The Simpson Strong-Tie RCKW 3-in. Two-Anchor Kneewall Connector Clip is a heavy 171 mil (7 ga.) rigid connector engineered to resist overturning moment at the base of exterior kneewalls and parapets, as well as interior partial-height walls and overhead ribbon window conditions. Its unique anchor-hole pattern accommodates anchorage to both concrete and structural steel, making it a dependable choice for demanding lateral-load transfer applications in commercial and residential construction.

Key Features

• Two large-diameter anchor holes, one on each end - increases anchorage capacity over single-anchor designs, giving you a stronger, more secure connection at each installation point.
• Stiffened flanges on the anchorage legs - significantly improve overturning moment resistance, keeping the connector rigid under lateral and rotational loads where it matters most.
• Large-diameter holes sized for 1/2-in. anchors - compatible with 1/2-in. diameter concrete screw anchors and wedge anchors, including the Simpson Strong-Tie Titen HD heavy-duty screw anchor and the Strong-Bolt 2 wedge anchor, so you can use proven fastening systems without modification.
• Unique small and large anchor-hole pattern - permits anchorage to both concrete and structural steel, expanding the range of substrates you can work with on a single project.
• 171 mil (7 ga.) steel construction - heavy-gauge thickness delivers the rigidity required for structural moment connections, reducing flex under load.
• G90 zinc galvanized finish - provides corrosion resistance suited to exterior kneewall and parapet applications where moisture exposure is a real concern.
• Compatible with the optional RCKW3DS stiffener - when load demands exceed the clip alone, the stiffener nests directly onto the connector with aligned screw and anchor holes, making the upgrade straightforward and keeping installation efficient.

Why This Product

• Purpose-built for kneewall and parapet moment resistance - unlike general-purpose framing connectors, the RCKW was specifically developed to handle overturning forces at the base of exterior kneewalls, parapets, interior partial-height walls, and overhead ribbon window conditions, addressing a structural challenge that standard hardware is not designed for.
• Scalable load capacity in one connector family - the RCKW3D can be upgraded simply by nesting the optional RCKW3DS stiffener onto the clip, with screw and anchor holes that line up automatically, so you get added capacity without switching to a completely different connector.
• Broad substrate compatibility reduces on-site complexity - the dual anchor-hole pattern accommodates both concrete and structural steel anchorage, meaning one connector model can be used across mixed-substrate conditions rather than sourcing separate hardware for each situation.
• Heavy-gauge, corrosion-resistant construction built for exterior exposure - the combination of 171 mil (7 ga.) steel and G90 galvanized coating means the connector maintains structural integrity in the moisture-prone exterior locations where kneewalls and parapets are most commonly found.

Specifications

• Model Number: RCKW3D-R10
• Width: 3 in.
• Thickness: 171 mil
• Gauge: 7 ga.
• Coating / Finish: Zinc Galvanized, G90
• Anchor Hole Diameter: 1/2 in. (large-diameter)
• Number of Anchor Holes: 2 (one on each end)
• Package Quantity: 10 clips
• Country of Origin: United States

Approved Applications

• Resisting overturning moment at the base of exterior kneewalls
• Structural connections at the base of parapets
• Interior partial-height walls requiring moment resistance at the base
• Overhead ribbon window conditions where lateral loads must be transferred
• Anchorage to concrete using 1/2-in. diameter concrete screw anchors or wedge anchors
• Anchorage to structural steel via the unique small and large anchor-hole pattern

What's Included

• 10x Simpson Strong-Tie RCKW3D 3-in. Two-Anchor Kneewall Connector Clips

Fasteners, anchors, and the optional RCKWS stiffener are sold separately. The RCKW clip and RCKWS stiffener are sold separately.

Installation Notes

Use all specified screws and anchors during installation. For greater load capacity, the optional RCKW3DS stiffener nests directly onto the RCKW clip. The screw holes and anchor holes in the stiffener align with those in the RCKW clip, making fastener and anchor installation straightforward. The RCKW