The ultimate strength, Fu of Grade 8.8 bolts are 800 MPa and its shear strength, Fv is 145 MPa when threads are on the shear plane and 210 MPa when the treads are exccluded from the shear plane.
For Diameter 5/8" (16mm) Shear strength is 30 kN when threads are included in the shear plane...
For Tension I usually compute the Pull-out resistance, Concrete Cone Resistance,& Steel Tensile Resistance and compare them. The smallest value would be the Design Tensile Resistance of the connection system.
For Shear I usually compute the Concret Edge Design Resistance against the Steel Shear...
