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SDWC Truss Screw

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Product Details
SDWC
SDWC
SDWC Illustration
SDWC Illustration
Installation Guide
Installation Guide
SDWC Orange & Black
SDWC Orange & Black
SDWC Pack
SDWC Pack
SDWC
SDWC

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.

Material

Carbon Steel

Finish

E‑Coat™ (SDWC15600 has an orange topcoat)

Features & Benefits
  • Cap Head countersinks fully into the double top plate to avoid interference with plasterboard or finish trades
  • Orange colour for easy inspection of 152 mm screws
  • Fully-threaded shank engages the entire length of the fastener, providing a secure connection between the roof and wall framing members
  • Type-17 Point for faster starts and easier driving
  • Wide tolerance on installation angle makes it easy to install the SDWC correctly — Installation guide included to help ensure proper installation angle
  • Can be installed from inside the structure, eliminating exterior work on the upper stories and enhancing job safety
  • Fastening can be performed before or after exterior sheathing is applied for added flexibility
  • Installation guide included in pack to help ensure proper installation angle
Applications
  • Truss/Rafter-to-Top Plate connection
  • Stud-to-Top and Bottom Plate connection
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

114

108

8.31

5.97

3.86

1345

15.5

10.9

SDWC15600

152

146
  1. 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.
  2. Bending yield strength is the 5%-offset value based on the minor diameter as determined following ASTM F1575.
  3. 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

QkL para

QkL perp

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
  1. The Main Member is the part where the fastener tip is embedded; the Side Member is part adjacent to the head.
  2. Minimum penetration into the main member shall be 25mm.
  3. 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.
  4. 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.
  5. Para: Parallel-to-grain loading in the side member and perpendicular-to-grain loading in the main member.
  6. 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, Qkw

(N/mm)

Pull-Through

Characteristic

Design Value, Qkp

(N/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
  1. Withdrawal and pull-through characteristic values are in N/mm of thread penetration into the main member and side member, respectively.
  2. Face and edge installations are at 90 degrees to the grain and end installation is along the grain.
  3. 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)

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

Loaded perpendicular to the grain

60
  1. 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.
  2. Edge and end distances based on Evaluation Report 262.
 
Brochures & Catalogues

Brochures and Catalogues

PDF icon Brochure - SDWC Truss ScrewPDF icon Structural Screw Overview 2024PDF icon Catalogue - Mass Timber Construction
Installation Guides

Installation Guides

PDF icon SDWC Installation Guides
Technical Data & Docs

Technical Data Sheets

PDF icon Technical Data Sheet - SDWC

Report Links

ER-262
FL13975

Warranty

Warranty

CAD Library

Download

jpg: 
Image icon SDWC_Detail_Beam-to-Truss.jpg
dxf: 
Binary Data SDWC_Detail_Beam-to-Truss.dxf
dwg: 
File SDWC_Detail_Beam-to-Truss.dwg
PDF: 
PDF icon SDWC_Detail_Beam-to-Truss.pdf

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jpg: 
Image icon SDWC_Detail_Stud-to-Bottom Plate_Cross Section.jpg
dxf: 
Binary Data SDWC_Detail_Stud-to-Bottom Plate_Cross Section.dxf
dwg: 
File SDWC_Detail_Stud-to-Bottom Plate_Cross Section.dwg
PDF: 
PDF icon SDWC_Detail_Stud-to-Bottom Plate_Cross Section.pdf

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jpg: 
Image icon SDWC_Detail_Stud-to-Bottom Plate_Mid Floor.jpg
dxf: 
Binary Data SDWC_Detail_Stud-to-Bottom Plate_Mid Floor.dxf
dwg: 
File SDWC_Detail_Stud-to-Bottom Plate_Mid Floor.dwg
PDF: 
PDF icon SDWC_Detail_Stud-to-Bottom Plate_Mid Floor.pdf

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jpg: 
Image icon SDWC_Detail_Stud-to-Top Plate.jpg
dxf: 
Binary Data SDWC_Detail_Stud-to-Top Plate.dxf
dwg: 
File SDWC_Detail_Stud-to-Top Plate.dwg
PDF: 
PDF icon SDWC_Detail_Stud-to-Top Plate.pdf

