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.
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
- ZMAX® coating and some in stainless steel; 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.
ABW
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
– 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 Connector screws or bolts (ABU88Z, ABU1010Z, ABU1212Z – SDS optional)
ABA
Place the post in the ABA
– Fasten using nails or Strong-Drive SD Connector screws
Related Literature
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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.
- 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, ABU1010RZ, and ABU1212Z/RZ may be installed with (8) 1/4" x 3" 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) | ||||||||
| 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 |
|---|---|---|---|---|
| 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 | 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 | |
| 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. | |||
| ABU1212RZ | Submitted for listing: Please contact us for status and test data. | |||
| ABU1212Z | Submitted for listing: Please contact us for status and 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 | |
| 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. | |||
| 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 | |||
| ABW7-7Z | No code listing: Please contact us for test data. | |||
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 |
|---|---|---|
| ABA44RZ | None | None |
| ABA44Z | ||
| ABA46R | None | |
| ABA46Z | None | |
| ABA66RZ | None | |
| ABA66Z | None | |
| ABU1010RZ | ||
| ABU1010Z | ||
| ABU1212RZ | ||
| ABU1212Z | ||
| ABU44RZ | ||
| ABU44Z | ||
| ABU46RZ | ||
| ABU46Z | None | |
| ABU5-5 | None | None |
| ABU5-6 | None | None |
| ABU66RZ | ||
| ABU66Z | ||
| ABU88R | None | |
| ABU88Z | ||
| ABW44RZ | ||
| ABW44Z | ||
| ABW46RZ | ||
| ABW46Z | ||
| ABW66RZ | ||
| ABW66Z | ||
| ABW7-7Z |
