The American Iron and Steel Institute (AISI) has published a new research report that reviews the existing provisions of AISI S100-16, North American Specification for the Design of Cold-Formed Steel Structural Members, 2016 Edition, for screw connections loaded in shear and tension (but not combined actions). A summary of the research project, findings and analysis are published in RP19-1:Strength of Steel-to-Steel Screw Connections
Capacity of Screw Connections between Plasterboard was proposed to describe the screw connection capacity between plasterboards and cold-formed steel studs. The formulation was developed based on a general form of design equations for bearing resistance of screw connections while also taking into account the equivalent diameter of screws for the actual contact area between screw andplasterboard.
AISI CALCuLATED ALLOWAbLE LOADS FOR SCREW CONNECTION Material thickness (mils) Design thickness (in) Material Strength #8-18 HWH Screw #10-16 HWH Screw #12-14 HWH Screw 1/4"-14 HWH Screw Dia. = 0.160 Dia. = 0.190 Dia. = 0.210 Dia. = 0.240 Fy (ksi) Fu (ksi) Shear (lbs) Tension (lbs) Shear (lbs) Tension (lbs) Shear (lbs) Tension (lbs) Shear (lbs) Tension (lbs)
Experimental study on screw connections in cold-formed Feb 26, 2019 · Fairuz, SS, Ho, LH (2013) Influence of screw spacing on the strength of self-drilling screw connection for the high strength cold-formed steel. Advanced Material Research 712715:1054 1057. Google Scholar Crossref
Experiments and finite element modelling of screw pattern Dec 01, 2019 · The connection strengths of the screw patterns for 3, 4, and 5 screws are 5.95%, 1.52%, and 3.91% lesser when compared to the number of screws. Although the differential percentages are less than 10%, the screw arrangement does contribute to some effects for the screw connection strength. Download :Download high-res image (413KB)
Cold-formed steel structural members are used extensively in building construction, with a common application being wind load bearing steel studs. The studs frame into horizontal steel track members at the top and bottom of the wall assembly, with the stud-to-track connection typically being made with self-drilling screws or welds.
Strength of Screw Connections Subject to Shear ForceThere exists a standard for testing screw strength. The American Iron and Steel Institutes Cold-Formed Steel Design Manual (AISI, 2002) gives test methods for determining the strength of a screw connection. In the AISI TS-4-02 and AISI TS-5-02, the standard test methods for determining the tensile and shear strength of screws
Strength of Steel-to-Steel Screw Connections - Update to This study performed a comprehensive analysis of available steel-to-steel screw connection strength test data, totaling 702 shear tests, 143 pull-over tests, and 335 pull-out tests. The tested strength of these connections was compared to the predicted strength from the existing strength equations in the AISI S100-16 Standard.
Strength of Screw Connections in Cold-Formed Steel Construction. This paper presents a review of the design provisions for screw-fastened cold-formed steel connections in the United States, including criteria for testing and evaluating the strength of screw fasteners.