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Strong-Drive® SDS Structural Wood Screw


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Identification on all
SDS screw heads

Lengths
1 1/2"
2"
2 1/2"
3"
3 1/2"
4 1/2"
5"
6"
8"
Stamp
SDS Head Stamps

The Simpson Strong-Tie® Strong-Drive® screw (SDS) is a 1/4" diameter structural wood screw ideal for various connector installations as well as wood-to-wood applications. It installs with no predrilling and has been extensively tested in various applications. The new SDS is improved with a patented easy driving 4CUT™ tip and a corrosion resistant double-barrier coating

Find this fastener in the Fastener Finder

Also see other Strong-Drive® screws:

For attaching various components to concrete and masonry, see:

Features:

Material: Heat-treated carbon steel; Type-316 stainless steel

STAINLESS STEEL: The SDS Strong-Drive 1/4" wood screw line has expanded to include stainless-steel SDS screws in 1 1/2" to 3 1/2" lengths, suitable for fastening Simpson Strong-Tie stainless-steel products. Offering the same easy-driving, split-reducing installation of the standard SDS screw, these screws are made from type 316 stainless steel. The new stainless-steel SDS screws are appropriate for higher-exposure environments where maximum corrosion-resistance is required.

Finish: Double-barrier coating provides corrosion resistance equivalent to hot-dip galvanization.
Contact Simpson Strong-Tie for product availability and ordering information.

Installation:

Also see Simpson Strong-Tie Connector Selector® software.

top Gallery:
  roll over images below to see larger image
 
 
SDS1/4"x3"
US Patents 6,109,850;
5,897,280; 7,101,133; 7,832,173
 Identification on all SDS screw heads (SDS1/4"x3" shown) The 4CUT tip reduces installation torque and makes driving easier.  
SDS 1/4"x8" Screw   The SDS is suitable for installing ledgers and meets the requirements of the building codes. See flier Strong-Drive® SDS Screw For Deck Ledgers for spacing and other information.

top Load Tables: See code report listings below

Allowable Shear Loads for Steel Side-Plate Applications
SDS and SD Wood Screws
  1. Allowable loads for SDS screws are based on ICC-ES Code Report ESR-2236. Screws may be provided with the 4CUT™ or Type-17 point.
  2. SDS screws install best with a low speed 1/2" drill with a 3/8" hex head driver.
  3. Allowable loads are shown at the wood load duration factor of CD = 1.00. to interior-dry use only. Loads may be increased for load duration up to a CD = 1.60.
  4. Allowable withdrawal load for DF/SP/SCL is 172 lbs./in. and for SPF/HF withdrawal is 150 lbs./in.. Total withdrawal load is based on actual thread penetration into the main member
  5. LSL wood-to-wood applications that require 4 1/2", 5", 6" and 8" SDS screws are limited
  6. Minimum spacing requirements are listed in ICC-ES ESR-2236.


Allowable Shear Loads for Wood Side-Plate Applicationss
SDS and SD Wood Screws
SDS Spacing Details
SDS Spacing Details
  1. Noted loads are based on ICC-ES Code Report ESR-2236 and/or testing per ICC AC233 and assume a minimum main member thickness of the screw length minus the side member thickness. All other allowable loads are based on the 2005 National Design Specification (NDS) and a minimum penetration of 6D = 1.45" into the main member.
  2. Values are valid for a connection involving only two members. Where the side and main members have different specific gravities, the lower values shall be used.
  3. Allowable loads are also applicable to structural composite lumber (e.g., LVL, PSL, and LSL) having an equivalent specific gravity of 0.50 or greater.
  4. Allowable loads are shown at the wood load duration factor of CD = 1.00. Loads may be increased for load duration by the building code up to a CD = 1.60. The Designer shall apply all adjustment factors required per NDS.
  5. Loads are based on installation into the side grain of the wood members with the screw axis perpendicular to the wood fibers.
  6. Loads apply to appropriate stainless-steel models.






Allowable Double-Shear Loads
SDS and SD Wood Screws
  1. Allowable loads are based on Simpson Strong-Tie® laboratory testing with a safety factor of 5 applied to the average ultimate test load.
  2. Allowable loads are based on 1 1/2" thick main members and assume no gap between side and main members.
  3. Allowable loads are shown at the wood load duration factor of CD = 1.00. Loads may be increased for load duration by the building code up to a CD = 1.60. The designer shall apply all adjustment factors required per NDS.
  4. For applications with 2x side members, use allowable loads based on the lower of side member or main member species.
  5. The Designer is responsible for the design of wood members.
Typical SDS Double Shear Installation
Typical SDS Double Shear Installation





