ABA/ABU/ABW Adjustable and Standoff Post Bases
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.
- 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
Varies (see model table)
All galvanized, most offered in ZMAX® coating. See Corrosion Information.
- 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).
– 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.
– 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).
– Place the post in the ABA.
– Fasten using nails or Strong-Drive SD Screws.
Additional standoff bases available. See CPS/PBV.
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Load Values with Nails
These models are approved for installation with the Strong-Drive® SD Connector screw. See the load values below.
- Uplift loads have been increased for wind or earthquake with no further increase allowed; reduce where other loads govern.
- Downloads may not be increased for short-term loading.
- Specifier to design concrete for uplift capacity.
- 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.
- 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.
- HB dimension is the distance from the bottom of the post up to the first bolt hole.
- 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.
- Downloads shall be reduced where limited by the capacity of the post. See Post Capacities for common post allowable loads.
- NAILS: 16d = 0.162" dia. x 3 1/2" long, 10d = 0.148" dia. x 3" long. See other nail sizes and information.
|Model No.||Nominal Post Size||Fastener||Allowable Loads (DF/SP)|
|Anch. Dia.||Post||Uplift (160)||Down (100)|
|Part||IAPMO UES ER||ICC-ES ESR||City of Los Angeles||State of Florida|
|ABA||See specific model numbers for code listings.|
|ABA44RZ||No code listing. Please contact us for test data.|
|ABA44Z||ESR-1622 ESR-2523 ESR-3096||RR25910||FL10849|
|ABA46R||ESR-1622 ESR-2523 ESR-3096||RR25910||FL10849|
|ABA46Z||ESR-1622 ESR-2523 ESR-3096||RR25910||FL10849|
|ABA66RZ||No code listing. Please contact us for test data.|
|ABA66Z||ESR-1622 ESR-2523 ESR-3096||RR25910||FL10849|
|ABU||See 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||FL10849|
|ABU46RZ||No code listing. Please contact us for test data.|
|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.|
|ABU88R||No code listing: Please contact us for test data.|
|ABU88Z||No code listing. Please contact us for test data.|
|ABW||See specific model numbers for code listings.|
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