Product Description
The Simpson RCKW3DS-R10 3-in. Two-Anchor Kneewall Connector Stiffener is a heavy 171 mil (7 ga.) rigid stiffener from Simpson engineered to nest directly onto the RCKW clip and deliver added capacity when standard connector loads are exceeded. Designed for use at the base of exterior kneewalls, parapets, interior partial-height walls, and overhead ribbon window conditions, this stiffener's screw holes and anchor holes align precisely with those in the RCKW clip - making fastener and anchor installation straightforward without special modification. This pack contains 10 stiffeners, ready for demanding structural applications.
Key Features
- Two large anchor holes, one on each end - increases anchorage capacity at both anchorage points, giving installers greater load distribution where overturning forces are highest
- Stiffened flanges on anchorage legs - improves overturning moment resistance at the wall base, helping the connection perform under demanding lateral load conditions
- Compatible with 1/2-in. diameter concrete screw anchors and wedge anchors - works with Simpson Strong-Tie Titen HD heavy-duty screw anchors and Strong-Bolt 2 wedge anchors, giving specifiers proven, tested anchor options
- 171 mil (7 ga.) steel construction secured to the RCKW clip with screws - nesting fit and screw-fastened attachment optimize stiffness and overturning moment resistance without adding bulk or complexity
- G90 zinc galvanized finish - provides corrosion resistance suited to exterior and exposed-framing applications such as kneewalls and parapets
- Hole pattern aligns with the RCKW clip - eliminates field drilling or adjustment, reducing installation time and the risk of misalignment on the job
Why This Product
- Purpose-built capacity upgrade for the RCKW system - when load demands exceed what the standard RCKW clip alone can handle, the RCKW3DS stiffener nests directly onto it and is secured with screws, restoring adequate overturning moment resistance without replacing the base connector
- Versatile anchorage to concrete - the two large-diameter anchor holes accept 1/2-in. diameter concrete screw anchors and wedge anchors, making this stiffener practical across a range of kneewall, parapet, and partial-height wall conditions where concrete substrate anchorage is required
- Heavy-gauge steel where it matters most - at 171 mil (7 ga.), this stiffener brings meaningful rigidity to connections at exterior kneewalls and overhead ribbon window framing, applications where thin connectors can compromise structural performance under overturning forces
- Drop-in installation with no field modification - the screw holes and anchor holes in the stiffener line up with those already in the RCKW clip, so installers can fasten and anchor without cutting, drilling, or adapting hardware on site
Specifications
- MPN: RCKW3DS-R10
- Brand: Simpson Strong-Tie
- Width: 3 in.
- Thickness: 171 mil
- Gauge: 7
- Coating/Finish: Zinc Galvanized, G90
- Anchor Holes: (2) large-diameter holes accommodating 1/2-in. diameter anchors
- Quantity: 10
- Country of Origin: United States
Approved Applications
- Base of exterior kneewalls requiring overturning moment resistance
- Parapets requiring overturning moment resistance
- Interior partial-height wall conditions
- Overhead ribbon window conditions
- Anchorage to concrete using 1/2-in. diameter concrete screw anchors or wedge anchors
Related Products
Note: Use in conjunction with the RCKW3D; use all specified screws and anchors. The RCKW clip and RCKWS stiffener are sold separately.
Frequently Asked Questions
What is the purpose of the RCKWS stiffener and when should it be used?
The RCKWS stiffener is designed to add capacity to the RCKW clip when load demands exceed the standard connector's capability. The 171 mil (7 ga.) stiffener nests onto the RCKW clip and is secured with screws, optimizing overturning moment resistance and stiffness at the base of exterior kneewalls, parapets, interior partial-height walls, and overhead ribbon window conditions.
What type and size of anchors are compatible with the RCKW3DS stiffener?
The RCKW3DS stiffener features (2) large-diameter anchor holes that accommodate 1/2-in. diameter concrete screw anchors and wedge anchors, such as the Simpson Strong-Tie Titen HD heavy-duty screw anchor and the Strong-Bolt 2 wedge anchor.
Does the RCKWS stiffener include the RCKW clip, and what connector should it be used with?
The RCKW clip and RCKWS stiffener are sold separately. The RCKW3DS stiffener must be used in conjunction with the RCKW3D clip, along with all specified screws and anchors.
How does the G90 galvanized coating benefit the RCKW3DS stiffener?
The Zinc Galvanized, G90 coating provides corrosion resistance, helping to maintain the structural integrity and longevity of the stiffener in demanding installation environments.
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