Table 4. Steel design strength for steel bolt / cap screw for Hilti HIT-IC internally threaded inserts for use with ACI 318 Chapter 17 1
Thread Size
5 / 16-18 UNC
3 / 8-16 UNC
1 / 2-13 UNC
Tensile 4 ФN sa lb( kN)
2,740( 12.2)
4,050( 18.0)
9,800( 43.6)
ASTM A193 B7 2, 3 Shear 5 ФV sa lb( kN)
2,555( 11.4)
3,780( 16.8)
6,920( 30.8)
Seismic Shear 6 ФV sa, eq lb( kN)
1,790( 8.0)
2,645( 11.8)
4,845( 21.6)
1 Table values are the lesser of steel failure in the HIT-IC insert or inserted steel bolt. 2 ASTM A193 B7 steel bolts are considered ductile steel elements. 3 Hilti HIT-IC inserts are considered brittle steel elements. 4 Tensile = ϕA se, N f uta as noted in ACI 318-19 17.6.1.2. 5 Shear = ϕ 0.60 A se, V f uta as noted in ACI 318-19 17.7.1.2b. 6 Seismic Shear = α V, seis ϕV sa: Reduction for seismic shear only. See ACI 318 for additional information on seismic applications.
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