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Strong-Drive® SDW™ EWP-PLY Screw 

Strong-Drive® Interior Wood Screws

This product's information may differ depending on the category of use. You are currently viewing details related to Strong-Drive® Interior Wood Screws. You can also view product information related to the category: Fasteners for the Timber Drive™ System

The Strong-Drive SDW EWP-Ply screw is a high-strength structural wood screw specifically designed for fastening multi-ply members made up of engineered wood products. The SDW EWP-Ply installs easily with no predrilling and is available in optimized lengths for fastening 1 3/4" engineered lumber, such as structural composite lumber (SCL). The large, flush head eases the handling of assembled components and simplifies the installation of finishes or structural connectors. It is code listed in IAPMO UES ER-192 and meets 2018 and 2021 IRC® and IBC® code requirements for most common wood framing applications.

Key Features

  • Large washer head with nibs provides maximum bearing area; stamped with the Simpson Strong-Tie “≠” sign and fastener length for easy identification after installation
  • 6-lobe, T40 drive provides positive engagement that makes the screw easy to drive and improves bit life (replacement driver bit — BIT40T-134-R2)
  • Low-profile head results in less interference after installation; makes stacking and sliding members easier and allows installation of hardware and finishes to be virtually flush
  • Optimal screw lengths provide maximum penetration while preventing the point from protruding out the back of the member
  • Specific thread lengths avoids jacking
  • High shear values enable wide spacing, saving time and money
  • Bold thread design provides superior holding power and cinches fastened members together for consistent installation
  • SawTooth® point ensures fast starts, reduces installation torque and eliminates the need for predrilling in most applications
  • Retail and mini-bulk packs include one 6-lobe, T40 driver bit; bulk packs include two driver bits

Applications

  • Multi-ply wood members, engineered lumber products and solid sawn lumber

Patent Information

  • US Patents 9,523,383; 11,181,138

Related Links

Catalog Pages

Related Literature

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Fastening Systems Technical Guide
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A technical document featuring engineering information for structural fasteners featured in the C-F-2023 Fastening Systems Catalog.
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Guía técnica de los sistemas de sujeción
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Flier

Product Information Table

Fastener Production Information and Stuff & Things
Model No. Coating/Material Length (in.) Head Diameter (in.) Shank Diameter (in.) Drive Type Head Type Thread Length (in.) Point Type Packaging Qty.
Footnotes
  1. Typical screw application key: SCL = 1 3/4 " plies of structural-composite lumber. SCL/3x2PCT = 1 3/4 " plies of structural-composite lumber or double 3x2 parallel-chord trusses. SCL/4x2PCT = 1 3/4 " or 3 1⁄2 " plies of structural-composite lumber or double 4x2 parallel-chord trusses.
SDW22338 E-coat® Electrocoating 3 3/8 0.760 0.220 T40 6-Lobe Low Profile Head 1 1/2 SawTooth® Point 900
SDW22338MB E-coat® Electrocoating 3 3/8 0.760 0.220 T40 6-Lobe Low Profile Head 1 1/2 SawTooth® Point 250
SDW22338-R50 E-coat® Electrocoating 3 3/8 0.760 0.220 T40 6-Lobe Low Profile Head 1 1/2 SawTooth® Point 50
SDW22500 E-coat® Electrocoating 5 0.760 0.220 T40 6-Lobe Low Profile Head 1 1/2 SawTooth® Point 600
SDW22500MB E-coat® Electrocoating 5 0.760 0.220 T40 6-Lobe Low Profile Head 1 1/2 SawTooth® Point 200
SDW22500-R50 E-coat® Electrocoating 5 0.760 0.220 T40 6-Lobe Low Profile Head 1 1/2 SawTooth® Point 50
SDW22634 E-coat® Electrocoating 6 3/4 0.760 0.220 T40 6-Lobe Low Profile Head 1 1/2 SawTooth® Point 500
SDW22634MB E-coat® Electrocoating 6 3/4 0.760 0.220 T40 6-Lobe Low Profile Head 1 1/2 SawTooth® Point 200
SDW22634-R50 E-coat® Electrocoating 6 3/4 0.760 0.220 T40 6-Lobe Low Profile Head 1 1/2 SawTooth® Point 50

