The interaction equation (LSM) for checking the bolts for combined shear and tension is
1
\(\frac{{{V_b}}}{{{V_{db}}}} + \frac{{{T_b}}}{{{T_{db}}}} = \;\le 1\)
2
\(\frac{{{V_b}}}{{{V_{db}}}} + \frac{{{T_b}}}{{{T_{db}}}} = \;\le 1.4\)
3
\({\left( {\frac{{{V_{sb}}}}{{{V_{db}}}}} \right)^2} + {\left( {\frac{{{T_b}}}{{{T_{db}}}}} \right)^2} \le 1\)
4
\({\left( {\frac{{{V_{sb}}}}{{{V_{db}}}}} \right)^2} + {\left( {\frac{{{T_b}}}{{{T_{db}}}}} \right)^2} \le 1.4\)