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Strong-Drive® SDCF TIMBER-CF Screw 

Fasteners for the Timber Drive™ System

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

The Strong-Drive SDCF Timber-CF screw is a structural fastener available in a variety of lengths and is designed for cross-laminated timber construction, mass timber construction and general interior applications. These 0.315"- and 0.390"-diameter structural fasteners provide uncompromised strength for these demanding applications. The large flat head with underhead nibs provides for clean countersinking. The yellow zinc, fully-threaded screw with a proprietary point provides fast starts and excellent holding power.

Key Features

  • Designed to be countersunk with head flush to wood surface
  • Fully threaded to provide high withdrawal resistance
  • Flat head with nibs helps countersink the screw for a flush finish
  • Heavy-duty, fully-threaded shank provides strength, with superb withdrawal resistance
  • Head stamp includes length in mm for inspection
  • Interior grade yellow-zinc coating
  • Deep 6-lobe recess for a secure drive (T40 - replacement bit part number BIT40T-134-R2; T50 - replacement bit part number BIT50T-2-R1.)

Applications

  • Beam reinforcement, wall-to-wall, floor-to-floor, support beams, butt joints

Related Links

Catalog Pages

Related Literature

Product Information Table

Fastener Production Information and Stuff & Things
New products
Model No. Coating/Material Length (in.) Head Diameter (in.) Shank Diameter (in.) Drive Type Head Type Thread Length (in.) Packaging Qty.
SDCF221014 Yellow-Zinc Coated 10 1/4 0.590 0.230 T40 6-Lobe Flat Head with Nibs 9 3/4 250
SDCF221014-R50 Yellow-Zinc Coated 10 1/4 0.590 0.230 T40 6-Lobe Flat Head with Nibs 9 3/4 50
SDCF221134 Yellow-Zinc Coated 11 3/4 0.590 0.230 T40 6-Lobe Flat Head with Nibs 11 3/8 250
SDCF221134-R50 Yellow-Zinc Coated 11 3/4 0.590 0.230 T40 6-Lobe Flat Head with Nibs 11 3/8 50
SDCF221334 Yellow-Zinc Coated 13 3/4 0.590 0.230 T40 6-Lobe Flat Head with Nibs 13 3/8 250
SDCF221334-R50 Yellow-Zinc Coated 13 3/4 0.590 0.230 T40 6-Lobe Flat Head with Nibs 13 3/8 50
SDCF22434 Yellow-Zinc Coated 4 3/4 0.590 0.230 T40 6-Lobe Flat Head with Nibs 4 1/4 250
SDCF22434-R50 Yellow-Zinc Coated 4 3/4 0.590 0.230 T40 6-Lobe Flat Head with Nibs 4 1/4 50
SDCF22512 Yellow-Zinc Coated 5 1/2 0.590 0.230 T40 6-Lobe Flat Head with Nibs 5 1/8 250
SDCF22512-R50 Yellow-Zinc Coated 5 1/2 0.590 0.230 T40 6-Lobe Flat Head with Nibs 5 1/8 50
SDCF22614 Yellow-Zinc Coated 6 1/4 0.590 0.230 T40 6-Lobe Flat Head with Nibs 5 7/8 250
SDCF22614-R50 Yellow-Zinc Coated 6 1/4 0.590 0.230 T40 6-Lobe Flat Head with Nibs 5 7/8 50
SDCF22700 Yellow-Zinc Coated 7 0.590 0.230 T40 6-Lobe Flat Head with Nibs 6 5/8 250
SDCF22700-R50 Yellow-Zinc Coated 7 0.590 0.230 T40 6-Lobe Flat Head with Nibs 6 5/8 50
SDCF22858 Yellow-Zinc Coated 8 5/8 0.590 0.230 T40 6-Lobe Flat Head with Nibs 8 1/4 250
SDCF22858-R50 Yellow-Zinc Coated 8 5/8 0.590 0.230 T40 6-Lobe Flat Head with Nibs 8 1/4 50
SDCF271100 Yellow-Zinc Coated 11 0.725 0.290 T50 6-Lobe Flat Head with Nibs 10 3/4 150
SDCF271100-R30 Yellow-Zinc Coated 11 0.725 0.290 T50 6-Lobe Flat Head with Nibs 10 3/4 30
SDCF271958 Yellow-Zinc Coated 19 5/8 0.725 0.290 T50 6-Lobe Flat Head with Nibs 19 3/8 100
SDCF271958-R25 Yellow-Zinc Coated 19 5/8 0.725 0.290 T50 6-Lobe Flat Head with Nibs 19 3/8 25
SDCF272358 Yellow-Zinc Coated 23 5/8 0.725 0.290 T50 6-Lobe Flat Head with Nibs 23 3/8 100
SDCF272358-R25 Yellow-Zinc Coated 23 5/8 0.725 0.290 T50 6-Lobe Flat Head with Nibs 23 3/8 25
SDCF27400 Yellow-Zinc Coated 4 0.725 0.290 T50 6-Lobe Flat Head with Nibs 3 5/8 250
SDCF27400-R30 Yellow-Zinc Coated 4 0.725 0.290 T50 6-Lobe Flat Head with Nibs 3 5/8 30
SDCF27614 Yellow-Zinc Coated 6 1/4 0.725 0.290 T50 6-Lobe Flat Head with Nibs 6 250
SDCF27614-R30 Yellow-Zinc Coated 6 1/4 0.725 0.290 T50 6-Lobe Flat Head with Nibs 6 30
SDCF27778 Yellow-Zinc Coated 7 7/8 0.725 0.290 T50 6-Lobe Flat Head with Nibs 7 5/8 250
SDCF27778-R30 Yellow-Zinc Coated 7 7/8 0.725 0.290 T50 6-Lobe Flat Head with Nibs 7 5/8 30
SDCF27912 Yellow-Zinc Coated 9 1/2 0.725 0.290 T50 6-Lobe Flat Head with Nibs 9 1/8 250
SDCF27912-R30 Yellow-Zinc Coated 9 1/2 0.725 0.290 T50 6-Lobe Flat Head with Nibs 9 1/8 30

