SDWC Truss Screw

Name: SDWC Truss Screw
Brand: Simpson Strong-Tie
SKU: sdwc

Select your Model:

SKU: SDWC15450-KT

AUD$270.00per Carton

Description:

The Strong‑Drive^® SDWC Truss Screw provides a truss and rafter-to-top plate connection as well as a method to fasten stud-to-top and bottom plate. The fully-threaded shank engages the entire length of the fastener providing a secure connection.

The SDWC uplift values listed were analysed and calculated based on the characteristic values determined following AS1649-2001 (Timber-Methods of Test for Mechanical Fasteners and Connectors-Basic Working Loads and Characteristic Strength). The SDWC has also been tested in accordance with ICC-ES AC233 (screw) and AC13 (wall assembly and roof-to-wall assembly) for uplift and lateral loads between wall plates and vertical wall framing and between the top plate and the roof rafters or trusses.

Model Variants:

Description	Unit	Carton QTY	Price AUD
SDWC 4-1/2IN T30 50CT W/GUIDE INCL	Carton	6	$270.00
SDWC 6IN T30 50CT W/GUIDE	Carton	6	$330.00
SDWC 6IN T30 500CT W/GUIDE INCL	Carton	0

Model No Table:

Model No.	Fastener Length (mm)	Thread Length (mm)	Diameter (mm)			Fastener Strength
			Head	Major	Minor	Bending Yield Strength (MPa)	Tension (kN)	Shear (kN)
SDWC15450-KT	114	108	8.31	5.97	3.86	1345	15.5	10.9
SDWC15600-KT / SDWC15600B-KT	152	146
For the purposes of measuring overall length, fasteners shall be measured from the top of the head to the end of the point. Length of thread includes the point. Bending yield strength is the 5%-offset value based on the minor diameter as determined following ASTM F1575. Tension and shear properties are average ultimate values. Shear strength is shear through the threads.

Characteristic Single-Shear Lateral Design Values for the Strong-Drive SDWC Truss Screws

Model No.	Fastener Length (mm)	Thread Length (mm)	Side Member		Main Member		Lateral Characteristic Design Value, QkL (N)
			Min. Thickness (mm)	Grain	Min. Thickness (mm)	Grain	Q_kL para		Q_kL perp
			Min. Thickness (mm)	Grain	Min. Thickness (mm)	Grain	JD4	JD5	JD4	JD5
SDWC15450	114	108	35	Face	35	End	—	—	2220	2220
SDWC15600	152	146	2/35	Face	35	Edge	4200	3500	5300	5100
			35	Face	35	End	—	—	2950	2650
			2/35	Face	35	End	—	—	4650	4150
The Main Member is the part where the fastener tip is embedded; the Side Member is part adjacent to the head. Minimum penetration into the main member shall be 25mm. The main and side members shall be sawn timber or structural composite timber with the design density or equivalent design density typical of JD4 and JD5 grades. Screws shall be installed into the side grain of the wood side member with the screw axis at a 90-degree angle to the surface of the member. Para: Parallel-to-grain loading in the side member and perpendicular-to-grain loading in the main member. Perp: Perpendicular-to-grain loading in the side member and perpendicular-to-grain loading in the main member, except where the main member is loaded parallel-to-grain.

Characteristic Withdrawal and Pull-Through for the Strong-Drive SDWC Truss Screws

Model No.	Thread Length (mm)	Thread Length (mm)	Main Member		Withdrawal Characteristic Design Value, Q_kw (N/mm)		Pull-Through Characteristic Design Value, Q_kp (N/mm)
Model No.	Thread Length (mm)	Thread Length (mm)	Min. Thickness (mm)	Grain	JD4	JD5	JD4	JD5
SDWC15450	114	108	35	Edge	133	84	—	—
SDWC15600	152	146	35	End	78	50	96	82
			35	Face	110	75	108	97
			2/35	Face	118	102	131	105
Withdrawal and pull-through characteristic values are in N/mm of thread penetration into the main member and side member, respectively. Face and edge installations are at 90 degrees to the grain and end installation is along the grain. Withdrawal and Pull-through loads shall be checked against tension strength in design.

Connection Geometry for Strong-Drive SDWC Truss Screws

Condition		Minimum Distance or Spacing (mm)
Condition		SDWC15450/SDWC15600
Edge Distance	Load in any direction	13
End Distance	Load along grain toward end	50
	Load along grain way from end	50
	Loading across grain (including withdrawal loads)	25
Spacing Between Fasteners in a Row	Loaded parallel grain	90
Spacing Between Fasteners in a Row	Loaded perpendicular to the grain	60
Edge distances, end distances, and spacing of screws shall be sufficient to prevent splitting of the timber or as required in this table, or when applicable, as recommended by the structural composite timber manufacturer, whichever is more restrictive. Edge and end distances based on Evaluation Report 262.