Cold-Formed Steel: Screws

#8 x 3/4"	#10 x 3/4"	#12 x 1"	#14 x 1"

Values based on the calculated strength of the screw in the connected members per 2001 AISI NAS section E4.3.
The Designer must verify that the screws used for the connectors shown in this catalog have equal or greater allowable load values, as determined from 2001 AISI NAS with the 2004 Supplement section E4, than those in the table directly above if using other than Quik Drive screws shown in the table.
Values are based on cold-formed steel (CFS) members with a minimum yield strength of Fy = 33 ksi and tensile strength of Fu = 45 ksi for 43 mil (18 ga) and thinner and a minimum yield strength of Fy = 50 ksi and Fu = 65 ksi for 54 mils (16 ga) and thicker.
Minimum thickness represents 95% of the design thickness and is the minimum acceptable base metal thickness based on 2001 AISI NAS section A2.4. Design thickness for the steel sheets are: 33 mil = 0.0346", 43 mil = 0.0451", 54 mil = 0.0566", 68 mil = 0.0713", and 97 mil = 0.1017".
Screw diameters per 2001 AISI NAS Commentary Table C-E4-1.
Minimum required screw length is the lesser of 3/4" or the minimum length required for the screw to extend through the steel connection a minimum of (3) exposed threads per AISI General Provisions Standard section D1.3.
Larger of screw head or washer diameter, dw, for #10 and #12 screws is 0.375".
Larger of screw head or washer diameter, dw, for #14 and 1/4" hex head screw is 0.50"..
The tabulated values may be increased by 1/3 for seismic or wind loading as applicable per "Steel Stress Increase" section.