ABW Adjustable Post Base with Wind Uplift
On This Page
Product Details
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
Product Information Table
| 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 |
- 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. See technical bulletin T-C-SCLCLM for more information.
- 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.
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
| DWG | DXF | RFA | IFC | SAT | |||
|---|---|---|---|---|---|---|---|
