i² i2Engineering

Steel Rivet / Bolt Calculation

Calculation units

Choose units for inputs and results (kN/m² or ton/m²).

1 ton = 9.80665 kN (metric ton-force).

For rivets, tensile capacity uses α_t=0.6; rivets are primarily used in shear.
Steel grade of the bolt or rivet (e.g. 4.6, 5.8, 8.8, 10.9). Defines yield and tensile strength; f_ub and f_yb are taken from this class.
Nominal diameter of the fastener (mm). If area is left blank, A = π·d²/4 is used.
Shank cross-sectional area (mm²). Leave empty to compute from diameter; enter manually for special profiles or large thread diameter.
Axial tensile load on the connection. Compared with tensile capacity (F_t,Rd).
Total shear force on the connection. Checked against shear and bearing capacities.
Thickness of the plate(s) at the hole (usually the thinnest ply). Used in bearing resistance.
Minimum tensile strength of the connected plate (MPa). Structural steel is often 360–460 MPa.
Design safety factor (γ ≥ 1). Capacity = resistance / γ; utilization must not exceed 1. Default for learning: 1.25.
Single shear: one shear plane. Double shear: two shear planes (middle plate); shear capacity is doubled.
Number of bolts or rivets in the joint. Shear and bearing capacities are multiplied by this count.
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