# Pin/Bolt Safety Check

You can determine if a bolt or a pin in an assembly can safely carry the applied loads, or if it will fail.

The software calculates the combined load ratio a connector withstands and compares it with the user-defined factor of safety.

The pass/no-pass check for connectors is available for linear and nonlinear static studies. For nonlinear studies, the software displays the pass/no pass status of all pin and bolt connectors for each solution step.

 Axial load ratio Ra = F/(At*S) F = axial load calculated by the software At = tensile area S = strength value of connector's material or grade (could be yield, ultimate, proof or shear strength based on application) Bending load ratio Rb = D*M/(2*S*I) M = Bending moment calculated by the software, D = nominal shank diameter S = strength value of connector's material or grade (could be yield, ultimate, proof or shear strength based on application) I =0.25*p*r^4 Shear load ratio Rs = V/(At*S) V = Shear load calculated by the software At = tensile area S = strength value of connector's material or grade (could be yield, ultimate, proof or shear strength based on application) Combined load ratio (Ra + Rb)^2 + Rs ^3 Pass/ No Pass Safety Check Connector pass criterion 1 / ((Ra + Rb)^2 + Rs ^3) > SF SF = user-defined factor of safety Connector no pass criterion 1 / ((Ra + Rb)^2 + Rs ^3) < SF

### Related Topics

Pin/Bolt Check

Connector - Bolt

Connector - Pin

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