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Strong-Drive® SDWS TIMBER
and SDWH TIMBER-HEX Screws
Structural Wood-to-Wood Connections Including Ledgers


The Strong-Drive® SDWS Timber screw is designed to provide an easy-to-install, high-strength alternative to through-bolting and traditional lag screws. The Strong-Drive SDWH Timber-Hex SS screw provides a structural wood-to-wood connection, including for ledgers. As a Type 316 stainless steel fasteners, the Strong-Drive SDWH Timber-Hex SS screw offers maximum corrosion protection.

VIDEO: Watch how quickly SDWS/SDWH can be installed.

Find these fasteners in the Fastener Finder: SDWS | SDWH


Features:

  • Bold thread design provides superior holding power
  • Patented 4CUT™ tip ensures fast starts, reduces installation torque and eliminates the need for pre-drilling in most applications
  • Knurled shank section above the threads makes driving easier
  • Under-head nibs offer greater installer control when seating the head
  • Large head provides maximum bearing area
  • Double-barrier coating provides corrosion resistance equivalent to hot-dip galvanization, making it suitable for many exterior and preservative-treated wood applications
  • Available in lengths up to 10" for maximum versatility
  • Bit included in package


    Additional Strong-Drive SDWS Timber screw features:
  • Deep, 6-lobe drive reduces cam-out, making driving easier
  • Low-profile head design provides a clean look and less interference after installation


    Additional Strong-Drive SDWH Timber-Hex screw features:
  • Large hex-washer head provides excellent bearing area for a secure connection
  • Hex drive reduces cam-outs for easier driving

Material: Strong-Drive SDWS Timber screw—heat-treated carbon steel, Strong-Drive SDWH Timber-Hex SS screw—Type 316 stainless steel

Finish: Double-barrier coating

Installation:

  • See General Notes.
  • Strong-Drive SDWS Timber screws install best with a lowspeed 1/2" drill and a T-40 6-lobe bit. The matched bit included with the screws is recommended for best results.
  • Strong-Drive SDWH Timber-Hex SS screws install best with a low-speed 1/2" drill and a 5/16" hex driver bit. The matched bit included with the screws is recommended for best results.
  • Pre-drilling is typically not required. Where pre-drilling is necessary, use a 5/32" drill bit for Strong-Drive SDWS Timber screws and 0.188" Strong-Drive SDWH Timber-Hex SS screws. Use a 7/32" drill bit for 0.276" Strong-Drive SDWH Timber-Hex SS screws.
  • Screw heads that are countersunk flush to the wood surface are acceptable if the screw has not spun out.
Identification on all
Strong-Drive® SDWS TIMBER screw heads


Lengths     Stamp
SDS Head Stamps
3"
4"
5"
6"
8"
10"

top Gallery:
  roll over images below to see larger image
 
 
SDWS and SDWH
Strong-Drive® SDWS TIMBER
U.S. Patents 5,897,280; 7,101,133
Strong-Drive® SDWH TIMBER-HEX SS
U.S. Patents 5,897,280; 7,101,133
 
Ledger-to-Band Joist Assembly using SDWS
(Wood-framed lower floor acceptable, concrete wall shown for illustration purposes)

Exterior cladding and flashing not shown for clarity
Strong-Drive® SDWS TIMBER Screw Spacing Detail

Ledger fastener spacing may be offset up to 3" to avoid interference with joist attachment
Ledger-to-Band Joist Assembly using SDWH
(Wood-framed lower floor acceptable, concrete wall shown for illustration purposes)

Exterior cladding and flashing not shown for clarity
Strong-Drive® SDWH TIMBER-HEX SS Screw Spacing Requirements


top Product Information:

NEW All lengths of SDWS and SDWH screws now available in 250ct. package sizes.
See model numbers in the Fastener Finder: SDWS | SDWH

Strong-Drive® SDWS TIMBER Screw Product Information Table
  1. Retail and mini-bulk packs include one deep, 6-lobe, T-40 driver bit; bulk packs include two driver bits.

