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ABA/ABU/ABW Adjustable and Standoff Post Bases

ABA/ABU/ABW

The AB series of retrofit adjustable post bases provide a 1" standoff for the post, are slotted for adjustability and can be installed with nails, Strong-Drive® SD Connector screws or bolts (ABU). Depending on the application needs, these adjustable standoff post bases are designed for versatility, cost-effectiveness and maximum uplift performance.

Key Features

  • The slot in the base enables flexible positioning around the anchor bolt, making precise post placement easier
  • The 1" standoff helps prevent rot at the end of the post and meets code requirements for structural posts installed in basements or exposed to weather or water splash

Material

Varies (see model table)

Finish

All galvanized, most offered in ZMAX® coating. See Corrosion Information.

Installation

  • Use all specified fasteners. See General Notes.
  • See our Anchoring and Fastening Systems for Concrete and Masonry catalog for retrofit anchor options or reference technical bulletin Anchoring Solutions for Simpson Strong-Tie® Connectors in Wind and Low-Seismic Regions (T-ANCHORSPEC).
  • 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, load transfer plate and nut on the anchor bolt. Loosely tighten the nut.
  • Some products may be installed with the Strong-Drive® SD Connector screw. See model table.
  • View step-by-step installation instructions in the Installer's Pocket Guide (S-C-INSTALL).

ABW
– Place the standoff base and then the post in the ABW and fasten on three vertical sides, using nails or Strong-Drive SD structural-connector screws.
– Make any necessary adjustments to post placement and tighten the nut securely on the anchor bolt.
– Bend up the fourth side of the ABW and fasten using the correct fasteners.

ABU
– Place the standoff base and then the post in the ABU.
– Fasten using nails or Strong-Drive SD structural connector screws or bolts (ABU88, ABU1010 – SDS optional).

ABA
– Place the post in the ABA.
– Fasten using nails or Strong-Drive SD Screws.

Options

Additional standoff bases available. See CPS/PBV.

Related Literature

Load Tables

Load Values with Nails

    These products are available with additional corrosion protection. Additional products on this page may also be available with this option, check with Simpson Strong-Tie for details.

   These models are approved for installation with the Strong-Drive® SD Connector screw. See the load values below.

  1. Uplift loads have been increased for wind or earthquake with no further increase allowed; reduce where other loads govern.
  2. Downloads may not be increased for short-term loading.
  3. Specifier to design concrete for uplift capacity.
  4. ABU products may be installed with either bolts or nails (not both) to achieve table loads. ABU88Z, ABU88R, ABU1010Z and ABU1010RZ may be installed with 8-1⁄4"x3" Strong-Drive® SDS Heavy-Duty Connector screws (sold separately) for the same table load.
  5. For AB bases, higher download can be achieved by solidly packing grout under 1" standoff plate before installation. Base download on column, grout, or concrete according to the code.
  6. HB dimension is the distance from the bottom of the post up to the first bolt hole.
  7. 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.
  8. Downloads shall be reduced where limited by the capacity of the post. See Post Capacities for common post allowable loads.
  9. NAILS: 16d = 0.162" dia. x 3 1/2" long, 10d = 0.148" dia. x 3" long. See other nail sizes and information.
Load Values with Strong-Drive® SD Connector Screws
Model No. Nominal Post Size Fastener Allowable Loads (DF/SP)
Anch. Dia. Post Uplift (160) Down (100)
Screws

    These products are available with additional corrosion protection. Additional products on this page may also be available with this option, check with Simpson Strong-Tie for details.

ABA44Z 4x4 1/2 6-SD9112 610 6000
ABW44Z 4x4 1/2 8-SD9112 1105 7180
ABU44 4x4 5/8 12-SD10112 2140 6665
ABA44R Rough 4x4 1/2 6-SD9112 610 8000
ABW44RZ Rough 4x4 1/2 8-SD9112 845 7180
ABW46Z 4x6 1/2 10-SD9112 940 4590
ABA46Z 4x6 5/8 8-SD10112 940 9435
ABW46RZ Rough 4x6 1/2 10-SD9112 845 4590
ABA66Z 6x6 5/8 8-SD10112 970 10665
ABW66Z 6x6 1/2 12-SD9112 1225 12935
ABA66R Rough 6x6 5/8 8-SD10112 970 12665
ABW66RZ Rough 6x6 1/2 12-SD9112 1190 12935

Code Reports

Part IAPMO UES ER ICC-ES ESR City of Los Angeles State of Florida
ABASee specific model numbers for code listings.
ABA44RZ No code listing. Please contact us for test data.
ABA44Z ESR-1622 ESR-2523 ESR-3096 RR25910 FL10860
ABA46R ESR-1622 ESR-2523 ESR-3096 RR25910 FL10860
ABA46Z ESR-1622 ESR-2523 ESR-3096 RR25910 FL10860
ABA66RZ No code listing. Please contact us for test data.
ABA66Z ESR-1622 ESR-2523 ESR-3096 RR25910 FL10860
ABUSee specific model numbers for code listings.
ABU1010RZ No code listing. Please contact us for test data.
ABU1010Z No code listing. Please contact us for test data.
ABU44Z ESR-1622 ESR-2523 ESR-3096 RR25712 RR25910 FL10860
ABU46RZ No code listing. Please contact us for test data.
ABU46Z ESR-1622 ESR-2523 RR25712 FL10860
ABU5-5 No code listing. Please contact us for test data.
ABU5-6 No code listing. Please contact us for test data.
ABU66RZ No code listing. Please contact us for test data.
ABU66Z ESR-1622 ESR-2523 RR25712 FL10860
ABU88RNo code listing: Please contact us for test data.
ABU88Z No code listing. Please contact us for test data.
ABWSee specific model numbers for code listings.
ABW44RZ ESR-1622 ESR-2523
ABW44Z ESR-1622 ESR-2523
ABW46RZ ESR-1622 ESR-2523
ABW46Z ESR-1622 ESR-2523
ABW66RZ ESR-1622 ESR-2523
ABW66Z ESR-1622 ESR-2523

ESR-2523 is an Index of many of Simpson Strong-Tie Stamped and Welded Cold-formed Steel Products for Wood or Cold-formed Steel Construction

Drawings

Part Orthographic Perspective
ABANone None
ABA44RZNone None
ABA44ZNone None
ABA46R
ABA46R
DWGDXF
ABA46R front view
DWG DXF
ABA46R right view
DWG DXF
ABA46R top view
DWG DXF
None
ABA46ZNone None
ABA66RZNone None
ABA66ZNone None
ABUNone None
ABU1010RZ
ABU1010RZ front view
DWG DXF
ABU1010RZ right view
DWG DXF
ABU1010RZ top view
DWG DXF
ABU1010RZ
DWG DXF
ABU1010Z
ABU1010Z front view
DWG DXF
ABU1010Z right view
DWG DXF
ABU1010Z top view
DWG DXF
ABU1010Z
DWG DXF
ABU44RZ
ABU44RZ bottom view
DWG DXF
ABU44RZ front view
DWG DXF
ABU44RZ left view
DWG DXF
ABU44RZ right view
DWG DXF
ABU44RZ top view
DWG DXF
ABU44RZ
DWG DXF
ABU44ZNone None
ABU46RZ
ABU46RZ bottom view
DWG DXF
ABU46RZ front view
DWG DXF
ABU46RZ left view
DWG DXF
ABU46RZ right view
DWG DXF
ABU46RZ top view
DWG DXF
ABU46RZ
DWG DXF
ABU46ZNone None
ABU5-5None None
ABU5-6None None
ABU66RZ
ABU66RZ bottom view
DWG DXF
ABU66RZ front view
DWG DXF
ABU66RZ left view
DWG DXF
ABU66RZ right view
DWG DXF
ABU66RZ top view
DWG DXF
ABU66RZ
DWG DXF
ABU66ZNone None
ABU88R
ABU88R
DWGDXF
ABU88R front view
DWG DXF
ABU88R left view
DWG DXF
ABU88R right view
DWG DXF
ABU88R top view
DWG DXF
None
ABU88ZNone None
ABWNone None
ABW44RZ
ABW44RZ front view
DWG DXF
ABW44RZ right view
DWG DXF
ABW44RZ top view
DWG DXF
ABW44RZ
DWG DXF
ABW44Z
ABW44Z front view
DWG DXF
ABW44Z right view
DWG DXF
ABW44Z top view
DWG DXF
ABW44Z
DWG DXF
ABW46RZ
ABW46RZ front view
DWG DXF
ABW46RZ right view
DWG DXF
ABW46RZ top view
DWG DXF
ABW46RZ
DWG DXF
ABW46Z
ABW46Z front view
DWG DXF
ABW46Z right view
DWG DXF
ABW46Z top view
DWG DXF
ABW46Z
DWG DXF
ABW66RZ
ABW66RZ front view
DWG DXF
ABW66RZ right view
DWG DXF
ABW66RZ top view
DWG DXF
ABW66RZ
DWG DXF
ABW66Z
ABW66Z front view
DWG DXF
ABW66Z right view
DWG DXF
ABW66Z top view
DWG DXF
ABW66Z
DWG DXF