ABA Adjustable Post Base
Product Details
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.
This post base is available in model sizes for double 2x, 4x4, 4x6 and 6x6 lumber, both nominal and rough. The new double 2x size can be used for installing a structural post consisting of two 2x4 studs nailed together as well as for securing double 2x beams to a footing for ground-level decks.
Key Features
- The slot in the base enables flexibility around the anchor bolt, making precise post placement easier
- 1" standoff 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
| Model No. | Nominal Post Size | Ga. | W (in.) | L (in.) | H (in.) | Coating/Material | Packaging Qty. |
|---|---|---|---|---|---|---|---|
| ABA24-2Z | Double 2x4 | 16 | 3 1/8 | 3 3/8 | 3 1/8 | ZMAX® | 1 |
| ABA44RZ | 4x4 rough | 16 | 4 1/16 | 3 1/8 | 2 13/16 | ZMAX® | 1 |
| ABA44Z | 4x4 | 16 | 3 9/16 | 3 3/8 | 3 1/16 | ZMAX® | 1 |
| ABA46RZ | 4x6 rough | 14 | 4 1/16 | 5 3/16 | 2 7/8 | ZMAX® | 1 |
| ABA46Z | 4x6 | 14 | 3 9/16 | 5 3/16 | 3 1/8 | ZMAX® | 1 |
| ABA66RZ | 6x6 rough | 14 | 6 | 5 3/16 | 2 7/8 | ZMAX® | 1 |
| ABA66Z | 6x6 | 14 | 5 1/2 | 5 3/8 | 3 1/8 | 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) | ||||
|---|---|---|---|---|---|---|---|---|---|
| W | L | H | Anchor Dia. (in.) | Nails (in.) | Uplift (160) | Down (100) | |||
| ABA24-2Z | Double 2x4 | 16 | 3 1/8 | 3 3/8 | 3 1/8 | 1/2 | (6) 0.148 x 3 | 630 | 5,925 |
| ABA44Z | 4x4 | 16 | 3 9/16 | 3 3/8 | 3 1/16 | 1/2 | (6) 0.148 x 3 | 690 | 5,925 |
| ABA44RZ | Rough 4x4 | 16 | 4 1/16 | 3 1/8 | 2 13/16 | 1/2 | (6) 0.148 x 3 | 655 | 7,215 |
| ABA46Z | 4x6 | 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 | 4 1/16 | 5 3/16 | 2 7/8 | 5/8 | (8) 0.162 x 3 1/2 | 870 | 10,695 |
| ABA66Z | 6x6 | 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 | 6 | 5 3/16 | 2 7/8 | 5/8 | (8) 0.162 x 3 1/2 | 850 | 11,500 |
- Uplift loads have been increased for earthquake or wind loading with no further increase allowed. Reduce where other loads govern.
- Downloads may not be increased for short-term loading.
- Specifier is to design concrete and anchorage for uplift capacity.
- For higher downloads, pack grout solid under 1" standoff plate before installation. Base download on column or concrete, according to the code.
- 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 capacity of the post.
- 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.
Allowable Loads — Post Installation 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 (160) | Download (100) | |
| ABA24-2Z | 3 1/8 | 3 3/8 | 3 1/8 | 1/2 | 6-SD9212 | 685 | 5,925 |
| 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 |
- 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.
- Anchor bolts and concrete footings must be capable of resisting all loads and forces transferred from the post base connector.
Allowable Loads — Beam Installation
| Model No. | Nominal Beam Size | Material (ga.) | Dimensions (in.) | Fasteners (in.) | Allowable Loads (DF/SP) | Allowable Loads (SPF/HF) | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| W | L | H | Anchor Dia. (in.) | Beam | Uplift (160) | Down (100) | Uplift (160) | Down (100) | |||
| ABA24-2Z | Double 2x | 16 | 3 1/8 | 3 3/8 | 3 1/8 | 1/2 | (6) 0.148 x 3 | 640 | 4,425 | 585 | 3,140 |
| 1/2 | (6) SD9212 | 725 | 4,335 | 625 | 3,060 | ||||||
- Uplift loads have been increased for earthquake or wind loading with no further increase allowed. Reduce where other loads govern.
- Downloads may not be increased for short-term loading.
- Specifier is to design concrete and anchorage for uplift capacity.
- Fasteners: Nail dimensions are listed diameter by length. See Wood Construction Connectors catalog for fastener information.
Code Reports & Compliance
Drawings
| DWG | DXF | RFA | IFC | SAT | |||
|---|---|---|---|---|---|---|---|