Strong-Drive® SDWH TIMBER-HEX SS Screw Product Information Table

top Strong-Drive® SDWS TIMBER Screw Load Tables:See code report listings below
Strong-Drive® SDWS TIMBER Spacing Requirements


Strong-Drive® SDWS TIMBER Screw Allowable Shear Loads – Douglas Fir-Larch and Southern Pine Table
  1. All applications are based on full penetration into the main member. Full penetration is the screw length minus the side member thickness.
  2. Allowable loads are shown at the wood load duration factor of CD = 1.0. Loads may be increase for load duration per the building code up to a CD = 1.6. Tabulated values must be multiplied by all applicable adjustment factors per the NDS.
  3. Minimum fastener spacing requirements: 6" end distance, 1 7/16" edge distance, 5/8" between staggered rows of fasteners, 4" between non-staggered rows of fasteners and 8" between fasteners in a row.
  4. For in-service moisture content greater than 19%, use CM = 0.7.

Strong-Drive® SDWS TIMBER Screw Allowable Shear Loads – Spruce-Pine-Fir and Hem-Fir Table
  1. All applications are based on full penetration into the main member. Full penetration is the screw length minus the side member thickness.
  2. Allowable loads are shown at the wood load duration factor of CD = 1.0. Loads may be increase for load duration per the building code up to a CD = 1.6. Tabulated values must be multiplied by all applicable adjustment factors per the NDS.
  3. Minimum fastener spacing requirements: 6" end distance, 1 7/16" edge distance, 5/8" between staggered rows of fasteners, 4" between non-staggered rows of fasteners and 8" between fasteners in a row.
  4. For in-service moisture content greater than 19%, use CM = 0.7.

Strong-Drive® SDWS TIMBER Screw – Douglas Fir-Larch, Southern Pine, Spruce Pine Fir and Hem Fir Lumber Allowable Withdrawal Loads Table
  1. The tabulated reference withdrawal design value, W, is in pounds per inch of the thread penetration into the side grain of the main member.
  2. The tabulated reference withdrawal design value, WMax, is in pounds where the entire thread length must penetrate into the side grain of the main member.
  3. Tabulated reference withdrawal design values, W and WMax, are shown at a CD = 1.0. Loads may be increased for load duration per the building code up to a CD = 1.6. Tabulated values must be multiplied by all applicable adjustment factors from the NDS as referenced in the IBC or IRC.
  4. Embedded thread length is that portion held in the main member including the screw tip.
  5. Values are based on the lesser of withdrawal from the main member or pull-through of a 1 1/2" side member.
  6. For in-service moisture content greater than 19%, use CM = 0.7.

Strong-Drive® SDWS TIMBER Screw – 2009 and 2012 IRC Compliant Spacing for a Sawn Lumber Deck Ledger to Band Joist
Table
  1. Strong-Drive® SDWS Timber screw spacing values are equivalent to 2009 IRC Table R502.2.2.1. The table above also provides Strong-Drive® SDWS Timber screw spacing for a wider range of materials commonly used for band joists, and an alternate loading condition as required by some jurisdictions.
  2. 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.
  3. Fastener spacings are based on the lesser of single fastener ICC-ES AC233 testing of the Strong-Drive® SDWS screw with a safety factor of 5.0 or ICC-ES AC13 ledger assembly testing with a factor of safety of 3.0. Spacing includes NDS wet service factor adjustment.
  4. Multiple ledger plies shall be fastened together per code independent of the Strong-Drive® SDWS Timber screws.
  5. Screws shall be placed at least 1 1/2" from the top or bottom of the ledger or band joist, 6" from the end of the ledger with 3" between rows and spaced per the table. See Strong-Drive® SDWS TIMBER Spacing Detail
  6. Structural sheathing between the ledger and band shall be a maximum of 1/2" thick and fastened per code.



top Strong-Drive® SDWH TIMBER-HEX SS Screw Load Tables:See code report listings below
Strong-Drive® SDWH TIMBER-HEX SS Screw Requirements


Strong-Drive® SDWH TIMBER-HEX SS Screw Allowable Shear Loads – Douglas Fir-Larch, Southern Pine, Spruce-Pine-Fir and Hem-Fir Table
  1. All applications are based on full penetration into the main member. Full penetration is the screw length minus the side member thickness
  2. Allowable loads are shown at the wood load duration factor of CD = 1.0. Loads may be increase for load duration per the building code up to a CD = 1.6. Tabulated values must be multiplied by all applicable adjustment factors per the NDS.
  3. Table values based on testing in SPF lumber.
  4. Minimum fastener spacing requirements: 3" end distance, 1 7/16" edge distance, 1 1/2" between staggered rows of fasteners, 3" between non-staggered rows of fasteners and 3" between fasteners in a row.
  5. Design values include NDS wet service factor; no adjustment required for in-service moisture content greater than 19%.
  6. Allowable loads are perpendicular or parallel to grain.
  7. Installs best with 18v high-torque cordless or 1/2" low speed drill. If splitting occurs predrill with 5/32" drill bit for 0.188"screws and 7/32" drill bit for 0.276" screws.
  8. Allowable withdrawal load for the 0.188" screw for DF/SP is 155 lbs./in. and for SPF/HF is 108 lbs./in. Allowable load is based on inches of thread penetration into the main member.
  9. Allowable withdrawal load for the 0.276" screw for DF/SP is 260 lbs./in. and for SPF/HF is 160 lbs./in. Allowable load is based on inches of thread penetration into the main member.
  10. For LRFD values, the reference connection design values shall be adjusted in accordance with NDS-12, section 10.3.


