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General Load Tables

Quik Drive Screws Shear and Tension Loads

  1. Screws have been tested per AISI Standard Test Method TS-04. The tabulated allowable loads are based on the screw average ultimate strength with a factor of safety (Ω=3.0) as determined per 2001 AISI NASPEC with 2004 Supplement section E4.
  2. Use the member connection allowable load tables for connection design.

Cold-Formed Steel Member Connection Loads

  1. Screws and screw connections have been tested per AISI Standard Test Method TS-4 and TS-5.
  2. The tabulated ASD allowable loads for cold-formed steel (CFS) members are based on the lower of the screw strength or the strength of the screw in the connected members per 2001 AISI NASPEC & 2004 NASPEC Supplement Section E4.
  3. The safety factor is based on AISI NASPEC Chapter F for tested connections.
  4. The average ultimate values listed are achieved under laboratory conditions and should not be used for design loads.
  5. Values are based on cold-formed steel (CFS) members with a minimum yield strength of Fy=228 MPa and tensile strength of Fu=310 MPa for 1.2 mm to 0.7 mm, a minimum yield strength of Fy=345 MPa and tensile strength of Fu=448 MPa for 0.6 mm, and a minimum yield strength of Fy=345 MPa and Fu=448 MPa for 1.5 mm and thicker.
  6. For design purposes, steel sheet thicknesses are 0.577 mm for 0.6 mm, 0.719 mm for 0.7 mm, 0.879 mm for 0.9 mm, 1.146 mm for 1.2 mm, 1.438 mm for 1.5 mm, 1.811 mm for 2.0 mm, and 2.583" for 2.5 mm. The actual sheet thickness shall not be less than 95% of these design thicknesses as specified in AISI/COS/NASPEC 2001 AISI Standard section A2.4.
  7. Screw diameters per 2004 AISI General Provisions Commentary Table D1-1.
  8. Minimum required screw length is the lesser of 19.05 mm or the minimum length required for the screw to extend through the steel connection a minimum of 3 exposed threads per AISI 2004 General Provisions Standard section D1.3.
  9. Larger of screw head or washer diameter, dw for #10 and #12 screws is 9.525 mm.
  10. The allowable load (ASD) values showing are not permitted to be increased for short-duration loads such as wind or earthquake loads.
  11. The lower Pull-Over or Pull-Out allowable load should be used for tension design.
  12. Steel thickness applies to thinner steel members. Both steel members must be in the Timber Member Connection Loads range of .7–2.5 mm

Timber Member Connection Loads

  1. Values based on the lower screw strength or strength of the screw in the connected members.
  2. Screws and screw connections have been tested per AISI Standard Test Method TS-4.
  3. The tabulated allowable loads for timber members are based on a factor of safety of 5 as specified in AC233 and multiplied by CD = 1.60 for wind or earthquake loads.
  4. The average ultimate loads are achieved under laboratory conditions and should not be used for design purposes.
  5. Screw diameters per 2004 AISI General Provisions Commentary Table D1-1.
  6. The lower steel pull-over or timber pull-out allowable load should be used for tension design.
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