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Strong-Drive® SDW EWP-PLY Screw 

Strong-Drive® SDW EWP-PLY Screw

The Strong-Drive SDW EWP-Ply screw is a high-strength structural wood screw specifically designed for fastening multi-ply wood members, such as engineered wood products and solid sawn lumber. 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 girders and simplifies the installation of finishes or structural connectors. It is code listed under IAPMO-UES ER-192 and meets 2012 and 2015 IRC® and IBC® code requirements for several common wood framing applications.

Key Features

  • Large washer head provides maximum bearing area; stamped with the Simpson Strong-Tie “≠” sign and fastener length for easy identification after installation (0.75" head dia.)
  • Deep 6-lobe T-40 recess reduces cam-out, making driving easier
  • 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
  • Higher shear values than competitive products enable wider spacing saving time and money
  • Bold thread design provides superior holding power and cinches fastened members together for consistent installation
  • Patented 4CUT™ point ensures fast starts, reduced installation torque and eliminates the need for predrilling in most applications
  • Retail and mini-bulk packs include one 6-lobe, T-40 driver bit; bulk packs include two driver bits

Applications

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

Codes

Related Links

Catalog Pages

Related Literature

Product Information Table

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

Load Tables

SDW EWP-PLY — 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.
Low-Profile Head

Loaded on Head Side
(3-ply assembly shown – other configurations similar)

SDW EWP-PLY — Allowable Shear Loads — Load 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
(3-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 2-Ply 4x2 Truss
(2-ply 3x2 similar)

Concentrated Load

Uniform Load

SDW EWP-PLY — 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 3-ply assembly with a head side load of 1,300 plf and point side load of 1,000 plf may be fastened together with 3 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

Drawings

Part Orthographic Perspective
SDWNone None
SDW22338None None
SDW22500None None
SDW22634None None