Strong-Drive® SDCF TIMBER-CF Screw

Product Details

The Strong-Drive SDCF Timber-CF screw is a structural fastener available in a variety of lengths and is designed for cross-laminated timber (CLT), 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 unique point, provides fast starts with no predrilling and excellent withdrawal and shear resistance. For interior and dry applications only.

Key Features

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 (replacement bit: BIT50T-134 for 23 5/8" length; BIT40T-134 for all others)
Available in 0.315” x 4 3/4", 5 1/2", 6 1/4", 7", 8 5/8", 10 1/4", 11 3/4", 13 3/4"; 0.390” x 4", 5 1/2", 6 1/4", 7 7/8", 8 5/8", 9 1/2", 11", 19 5/8", 23 5/8"

Applications

Beam reinforcement, wall-to-wall, floor-to-floor, support beams, butt joints, bearing reinforcement, splitting reinforcement

Related Literature

Strong-Drive® SDCF TIMBER-CF Screw For Mass Timber and CLT Fastening

S-F-SDCF22

A flier providing product and installation information about the Strong-Drive SDCF TIMBER-CF screw.

Flier

Connectors and Fasteners for Mass Timber Construction Catalog

C-C-MASSTIMBER20

A catalog featuring connectors and fasteners for mass timber and CLT construction solutions.

Catalog

Mass Timber Washer Strap (MTWS) for CLT

F-C-CLTMTWS22

A flier providing product and installation information about the MTWS mass timber washer strap.

Flier

SDCF TIMBER-CF As Compression Reinforcement

TEB-F-SDCFCOMP21

Values for Strong-Drive® SDCF Timber-CF screws when used for compression reinforcement perpendicular to grain in glue-laminated timber (glulam), cross-laminated limber (CLT), and heavy timbers.

Technical Bulletin

Installation Torque & Tools for SDCF TIMBER-CF, SDCP TIMBER-CP and SDHR COMBO-HEAD Screws

L-F-MTINSTALL22

The purpose of this letter is to convey recommendations for installation of Strong-Drive SDCF TIMBER-CF Screws, SDCP TIMBER-CP Screws and SDHR COMBO-HEAD Screws.

Engineering Letter

MTW45-8 Mass-Timber Angled Washer Installed with Strong-Drive® SDCF Timber-CF Screws

L-MTW45SDCF22

The purpose of this letter is to present allowable loads and stiffness behavior for the MTW45-8 mass-timber angled washer when installed with Strong-Drive® SDCF Timber-CF screws.

Engineering Letter

Strong-Drive® SDCF, SDCP, and SDHR screws in ICC-ES ESR-3046

L-F-SDCFCPHR21

Simpson Strong-Tie® Strong-Drive® SDCF Timber-CF screw, SDCP Timber-CP screw and SDHR Combo-Head screw are now listed in ICC-ES ESR-3046.

Engineering Letter

Simpson Strong-Tie® Strong-Drive® SDCF TIMBER-CF Screw

L-F-SDCFSCREW20

Strong-Drive® SDCF Timber-CF screws are load rated for shear, pull-through and withdrawal resistance in sawn wood, glulam, CLT and engineered wood products.

Engineering Letter

Simpson Strong-Tie® Strong-Drive® SDCF TIMBER-CF Screws

L-F-SDCFCAN22

This letter provides design information for Simpson Strong-Tie Strong-Drive SDCF TIMBER-CF screws used in wood-to-wood connections in accordance with CSA Standard O86-14 and NBC 2015.

Engineering Letter

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	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