Strong-Drive® SDWS™ TIMBER SS Screw
Fasteners for the Timber Drive™ System
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Product Details
Introducing the Strong-Drive SDWS Timber SS heavy-duty structural fastener in severe corrosion–resistant Type 316 stainless steel. Its heavy-duty 0.275"-diameter shank, SawTooth® point and flat washer head make the SDWS Timber SS the ideal choice for use in applications such as docks, wharves, piers, boardwalks and ledgers where strength and severe-corrosion resistance are critical.
Key Features
- 0.275" shank diameter for heavy-duty structural applications
- SawTooth point design for fast starts and no predrilling
- Ideal replacement for spikes, lag bolts and lag screws
- No predrilling, no counterboring required for most applications
- Large flat head with nibs can drive flush to surface with reduced splintering
- Deep T50 6-lobe recess for a secure drive (replacement driver bit — BIT50T-2-R1)
Applications
- Structural wood-to-wood and engineered-wood connections in coastal or severe corrosion environments. Typical applications include piers, boardwalks, wharves and ledgers.
Product Includes
- Retail clamshells, cartons and buckets include 6-lobe, T50 driver bit (replacement part #BIT50T-2-R1)
Patent Information
- US Patents 9,523,383; 11,181,138
Related Links
Catalog Pages
- Fastener Product Information: C-F-2023 (Fastening Systems), page 60
- Fastener Technical Data and Loads: C-F-2023TECHSUP, pages 51–52 and pages 158 and 167–169
Related Literature
Product Information Table
| Model No. | Coating/Material | Length (in.) | Head Diameter (in.) | Shank Diameter (in.) | Drive Type | Head Type | Thread Length (in.) | Point Type | Packaging Qty. |
|---|---|---|---|---|---|---|---|---|---|
|
Footnotes
|
|||||||||
| SDWS271000SS-R30 | Type 316 Stainless Steel | 10 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 30 |
| SDWS271000SSRC10 | Type 316 Stainless Steel | 10 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 10 |
| SDWS271000SS-RP1 | Type 316 Stainless Steel | 10 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 1 |
| SDWS271200SS-R30 | Type 316 Stainless Steel | 12 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 30 |
| SDWS271200SS-RP1 | Type 316 Stainless Steel | 12 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 1 |
| SDWS27300SS | Type 316 Stainless Steel | 3 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 2 | SawTooth® Point | 350 |
| SDWS27300SS-R30 | Type 316 Stainless Steel | 3 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 2 | SawTooth® Point | 30 |
| SDWS27300SS-RC10 | Type 316 Stainless Steel | 3 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 2 | SawTooth® Point | 10 |
| SDWS27300SS-RP1 | Type 316 Stainless Steel | 3 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 2 | SawTooth® Point | 1 |
| SDWS27400SS | Type 316 Stainless Steel | 4 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 350 |
| SDWS27400SS-R30 | Type 316 Stainless Steel | 4 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 30 |
| SDWS27400SS-RC10 | Type 316 Stainless Steel | 4 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 10 |
| SDWS27400SS-RP1 | Type 316 Stainless Steel | 4 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 1 |
| SDWS27500SS | Type 316 Stainless Steel | 5 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 300 |
| SDWS27500SS-R30 | Type 316 Stainless Steel | 5 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 30 |
| SDWS27500SS-RC10 | Type 316 Stainless Steel | 5 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 10 |
| SDWS27500SS-RP1 | Type 316 Stainless Steel | 5 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 1 |
| SDWS27600SS | Type 316 Stainless Steel | 6 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 300 |
| SDWS27600SS-R30 | Type 316 Stainless Steel | 6 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 30 |
| SDWS27600SS-RC10 | Type 316 Stainless Steel | 6 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 10 |
| SDWS27600SS-RP1 | Type 316 Stainless Steel | 6 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 1 |
| SDWS27800SS | Type 316 Stainless Steel | 8 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 200 |
| SDWS27800SS-R30 | Type 316 Stainless Steel | 8 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 30 |
| SDWS27800SS-RC10 | Type 316 Stainless Steel | 8 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 10 |
| SDWS27800SS-RP1 | Type 316 Stainless Steel | 8 | 0.650 | 0.275 | T50 6-Lobe | Washer Head | 3 | SawTooth® Point | 1 |
Load Tables
See footnotes below.
- All applications are based on full penetration into the main member. Full penetration is the screw length minus the side member thickness.
- Allowable loads are shown at the wood load duration factor of 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 per the NDS.
- For minimum fastener spacing requirements for both side and main members, see the Spacing Requirements Figure and Table below.
- For in-service moisture content greater than 19%, use CM = 0.7.
- Loads are based on installation into the side grain of the wood with the screw axis perpendicular to the face of the member.
- The tabulated reference withdrawal design value, W, is in pounds per inch of the thread penetration into the side grain of the main member.
- 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.
- Embedded thread length is that portion held in the main member including the screw point.
- Values are based on the lesser of withdrawal from the main member or pull-through of a 1 1/2" side member.
SDWS Timber SS Screw Spacing Requirements
- For axial loading only, use the following minimum dimensions: end distance = 4", edge distance = 1 5/8", spacing parallel to grain = 2 7/8", spacing perpendicular to grain = 2".
SDWS TIMBER SS Screw â 2021 and 2018 IRC Compliant Spacing for a Sawn Lumber Deck Ledger-to-Rim Board
- SDWS27SS screw spacing values are equivalent to 2021/2018 IRC Table R507.9.1.3(1) and 2015 IRC Table R507.2. The table also provides SDWS27SS screw spacing for a wider range of materials commonly used for rim board, and an alternate loading condition as required by some jurisdictions.
- Solid-sawn rim board 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.
- Fastener spacings are based on the lesser of single fastener ICCES AC233 testing of the Strong-Drive SDWS27SS screw with a safety factor of 5.0 or ICC-ES AC13 assembly testing with a factor of safety of 5.0. Spacing includes NDS wet service factor adjustment.
- Screws shall be placed 1.5" to 2" from the top and bottom of the ledger or rim board with 3" minimum and 6" maximum vertical distance between fasteners with horizontal on-center spacing per the table. End screws shall be located 6" from the end and at 1.5" to 2" from the bottom of the ledger. For screws located at least 2" but less than 6" from the end, use 50% of the load per screw and 50% of the table spacing between the end screw and the adjacent screw, and for screws located between 2" and 4" from the end, predrill using a 3/16" drill bit.
- Structural sheathing between the ledger and rim board shall be a maximum of 1/2" thick and fastened per code.
See the Fastening Systems Technical Guide and refer to the Alphabetical Index for additional load tables, technical data and installation instructions for the Strong-Drive® SDWS Timber SS screw.
Code Reports & Compliance
Drawings
| DWG | DXF | RFA | IFC | SAT | |||
|---|---|---|---|---|---|---|---|
