Table Notes

1. AllowableStructural Members.screw connection capacities are based upon section E4 of the AISI S100-12, North American Specification for the Design of Cold-Formed Steel
2. henare connected.connecting materials of different steel thicknesses or tensile strengths, use the lowest values. Tabulated values assume two sheets of equal thickness
3. Screw shear and tension capacities were developed using published screw manufacturer data and evaluation reports available at the time of publications.
4. A nominal shear stress of 42.85 ksi and a nominal tension stress of 40.84 ksi were used for calculations based on screw manufacturer data.
5. Screw capacities are based upon Allowable Strength Design (ASD) and include safety factor of
6. When multiple fasteners are used, screws are assumed to have a center-to-center spacing of at least 3 times the nominal diameter (d).
7. Screws are assumed to have a center of screw to edge of steel dimension of at least 1.5 times the nominal diameter (d) of the screw.
8. Tensionhead diameter).capacity is based upon the lesser of pullout capacity in sheet closest to screw tip, or pullover capacity for sheet closest to screw head (based upon
9. Noteduce thata non-uniformfor all tensionpullovervaluesforcecalculatedof the fastener.in screw table, pullover values have been reduced by 50%, assuming eccentrically loaded connections that pro-
10. Screw capacities are governed by a conservative estimate of screw capacity, not by sheet steel failure.
11. For higher screw capacities, especially for screw strength, use specific screws from specific manufacturers. See manufacturers’ data for specific allowable values and installation instructions.