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Description
Simpson Strong-Tie SSW21-2KT Strong-Wall Steel Two-Story Stacked-Wall Connection Kit for High Load Multi-Story ApplicationsSimpson Strong Tie SSW21 2KT Description The Steel Strong Wall Two Story Stacked Wall Connection Kit is designed for high load multi story applications, providing reliable structural support and ease of installation. Simpson Strong Tie SSW21 2KT Includes (1) Shear Transfer Plate with #14 Self Drilling Screws (2) 1" x 48" Threaded Rods F1554 Grade 36 (6) Heavy Hex Nuts Installation Instructions Simpson Strong Tie SSW21 2KT Features Some of the highest
Simpson Strong-Tie SSW21-2KT Description
The Steel Strong-Wall Two-Story Stacked-Wall Connection Kit is designed for high load multi-story applications, providing reliable structural support and ease of installation.
Simpson Strong-Tie SSW21-2KT Includes
- (1) Shear-Transfer Plate with #14 Self-Drilling Screws
- (2) 1" x 48" Threaded Rods F1554 Grade 36
- (6) Heavy Hex Nuts
- Installation Instructions
Simpson Strong-Tie SSW21-2KT Features
- Some of the highest loads in the industry, and design procedures that account for cumulative overturning
- No bearing plates to install; walls can be placed flush against a corner
- Compression loads transferred by nut and rod, reducing wood crushing under load
Simpson Strong-Tie SSW21-2KT Applications
- Two-Story Stacked on Concrete Foundation
Simpson Strong-Tie SSW21-2KT Installation Overview
- Drill or notch subfloor to allow compression nuts to sit flush with underside of Steel Strong-Wall (SSW)
- Drill holes in first-story top plates to allow threaded rod to pass through
- Install threaded rods and nuts in lower Steel Strong-Wall
- Extend threaded rod through lower wall and floor system into upper wall
- Install solid blocking under center and each end of SSW per designer
- Place SSW over threaded rod and secure with anchor nuts included in SSW kit
- Attach shear transfer plate to upper SSW with supplied #14 self-drilling screws, and to rim joist with 0.148" x 3" nails
- Complete assembly with A34 angles (sold separately) per designer
- Attach SSW to top plates or header with Strong-Drive SDS screws (supplied)
Simpson Strong-Tie SSW21-2KT Specifications
| Application | Two-Story Stacked on Concrete Foundation |
| API Approval | Approved - Full |
| Wall Width (in.) | 21 |
NOTE: Two heavy hex nuts included with each wall.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 11 reviews
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Product Reviews
★★★★★ 5
Looks nice, easy to install
Color: Rustic Brown, Number Of Shelves: 2, Size: 22in
This shelf is lightweight, looks nice, and was easy to install. It comes with a little level to help you install it properly. There are plenty of mounting holes to choose from, so it is easy to screw it directly into a stud, or to just use holes that are convenient for you. It comes with a plethora of mounting hardware.
I mounted mine a bit high up and chose to mount it upside down so that I wouldn't see the three screws that hold the shelf to the mounting bracket.
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Reviewed in the United States on April 8, 2026
★★★★★ 5
Great shelf
Color: Rustic Brown, Size: 31.5 Inch, Color: Rustic Brown, Size: 31.5 Inch
For someone who has ZERO counter space and a ton of empty wall space, this is PERFECT!
The install was easier then expected (if I installed it right because I’m just a girl) but very eye appealing, great for storage and decoration, great deal for the price!
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Looks great in my window
Color: Rustic Brown, Size: 31.5 Inch, Color: Rustic Brown, Size: 31.5 Inch
Fits pretty well, had to slightly put it in an angle for it to fit on the frame of the window, overall easy to put together and looks great
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Reviewed in the United States on April 9, 2026
★★★★★ 5
Wall shelf
Color: Rustic Brown, Size: 31.5 Inch, Color: Rustic Brown, Size: 31.5 Inch
Nice shelf. Easy to assemble.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Nice and sturdy
Very easy to assemble and sturdy. Exactly what we were looking for.
The only complaint is that the anchors that came with it did not work properly, we used our own.
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Reviewed in the United States on November 23, 2025