Load Tables

SDCF TIMBER-CF Screw — Allowable Lateral Design Values for Single Shear Wood-to-Wood Connections

SDCF TIMBER-CF Screw — Allowable Lateral Design Values for Single Shear Wood-to-Wood Connections
  1. The main member and side members must be sawn lumber, glulam, or CLT with an assigned specific gravity (SG) as shown in the table above or an engineered wood product with a minimum grade of 1.3E and equivalent SG of at least 0.50.
  2. Tabulated reference allowable lateral design values (Z) must be multiplied by all applicable adjustment factors, including the load duration factor, CD, from the NDS as referenced in the IBC or IRC.
  3. Screws must be installed into the face or side grain of the wood main member with the screw axis at a 90-degree angle to the wood surface.
  4. Minimum fastener penetration must be equal to the screw length less the thickness of the wood side member.
  5. Tabulated reference lateral design values apply to combinations of parallel- and perpendicular-to-grain loading.

SDCF TIMBER-CF Screw — Allowable Withdrawal Design Values

SDCF TIMBER-CF Screw — Allowable Withdrawal Design Values
  1. The tabulated reference allowable withdrawal design value, W, is in pounds per inch of the thread penetration into the side grain or face grain of the main member. Thread penetration is the portion of the threaded length held in the main member, including the screw point.
  2. The tabulated reference withdrawal design value, W, is given for a load duration of CD=1.0 and must be multiplied by all applicable adjustment factors from the NDS as referenced in the IBC or IRC.
  3. Wood main members must have an assigned specific gravity (SG) as indicated in the table above or for engineered wood products, a minimum grade of 1.3E and equivalent SG of 0.50.
  4. Reference allowable withdrawal values are for screws installed normal to the side grain of the wood members.

SDCF TIMBER-CF Screw — Allowable Head Pull-Through Design Values (WH)

SDCF TIMBER-CF Screw — Allowable Head Pull-Through Design Values (WH)
  1. The side member must be solid-sawn lumber, glulam or CLT with an assigned specific gravity (SG) as indicated in the table above or for engineered wood products a minimum grade of 1.3E and equivalent SG of 0.50.
  2. Tabulated reference allowable pull-through design values (WH) must be multiplied by all applicable adjustment factors, including the load duration factor, CD, from the NDS as referenced in the IBC or IRC.
  3. Screws must be installed into the face or side grain of the wood side member with the screw axis at a 90° angle to the wood surface.

SDCF Screws Connection Geometry

SDCF Screws Connection Geometry
  1. For SDCF22 screws subject to axial loading only, use the following minimum dimensions: end distance = 3 1/4", edge distance = 1 3/8", spacing parallel to grain = 2 1/4", spacing perpendicular to grain = 1 3/8".
  2. For SDCF27 screws subject to 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".

SDCF Screw Spacing Requirements

SDCF Screw Spacing Requirements

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT