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Strong-Drive® WSNTL SUBFLOOR Screw 

Strong-Drive® WSNTL SUBFLOOR Screw

The ICC-ES ESR-1472 code-listed Strong-Drive WSNTL Subfloor screw has a unique thread pattern that allows for quick and seemingly effortless installations. With lateral, shear and withdrawal values that exceed those of 10d common nails, the holding power of the WSNTL screw eliminates the gaps between the joist and subfloor that cause floor squeaks. The WSNTL Subfloor screw countersinks easily and backs out smoothly, allowing for easy future access to floor cavities.

Key Features

  • Deep recessed square drive holds bits tight, reducing cam-outs
  • Twin-lead thread for quick installation
  • Nibbed flat head for easy countersinking
  • Yellow zinc coating for interior applications

Applications

  • Subfloor and sheathing projects

Product Includes

  • Driver bit BIT3S-2-RC3

Installation

  • Fastener penetration into supporting member must be at least 13/16"

Related Literature

Product Information Table

Fastener Production Information and Stuff & Things
Model No. Coating/Material Screw Size Length (in.) Head Diameter (in.) Drive Type Head Type Thread Type Point Type Packaging Qty. UPC
WSNTL212R400 Yellow Zinc Dichromate Coating #8 2 1/2 0.330 #3 Square Flat Head Twin Threads Sharp Point 400 707392629498
WSNTL212R80 Yellow Zinc Dichromate Coating #8 2 1/2 0.330 #3 Square Flat Head Twin Threads Sharp Point 80 707392686354
WSNTL2R100 Yellow Zinc Dichromate Coating #8 2 0.330 #3 Square Flat Head Twin Threads Sharp Point 100 707392389293
WSNTL2R500 Yellow Zinc Dichromate Coating #8 2 0.330 #3 Square Flat Head Twin Threads Sharp Point 500 707392781387
WSNTL3R300 Yellow Zinc Dichromate Coating #8 3 0.330 #3 Square Flat Head Twin Threads Sharp Point 300 707392323525
WSNTL3R60 Yellow Zinc Dichromate Coating #8 3 0.330 #3 Square Flat Head Twin Threads Sharp Point 60 707392863878

Product Information Table

Model No. Length (in.) Screw Size Drive Type Head Diameter (in.) Head Type Thread Type Point Type Coating/Material Packaging Quantity UPC
WSNTL212R400 2 1/2 #8 #3 Square 0.33 Flat Head Twin Threads Sharp Point Yellow-Zinc Dichromate Coating 400 707392629498
WSNTL212R80 2 1/2 #8 #3 Square 0.33 Flat Head Twin Threads Sharp Point Yellow-Zinc Dichromate Coating 80 707392686354
WSNTL2R100 2 #8 #3 Square 0.33 Flat Head Twin Threads Sharp Point Yellow-Zinc Dichromate Coating 100 707392389293
WSNTL2R500 2 #8 #3 Square 0.33 Flat Head Twin Threads Sharp Point Yellow-Zinc Dichromate Coating 500 707392781387
WSNTL3R300 3 #8 #3 Square 0.33 Flat Head Twin Threads Sharp Point Yellow-Zinc Dichromate Coating 300 707392323525
WSNTL3R60 3 #8 #3 Square 0.33 Flat Head Twin Threads Sharp Point Yellow-Zinc Dichromate Coating 60 707392863878

Load Tables

WSNTL – Allowable Shear – Wood Structural Panel Diaphragms with Framing of Douglas Fir-Larch or Southern Pine for Wind or Seismic Loading (2", 2 1/2" and 3" Lengths) (in Pounds per Foot)1-8

  1. Minimum fastener penetration of 1 1/4" into the framing member is required.
  2. For wind design, shear capacities may be increased 40% per section 2306.3.2 of the 2006 IBC, 2306.2.1 of the 2009 IBC, and 2306.2 of the 2012 /2015 IBC.
  3. Allowable loads are shown at the wood load duration of CD=1.6. No further increases shall be permitted. For shear loads of normal or permanent load duration as defined by the NDS-2012, the values in the table above must be multiplied by 0.63 or 0.56, respectively.
  4. The minimum nominal width of framing members not located at boundaries or adjoining panel edges must be 2".
  5. Framing at adjoining panel edges must be 3" nominal or wider, and screws must be staggered where both of the following conditions are met: (1) screws having penetration into framing of more than 1 1/2" and (2) screws are spaced 3" o.c. or less.
  6. Space screws maximum 12" o.c. along intermediate framing members (6" o.c. where supports are spaced 48" o.c.).
  7. Framing at adjoining panel edges must be 3" nominal or wider, and screws must be staggered where screws are spaced 2" or 2 1/2" on center.
  8. See ICC-ES ESR-1472 for allowable shear loads for high load diaphragms.
WSNTL_Diagrams

WSNTL – Allowable Withdrawal and Pull-Through Loads for Wind or Seismic Loading1-6

  1. Use the lower of the pull-through or withdrawal values to determine axial design value.
  2. Screws must be installed straight into the side grain of the wood main member with the screw axis at a 90° angle to the wood fibers.
  3. The main framing member must be wood having a minimum specific gravity of 0.50 for DFL and SP main members, and 0.42 for SPF and HF main members. DFL is Douglas Fir-Larch. SP is Southern Pine. SPF is Spruce-Pine-Fir. HF is Hem-Fir.
  4. Table based on testing conducted in accordance with AC233. Design values presented are based on average ultimate values and divided by 5.
  5. Allowable loads are shown at the wood load duration factor of CD = 1.0. Loads may be increased for load duration up to CD = 1.6.
  6. The model number may end in the designation L or R, indicating that the screws are packaged as collated or for hand drive, respectively.

IBC Equivalent Prescriptive Fastening Schedule1

  1. Fastener penetration into the supporting member must be a minimum of 13/16".

WSNTL — Allowable Loads Comparison of Common Fasteners Used to Attach Truss Plies Together1-6

  1. Table values are based on attachment of a 1 1/2" side member to a 1 1/2" main member of the same species and grade.
  2. Table values are based on the 2012 NDS, CD=1.0. Values shall be multiplied by all applicable factors, such as duration of load, etc. except where noted.
  3. Specific Gravities (G) assumed: DFL G = 0.50, SP G = 0.55, SPF G = 0.42.
  4. The spacing of applied uniform loads to the multi-ply member shall not exceed 24 inches on center.
  5. Assumes collated nail Fyb = 100 ksi.
  6. WSNTL212S and WSNTL3S withdrawal values based on testing per AC233.
  7. The model name may end in the designation L or R, indicating that the screws are packaged as collated or for hand drive, respectively.

See additional Load Tables, Technical Data and Installation Instructions for the Strong-Drive® WSNTL Subfloor screw.