You can see that, for ACI318, AS3600 and IS 456, the unreinforced stress ratio (USR) is less than 1.0 and hence punching shear capacity is satisfactory.

The USR for BS8110 is 1.17. Since the stress ratio exceeds 1.0, shear reinforcement is required. RAM Concept designs stud shear reinforcement (SSR) for such situations.