Strong-Drive® SDWH TIMBER-HEX SS Screw – 2009 and 2012 IRC Compliant Spacing for a Sawn Lumber Deck Ledger to Band Joist
0.276" Screws
Table
  1. Screw spacing values are equivalent to 2009 IRC Table R502.2.2.1 and 2012 IRC Table R507.2. The table on the left also provides screw spacing for a wider range of materials commonly used for band joists, and an alternate loading condition as required by some jurisdictions
  2. 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.
  3. Fastener spacings are based on the lesser of single fastener ICC-ES AC233 testing with a safety factor of 5.0 or ledger assembly testing with a factor of safety of 5.0. Spacing includes NDS wet service factor adjustment.
  4. Multiple ledger plies shall be fastened together per code independent of the screws.
  5. Screws shall be placed at least 1 7/16" from the top or bottom of the ledger or band joist, 1 1/2" between staggered rows of fasteners, 3" from the end of the ledger with 3" between rows and spaced per the table.
  6. Structural sheathing between the ledger and band shall be a maximum of 1/2" thick and fastened per code.

Strong-Drive® SDWH TIMBER-HEX SS Screw – 2009 and 2012 IRC Compliant Spacing for a Sawn Lumber Deck Ledger to Band Joist
0.188" Screws
Table
  1. Screw spacing values are equivalent to 2009 IRC Table R502.2.2.1 and 2012 IRC Table R507.2. The table on the left also provides screw spacing for a wider range of materials commonly used for band joists, and an alternate loading condition as required by some jurisdictions
  2. 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.
  3. Fastener spacings are based on the lesser of single fastener ICC-ES AC233 testing with a safety factor of 5.0 or ledger assembly testing with a factor of safety of 5.0. Spacing includes NDS wet service factor adjustment.
  4. Multiple ledger plies shall be fastened together per code independent of the screws.
  5. Screws shall be placed at least 1 7/16" from the top or bottom of the ledger or band joist, 1 1/2" between staggered rows of fasteners, 3" from the end of the ledger with 3" between rows and spaced per the table.
  6. Structural sheathing between the ledger and band shall be a maximum of 1/2" thick and fastened per code.



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
SDWHSee specific model numbers for code listings.
SDWH191000DB ER-192   RR25906        
SDWH19300DB ER-192   RR25906        
SDWH19400DB ER-192   RR25906        
SDWH19600DB ER-192   RR25906        
SDWH19800DB ER-192   RR25906        
SDWSSee specific model numbers for code listings.
SDWS19600 ER-192            
SDWS19712 ER-192            
SDWS221000 ER-192            
SDWS221000DB ER-192   RR25906        
SDWS221100 ER-192            
SDWS221200 ER-192            
SDWS221500 ER-192            
SDWS22300DB ER-192   RR25906        
SDWS22400DB ER-192   RR25906        
SDWS22500DB ER-192   RR25906        
SDWS22600DB ER-192   RR25906        
SDWS22800 ER-192            
SDWS22800DB ER-192   RR25906        
SDWS22900 ER-192            



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 ORTHOGRAPHIC
PERSPECTIVE
SDWHNone for this model None for this model
SDWH191000None for this model None for this model
SDWH19300 SDWH19300 top view: DWG | DXF
SDWH19300 left view: DWG | DXF
None for this model
SDWH19400None for this model None for this model
SDWH19600None for this model None for this model
SDWH19800None for this model None for this model
SDWSNone for this model None for this model
SDWS221000None for this model None for this model
SDWS22300 SDWS22300 top view: DWG | DXF
SDWS22300 left view: DWG | DXF
None for this model
SDWS22400None for this model None for this model
SDWS22500None for this model None for this model
SDWS22600None for this model None for this model
SDWS22800None for this model None for this model

   
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