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jpg: 
Image icon SDWC_Detail_Truss-to-Top Plate (double)_Cross Section.jpg
dxf: 
Binary Data SDWC_Detail_Truss-to-Top Plate (double)_Cross Section.dxf
dwg: 
File SDWC_Detail_Truss-to-Top Plate (double)_Cross Section.dwg
PDF: 
PDF icon SDWC_Detail_Truss-to-Top Plate (double)_Cross Section.pdf

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jpg: 
Image icon SDWC_Detail_Truss-to-Top Plate(offset).jpg
dxf: 
Binary Data SDWC_Detail_Truss-to-Top Plate(offset).dxf
dwg: 
File SDWC_Detail_Truss-to-Top Plate(offset).dwg
PDF: 
PDF icon SDWC_Detail_Truss-to-Top Plate(offset).pdf

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jpg: 
Image icon SDWC_Detail_Truss-to-Top Plate.jpg
dxf: 
Binary Data SDWC_Detail_Truss-to-Top Plate.dxf
dwg: 
File SDWC_Detail_Truss-to-Top Plate.dwg
PDF: 
PDF icon SDWC_Detail_Truss-to-Top Plate.pdf

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jpg: 
Image icon SDWC_Detail_Truss-to-Top Plate_Cross Section.jpg
dxf: 
Binary Data SDWC_Detail_Truss-to-Top Plate_Cross Section.dxf
dwg: 
File SDWC_Detail_Truss-to-Top Plate_Cross Section.dwg
PDF: 
PDF icon SDWC_Detail_Truss-to-Top Plate_Cross Section.pdf

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jpg: 
Image icon SDWC_Detail_Truss-to-Top Plate_Cross Section2.jpg
dxf: 
Binary Data SDWC_Detail_Truss-to-Top Plate_Cross Section2.dxf
dwg: 
File SDWC_Detail_Truss-to-Top Plate_Cross Section2.dwg
PDF: 
PDF icon SDWC_Detail_Truss-to-Top Plate_Cross Section2.pdf
Package icon Download Full Set (6.87 MB)
Alternative Products

Alternative Products

E5_Reinforced Angle Bracket

E5 Reinforced Angle Bracket

E5 Reinforced Angle Bracket is suitable for structural applications in framing and timber-frame houses for general connecting of timber at 90° angles. Typical applications include fixing trusses, studs, purlins, beams and posts.

A35

A35 Reinforced Angle Bracket

The versatile A35 Reinforced Angle Brackets provide a way to make a straight angle of 90° connection. The A35 Angle Bracket’s exclusive bending slot allows instant, accurate field bends for two and three-way ties.

Inspiration

Inspiration

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SDWC_Application_02.jpg

SDWC_Application_03.jpg

SDWC_Application_04.jpg

SDWC_Application_05.jpg

SDWC_Application_06.jpg

SDWC_Application_07.jpg

SDWC_Application_08.jpg

SDWC_Application_09.jpg

SDWC_Application_10.jpg

SDWC Truss Screw — The Simple New Way for Truss, Stud and Top Plate Connections

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Request a Demo/Sample*

Experience the innovation of Simpson Strong-Tie products and how we can help you build safer, stronger structures. Please fill out your details and submit the form below. We’ll be in touch to provide you a demo and/or send you samples*.

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With nearly 60 years of field and R&D experience, Simpson Strong-Tie® timber connectors are manufactured to the industry's highest standards. From framing angles to straps to heavy-duty joist hangers, we offer the most diverse product line so that you have the right product for the job.

Simpson Strong-Tie® connectors offer unmatched quality with laboratory and field testing, and are backed by our uncompromising commitment to customer service. As the company that built the connector industry, you can count on Simpson Strong-Tie® to work closely with builders, engineers and building officials to deliver innovative, building code-compliant solutions to help build safer, stronger structures economically. Download the Structural Connectors Overview Flyer.

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From straps and ties to joist hangers and much more, Simpson Strong-Tie® structural connectors increase the strength and safety of timber-frame structures. Each connector is unique to Simpson Strong-Tie and is designed for specific applications without the need to adapt metal plating to suit a connection. 

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From fully tested and engineered connectors and clips Simpson Strong-Tie® provides comprehensive structural solutions for cold-formed steel construction. From steel-to-steel connections to full-scale lateral solutions and curtain wall connectors, we remain committed to developing new technology that helps to advance the cold-formed steel industry.

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