SCLCLM21
A technical bulletin discussing the structural properties of the two different surface sides of SCL columns.
Technical Bulletin
Connectors Installed on SCL Columns
T-C-SCLCLMCAN20
A Canadian Limit States technical bulletin addressing typical installations of Simpson Strong-Tie® connectors on SCL columns as well as reduction factors for narrow-face SCL installations.
Technical Bulletin
ZMAX® Post Bases Installed with Stainless-Steel Titen HD® Heavy-Duty Screw Anchors
L-PBTHDSS20
Simpson Strong-Tie ZMAX-coated post bases (including Outdoor Accents®) may be installed with stainless-steel Titen HD screw anchors.
Engineering Letter

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.
ABW44RZ Rough 4x4 16 4 1 15/16 4 1/16 ZMAX® 1
ABW44Z 4x4 16 3 9/16 2 1/4 3 9/16 ZMAX® 1
ABW46RZ Rough 4x6 Base 12; strap 16 4 2 13/16 6 ZMAX® 1
ABW46Z 4x6 Base 12; strap 16 3 9/16 3 5 9/16 ZMAX® 1
ABW66RZ Rough 6x6 Base 12; strap 14 6 2 13/16 6 ZMAX® 1
ABW66Z 6x6 Base 12; strap 14 5 1/2 3 5 9/16 ZMAX® 1
ABW7-7Z 7 1/8 x 7 1/8 Base 12; strap 14 7 5/16 3 7 5/16 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)
ABW44Z 4x4 16 16 3 9/16 3 9/16 2 1/4 1/2 (8) 0.148 x 3 1,005 7,180
ABW44RZ Rough 4x4 16 16 4 4 1/16 1 15/16 1/2 (8) 0.148 x 3 835 7,180
ABW46Z 4x6 12 16 3 9/16 5 9/16 3 1/2 (10) 0.148 x 3 845 4,590
ABW46RZ Rough 4x6 12 16 4 6 2 13/16 1/2 (10) 0.148 x 3 780 4,590
ABW66Z 6x6 12 14 5 1/2 5 9/16 3 1/2 (12) 0.148 x 3 1,190 12,935
ABW66RZ Rough 6x6 12 14 6 6 2 13/16 1/2 (12) 0.148 x 3 1,190 12,935
ABW7-7Z 7 1/8 x 7 1/8 12 14 7 5/16 7 5/16 3 1/2 (12) 0.148 x 3 840 14,530
  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. See technical bulletin T-C-SCLCLM for more information.
  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

    These products are available with additional corrosion protection.

Model No. Nominal Post Size Fastener Allowable Loads (DF/SP)
Anch. Dia. Post Uplift (160) Down (100)
Screws
ABW44Z 4x4 1/2 8-SD9112 1105 7180
ABW44RZ Rough 4x4 1/2 8-SD9112 845 7180
ABW46Z 4x6 1/2 10-SD9112 940 4590
ABW46RZ Rough 4x6 1/2 10-SD9112 845 4590
ABW66Z 6x6 1/2 12-SD9112 1225 12935
ABW66RZ Rough 6x6 1/2 12-SD9112 1190 12935

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT

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