Kneewall Connector

The Simpson Strong-Tie® RCKW is a heavy duty rigid connector that has been developed to resist an overturning moment at the base of exterior kneewalls and parapets as well as interior partial height walls or overhead ribbon window conditions.

Technical Data Sheet

Product Details

Features

The RCKW is a 1 or 2 part connector designed to resist an over-turning moment at the base of exterior knee-walls and parapets as well as interior partial height walls.

These connectors offer a unique large and small anchorage hole pattern that permits anchorage into both hot rolled steel and concrete.

If more rigidity is required, a stiffener (the RCKWS) can be added to nest into the RCKW clip; the screw and anchor holes line up making installation simple, with no need for pre drilling. The RCKW and the RCKWS are sold separately.

Key Features include:

Anchorage legs incorporate stifened flanges, improving over-turning moment resistance
Large diameter anchor holes accommodate 12 mm diamter fixings (LMAS stud with AT-HP Resin)
Additional smaller diameter anchor holes allow for the attachment to hot rolled steel with X1224D540 self-drilling screws.

Material

Galvanised Mild Steel: 275 g/m²

Technical Data

Product Dimensions

Table "Product Dimensions" cannot be displayed : no references available.

Performance Values - 1.2mm LGS (Concrete)

Reference	Angle bracket capacity
	Performance Values - 1.2mm Member Thickness (Concrete)
	Minimum Framing Member Depth[mm]	Screw Installation Pattern	Assemby Rotational Stiffness β[Nm/Rad]	Connector Rotational Stiffness βc[Nm/Rad]	Safe Working Loads[kN]							Number of Fasteners			Characteristic loads[kN]
					Moment MR,SWL[Nm]	Tension R2,SWL	Shear R4,SWL	Anchor Tension at MR Capacity		Anchor Tension at R2 Capacity		Flange A Stud	Flange B Concrete	Flange B Structural Steel	Moment MR,K[Nm]	Tension R2,K	Shear R4,K	Anchor Tension at MR Capacity		Anchor Tension at R2 Capacity
					Moment MR,SWL[Nm]	Tension R2,SWL	Shear R4,SWL	Concrete C20/25	Concrete C30/35	Concrete C20/25	Concrete C30/35	Qty (X1214D325)	Qty (M12 Anchor)	Qty (X1224D540)	Moment MR,K[Nm]	Tension R2,K	Shear R4,K	Concrete C20/25	Concrete C30/35	Concrete C30/35	Concrete C20/25
RCKW3+RCKW3S	90	2	18530	19772	476	11.5	3.5	17.5	15.4	19.6	16.7	9.0	1.0	-	648	15.7	4.8	21.8	20	21.7	23.9
RCKW5.5+RCKW5.5S	150	4	50843	55363	954	11.4	4.6	15.9	15.2	15.3	14.6	10.0	1.0	-	1299	15.5	6.3	21	20.3	19.5	20.2
RCKW7.5+RCKW5.5S	200	6	66774	70390	1233	10	5.3	14.3	13.9	12.6	12.3	10.0	1.0	-	1678	14.8	7.3	19.1	18.7	18.1	18.5

Performance Values - 1.6mm LGS (Concrete)

Reference	Angle bracket capacity
	Performance Values - 1.6mm Member Thickness (Concrete)
	Minimum Framing Member Depth[mm]	Screw Installation Pattern	Assemby Rotational Stiffness β[Nm/Rad]	Connector Rotational Stiffness βc[Nm/Rad]	Number of Fasteners			Safe Working Loads[kN]							Characteristic loads[kN]
					Flange A Stud	Flange B Concrete	Flange B Structural Steel	Moment MR,SWL[Nm]	Tension R2,SWL	Shear R4,SWL	Anchor Tension at MR Capacity		Anchor Tension at R2 Capacity		Moment MR,K[Nm]	Tension R2,K	Shear R4,K	Anchor Tension at MR Capacity		Anchor Tension at R2 Capacity
					Qty (X1214D325)	Qty (M12 Anchor)	Qty (X1224D540)	Moment MR,SWL[Nm]	Tension R2,SWL	Shear R4,SWL	Concrete C20/25	Concrete C30/35	Concrete C20/25	Concrete C30/35	Moment MR,K[Nm]	Tension R2,K	Shear R4,K	Concrete C20/25	Concrete C30/35	Concrete C20/25	Concrete C30/35
RCKW3+RCKW3S	90	2	18530	19772	9.0	1.0	-	583	15.3	5	29.8	20.4	27.3	25.9	908	22.5	7.3	39.6	31.2	40.2	35.5
RCKW5.5+RCKW5.5S	150	4	52764	56718	10.0	1.0	-	1308	16.9	6.2	23.8	21.9	25.2	23.1	1917	24.9	9.1	33.7	31.5	35.8	33.4
RCKW7.5+RCKW5.5S	200	6	77847	81349	10.0	1.0	-	1587	11.7	7.5	19	18.3	14.9	14.5	2336	25.3	11.1	27.6	26.7	33.8	32.4

Performance Values - 1.2mm LGS (Structural Steel)

Table "Performance Values - 1.2mm LGS (Structural Steel)" cannot be displayed : no references available.

Performance Values - 1.6mm LGS (Structural Steel)

Table "Performance Values - 1.6mm LGS (Structural Steel)" cannot be displayed : no references available.

Installation

Use all specified fasteners (see performance tables for fastener quantities and types)
When using the RCKWS, secure the stiffener to the clip with the specified fasteners. Screws must extend through the connection with a minimum of three exposed threads.
When installing onto concrete, the installation torque must be as published for the relevant anchor type and size
When using the larger-diameter anchor holes, the bottom track must be predrilled or punched with a 20mm diameter hole.