The Simpson RCKW 5.5 in. 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. Built from thick-gauge steel with a G90 zinc galvanized finish for lasting corrosion resistance, this clip features a unique dual anchor-hole pattern that allows secure anchorage to concrete, structural steel, and CMU - giving contractors the flexibility to work across multiple substrate types with a single connector solution.

Key Features

• Three large holes for one- or two-anchor configurations - the center hole supports a one-anchor solution at the edge or center of slab, while the outer holes enable a two-anchor solution for higher-capacity requirements at the center of slab, giving you flexibility to match the connection to the actual load demand.
• Stiffened flanges on anchorage legs - improve overturning moment resistance, so the clip maintains structural integrity under the lateral forces that kneewall and parapet connections are specifically designed to handle.
• Large-diameter anchor holes sized for 1/2 in. diameter fasteners - accommodate 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, ensuring compatibility with proven high-load anchoring systems.
• Additional smaller-diameter anchor holes for structural steel attachment - allow use of #12 self-drilling screws, so the same clip can transition between concrete and steel substrates without requiring a different connector.
• CMU-compatible hole pattern - attachment to concrete masonry units can be achieved using the Titen HD or Titen Turbo concrete and masonry screw, expanding the range of structural applications this connector covers.
• G90 zinc galvanized finish - provides corrosion resistance suited for exterior applications such as parapets and exterior kneewalls where long-term exposure is a concern.
• Compatible with optional RCKW5.5S stiffener - if load demands exceed the base clip capacity, the RCKWS stiffener nests directly onto the RCKW clip with aligned screw and anchor holes, making it straightforward to upgrade the connection without replacing hardware already in place (stiffener sold separately).

Why This Product

• One connector, multiple substrates - the dual anchor-hole pattern was specifically developed to permit anchorage to both concrete and structural steel, reducing the need to source different clips for different job conditions and simplifying procurement on mixed-substrate projects.
• Heavy-gauge construction purpose-built for moment resistance - at 171 mil (7 ga.) steel with stiffened anchorage flanges, this clip is designed from the ground up to handle the overturning forces present at kneewalls, parapets, and partial-height wall conditions - not a general-purpose clip adapted to the application.
• Scalable capacity without starting over - when a project's load requirements increase, the optional RCKW5.5S stiffener nests onto the existing clip and shares the same hole layout, so upgrading connection capacity is a matter of adding hardware rather than replacing what is already anchored.
• Versatile one- or two-anchor solutions in a single profile - the three-hole layout gives engineers and installers the option to select the anchoring pattern that matches actual capacity requirements, avoiding over-engineering on lower-load connections while still supporting higher-demand configurations on the same clip model.

Specifications

• MPN: RCKW5.5-R10
• Width: 5 1/2 in.
• Thickness: 171 mil
• Gauge: 7
• Coating: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• Quantity: 10
• Country of Origin: United States

Approved Applications

• Resisting overturning moment at the base of exterior kneewalls and parapets
• Interior partial-height wall connections
• Overhead ribbon window conditions
• Anchorage to concrete using 1/2-in. diameter concrete screw anchors or wedge anchors
• Anchorage to structural steel using #12 self-drilling screws
• Attachment to CMU using Titen HD or Titen Turbo concrete and masonry screws

What's Included

• 10 x Simpson Strong-Tie RCKW 5.5 in. Kneewall Connector Clips

Frequently Asked Questions

Can the RCKW5.5 be used with both concrete and structural steel?

Yes. The RCKW5.5 features a unique small and large anchor-hole pattern that permits anchorage to both concrete and structural steel. Large-diameter holes accommodate 1/2-in. concrete screw anchors and wedge anchors, while additional smaller-diameter holes enable attachment to structural steel through use of #12 self-drilling screws.

What options are available if a higher load capacity is needed?

If load requires more capacity, the optional stiffener model RCKW5.5S can be added. The RCKW5.5S is a heavy 171 mil (7 ga.) stiffener that nests onto the RCKW clip, with screw holes and anchor holes that line up with those in the RCKW clip for easy fastener and anchor installation. The RCKW clip and RCKWS stiffener are sold separately.

How many anchor solutions does the RCKW5.5 support?

The RCKW5.5 has three large holes for added versatility. The center hole provides a one-anchor solution at the edge or center of slab, while the outer holes support a two-anchor solution for applications requiring higher capacities at the center of slab.

Can the RCKW5.5 be attached to CMU (concrete masonry units)?

Yes. Attachment to CMU can be achieved using the Titen HD or Titen Turbo concrete and masonry screw anchors.

Related Products

• RCKW

Note: For greater load capacity, use with the optional stiffener model RCKW5.5S. Use all specified screws and anchors. The RCKW clip and RCKWS stiffener are sold separately.