Direct Fastening Technical Guide , Edition 24
3.2.7.3 TECHNICAL DATA
Allowable loads in minimum ASTM A36 ( Fy ≥ 36 ksi ; Fu ≥ 58 ksi ) steel 1 , 2
Load type Steel thickness in .
3 / 16 1 / 4 Tension lb ( kN ) 460 ( 2.05 ) 615 ( 2.74 ) Shear lb ( kN ) 460 ( 2.05 ) 500 ( 2.22 )
Allowable loads in minimum ASTM Grade 50 ( Fy ≥ 50 ksi ; Fu ≥ 65 ksi ) steel 1 , 2
Load type
Steel thickness in .
1 / 8 3 / 16 1 / 4 3 / 8 3 1 / 2 3
Tension lb ( kN ) 300 ( 1.33 ) 615 ( 2.74 ) 760 ( 3.38 ) 220 ( 0.98 ) 225 ( 1.00 ) Shear lb ( kN ) 190 ( 0.85 ) 495 ( 2.20 ) 500 ( 2.22 ) 325 ( 1.45 ) 335 ( 1.49 )
1 The tabulated allowable load values are for the X-R fasteners only , using a safety factor of 5.0 to the average ultimate values obtained based on testing in accordance with ICC-ES AC70 and ASTM E1190 . Some conditions like high wind loads , shock or fatigue may require a different safety factor . 2 Fasteners shall be driven to where the point of the fastener penetrates through the steel base material , except as noted . 3 Fasteners installed into 3 / 8 " or thicker base may not achieve point penetration through the steel , but require 0.38 " minimum penetration depth into the steel .
Spacing , edge distances and base material thickness
Rolled shapes Cold-formed shapes Fastened material
* Application limit for cold-formed shapes ** Maximum allowable bx ≤ 8 x t II
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