3.2.2.4 RECOMMENDED FASTENER LENGTHS FOR ATTACHING WOOD TO STEEL BASE MATERIAL 2 , 4
3 3
X-U
1
1
5 5
Notes : 1 X-U or DS up to 62 mm long may be used in base steel up to 1 / 4 " ( 6 mm ) thick . 2 If the application limit is exceeded , shank buckling can occur . 3 Numbers in ⃝ and ⃞ represent fastener shank length in mm . 4 Based upon a base steel tensile strength ( F u
) of less than or equal to 70 ksi . 5 For installation of 2 x 4 to steel ( 1 / 4 ” - 3 / 8 ”), the X-U 47 is the most appropriate choice .
3.2.2.5 RECOMMENDATIONS FOR ATTACHING STEEL TO STEEL BASE MATERIAL t I
≤ 1 / 8 in . ( 3 mm )
Directly fastened material ≤ 1 / 8 " thick usually deforms with the displaced base material . This allows a tight fit between the fastened steel and base material without the need for pre-drilling . Thicker fastened materials may need to be pre-drilled .
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