The Simpson Strong-Tie RCKW3D rigid connector by Simpson Strong-Tie has been developed to resist overturning moment at the base of exterior kneewalls and parapets as well as interior partial-height walls or overhead ribbon window conditions. This connector has two large holes for anchorage. It provides an option for more capacity in 3-5/8" framed kneewalls. If the load requires more capacity, the RCKW3DS stiffener can be added. The stiffer nests onto the clip. The screw holes and anchor holes in the stiffener line up with those in the RCKW3D clip, making the fastener and anchor installation a snap. The clip and stiffener are sold separately.

• Use all specified screw fasteners. To achieve tabulated load values, use #12–14 screws according to the fastener patterns shown in the installation illustrations.
• When using the RCKWS, secure the stiffener to the clip with the specified screw fasteners. Screws must be at least 1" long and extend through the connection with a minimum of three exposed threads.
• Use all specified anchors. To achieve tabulated stiffness values, the installation torque for concrete anchors shall be at least 17 ft.-lb. or the torque requirements of the anchor, whichever is greater.
• When using the larger-diameter anchor holes, the bottom track must be predrilled or punched with a 3/4"- diameter hole.