Rivets and bolts subjected to both shear stress (τ
vf, cal) and axial tensile stress (σ
tf, cal) shall be so proportioned that the stresses do not exceed the respective allowable stresses τ
vf and σ
tf and the value of
|  | τvf, cal | + | σtf, cal |  | |
τvf | σtf |
does not exceed