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SDWF Floor-to-Floor Screw

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Product Details
TUW-Take-Up-Washers
TUW-Take-Up-Washers
SDWF_TUW_Assembly
SDWF_TUW_Assembly
SDWF-TUW_Installation
SDWF-TUW_Installation

The Simpson Strong-Tie® Strong-Drive® SDWF Floor-to-Floor screw is designed to simplify the floor-to-floor, wind-uplift restraint connection while providing superior performance over the life of the structure. The unique design of the SDWF enables it to attach upper and lower walls together from the top, spanning the floor system and providing an easy-to-install connection within the continuous uplift load path of the structure.

The innovative TUW take-up washer plays a key role in the long-term performance of the SDWF when installed between the screw head and the sole plate of the upper floor. As the structure settles because of shrinkage and construction loading, the threaded portion under the head of the screw ratchets up through the tabs of the TUW, which is fastened with Simpson Strong-Tie Strong-Drive SD Connector screws. The interlock between the tabs of the take-up washer and the threads under the head of the SDWF prevent the screw from sliding back under load, providing a simple yet reliable means of shrinkage compensation for up to 19mm per story.

Material
  • SDWF — Carbon steel
  • TUW — 3.5mm Carbon steel
Finish
  • SDWF — E-Coat™
  • TUW — Galvanised
Features & Benefits
  • Faster to install than other floor-to-floor connection methods —drive the screw, install the take-up washer and the connection is made from plate to plate
  • Shrinkage compensation ensures a tight connection — even after initial shrinkage and settlement occur
  • Installs from inside the structure, eliminating exterior work on the upper stories and enhancing job safety
  • Fastening can be done before or after exterior sheathing is applied for added flexibility
  • One screw length can be used for multiple floor depths (refer to chart to select appropriate screw size), reducing the need for many screw lengths
  • The SDWF kit includes all required installation hardware
Applications
  • The upper and lower wall connections
Model No. Table

Model No.

Size

(mm)

Thread Length (mm)

Head Dia. mm/Head Type

Joist Depth Below(mm)

Allowable Withdrawal per Thread

Penetration (N/mm)

Single 45mm Bottom Plate

Min.

Max.

JD4

JD5

JD6

SDWF2720-TUW

7mm x 508mm

127

18.5mm/ Hex

320mm

360mm

131

105

80
  1. Joist depth listed based on the 19mm flooring and 70mm of thread penetration into double top plates.
  2. For 300mm deep joists install a 35mm block on bottom plate.
 
Brochures & Catalogues

Brochures and Catalogues

PDF icon Flyer - SDWF Floor-to-Floor Screw
Technical Data & Docs

Technical Data Sheets

PDF icon Technical Data Sheet - SDWF

Report Links

ESR-3046

Warranty

Warranty

CAD Library

Download

jpg: 
Image icon SDWF_Detail_Typical Installation.jpg
dxf: 
Binary Data SDWF_Detail_Typical Installation.dxf
dwg: 
File SDWF_Detail_Typical Installation.dwg
PDF: 
PDF icon SDWF_Detail_Typical Installation.pdf

Download

jpg: 
Image icon SDWF_Detail_SDWF_with_TUW_Take-Up_Washer_Installation.jpg
dxf: 
Binary Data SDWF_Detail_SDWF_with_TUW_Take-Up_Washer_Installation.dxf
dwg: 
File SDWF_Detail_SDWF_with_TUW_Take-Up_Washer_Installation.dwg
PDF: 
PDF icon SDWF_Detail_SDWF_with_TUW_Take-Up_Washer_Installation.pdf

Download

jpg: 
Image icon SDWF_Detail_Corner_Conditions_with_Double_SDWF-TUW.jpg
dxf: 
Binary Data SDWF_Detail_Corner_Conditions_with_Double_SDWF-TUW.dxf
dwg: 
File SDWF_Detail_Corner_Conditions_with_Double_SDWF-TUW.dwg
PDF: 
PDF icon SDWF_Detail_Corner_Conditions_with_Double_SDWF-TUW.pdf
Package icon Download Full Set (3.86 MB)
Inspiration

Inspiration

SDWF_Application_01.jpg

SDWF_Application_02.jpg

SDWF_Application_03.jpg

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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*.

* Start typing address and select from the autocomplete.

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Structural Connections

 

Unmatched Quality from the Truss to the Foundation

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 testing to service to availability, everything we do is engineered to ensure your project's success. With every product, you know you are getting the quality, value, service and on-time delivery that we have built our reputation on for the past 60 years.

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. 

Steel Frame Connectors

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.

Find out how Simpson Strong-Tie timber connectors can help you build the right way every day. Download the Cold-Fromed Steel Construction Connectors Catalogue.