Product Information Table

Model No. Length (in.) Drive Type Head Type Thread Length Shank Diameter (in.) Coating/Material Packaging Quantity UPC
SDW22338 3 3/8 T-40 6-Lobe Low Profile Head 1 9/16 0.220 E-Coat™ Electrocoating 900 707392147602
SDW22338MB 3 3/8 T-40 6-Lobe Low Profile Head 1 9/16 0.220 E-Coat™ Electrocoating 250 707392700708
SDW22338-R50 3 3/8 T-40 6-Lobe Low Profile Head 1 9/16 0.220 E-Coat™ Electrocoating 50 707392769408
SDW22500 5 T-40 6-Lobe Low Profile Head 1 9/16 0.220 E-Coat™ Electrocoating 600 707392268802
SDW22500MB 5 T-40 6-Lobe Low Profile Head 1 9/16 0.220 E-Coat™ Electrocoating 200 707392677109
SDW22500-R50 5 T-40 6-Lobe Low Profile Head 1 9/16 0.220 E-Coat™ Electrocoating 50 707392367505
SDW22634 6 3/4 T-40 6-Lobe Low Profile Head 1 9/16 0.220 E-Coat™ Electrocoating 500 707392855804
SDW22634MB 6 3/4 T-40 6-Lobe Low Profile Head 1 9/16 0.220 E-Coat™ Electrocoating 200 707392430209
SDW22634-R50 6 3/4 T-40 6-Lobe Low Profile Head 1 9/16 0.220 E-Coat™ Electrocoating 50 707392225300

Load Tables

SDW EWP-PLY — Reference Allowable Shear Loads — LVL, PSL and LSL Loaded on Head Side

  1. For minimum penetration into main (outermost) member of 1 1/2", use 300 lb.
Loaded on Head Side
Loaded on Head Side
(Three-ply assembly shown — other configurations similar)

SDW EWP-PLY — Reference Allowable Shear Loads — LVL, PSL and LSL Loaded on Point Side

  1. For minimum penetration into main member of 1 1/2", use 300 lb.
Loaded on Point Side
(Three-ply assembly shown — other configurations similar)

SDW EWP-PLY — Allowable Shear Loads — Two-Ply 3x2 / 4x2 Parallel-Chord Trusses Loaded on Either Side

  1. To transfer uniform or concentrated loads applied to simply supported spans on assembly top chord:
    1. Space screws as required to transfer half the load into the supporting truss.
    2. Minimum screw spacing shall be 4" o.c.
  2. To transfer concentrated loads applied to simply supported spans on an assembly top chord or vertical web:
    1. Concentrated loads must be applied at a panel point.
    2. Screws to be installed within 12" of the concentrated load on top-chord assembly.
  3. Gap between the trusses shall not exceed 1/8".
  4. Floor sheathing shall be screwed or nailed to each top-chord ply. (Fastener spacing per the applicable Code requirements, or 12" o.c.)
  5. SDW screws shall not be installed in areas where lumber wane exceeds 1/4".
  6. Hangers on skewed girders:
    1. Hanger loads not exceeding 34" o.c. on a skewed girder (resulting from uniformly spaced joists up to 24" o.c.) may be converted to a uniform load.
    2. For girders with hanger load spacing in excess of 34" o.c. the loads shall be considered as concentrated loads at the applicable locations.
  7. Other configurations acceptable when approved by Truss Designer.
SDW Screw Position in Two-Ply 4x2 Truss
(Two-ply 3x2 similar)
Concentrated Load
Uniform Load

SDW EWP-PLY — Reference Allowable Uniform Load (plf) Applied to Either Outside Member — Side-Loaded Multi-Ply LVL, PSL, and LSL Assemblies

  1. Each ply is assumed to carry same proportion of load. Loads may be applied to the head side and point side concurrently provided neither published allowable load is exceeded. (Example: a three-ply assembly with a head side load of 1,300 plf and point side load of 1,000 plf may be fastened together with three rows of SDW at 16" o.c. between fasteners in a row.)
  2. When hangers are installed on point side, hanger face fasteners shall be a minimum of 3" long.
  3. Tables are based on main member penetration as noted in single-fastener load tables.

See additional Load Tables, Technical Data and Installation Instructions for the Strong-Drive® SDW EWP-Ply screw.

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT

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