This calculator handles a single bolt. For complete shear tabs, moment connections, and fabrication packages with DSTV NC1 output, upload your PDF drawing.
AISC 360-22 Table J3.2 covers A307 (low-carbon, 27 ksi Fnv), A325 and A490 (54/68 ksi and 68/84 ksi Fnv depending on threads), and F3125 grades A–D which are the successor specification to A325/A490. A325 was withdrawn in 2016 but remains in the AISC SCM for legacy compatibility.
What is the difference between A325-N and A325-X?
N = threads included in the shear plane; X = threads excluded. Fnv for A325-N is 54 ksi; for A325-X it is 68 ksi (AISC 360-22 Table J3.2). Standard connections use A325-N unless the plans specifically call for threads excluded.
What resistance factor φ applies to bolt shear?
AISC 360-22 §J3.6 uses φ = 0.75 for bolt shear (LRFD). The same 0.75 applies to tension (§J3.7) and bearing (§J3.10). For ASD, the safety factor Ω = 2.00.
How is bearing capacity calculated per AISC 360-22?
AISC 360-22 §J3.10(a): Rn = 1.2·Lc·t·Fu ≤ 2.4·db·t·Fu when deformation at bolt holes is a design consideration (standard case). Lc is the clear distance from the bolt hole edge to the nearest hole or plate edge in the direction of force.
What is tearout, and how does it differ from bearing?
Tearout (or end tearout) occurs when the material between the bolt hole and the edge tears out as a plug. Per §J3.10, it is checked as Rn = 1.2·Lc·t·Fu where Lc is the clear distance from the hole edge to the plate edge. Bearing governs for interior bolts; tearout governs for end bolts with small edge distances.