Allowable Shear loads for Installations into the Narrow Face of 2x Main Members
SDS and SD Wood Screws
  1. Allowable loads are based on testing per ICC AC233 and are limited to parallel-to-grain loaded solid sawn main members (2" nominal). Wood side members may be loaded parallel or perpendicular to grain (see footnote 4).
  2. DF/SP allowable loads are based on wood members having a minimum specific gravity of 0.50, and SPF/HF allowable loads are based on wood members having a minimum specific gravity of 0.42. Where the side and main members have different specific gravities, the lower values shall be used.
  3. Allowable loads are shown at the wood load duration factor of CD = 1.00. Loads may be increased for load duration by the building code up to a CD = 1.60.
  4. Minimum spacing of fasteners is 3" o.c., minimum end distance is 3" for all parallel-to-grain loaded members, or 4" for all perpendicular-to-grain loaded members, and minimum edge distance is 3/4" for all parallel-to-grain loaded members, or 1 1/2" for perpendicular-to-grain loaded side members.
  5. Screws may be installed with an intermediate layer of wood structural panel between the side and main member provided the wood structural panel is fastened to the main member per code and the minimum penetration of the screw into the main member (excluding the wood structural panel) is met.
Sole-Plate-to-Rim Board Assembly
Sole-Plate-to-Rim Board Assembly
Typical SDS Double Shear Installation
Ledger-to-Stud Assembly




Allowable Shear loads for Attachment of Sole Plate to LVL or LSL Rim Board
Allowable Shear loads for Attachment of Sole Plate to LVL or LSL Rim Board
  1. Allowable loads are based on testing per ICC AC233 and are limited to parallel-to-grain loading.
  2. Allowable loads are shown at the wood load duration factor of CD = 1.00. Loads may be increased for load duration by the building code up to a CD = 1.60.
  3. Minimum spacing of fasteners is 6" o.c., minimum end distance is 6", and minimum edge distance is 5/8".
  4. Wood structural panel up to 1 1/8" thick is permitted between the sole plate and rim board provided it is fastened to the rim board per code and the minimum penetration of the screw into the rim board is met.
Sole-Plate-to-Rim Board Assembly
Sole-Plate-to-Rim Board Assembly




Code-Compliant Spacing for a Sawn Lumber Deck Ledger to Band Joist
SDS and SD Wood Screws
  1. Solid-sawn band joists shall be Spruce-Pine-Fir, Hem-Fir, Douglas Fir-Larch, or Southern Pine species. Ledger shall be Hem-Fir, Douglas Fir-Larch, or Southern Pine species.
  2. Fastener spacings are based on single fastener testing of the Strong-Drive® SDS screw with a safety factor of 5.0 and include NDS wet service adjustment factor.
  3. Multiple ledger plies shall be fastened together per code independent of the SDS screws.
  4. SDS screw spacing values (above) are equivalent to 2009 IRC Table R502.2.2.1, based on testing of the Strong-Drive® SDS screw with a factor of safety of 5.0. The table above also provides SDS screw spacing for a wider range of materials commonly used for band joists, and an alternate loading condition as required by some jurisdictions.
  5. Screw models SDS25312, SDS312SS and SDS25500.
Sole-Plate-to-Rim Board Assembly
Ledger-to-Band Joist Assembly
(Wood-framed lower floor acceptable,
concrete wall shown for illustration purposes)
SDS Screw Spacing Detail
SDS Screw Spacing Detail



next  top Code Reports (PDFs):
Legacy Reports
  IAPMO UES ER ICC-ES ESR CITY OF LOS ANGELES STATE OF FLORIDA ICC-ES NER ICC-ES ER ICC-ES ES
SD8x1.25No code listing: Please contact us for test data.
SDSSee specific model numbers for code listings.
SDS25112  ESR-2236 RR25711 FL9589      
SDS25134  ESR-2236 RR25711 FL9589      
SDS25200  ESR-2236 RR25711 FL9589      
SDS25212  ESR-2236 RR25711 FL9589      
SDS25300  ESR-2236 RR25711 FL9589      
SDS25312  ESR-2236 RR25711 FL9589      
SDS25412  ESR-2236 RR25711 FL9589      
SDS25600  ESR-2236 RR25711 FL9589      
SDS25800  ESR-2236 RR25711 FL9589      



next  topDrawings: To download drawings, right-click or Ctrl-click on the link, then choose "Save Target As..."
Download the Simpson Strong-Tie® AutoCAD® Menu, which allows you to insert Ortho views directly into your AutoCAD drawing.

 ORTHOGRAPHIC
PERSPECTIVE
SD8x1.25 SD8X1/4: DWG | DXF
SD8X1/4 front view: DWG | DXF
SD8X1/4 top view: DWG | DXF
None for this model
SDSNone for this model SDS Screw View 1: DWG | DXF
SDS Screw View 2: DWG | DXF
SDS Screw View 3: DWG | DXF
SDS Screw View 4: DWG | DXF
SDS Screw View 5: DWG | DXF
SDS25112 SDS25112 front view: DWG | DXF
None for this model
SDS25134 SDS25134 front view: DWG | DXF
None for this model
SDS25200 SDS25200 front view: DWG | DXF
None for this model
SDS25212 SDS25212 front view: DWG | DXF
None for this model
SDS25300 SDS25300 front view: DWG | DXF
None for this model
SDS25312 SDS25312 front view: DWG | DXF
None for this model
SDS25412 SDS25412 front view: DWG | DXF
None for this model
SDS25600 SDS25600 front view: DWG | DXF
None for this model
SDS25800 SDS25800 front view: DWG | DXF
None for this model

C-FS11 (Fastening Systems), page 76-79
   
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